D Wide Operating Voltage Range of 2 V to 6 V
D High-Current 3-State Outputs Can Drive Up
To 15 LSTTL Loads
D Low Power Consumption, 80-µA Max ICC
SN54HC645 . . . J OR W PACKAGE
SN74HC645 . . . DW, N, OR NS PACKAGE
OCTAL BUS TRANSCEIVERS
WITH 3ĆSTATE OUTPUTS
SCLS304B – JANUARY 1996 – REVISED DECEMBER 2002
D Typical tpd = 12 ns
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
D True Logic
SN54HC645 . . . FK PACKAGE
3 2 1 20 19
9 10 11 12 13
These octal bus transceivers are designed for asynchronous two-way communication between data buses.
These devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending upon the
level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the
buses are effectively isolated.
PDIP – N
–40°C to 85°C SOIC – DW
Tape and reel
SOP – NS
Tape and reel SN74HC645NSR
CDIP – J
–55°C to 125°C CFP – W
LCCC – FK
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
L L B data to A bus
L H A data to B bus
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
•POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2002, Texas Instruments Incorporated
On products compliant to MILĆPRFĆ38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.