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19-0271; Rev 0; 7/94
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers
_______________General Description
The MAX308/MAX309 precision, monolithic, CMOS analog multiplexers (muxes) offer low on-resistance (less than 100), which is matched to within 5 between channels and remains flat over the specified analog signal range (7 max). They also offer low leakage over temperature (NO-off leakage current less than 5nA at +85C) and fast switching speeds (transition time less than 250ns). The MAX308 is a single-ended 1-of-8 device, and the MAX309 is a differential 2-of-4 device. The MAX308/MAX309 are fabricated with Maxim's improved 44V silicon-gate process. Design improvements yield extremely low charge injection (less than 10pC) and guarantee electrostatic discharge protection greater than 2000V. These muxes operate with a single +4.5V to +30V supply or bipolar 4.5V to 20V supplies, while retaining TTL/CMOS-logic input compatibility and fast switching. CMOS inputs provide reduced input loading. These improved parts are plug-in upgrades for the industrystandard DG408, DG409, DG508A, and DG509A.
____________________________Features
o Guaranteed On-Resistance Match Between Channels, <5 Max o Low On-Resistance, <100 Max o Guaranteed Flat On-Resistance over Specified Signal Range, 7 Max o Guarateed Low Charge Injection, <10pC o NO-Off Leakage Current <5nA at +85C o COM-Off Leakage Current <20nA at +85C o ESD Protection >2000V o Plug-In Upgrade for Industry-Standard DG408/DG409/DG508A/DG509A o Single-Supply Operation (+4.5V to +30V) Bipolar-Supply Operation (4.5V to 20V) o Low Power Consumption, <300W o Rail-to-Rail Signal Handling o TTL/CMOS-Logic Compatible
MAX308/MAX309
______________Ordering Information
PART MAX308CPE MAX308CSE MAX308C/D MAX308EPE MAX308ESE MAX308EJE MAX308MJE TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C PIN-PACKAGE 16 Plastic DIP 16 Narrow SO Dice* 16 Plastic DIP 16 Narrow SO 16 CERDIP 16 CERDIP**
________________________Applications
Sample-and-Hold Circuits Automatic Test Equipment Heads-Up Displays Guidance and Control Systems Military Radios Communications Systems Battery-Operated Systems PBX, PABX Audio Signal Routing
Ordering Information continued at end of data sheet. * Contact factory for dice specifications. ** Contact factory for availability.
_____________________Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
A0 1 EN 2 V- 3 NO1 4 NO2 5 NO3 6 NO4 7 COM 8 16 A1 15 A2 14 GND
NO1 NO2 NO3 NO4 NO5 NO6 NO7 NO8 CMOS DECODE LOGIC COM V+ VGND
MAX308
13 V+ 12 NO5 11 NO6 10 NO7 9 NO8
DIP/SO
Continued at end of data sheet.
A2 A1 A0 EN MAX308 8-CHANNEL SINGLE-ENDED MULTIPLEXER
________________________________________________________________ Maxim Integrated Products
1
Call toll free 1-800-998-8800 for free samples or literature.
