SN54HCT645_07 Datasheet, PDF (1/15 Pages) Texas Instruments – OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

D Operating Voltage Range of 4.5 V to 5.5 V
D High-Current 3-State Outputs Can Drive Up
To 15 LSTTL Loads
D Low Power Consumption, 80-µA Max I_CC
D Typical t_pd = 14 ns
SN54HCT645 . . . J OR W PACKAGE
SN74HCT645 . . . DW, N, NS, OR PW PACKAGE
(TOP VIEW)
SN54HCT645, SN74HCT645
OCTAL BUS TRANSCEIVERS
WITH 3ĆSTATE OUTPUTS
SCLS019D − MARCH 1984 − REVISED AUGUST 2003
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
D Inputs Are TTL-Voltage Compatible
D True Logic
SN54HCT645 . . . FK PACKAGE
(TOP VIEW)
DIR 1
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
20 V_CC
19 OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
3 2 1 20 19
A3 ₄
18 ^B1
A4 ₅
17 B2
A5 6
16 B3
A6 7
15 B4
A7 8
14 B5
9 10 11 12 13
description/ordering information
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.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N
Tube of 20
SN74HCT645N
SN74HCT645N
SOIC − DW
Tube of 25
Reel of 2000
SN74HCT645DW
SN74HCT645DWR
HCT645
−40°C to 85°C SOP − NS
Reel of 2000
Tube of 70
SN74HCT645NSR
SN74HCT645PW
HCT645
TSSOP − PW
Reel of 2000
Reel of 250
SN74HCT645PWR
SN74HCT645PWT
HT645
CDIP − J
Tube of 20
SNJ54HCT645J
SNJ54HCT645J
−55°C to 125°C CFP − W
Tube of 85
SNJ54HCT645W
SNJ54HCT645W
LCCC − FK
Tube of 55
SNJ54HCT645FK
SNJ54HCT645FK
† _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are}
available at www.ti.com/sc/package.
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.
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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.
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Copyright  2003, Texas Instruments Incorporated
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