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SP3080E-3088E
Advanced-Failsafe RS-485/RS-422 Transceivers 1/8th Unit Load, Slew-Rate Limited, 15kV ESD-Protected
FEATURES
* 5.0V single supply operation * Receiver failsafe on open, shorted or terminated lines * 1/8th Unit Load, 256 transceivers on bus * Robust ESD protection for RS-485 pins o 15kV Air-Gap Discharge o 15kV Human Body Model o 8kV Contact Discharge * Controlled driver slew rates o 115kbps, Low EMI (SP3080E, SP3081E, SP3082E) o 500kbps, Low EMI (SP3083E, SP3084E, SP3085E) o High Speed, 20Mbps (SP3086E, SP3087E, SP3088E) *Hot Swap glitch protection on control inputs *Driver short circuit current limit and thermal shutdown for overload protection *Ultra-low 400A quiescent current *1A shutdown mode (except SP3081, SP3084, SP3087) *Industry standard package footprints
RO 1 RE 2 DE 3 DI 4
8 PIN NSOIC SP3082E SP3085E SP3088E Half Duplex
8 Vcc 7B 6A 5 GND
Vcc 1 RO 2 DI 3 GND 4
8 PIN NSOIC SP3081E SP3084E SP3087E Full Duplex
8A 7B 6Z 5Y
NC 1 RO 2 RE 3
14 PIN NSOIC
14 Vcc 13 NC 12 A 11 B 10 Z 9Y 8 NC
APPLICATIONS
* Motor Control * Building Automation * Security Systems * Remote Meter Reading * Long or un-terminated transmission lines
DE 4 DI 5 GND 6 GND 7
SP3080E SP3083E SP3086E Full Duplex
The SP3080E-SP3088E family of RS-485 devices are designed for reliable, bidirectional communication on multipoint bus transmission lines. Each device contains one differential driver and one differential receiver. SP3082E, SP3085E and SP3088E are half-duplex devices; other part numbers are full-duplex. All devices comply with TIA/EIA-485 and TIA/EIA-422 standards. Lead-free and RoHS compliant packages are available for all models. These devices are ruggedized for use in harsh operating conditions over the entire common-mode voltage range from -7V to +12V. Receivers are specially designed to fail-safe to a logic high output state if the inputs are left un-driven or shorted. All RS-485 bus-pins are protected against severe ESD events up to 15kV (Air-Gap and Human Body Model) and up to 8kV Contact Discharge (IEC 10004-2). Drivers are protected from excess current flow caused by bus contention or output short-circuits by both an internal current limit and a thermal-overload shutdown. Devices are rated for industrial (-40 to +85C) operating temperatures. Receivers have exceptionally high input impedance, which places only 1/8th the standard load on a shared bus. Up to 256 transceivers may coexist while preserving full signal margin. All devices operate from a single 5.0V power supply and draw negligible quiescent power. All versions except the SP3081E, SP3084E, and SP3087E may independently enable and disable their driver and receiver and enter a low power shutdown mode if both driver and receiver are disabled. All outputs maintain high impedance in shutdown or when powered-off.
Rev M 2/22/2007 SP3080E-3088E Advanced RS485 Transceivers (c) Copyright 2007 Sipex Corporation
DESCRIPTION
1
Devices are available in three industry standard architectures and footprints. In each footprint there are three speed grades available.