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers MAX308/MAX309
ABSOLUTE MAXIMUM RATINGS
Voltage Referenced to VV+ ............................................................................-0.3V, 44V GND .........................................................................-0.3V, 25V Digital Inputs, NO, COM (Note 1)...........(V- - 2V) to (V+ + 2V) or 30mA, (whichever occurs first) Continuous Current (any terminal) ......................................30mA Peak Current, NO or COM (pulsed at 1ms, 10% duty cycle max) ..........................100mA Continuous Power Dissipation (TA = +70C) Plastic DIP (derate 10.53mW/C above +70C) ..........842mW Narrow SO (derate 8.70mW/C above +70C) ............696mW CERDIP (derate 10.00mW/C above +70C) ...............800mW Operating Temperature Ranges MAX30_C_ _ .......................................................0C to +70C MAX30_E_ _.....................................................-40C to +85C MAX30_MJE ..................................................-55C to +125C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
Note 1:
Signals on NO, COM, EN, A0, A1, or A2 exceeding V+ or V- are clamped by internal diodes. Limit forward current to maximum current ratings.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS--Dual Supplies
(V+ = +15V, V- = -15V, GND = 0V, VAH = +2.4V, VAL = +0.8V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SWITCH Analog Signal Range On-Resistance On-Resistance Matching Between Channels On-Resistance Flatness NO-Off Leakage Current (Note 5) VNO, VCOM RON RON RFLAT (Note 3) INO = -1.0mA, VCOM = 10V INO = -1.0mA, VCOM = 10V (Note 4) INO = -1.0mA, VCOM = 5V or 0V VCOM = +10V, VNO = 10V, VEN = 0V VNO = 10V, VCOM = +10V, MAX308 VEN = 0V ICOM(OFF) VNO = +10V, VCOM = 10V, MAX309 VEN = 0V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C COM-On Leakage Current (Note 5) VCOM = 10V, MAX308 VNO = 10V, sequence each switch MAX309 on TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX C, E M C, E M C, E M C, E M C, E M -0.5 -2.5 -5.0 -0.75 -10 -20 -0.75 -5 -10 -0.75 -10 -20 -0.75 -5 -10 0.02 0.02 0.02 0.02 0.01 1.8 1.5 -15 60 15 100 125 5 8 7 10 0.5 2.5 5.0 0.75 10 20 0.75 5 10 0.75 10 20 0.75 5 10 nA nA nA V SYMBOL CONDITIONS MIN TYP MAX (Note 2) UNITS
INO(OFF)
COM-Off Leakage Current (Note 5)
ICOM(ON)
2
_______________________________________________________________________________________
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +15V, V- = -15V, GND = 0V, VAH = +2.4V, VAL = +0.8V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER INPUT Input Current with Input Voltage High Input Current with Input Voltage Low SUPPLY Power-Supply Range VEN = VA = 0V or 4.5V Positive Supply Current I+ VEN = 2.4V, VA(ALL) = 0V or 2.4V VEN = 2.4V, VA(ALL) = 0V or 2.4V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C IAH IAL VA = 2.4V or 15V VEN = 0V or 2.4V, VA = 0V -1.0 -1.0 1.0 1.0 A A SYMBOL CONDITIONS MIN TYP MAX (Note 2) UNITS
MAX308/MAX309
4.5 16 0.075 -1 -10 85 10 40 85
20 30 75 0.5 1 10 175 250 150 225 150 300 10
V A mA A
Negative Supply Current DYNAMIC Transistion Time Break-Before-Make Interval Enable Turn-On Time Enable Turn-Off Time Charge Injection (Note 3) Off Isolation (Note 6)
I-
tTRANS tOPEN tON(EN) tOFF(EN) Q
