SN54HC623_16 Datasheet, PDF (1/15 Pages) Texas Instruments – OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

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 I_CC
D Typical t_pd = 8 ns
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
D Lock Bus-Latch Capability
D True Logic
description/ordering information
These octal bus transceivers are designed for
asynchronous two-way communication between
data buses. The control-function implementation
allows for maximum flexibility in timing.
The ’HC623 devices allow 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
output-enable (OEAB and OEBA) inputs.
OEAB and OEBA disable the device so that the
buses are effectively isolated. The dual-enable
configuration gives the transceivers the capability
to store data by simultaneously enabling OEAB
and OEBA. Each output reinforces its input in this
transceiver configuration. When both OEAB and
OEBA are enabled and all other data sources to
the two sets of bus lines are in the high-impedance
state, both sets of bus lines (16 total) remain at
their last states. The 8-bit codes appearing on the
two sets of buses are identical.
SN54HC623, SN74HC623
OCTAL BUS TRANSCEIVERS
WITH 3ĆSTATE OUTPUTS
SCLS149C – DECEMBER 1982 – REVISED DECEMBER 2002
SN54HC623 . . . J OR W PACKAGE
SN74HC623 . . . DW, N, OR NS PACKAGE
(TOP VIEW)
OEAB ₁
A1 ₂
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
20 ^V_CC
19 ^OEBA
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
SN54HC623 . . . FK PACKAGE
(TOP VIEW)
A3
3 2 1 20 19
4
18
B1
A4 5
17 B2
A5 6
16 B3
A6 7
15 B4
A7 8
14 B5
9 10 11 12 13
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP – N
Tube
SN74HC623N
SN74HC623N
–40°C to 85°C SOIC – DW
Tube
Tape and reel
SN74HC623DW
SN74HC623DWR
HC623
SOP – NS
Tape and reel SN74HC623NSR
HC623
CDIP – J
Tube
SNJ54HC623J
SNJ54HC623J
–55°C to 125°C CFP – W
Tube
SNJ54HC623W
SNJ54HC623W
LCCC – FK
Tube
SNJ54HC623FK
SNJ54HC623FK
† _{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  2002, Texas Instruments Incorporated
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