DEVICE ARCHITECTURE AND BLOCK DIAGRAMS
NC RO
1 2 R
3 RE DE 4 DI GND GND 5 6 7 D
14 VCC 13 NC 12 A 11 B 10 Z
14-Pin Full Duplex SP3080E, 115kbps slew rate limited SP3083E, 500kbps slew rate limited SP3086E, 20Mbps
9Y 8 NC
VCC 1 RO 2 R
8A 7B 6 Z
8-Pin Full Duplex SP3081E, 115kbps slew rate limited SP3084E, 500kbps slew rate limited SP3087E, 20Mbps
DI GND
3 4
D
5Y
8-Pin Half Duplex RO 1 2 R 8 VCC 7B 6 A D 5 GND SP3082E, 115kbps slew rate limited SP3085E, 500kbps slew rate limited SP3088E, 20Mbps
RE DE 3 4 DI
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
2
PIN ASSIGNMENTS Pin Number Full-Duplex SP3080E SP3081E SP3083E SP3084E SP3086E SP3087E 2 2 Half Duplex SP3082E SP3085E SP3088E 1 RO Receiver Output. When RE is low and if (A - B) -40mV, RO is high. If (A - B) - 200mV, RO is low. Receiver Output Enable. When RE is low, RO is enabled. When RE is high, RO is high impedance. Drive RE high and DE low to enter shutdown mode. RE is a hot-swap input. Driver Output Enable. When DE is high, outputs are enabled. When DE is low, outputs are high impedance. Drive DE low and RE high to enter shutdown mode. DE is a hot-swap input. Driver Input. With DE high, a low level on DI forces non-inverting output low and inverting output high. A high level on DI forces noninverting output high and inverting output low. Ground Non-inverting Driver Output Inverting Driver Output Inverting Receiver Input Inverting Receiver Input and Inverting Driver Output Non-inverting Receiver Input Non-inverting Receiver Input and Non-inverting Driver Output Positive Supply VCC. Bypass to GND with a 0.1uF capacitor. No Connect, not internally connected Pin Name Pin Function
3
-
2
RER
EREE
4
-
3
DE
5
3
4
DI
6, 7 9 10 11 12 14 1, 8, 13
4 5 6 7 8 1 -
5 7 6 8 -
GND Y Z B B A A VCC NC
Note: On 14-pin packages connect both pins 6 and 7 to Ground.
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
3
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
Supply Voltage (VCC)...............................................+ 7.0V Input voltage at control input pins (RE, DE) ..... -0.3V to VCC+0.3V Driver input voltage (DI) .....................-0.3V to VCC+0.3V Driver output voltage (A, B, Y, and Z) ...................+/-13V Receiver output voltage (RO) ........-0.3V to (Vcc + 0.3V) Receiver input voltage (A, B) ................................+/-13V Package Power Dissipation: Maximum Junction Temperature 150C 8-Pin SO JA = 128.4C/W 14-Pin SO JA = 86C/W Storage Temperature.............................-65C to +150C Lead Temperature (soldering, 10s)..................... +300C
Vcc=5V 5%, TMIN to TMAX, unless otherwise noted, Typical values are Vcc=5V and TA=25C
Recommended Operating Conditions Supply Voltage, VCC Input Voltage on A and B pins High-level input voltage (DI, DE or RE), VIH Low-level input voltage (DI, DE or RE), VIH Output Current Driver Receiver Signaling Rate, 1/tUI SP3080, SP3081, SP3082 SP3083, SP3084, SP3085 SP3086, SP3087, SP3088 Operating Free Air Temperature, TA Industrial Grade (E) -40 Min. 4.5 -7 2 0 -60 -8 Nom. 5 Max. 5.5 12 VCC 0.8 60 8 0.115 0.5 20 85
RECOMMENDED OPERATING CONDITIONS
Unit V V V V
mA
Mbps
C
Note: The least positive (most negative) limit is designated as the maxium value.
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
4
ELECTRICAL CHARACTERISTICS
PARAMETER Digital Input Signals: DI, DE, RE High, VIH Low, VIL TA = 25C, after first transition TA = 25C 100 2.0 0.8 1 TEST CONDITIONS MIN TYP MAX UNIT
Logic input thresholds Logic Input Current Input Hysteresis Driver Differential Driver Output (VOD) Differential Driver Output, Test 1 Differential Driver Output, Test 2 Change in Magnitude of Differential Output Voltage (VOD) (Note 1) Driver Common Mode Output Voltage (Vcc) Change in Common Mode Output Voltage (VOC) Driver Short Circuit Current Limit
V A mV
No Load RL=100 (RS-422) RL=54 (RS-485) VCM = -7 to +12V RL=54 or 100 RL=54 or 100 RL=54 or 100 -7V VOUT +12V DE=0, VOUT=12V VOUT= -7V -100 1 2 1.5 1.5 2.7
VCC VCC VCC VCC 0.2 3 0.2 250 125
V
V
V V V mA
Output Leakage Current (Full-duplex versions, Y & Z pins) Note 2
RE=0, VCC=0 or 5.5V
A
Receiver Receiver Input Resistance -7V VCM 12V DE=0, RE=0, Vcc=0 or 5.5V VIN= 12V VIN= -7V -100 -200 -125 25 IOUT = -8mA, VID = -40mV IOUT = 8mA, VID = -200mV VCC =5.5V, 0 VOUT VCC 0V VRO VCC Vcc-1.5 0.4 1 95 A mA -40 96 125 A mV mV V K
Input Current (A, B pins)
Receiver Differential Threshold (VA-VB) Receiver Input Hysteresis Receiver Output Voltage VOH VOL
-7V VCM 12V
High-Z Receiver Output Current Receiver Output Short Circuit Current Supply and Protection Supply Current IQ, Active Mode Shutdown Mode
No load, DI=0 or VCC DE=0, RE=Vcc, DI=VCC Junction temperature
400
900 1
A A
o
Thermal Shutdown Temperature Thermal Shutdown Hysteresis
165 15
C
Notes: 1. Change in Magnitude of Differential Output Voltage and Change in Magnitude of Common Mode Output Voltage are the changes in output voltage when DI input changes state. 2. Except devices which don't have DE or RE inputs. 3. The transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns the device does not enter shutdown. If the enable inputs are held in this state for at least 600ns the device is assured to be in shutdown. In this low power mode most circuitry is disabled and supply current is typically 1nA. 4.Characterized, not 100% tested.
