KK74AC640 Datasheet, PDF (1/6 Pages) KODENSHI KOREA CORP. – Octal 3-State Inverting Bus Transceiver High-Speed Silicon-Gate CMOS

TECHNICAL DATA
Octal 3-State Inverting
Bus Transceiver
High-Speed Silicon-Gate CMOS
KK74AC640
The KK74AC640 is identical in pinout to the LS/ALS640,
HC/HCT640. The device inputs are compatible with standard CMOS
outputs; with pullup resistors, they are compatible with LS/ALS outputs.
The KK74AC640 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.
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 µA; o.1 µA @ 25°C
• High Noise Immunity Characteristic of CMOS Devices
• Outputs Source/Sink 24 mA
ORDERING INFORMATION
KK74AC640N Plastic
KK74AC640DW SOIC
T_A = -40° to 85° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
PIN 20=V_CC
PIN 10 = GND
FUNCTION TABLE
Control Inputs
Output Direction
Enable
L
L
L
H
H
X
X = don’t care
Operation
Data Transmitted
from Bus B to
Bus A (inverted)
Data Transmitted
from Bus A to
Bus B (inverted)
Buses Isolated
(High Impedance
State)
1