Texas Instruments SN74BCT623N, SN74BCT623DW, SN74BCT623DWR, SNJ54BCT623W, SNJ54BCT623FK Datasheet
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SN54BCT623, SN74BCT623
OPERATION
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS020A – SEPTEMBER 1988 – REVISED NOVEMBER 1993
• State-of-the-Art BiCMOS Design
Significantly Reduces I
CCZ
• ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (J, N)
description
The ′BCT623 bus transceiver is designed for
asynchronous communication between data
buses. The control function implementation allows
for maximum flexibility in timing. The ′BCT623
provides true data at its outputs.
This device allows 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
The output-enable inputs can be used to disable
the device so that the buses are effectively
isolated. The dual-enable configuration gives the
transceivers the capability of storing data by
simultaneously enabling OEAB and OEBA
output reinforces its input in this configuration.
When both OEAB and OEBA are enabled and all
other data sources to the two sets of bus lines are
at high impedance, both sets of bus lines (16 in all)
will remain at their last states.
) inputs.
. Each
SN54BCT623 ...J OR W PACKAGE
SN74BCT623 . . . DW OR N PACKAGE
OEAB
SN54BCT623 . . . FK PACKAGE
A3
A4
A5
A6
A7
(TOP VIEW)
A1
A2
A3
A4
A5
A6
A7
A8
GND
3 2 1 20 19
4
5
6
7
8
9
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
(TOP VIEW)
B8
V
CC
B7
A2A1OEAB
10 11 12 13
A8
V
CC
OEBA
B1
B2
B3
B4
B5
B6
B7
B8
OEBA
18
17
16
15
14
B6
B1
B2
B3
B4
B5
GND
The SN54BCT623 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74BCT623 is characterized for
operation from 0°C to 70°C.
OEBA OEAB
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.
FUNCTION TABLE
INPUTS
L L B data to A bus
L H
H L Isolation
H H A data to B bus
B data to A bus,
A data to B bus
Copyright 1993, Texas Instruments Incorporated
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2–1
SN54BCT623, SN74BCT623
UNIT
IOHHigh-level output current
mA
IOLLow-level output current
mA
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS020A – SEPTEMBER 1988 – REVISED NOVEMBER 1993
19
1
2
3
4
5
6
7
8
9
†
EN1
EN2
18
17
16
15
14
13
12
11
B1
B2
B3
B4
B5
B6
B7
B8
1
1
2
1
logic diagram (positive logic)
OEBA
OEAB
19
1
A1 B1
To Seven Other Channels
182
logic symbol
OEBA
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
Input voltage range: Control inputs (see Note 1) – 0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O ports (see Note 1) – 0.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the disabled or power-off state, V
Voltage range applied to any output in the high state, V
Input clamp current, I
–30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IK
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O
O
Current into any output in the low state: SN54BCT623 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT623 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54BCT623 – 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT623 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range – 65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‡
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
– 0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
– 0.5 V to 5.5 V. . . . . . . . . . . . . . .
– 0.5 V to V
‡
CC
recommended operating conditions
V
CC
V
IH
V
IL
I
IK
T
A
2–2
SN54BCT623 SN74BCT623
MIN NOM MAX MIN NOM MAX
Supply voltage 4.5 5 5.5 4.5 5 5.5 V
High-level input voltage 2 2 V
Low-level input voltage 0.8 0.8 V
Input clamp current –18 –18 mA
p
p
Operating free-air temperature –55 125 0 70 °C
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
A port –3 –3
B port –12 –15
A port 20 24
B port 48 64
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