Figure 2 Figure 4 Figure 3 Figure 3 CL = 1.0nF, VNO = 0V, RS = 0, Figure 5 VEN = 0V, RL = 1k, f = 100kHz, Figure 6 VEN = 2.4V, f = 100kHz, VGEN = 1VP-P, RL = 1k, Figure 7 f = 1MHz f = 1MHz, VEN = VNO = 0V, Figure 8 MAX308
ns ns ns ns pC
2
VISO
TA = +25C
-75
dB
Crosstalk Between Channels
VCT CIN CNO(OFF)
TA = +25C TA = +25C TA = +25C
-92
dB
Logic Input Capacitance NO-Off Capacitance
8 3 26
pF pF
COM-Off Capacitance
CCOM(OFF)
COM-On Capacitance
f = 1MHz, VEN = 0.8V VCOM = 0V, Figure 8 f = 1MHz, VEN = 2.4V CCOM(ON) VCOM = 0V, Figure 8
TA = +25C MAX309 MAX308 TA = +25C MAX309 25 14 37
pF
pF
_______________________________________________________________________________________
3
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers MAX308/MAX309
ELECTRICAL CHARACTERISTICS--Single Supply
(V+ = +12V, V- = 0V, GND = 0V, VAH = +2.4V, VAL = +0.8V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SWITCH Analog Signal Range On-Resistance DYNAMIC Transition Time (Note 3) tTRANS VNO1 = 8V, VNO8 = 0V, VIN = 2.4V, Figure 2 VINH = 2.4V, VINL = 0V, VNO1 = 5V, Figure 3 VINH = 2.4V, VINL = 0V, VNO1 = 5V, Figure 3 CL = 1.0nF, VNO = 0V, RS = 0 TA = +25C 115 450 ns VNO, VCOM RON (Note 3) INO = -1.0mA VCOM = 3V or 10V TA = +25C 0 120 12 175 V SYMBOL CONDITIONS MIN TYP MAX (Note 2) UNITS
Enable Turn-On Time (Note 3)
tON(EN)
TA = +25C
100
600
ns
Enable Turn-Off Time (Note 3) Charge Injection (Note 3)
tOFF(EN)
TA = +25C
75
300
ns
Q
TA = +25C
2
10
pC
Note 2: The algebraic convention where the most negative value is a minimum and the most positive value a maximum is used in this data sheet. Note 3: Guaranteed by design. Note 4: RON = RON(MAX) - RON(MIN). On-resistance match between channels and flatness are guaranteed only with specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured at the extremes of the specified analog signal range. Note 5: Leakage parameters are 100% tested at the maximum rated hot temperature and guaranteed by correlation at +25C. Note 6: Off isolation = 20log VCOM/VNO, where VCOM = output and VNO = input to off switch.
4
_______________________________________________________________________________________
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers
__________________________________________Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
MAX308/MAX309
ON-RESISTANCE vs. VCOM (DUAL SUPPLIES)
MAX308/9 TOC-01
ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES)
MAX308/9 TOC-02
ON-RESISTANCE vs. VCOM (SINGLE SUPPLY)
360 320 280 RON () 5V 240 200 160 120 10V 15V 20V 0 5 10 VCOM (V) 15 20
MAX308/9 TOC-03
160 140 5V 120 100 RON () 80 60 40 15V 20V 20 0 -20 10V
120 100 80 RON () 60 40 20 0
400
V+ = +15V V- = -15V
+125C +85C +25C -55C
80 40 -15 -10 -5 0 VCOM (V) 5 10 15
-15 -10
-5
0
5
10
15
20
VCOM (V)
ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY)
MAX308/9 TOC-04
OFF LEAKAGE vs. TEMPERATURE
MAX308/9 TOC-05
ON LEAKAGE vs. TEMPERATURE
V+ = 15V V- = -15V
MAX308/9 TOC-05
160 140 120 100 RON () 80 60 40 20 0 0
V+ = 15V V- = 0V +125C +85C +25C -55C
1000 100 OFF LEAKAGE (nA) 10 1 0.1 0.01 0.001 0.0001 ICOM (ON) V+ = 15V V- = -15V
1000 100 ON LEAKAGE (nA) 10 1 0.1 0.01
INO (OFF) 0.001 0.0001 -55 -35 -15 5 25 45 65 85 105 125 -55 -35 -15 5
ICOM (ON)
5 VCOM (V)
10