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
5
TIMING CHARACTERISTICS
Unless otherwise noted Vcc= +5.00.5V, ambient temperature TA from -40 to +85C
SP3080E, SP3081E, SP3082E DRIVER CHARACTERISTICS: Data Signaling Rate (1 / tUI) Driver Propagation Delay (tPHL, tPLH) Driver Output Rise/Fall Time (tR, tF) Driver Differential Skew (tPLH - tPHL) Driver Enable to Output High (tDZH) Driver Enable to Output Low (tDZL) Driver Disable from Output High (tDHZ) Driver Disable from Output Low (tDLZ) Shutdown to Driver Output Valid (tDZV) SP3083E, SP3084E, SP3085E DRIVER CHARACTERISTICS: Data Signaling Rate (1/ tUI) Driver Propagation Delay (tPHL, tPLH) Driver Output Rise/Fall Time (tR, tF) Driver Differential Skew (tPLH - tPHL) Driver Enable to Output High (tDZH) Driver Enable to Output Low (tDZL) Driver Disable from Output High (tDHZ) Driver Disable from Output Low (tDLZ) Shutdown to Driver Output Valid (tDZV) SP3086E, SP3087E, SP3088E DRIVER CHARACTERISTICS: Data Signaling Rate (1 / tUI) Driver Propagation Delay (tPHL, tPLH) Driver Output Rise/Fall Time (tR, tF) Driver Differential Skew (tPLH - tPHL) Driver Enable to Output High (tDZH) Driver Enable to Output Low (tDZL) Driver Disable from Output High (tDHZ) Driver Disable from Output Low (tDLZ) Shutdown to Driver Output Valid (tDZZV) Receiver CHARACTERISTICS: Receiver Prop. Delay SP3080E - SP3085E Receiver Prop. Delay SP3086E - SP3088E Prop. Delay Skew SP3080E-SP3085E Prop. Delay Skew SP3086E-SP3088E Receiver Output Rise/Fall Time Receiver Enable to Output High (tZH) Receiver Enable to Output Low (tZL) Receiver Disable from High (tHZ) Receiver Disable from Low (tLZ) Shutdown to Receiver Output Valid (tROV) Time to Shutdown ((Note 2,3,4)
Rev M 2/22/2007 SP3080E-3088E Advanced RS485 Transceivers
Conditions Duty Cycle 40 to 60% RL = 54, CL = 50pF,
Min. Typ. Max. Unit 115 500 2600 200 667 1200 2500 Kbps ns ns ns ns ns ns ns ns
SP3080E, SP3081E
3500 3500 100 100 6000
Conditions Duty Cycle 40 to 60% RL = 54, CL = 50pF,
Min. Typ. Max. Unit 500 250 200 530 1000 750 100 2500 2500 100 100 4500 Kbps ns ns ns ns ns ns ns ns
SP3083E, SP3084E
Conditions Duty Cycle 40 to 60% RL = 54, CL = 50pF,
Min. Typ. Max. Unit 20 12 6 20 10 5 150 150 50 50 250 Mbps ns ns ns ns ns ns ns ns
SP3086E, SP3087E
Conditions CL = 15pF, VID = 2V,
Min. Typ. Max. Unit 75 200 75 30 5 ns ns ns ns ns ns ns ns ns ns ns
CL = 15pf
15 50 50 50 50 3500 50 200 600
(c) Copyright 2007 Sipex Corporation
6
TYPICAL PERFORMANCE CHARACTERISTICS
350 325
DE = Vcc
700
No-Load Supply Current (A)
650
275 250 225 No-Load Supply Current (uA) 200 -60 -40 -20 0 20
Shutdown Current (A)
60 80 100
300
DE = GND
600
Shutdown Current (nA) 550
40
500 -60 -40 -20 0 20 40 60 80 100 Temperature (C)
Temperature (C)
No-load Supply Current vs Temperature
Shutdown Current vs Temperature
1000 No Load VCC=5V TA=25C 50% Square wave input
1000 No Load VCC=5V TA=25C 50% Square wave input Driver and Receiver 10
100
100
Supply Current (mA)
Driver and Receiver 10
Supply Current (mA) 1
Receiver Only
Supply Current (mA)
Supply Current (mA) 1 Receiver Only
0.1 1 10 Signaling Rate (kbps) 100 1000
0.1 1 10 Signaling Rate (kbps) 100 1000
Supply Current vs Signaling Rate (SP3080-SP3082)
Supply Current vs Signaling Rate (SP3083-SP3085)
100 No Load VCC=5V TA=25C 50% Square wave input
100 90 80
Supply Current (mA)
Output Current (mA)
10000 100000
10 Driver and Receiver
70 60 50 40
1 Supply Current (mA) Receiver Only
Output Current (mA) 30 20 10
0.1 1 10 100 1000 Signaling Rate (kbps)
0 0 1 2 3 4 5 6 Output Low Voltage (V)
