Octal Bus Transceiver
TECHNICAL DATA
Octal 3-State Inverting Bus Transceiver
High-Speed Silicon-Gate CMOS
The IN74ACT640 is identical in pino...
Description
TECHNICAL DATA
Octal 3-State Inverting Bus Transceiver
High-Speed Silicon-Gate CMOS
The IN74ACT640 is identical in pinout to the LS/ALS640, HC/HCT640. The IN74ACT640 may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs. The IN74ACT640 is a 3-state transceiver that is used for 2-way asynchronous communication between data buses. The device has an active-low Output Enable pin, which is used to place the I/O ports into high-impedance states. The Direction control determines whether data flows from A to B or from B to A. TTL/NMOS Compatible Input Levels Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 4.5 to 5.5 V Low Input Current: 1.0 µA; 0.1 µA @ 25°C Outputs Source/Sink 24 mA
IN74ACT640
ORDERING INFORMATION IN74ACT640N Plastic IN74ACT640DW SOIC TA = -40° to 85° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Control Inputs Output Enable L Direction L Operation Data Transmitted from Bus B to Bus A (inverted) Data Transmitted from Bus A to Bus B (inverted) Buses Isolated (High Impedance State)
w
w
w
.d
e e h s a t a
. u t4
m o c
L
H
PIN 20=VCC PIN 10 = GND H X
X = don’t care
1
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IN74ACT640
MAXIMUM RATINGS*
Symbol VCC VIN VOUT IIN IOUT ICC PD Tstg TL
*
Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) DC Output Voltage (Referenced to GND) DC Input Current, per Pin DC Output Sink/Source Current, per Pin DC Supply C...
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