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HD74HCT620, HD74HCT623
Octal Bus Transceivers (with inverted 3-state outputs) Octal Bus Transceivers (with 3-state outputs)
REJ03D0671-0200 (Previous ADE-205-561) Rev.2.00 Mar 30, 2006
Description
This octal bus transceiver is designed for asynchronous two-way communication between data buses. The control function implementation allows for maximum flexibility in timing. This device allows data transmission from the A bus to the B bus or from the B bus to the A bus depending upon the logic levels at the enable inputs (GBA and GAB). The enable inputs can be used to disable the device so that the buses are effectively isolated. The dual-enable configuration gives these devices the capability to store data by simultaneous enabling of GBA and GAB. Each output reinforces its input in this transceiver configuration. Thus, when both control inputs are enabled and all other data sources to the two sets of bus lines are at high impedance, both sets of bus lines (16 in all) will remain at their last states. The 8-bit codes appearing on the two sets of buses will be identical for the HD74HCT623 or complementary for the HD74HCT620.
Features
* * * * * * * LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility High Speed Operation: tpd (Bus to Bus) = 15 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads (QA to QH outputs) Wide Operating Voltage: VCC = 4.5 to 5.5 V Low Input Current: 1 A max Low Quiescent Supply Current: ICC (static) = 4 A max (Ta = 25C) Ordering Information
Part Name HD74HCT623FPEL HD74HCT620RPEL HD74HCT623RPEL Package Type SOP-20 pin (JEITA) SOP-20 pin (JEDEC) Package Code (Previous Code) PRSP0020DD-B (FP-20DAV) PRSP0020DC-A (FP-20DBV) Package Abbreviation FP RP Taping Abbreviation (Quantity) EL (2,000 pcs/reel) EL (1,000 pcs/reel)
Note: Please consult the sales office for the above package availability.
Function Table
Enable Inputs GBA L H H L GAB L H L H Operation HD74HCT620 HD74HCT623 B data to A bus B data to A bus A data to B bus A data to B bus Isolation Isolation B data to A bus, A data to B bus B data to A bus, A data to B bus
Rev.2.00 Mar 30, 2006 page 1 of 8
HD74HCT620, HD74HCT623
Pin Arrangement
Enable GAB A1 A2 A3 A4 A5 A6 A7 A8 1 2 3 4 5 6 7 8 9 20 VCC 19 Enable GBA 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8 (Top view)
GND 10
Logic Diagram
HD74HCT620
GAB GBA VCC A1 VCC B1
A2 A3 A4 A5 A6 A7 A8
B2 B3 B4 B5 B6 B7 B8
Rev.2.00 Mar 30, 2006 page 2 of 8
HD74HCT620, HD74HCT623 HD74HCT623
GAB GBA VCC A1 VCC B1
A2 A3 A4 A5 A6 A7 A8
B2 B3 B4 B5 B6 B7 B8
Absolute Maximum Ratings
Item Supply voltage range Input / Output voltage Input / Output diode current Output current VCC, GND current Power dissipation Storage temperature Symbol VCC VIN, VOUT IIK, IOK IOUT ICC or IGND PT Tstg Ratings -0.5 to 7.0 -0.5 to VCC +0.5 20 35 75 500 -65 to +150 Unit V V mA mA mA mW
C
Note: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of which may be realized at the same time.
Recommended Operating Conditions
Item Symbol Ratings Supply voltage VCC 4.5 to 5.5 Input / Output voltage VIN, VOUT 0 to VCC Operating temperature Ta -40 to 85 Input rise / fall time*1 tr, tf 0 to 500 Notes: 1. This item guarantees maximum limit when one input switches. Waveform: Refer to test circuit of switching characteristics. Unit V V Conditions
C
ns VCC = 4.5 V
Rev.2.00 Mar 30, 2006 page 3 of 8
HD74HCT620, HD74HCT623
Electrical Characteristics
Item Input voltage Output voltage Symbol VCC (V) VIH VIL VOH VOL Off-state output current Input current Quiescent supply current IOZ Iin ICC Ta = 25C Min Typ Max 4.5 to 5.5 2.0 -- -- 4.5 to 5.5 -- -- 0.8 4.5 4.4 -- -- 4.5 4.18 -- -- 4.5 -- -- 0.1 4.5 -- -- 0.26 5.5 -- -- 0.5 5.5 5.5 -- -- -- -- 0.1 4.0 Ta = -40 to+85C Min Max 2.0 -- -- 0.8 4.4 -- 4.13 -- -- 0.1 -- 0.33 -- 5.0 -- -- 1.0 40 Unit V V V V A A A Test Conditions
Vin = VIH or VIL IOH = -20 A IOH = -6 mA Vin = VIH or VIL IOL = 20 A IOL = 6 mA Vin = VIH or VIL, Vout = VCC or GND Vin = VCC or GND Vin = VCC or GND, Iout = 0 mA
Switching Characteristics
(CL = 50 pF, Input tr = tf = 6 ns)
Item Propagation delay time Output enable time Output disable time Output rise/fall time Input capacitance Symbol VCC (V) tPLH tPHL tZH tZL tHZ tLZ tTLH tTHL Cin 4.5 4.5 4.5 4.5 4.5 4.5 4.5 -- Ta = 25C Min Typ Max -- 13 20 -- -- -- -- -- -- -- 16 16 16 19 21 4 5 20 30 30 30 30 12 10 Ta = -40 to +85C Min Max -- 25 -- -- -- -- -- -- -- 25 38 38 38 38 15 10 Unit ns ns ns ns pF Test Conditions
Rev.2.00 Mar 30, 2006 page 4 of 8
HD74HCT620, HD74HCT623
Test Circuit
HD74HCT620
VCC VCC
GBA
See Function Table
Input Pulse Generator Zout = 50
Output A1 B1 CL = 50 pF GAB TEST tPLH / tPHL tZH / tHZ tZL / tLZ S2 OPEN GND VCC S1 1 k S2 OPEN GND VCC
Note : 1. CL includes probe and jig capacitance. 2. A2-B2, A3-B3, A4-B4, A5-B5, A6-B6, A7-B7, A8-B8 are identical to above load circuit. 3. S1 is a input / output swich.