Supply Current vs Signaling Rate (SP3086-SP3088)
Output Current vs Driver Output Low Voltage
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
7
TYPICAL PERFORMANCE CHARACTERISTICS
-120
100
-100
Output Current (mA)
-80
-60
Output Current (mA)
10
1
-40 Output Current (mA) -20
Output Current (mA) 0.1
0 -2 -1 0 1 2 3 4 5 6 Output High Voltage (V)
0.01 0 1 2 3 4 5 6 Differential Output Voltage (V)
Output Current vs Driver Output High Voltage
0.35
Driver Output Current vs Differential Output Voltage
3.4 3.2
IOUT=8mA, V ID=-200mV
RL=100 RL
0.3
Output-Low Voltage (V)
Output Voltage (V)
3 2.8 2.6
0.25
Output Voltage (V) 2.4 2.2 2 -60 -40 -20 0 20 Temperature (C)
RL=54 RL
0.2
Output Low Voltage (V) 0.15
0.1
40 60 80 100
-60
-40
-20
0
20
40
60
80
100
Temperature (C)
Driver Differential Output Voltage vs Temperature
Receiver Output Low Voltage vs Temperature
4 IOUT=8mA, V ID=-40mV 3.9
5
VCC=5V
Receiver Output Voltage (V)
TA=25C
4
Output-Low Voltage (V)
3.8
3
3.7 Output High Voltage (V) 3.6
2
Receiver Output Voltage (V) 1
3.5 -60 -40 -20 0 20 40 60 80 100 Temperature (C)
0 -200
-180
-160
-140
-120
-100
-80
-60
-40
Differential Input Voltage (mV)
Receiver Output High Voltage vs Temperature
Receiver Output Voltage vs Differential Input Voltage
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
8
TYPICAL PERFORMANCE CHARACTERISTICS
60
35 30 25
50
Output Current (mA)
Output Current (mA)
40
20 15 Output Current (mA) 10 5 0
30
20 Output Current (mA)
10
0 0 1 2 3 Output Low Voltage (V) 4 5
0
1
2 3 Output High Voltage (V)
4
5
Output Current vs Receiver Low Voltage
Output Current vs Receiver Output High Voltage
435
RL=54, CL=50pF R =50pF
L L
960 950
=50pF RRL=54, C=50pF L LL
430
Propagation Delay (ns)
940 930 920 910 900
Propagation Delay (ns)
425
420
Propagation Delay (ns) 415
Propagation Delay (ns) 890 880
410 -60 -40 -20 0 20 Temperature (C) 40 60 80 100
870 -60 -40 -20 0 20 Temperature (C) 40 60 80 100
Driver Average Propagation Delay vs Temperature (SP3083-SP3085)
Driver Average Propagation Delay vs Temperature (SP3080-SP3082)
960 950 RRL=54, CL=50pF L L=50pF
Propagation Delay (ns)
940 930 920 910 900 tPHL tPLH
Propagation Delay (ns) 890 880 870 -60 -40 -20 0
20 Temperature (C)
40
60
80
100
Driver Proagation Delay vs Temerature (SP3080-SP3082)
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
9
TYPICAL PERFORMANCE CHARACTERISTICS
460
RL=54, CL=50pF R =50pF
L L
13.5
RL=54, CL=50pF RL=54, CL=50pF R =50pF
L L
450
13
Propagation Delay (ns) (ns) Propagation Delay
440
Propagation Delay (ns) Propagation Delay (ns)
20 40 60 80 100
tPLH
12.5
430
12
420
11.5
Propagation Delay (ns) 410
Propagation Delay (ns) 11 10.5
tPHL
400
390 -60 -40 -20 0 Temperature (C)
10 -60 -40 -20 0 20 Temperature (C) 40 60 80 100
Driver Propagation Delay vs Temperature (SP3083-SP3085)
Driver Average Propagation Delay vs Temperature (SP3086-SP3088)
15 14
Propagation Delay (ns)
RL=54, CL=50pF R =50pF
L L
120
CL=15pF, V ID=2V
110
tPLH
12 11
Propagation Delay (ns)
13
100
tPHL
90
10 Propagation Delay (ns) 9 8 -60 -40 -20 0 20 40 60 80 100 Temperature (C)
Propagation Delay (ns) 80
70 -60 -40 -20 0 20 Temperature (C) 40 60 80 100
Driver Propagation Delay vs Temperature (SP3086-SP3088)
Receiver Average Propagation Delay vs Temperature (SP3080-SP3082)
120 CL=15pF, V ID=2V
155 150
C L=15pF, V ID =2V
Propagation Delay (ns) Propagation Delay (ns)
110
100
Propagation Delay (ns)
145 140 135 130
tPHL
tPHL
90 tPLH
Propagation Delay (ns) 80
Propagation Delay (ns) 125 120
tPLH