15
25 45
65
85 105 125
TEMPERATURE (C)
TEMPERATURE (C)
CHARGE INJECTION vs. VCOM
MAX308/9 TOC-07
SUPPLY CURRENT vs. TEMPERATURE
I+ 10
MAX308/9 TOC-08
30 20 10 Qj (pC) 0 -10 -20 -30 -15 -10 -5 0 VCOM (V) 5 10 V+ = 12V V- = 0V V+ = +15V V- = -15V
100
I+, I- (A)
1
0.1 I0.01 V+ = +15V V- = -15V VEN = VA = 0V, 4.5V -55 -35 -15 5 25 45 65 85 105 125
0.001 15 TEMPERATURE (C)
_______________________________________________________________________________________
5
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers MAX308/MAX309
______________________________________________________________Pin Description
PIN MAX308 1, 15, 16 -- 2 3 4-7 -- 8 -- 9-12 -- 13 14 MAX309 -- 1, 16 2 3 -- 4-7 -- 8, 9 -- 10-13 14 15 NAME A0, A2, A1 A0, A1 EN VNO1-NO4 NO1A-NO4A COM COMA, COMB NO8-NO5 NO4B-NO1B V+ GND Address Inputs Address Inputs Enable Input Negative Supply Voltage Input Analog Inputs--bidirectional Analog Inputs--bidirectional Analog Output--bidirectional Analog Outputs--bidirectional Analog Inputs--bidirectional Analog Inputs--bidirectional Positive Supply Voltage Input Ground FUNCTION
__________Applications Information
V+
Operation with Supply Voltages Other than 15V
Using supply voltages less than 15V will reduce the analog signal range. The MAX308/MAX309 switches operate with 4.5V to 20V bipolar supplies or with a +4.5V to +30V single supply. Connect V- to GND when operating with a single supply. Both device types can also operate with unbalanced supplies, such as +24V and -5V. The Typical Operating Characteristics graphs show typical on-resistance with 20V, 15V, 10V, and 5V supplies. (Switching times increase by a factor of two or more for operation at 5V.)
NO
COM
Vg
Overvoltage Protection
Proper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings may cause permanent damage to the devices. Always sequence V+ on first, then V-, followed by the logic inputs, NO, or COM. If power-supply sequencing is not possible, add two small signal diodes in series with supply pins for overvoltage protection (Figure 1). Adding diodes reduces the analog signal range to 1V below V+ and 1V above V-, but does not affect the devices' low switch resistance and low leakage characteristics. Device operation is unchanged, and the difference between V+ and V- should not exceed +44V.
6
V-
Figure 1. Overvoltage Protection Using External Blocking Diodes
_______________________________________________________________________________________
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers
______________________________________________Test Circuits/Timing Diagrams
+15V V+ A2 A1 A0 NO1 NO2-NO7 10V
MAX308/MAX309
MAX308
EN GND 50 +15V V+ A1 A0 -15V V-
NO8 COM
+10V VOUT 35pF 300 LOGIC INPUT +3V 50% 0V VNO1 SWITCH OUTPUT VOUT
tr < 20ns tf < 20ns
90%
NO1B NO1A-NO4A
10V
0V 90% VNO8
MAX309
EN GND 50
NO4B COMB V300
+10V VOUT 35pF
tTRANS
ON
tTRANS
-15V
Figure 2. Transition Time
+15V V+ NO1 NO2-NO8 A0 A1 A2 COM 50 GND V1k -15V +15V EN V+ NO1B -5V SWITCH OUTPUT 90% VOUT VOUT 35pF LOGIC INPUT +3V 50% 0V tON(EN) 0V 10% -5V
EN
MAX308
tr < 20ns tf < 20ns tOFF(EN)
A0 A1 50
NO1A-NO4A NO2B-NO4B, COMA
MAX309
GND COMB V1k -15V VOUT 35pF
Figure 3. Enable Switching Time