HD74HCT623
VCC VCC
GBA
See Function Table
Input Pulse Generator Zout = 50
Output A1 B1 CL = 50 pF GAB TEST tPLH / tPHL tZH / tHZ tZL / tLZ S2 OPEN GND VCC S1 1 k S2 OPEN GND VCC
Note : 1. CL includes probe and jig capacitance. 2. A2-B2, A3-B3, A4-B4, A5-B5, A6-B6, A7-B7, A8-B8 are identical to above load circuit. 3. S1 is a input / output swich.
Rev.2.00 Mar 30, 2006 page 5 of 8
HD74HCT620, HD74HCT623
Waveforms
HD74HCT620
* Waveform - 1
tr 90 % 1.3 V 10 % tPHL 90 % 1.3 V 10 % tTHL 90 % 1.3 V
tf VCC 10 % tPLH 90 % 1.3 V 10 % tTLH 0V
Input A or B
VOH VOL
Output B or A
Notes : 1. Input waveform : PRR 1 MHz, duty cycle 50%, tr 6 ns, tf 6 ns 2. The output are measured one at a time with one transition per measurement.
HD74HCT623
* Waveform - 1
tr 90 % 1.3 V 10 % t PLH 90 % 1.3 V 10 % tTLH 90 % 1.3 V
tf VCC 10 % tPHL 90 % 1.3 V 10 % tTHL 0V
Input A or B
VOH VOL
Output B or A
Notes : 1. Input waveform : PRR 1 MHz, duty cycle 50%, tr 6 ns, tf 6 ns 2. The output are measured one at a time with one transition per measurement.
Rev.2.00 Mar 30, 2006 page 6 of 8
HD74HCT620, HD74HCT623 HD74HCT620, HD74HCT623
* Waveform - 2
tf Enable Input GBA 90 % 1.3 V 10 % tZL Waveform - A 1.3 V tZH Waveform - B 1.3 V tHZ 90 % 10 % tLZ tr 90 % 1.3 V VCC 0V VOH 10 % VOL VOH VOL
* Waveform - 3
tr Enable Input GAB 90 % 1.3 V 10 % tZL Waveform - A 1.3 V tZH Waveform - B 1.3 V tHZ 90 % 90 % 1.3 V 10 % tLZ tf VCC 0V VOH 10 % VOL VOH VOL
Notes : 1. Input waveform : PRR 1 MHz, duty cycle 50%, tr 6 ns, tf 6 ns 2. Waveform- A is for an output with internal conditions such that the output is low except when disabled by the output control. 3. Waveform- B is for an output with internal conditions such that the output is high except when disabled by the output control. 4. The output are measured one at a time with one transition per measurement.
Rev.2.00 Mar 30, 2006 page 7 of 8
HD74HCT620, HD74HCT623
Package Dimensions
JEITA Package Code P-SOP20-7.5x12.8-1.27 RENESAS Code PRSP0020DC-A Previous Code FP-20DBV MASS[Typ.] 0.52g
*1
D
F 11
20
NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" @ DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT @ INCLUDE TRIM OFFSET.
bp
HE E
*2
Index mark
Terminal cross section ( Ni/Pd/Au plating )
1 Z e
*3
c
Reference Dimension in Millimeters Symbol
10 bp x M L1
A1
y
L
Detail F
D E A2 A1 A bp b1 c c1 HE e x y Z L L1
Min Nom Max 12.80 13.2 7.50
0.10 0.20 0.30 2.65 0.34 0.40 0.46 0.20 0.25 0.30 0 8 10.00 10.40 10.65 1.27 0.12 0.15 0.935 0.40 0.70 1.27 1.45
JEITA Package Code P-SOP20-5.5x12.6-1.27
RENESAS Code PRSP0020DD-B
Previous Code FP-20DAV
MASS[Typ.] 0.31g
*1
D 11
A
F
20
NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET.
bp
HE
E
Index mark
*2
Terminal cross section ( Ni/Pd/Au plating )
1 Z e
*3
10 bp x M L1
c
Reference Dimension in Millimeters Symbol
y
A1
L
Detail F
D E A2 A1 A bp b1 c c1 HE e x y Z L L1
Min Nom Max 12.60 13.0 5.50
0.00 0.10 0.20 2.20 0.34 0.40 0.46 0.15 0.20 0.25 0 8 7.50 7.80 8.00 1.27 0.12 0.15 0.80 0.50 0.70 0.90 1.15
Rev.2.00 Mar 30, 2006 page 8 of 8
A
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