70 -60 -40 -20 0 20 40 60 80 100 Temperature (C)
115 -60 -40 -20 0 20 Temperature (C) 40 60 80 100
Receiver Propagation Delay vs Temperature (SP3080-SP3082)
Receiver Propagation Delay vs Temperature (SP3083-SP3085)
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
10
TYPICAL PERFORMANCE CHARACTERISTICS
55 53
C L=15pF, V ID =2V
Propagation Delay (ns)
51 49 47 45 43
tPHL
41 Propagation Delay (ns) 39 37 35 -60 -40 -20
tPLH
0
20 Temperature (C)
40
60
80
100
Receiver Propagation Delay vs Temperature (SP3086-SP3088)
Driver and Receiver Hot Swap Performance vs. Vcc
Driver Propagation Delay (SP3080-SP3082)
Driver output Waveform Low to High (SP3080-SP3082)
54 52
C L=15pF, V ID =2V
Propagation Delay (ns)
50 48 46
44 Propagation Delay (ns) 42 40 -60 -40 -20 0 20 Temperature (C) 40 60 80 100
Receiver Average Propagation Delay vs Temperature (SP3086-SP3088)
Driver output Waveform High to Low (SP3080-SP3082)
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
11
TYPICAL PERFORMANCE CHARACTERISTICS
Driver and Receiver Waveform High to Low (SP3080-SP3082)
Driver Propagation Delay (SP3083-SP3085)
Driver Output Waveform Low to High (SP3083-SP3085)
Driver Output Waveform High to Low (SP3083-SP3085)
Driver and Receiver Waveform Low to High (SP3080-SP3082)
Rev M 2/22/2007
Driver and Receiver Waveform Low to High (SP3083-SP3085)
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
12
TYPICAL PERFORMANCE CHARACTERISTICS
Driver Propagation Delay (SP3086-SP3088)
Driver Output Waveform Low to High (SP3086-SP3088)
Driver Output Waveforms High to Low (SP3086-SP3088)
Driver and Receiver Waveform Low to High (SP3086-SP3088)
Driver and Receiver Waveform High to Low (SP3083-SP3085)
Rev M 2/22/2007
Driver and Receiver Waveform High to Low (SP3086-SP3088)
(c) Copyright 2007 Sipex Corporation
SP3080E-3088E Advanced RS485 Transceivers
13
TYPICAL PERFORMANCE CHARACTERISTICS
Receiver Propagation Delay (SP3086-SP3088)
Receiver Propagation Delay (SP3080-SP3082)
Receiver Propagation Delay (SP3083-SP3085)
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
14
DESCRIPTION
Driver DC Test Circuit
Receiver DC Test Circuit
Driver Propagation Delay Time Test Circuit and Timing Diagram
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
15
DESCRIPTION Driver Differential Output Test Circuit
DE= 3V A/Y DI= 0 or VCC D B/Z 375 VOD 60 VCM 375
Driver Enable and Disable Times Test Circuit and Timing Diagram
Y 0 or VCC DI D Z
S1 OUT CL=50pF RL= 500
GENERATOR
50
VCC VCC /2
DE
tZL, tZL(SHDN) 0.25V tLZ
0
VOM = (VOL + VCC)/2
OUT
0
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
16
DESCRIPTION Driver Enable and Disable Times Test Circuit and Timing Diagram
VCC Y 0 OR VCC DI D Z
GENERATOR
S1
RL=500 OUT CL=50pF
50
VCC VCC/2 DE VCC OUT VOM = (VOL+ VCC)/2 VOL tZL, tZL(SHDN) tLZ 0.25V 0
Receiver Propagation Delay Test Circuit and Timing Diagram
A
VID
OUT B R
RE
CL 15pF
A B tPHL 1.5V OUT tPLH
+1V -1V VOH VOL
SP3080E-3088E Advanced RS485 Transceivers (c) Copyright 2007 Sipex Corporation
Rev M 2/22/2007
17
DESCRIPTION Receiver Enable and Disable Times Test Circuit
1.5V -1.5V S3 B A RE
GENERATOR
1K
S1 S2
VCC
CL=15pF
50
Receiver Enable and DisableTiming Diagram
S1 is open, S2 is closed, S3=1.5V 3V
RE
S1 is closed, S2 is open, S3= -1.5V
3V
RE
1.5V tZH, tZH(SHDN) VOH
1.5V tZL, tZL(SHDN)
0V
OUT
VOH/2 0V
VCC OUT VOL = VCC/2 VOL
S1 is open, S2 is closed, S3=1.5V
S1 is closed, S2 is open, S3= -1.5V 3V
RE
1.5V
3V
RE
1.5V tLZ 0V VCC
0.25V VOH OUT 0V
OUT
0.25V
VOL
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
18
FUNCTION TABLES