_______________________________________________________________________________________ 7
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers MAX308/MAX309
_________________________________Test Circuits/Timing Diagrams (continued)
+15V V+ NO1-NO8 A0 A1 A2 GND 50 -15V V300 LOGIC INPUT +3V 50% 0V VOUT 80% COM VOUT 35pF 0V SWITCH OUTPUT tOPEN
+2.4V
EN
tr < 20ns tf < 20ns
+5V
MAX308
Figure 4. Break-Before-Make Interval
+15V RS NO EN VS CHANNEL SELECT A0 A1 A2 COM V+ LOGIC INPUT VOUT VOUT VOUT VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. -15V Q = CL = VOUT +3V OFF 0V ON OFF
MAX308
CL = 1000nF GND V-
Figure 5. Charge Injection
8
_______________________________________________________________________________________
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers
_________________________________Test Circuits/Timing Diagrams (continued)
+15V 10nF VIN NO1 RS = 50 NO8 A0 A1 A2 GND COM VOUT RS = 50 RL = 1k VV+ 10nF
MAX308/MAX309
+15V
VIN
NO1 NO2 NO8
V+
MAX308
COM VOUT RL = 1k EN V-
MAX308
EN
A0 A1 A2 GND
10nF
-15V VOUT VIN
10nF
-15V
OFF ISOLATION = 20log
CROSSTALK = 20log
VOUT VIN
Figure 6. Off Isolation
Figure 7. Crosstalk
+15V V+ A2 CHANNEL SELECT A1 A0 GND EN COM VNO1 Meter Impedance Analyzer or Equivalent f = 1MHz
MAX308
NO8
-15V
Figure 8. NO/COM Capacitance
_______________________________________________________________________________________
9
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers MAX308/MAX309
________Pin Configurations/Functional Diagrams/Truth Tables (continued)
TOP VIEW
V+ VGND
NO1A A0 1 EN 2 V- 3 NO1A 4 NO2A 5 NO3A 6 NO4A 7 COMA 8 16 A1 15 GND 14 V+ NO2A NO3A NO4A NO1B NO2B COMB NO3B NO4B CMOS DECODE LOGIC COMA
MAX309
13 NO1B 12 NO2B 11 NO3B 10 N04B 9 COMB
DIP/SO
A1
A0
EN
MAX309 4-CHANNEL DIFFERENTIAL MULTIPLEXER
A2 X 0 0 0 0 1 1 1 1
A1 X 0 0 1 1 0 0 1 1
A0 X 0 1 0 1 0 1 0 1
EN 0 1 1 1 1 1 1 1 1
ON SWITCH None 1 2 3 4 5 6 7 8 A1 X 0 0 1 1 A0 X 0 1 0 1 EN 0 1 1 1 1 MAX309 LOGIC "0" VAL 0.8V, LOGIC "1" VAH 2.4V ON SWITCH None 1 2 3 4
MAX308 LOGIC "0" VAL 0.8V, LOGIC "1" VAH 2.4V
10
______________________________________________________________________________________
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers
_Ordering Information (continued)
PART MAX309CPE MAX309CSE MAX309C/D MAX309EPE MAX309ESE MAX309EJE MAX309MJE TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C PIN-PACKAGE 16 Plastic DIP 16 Narrow SO Dice* 16 Plastic DIP 16 Narrow SO 16 CERDIP 16 CERDIP**
MAX308/MAX309
* Contact factory for dice specifications. ** Contact factory for availability.
______________________________________________________________________________________
11
Precision, 8-Channel/Dual 4-Channel, High-Performance, CMOS Analog Multiplexers MAX308/MAX309
__________________________________________________________Chip Topographies
MAX308
EN A0 A1 A2 GND EN A0
MAX309
A1 N.C. GND
N.C. VNO1 NO2 V+ NO5 NO6 VNO1A NO2A
N.C. V+ NO1B NO2B
NO3
0.136 (3.45mm) N.C.
NO3A
0.136 (3.45mm) NO3B
NO4
COM NO8
NO7
NO4A
COMA
COMB
NO4B
0.080" (2.03mm)
0.080" (2.03mm)
N.C. = NO INTERNAL CONNECTION
TRANSISTOR COUNT: 122 SUBSTRATE CONNECTED TO V+
TRANSISTOR COUNT: 122 SUBSTRATE CONNECTED TO V+
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 (c) 1994 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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