SP3080E, SP3083E, SP3086E (Full Duplex)
Transmitting Inputs RE X X 0 1 DE 1 1 0 0 DI 1 0 X X Y 1 0 High-Z Shutdown Outputs Z 0 1 RE 0 0 0 1 1 DE X X X 1 0 Receiving Inputs VA - VB -40mV -200mV Open/shorted X X Output RO 1 0 1 High-Z Shutdown
SP3081E SP3084E, SP3087E (Full Duplex)
Transmitting Input DI 1 0 Open Y 1 0 1 Outputs Z 0 1 0 Inputs VA - VB -40mV -200mV Open/shorted Receiving Output RO 1 0 1
SP3082E SP3085E, SP3088E (Half Duplex)
Transmitting RE X X 0 1 Inputs DE 1 1 0 0 Outputs DI 1 0 X X A 1 0 High-Z Shutdown B 0 1 RE 0 0 0 1 1 DE X X X 1 0 Receiving Inputs VA - VB -40mV -200mV Open/shorted X X Output RO 1 0 1 High-Z Shutdown
Note: Receiver inputs -200mV < VA - VB < -40mV, should be considered indeterminate
PRODUCT SELECTOR GUIDE
Part Number SP3080E SP3081E SP3082E SP3083E SP3084E SP3085E SP3086E SP3087E SP3088E Duplex Full Full Half Full Full Half Full Full Half Data Rate (Mbps) 0.115 0.115 0.115 0.5 0.5 0.5 20 20 20 Shut-down Yes No Yes Yes No Yes Yes No Yes Receiver & Trans on Bus Foot-print Driver Enable Yes No Yes Yes No Yes Yes No Yes 256 256 256 256 256 256 256 256 256 SN75180 SN75179 SN75176 SN75180 SN75179 SN75176 SN75180 SN75179 SN75176 pin-compatible upgrade from: MAX3080 MAX3081 SP483, MAX3082 MAX3083 MAX3084 MAX3085 SP1491, MAX3086 SP1490, MAX3087 SP1481, MAX3088
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
(c) Copyright 2007 Sipex Corporation
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DETAILED DESCRIPTION SP3080E-SP3088E is a family of advanced RS-485/RS-422 transceivers. Each contains one driver and one receiver. These devices feature fail-safe circuitry that guarantees a logic-high receiver output when the receiver inputs are open or shorted, or when they are connected to a terminated transmission line with all drivers disabled. SP3080E, SP3082E, SP3083E, SP3085E, SP3086E and SP3088E also feature a hot-swap capability allowing live insertion without error data transfer. The SP3080E, SP3081E and SP3082E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 115kbps. The SP3083E, SP3084E and SP3085E also offer slew-rate limits allowing transmit speeds up to 500kbps. The SP3086E, SP3087E, SP3088E driver slew rates are not limited, making transmit speeds up to 20Mbps possible. The SP3082E, SP3085E and SP3088E are half-duplex transceivers, while the SP3080E, SP3081E, SP3083E, SP3084E, SP3086E, and SP3087E are full duplex transceivers. All devices operate from a single 5.0V supply. Drivers are output short-circuit current limited. Thermal-shutdown circuitry protects drivers against excessive power dissipation. When activated, the thermal-shutdown circuitry places the driver outputs into a high-impedance state. RECEIVER INPUT FILTERING SP3080E-SP3085E receivers incorporate input filtering in addition to input hysteresis. This filtering enhances noise immunity with differential signals that have very slow rise and fall times. Receiver propagation delay increases due to this filtering. ADVANCED FAIL SAFE Ordinary RS485 differential receivers will be in an indeterminate state whenever A - B is less than 200mV. This situation can occur whenever the data bus is not being actively driven. The Advanced Failsafe feature of the SP3080E family guarantees a logic-high receiver output if the receiver's differential inputs are shorted, open-circuit, or if they are shunted by a termination resistor.
Rev M 2/22/2007
DESCRIPTION
The receiver thresholds of the SP3080E family, are very precise and offset by at least a 40mV noise margin from ground. This results in a logic-high receiver output at zero volts input differential while maintaining compliance with the EIA/TIA-485 standard of 200mV. HOT-SWAP CAPABILITY When a micro-processor or other logic device undergoes its power-up sequence its logicoutputs are typically at high impedance. In this state they are unable to drive the DE and signals to a defined logic level. During this period, noise, parasitic coupling or leakage from other devices could cause standard CMOS enable inputs to drift to an incorrect logic level. If circuit boards are inserted into an energized backplane (commonly called "live insertion" or "hot-swap") power may be suddenly applied to all circuits. Without the hot-swap capability, this situation could improperly enable the transceiver's driver or receiver, driving invalid data onto shared busses and possibly causing driver contention or device damage. The SP3080E family contains a special poweron-reset circuit that holds DE low and RE high for approximately 10 microseconds. After this initial power-up sequence the hot-swap circuit becomes transparent, allowing for normal, unskewed enable and disable timings. 15KV ESD PROTECTION ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The driver output and receiver inputs of the SP3080E family have extra protection against static electricity. Sipex uses state of the art structures to protect these pins against ESD of 15kV without damage. The ESD structures withstand high ESD in all states: normal operation, shutdown, and powered down. After an ESD event, the SP3080E - SP3088E keeps working without latch-up or damage. ESD protection can be tested in various ways. The transmitter outputs and receiver inputs of
SP3080E-3088E Advanced RS485 Transceivers
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the SP3080E - SP3088E are characterized for protection to the following limits: 15kV using the Human Body Model 8kV using the Contact Discharge method specified in IEC 1000-4-2 15kV Air-gap ESD TEST CONDITIONS ESD performance depends on a variety of conditions. Contact Sipex for a reliability report that documents test setup, methodology and results. IEC 1000-4-2 The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment. However, it does not specifically refer to integrated circuits. The SP3080E family helps you design equipment to meet IEC 1000-4-2, without sacrificing board space and cost for external ESDprotection components. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is a higher peak current in IEC 1000-4-2 series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 1000-4-2 is generally lower than that measured using the human body model. The air-gap test involves approaching the device with a charged probe. The contact discharge method connects the probe to the device before the probe is energized. MACHINE MODEL The machine model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. The objective is to emulate the stress caused when I/O pins are contacted by handling equipment during test and assembly. 256 TRANSCEIVERS ON THE BUS The standard RS-485 receiver input impedance is 12k (1 unit load). A standard driver can drive up to 32 unit loads. The SP3080E family of transceivers has only a 1/8th unit load receiver input impedance (96k), thereby allowing eight times as many, up to 256, transceivers to be connected in parallel on a communication line. Any combination of these devices and other RS-485 transceivers up to a total of 32 unit loads may be connected to the line.
LOW POWER SHUTDOWN MODE Low-power shutdown mode is initiated by bringing both RE high and DE low simultaneously. While in shutdown devices typically draw only 50nA of supply current. DE and RE may be tied together and driven by a single control signal. Devices are guaranteed not to enter shutdown if RE is high and DE is low for less than 50ns. If the inputs are in this state for at least 600ns, the parts are shutdown. Enable times tZH and tZL apply when the part is not in low-power shutdown state. Enable times tZH(SHDN) and tZL(SHDN) apply when the parts are shut down. The drivers and receivers take longer to become enabled from low power shutdown mode tZL(SHDN) and tZL(SHDN) than from driver/receiver-disable mode (tZH, tZL). DRIVER OUTPUT PROTECTION Two mechanisms prevent excessive output current and power dissipation caused by faults or by bus contention. First, a driver-current limit on the output stage provides immediate protection against short circuits over the whole common-mode voltage range. Second, a thermalshutdown circuit forces the driver outputs into a high-impedance state if junction temperature becomes excessive. LINE LENGTH, EMI, AND REFLECTIONS SP3080E - SP3085E feature controlled slewrate drivers that minimize EMI and reduce reflections caused by improperly terminated cables. SP3080E - SP3083E driver rise and fall times are limited to no faster than 667ns, allowing error-free data transmission up to 115kbps. The SP3083, SP3084 and SP3085 offer somewhat higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. The RS-485/RS-422 standard covers line lengths up to 4,000ft. Maximum achievable line length is a function of signal attenuation and noise. Use of slew-controlled drivers such as the SP3080E-SP3086E may help to reduce crosstalk interference and permit communication over longer transmission lines.
DESCRIPTION
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
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Termination prevents reflections by eliminating the impedance mismatches on a transmission line. Line termination is typically used if rise and fall times are shorter than the round-trip signal propagation time. Slew-limited drivers may reduce or eliminate the need for cable termination in many applications.
DESCRIPTION
TYPICAL APPLICATIONS: Half-Duplex Network H alf -D uplex N etw ork
Bi-Directional Full-Duplex Network Bi-Directional Full-Duplex Network
Point to Multi-Point Repeater Point to Multi -point with Repeater
Repeater Repeater (optional) (optional)
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SP3080E-3088E Advanced RS485 Transceivers
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ORDERING INFORMATION Part number LEAD FREE Tape & Reel SP3080EEN SP3081EEN SP3082EEN SP3083EEN SP3084EEN SP3085EEN SP3086EEN SP3087EEN SP3088EEN -L -L -L -L -L -L -L -L -L /TR /TR /TR /TR /TR /TR /TR /TR /TR Temperature range From -40 to +850C From -40 to +85 C
0
Package Type 14 pin nSOIC 8 pin nSOIC 8 pin nSOIC 14 pin nSOIC 8 pin nSOIC 8 pin nSOIC 14 pin nSOIC 8 pin nSOIC 8 pin nSOIC
From -40 to +850C From -40 to +85 C
0 0 0 0
From -40 to +85 C From -40 to +85 C From -40 to +85 C From -40 to +850C From -40 to +85 C
0
All packages are available as lead free (RoHS compliant). To order add "-L" suffix to part number. For Tape and Reel add "/TR". Reel quantity is 2,500 for NSOIC. Example: SP3082EEN-L/TR = lead free and Tape and Reel. SP3082EEN/TR = standard with Tape and Reel.
Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600
Solved by Sipex
TM
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Rev M 2/22/2007 SP3080E-3088E Advanced RS485 Transceivers (c) Copyright 2007 Sipex Corporation
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