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Texas Instruments (TI) Electronic Components Datasheet

SN54F623 Datasheet

Octal Bus Transceivers

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Local Bus-Latch Capability
Noninverting Logic
Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
These octal bus transceivers are designed for
asynchronous communication between data
buses. The control function implementation allows
for maximum flexibility in timing.
These 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.
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. Each
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.
The SN54F623 is characterized for operation over
the full military temperature range of – 55°C to
125°C. The SN74F623 is characterized for
operation from 0°C to 70°C.
SN54F623, SN74F623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS087 – MARCH 1987 – REVISED OCTOBER 1993
SN54F623 . . . J PACKAGE
SN74F623 . . . DW OR N PACKAGE
(TOP VIEW)
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 OEBA
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
SN54F623 . . . FK PACKAGE
(TOP VIEW)
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
FUNCTION TABLE
INPUTS
OEBA OEAB
OPERATION
L L B data to A bus
L
H
B data to A bus,
A data to B bus
HL
Isolation
H H A data to B bus
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 © 1993, Texas Instruments Incorporated
2–1


Texas Instruments (TI) Electronic Components Datasheet

SN54F623 Datasheet

Octal Bus Transceivers

No Preview Available !

SN54F623, SN74F623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS087 – MARCH 1987 – REVISED OCTOBER 1993
logic symbol
logic diagram (positive logic)
OEBA
OEAB
19
1
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8
EN1
EN2
1
2
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
B8
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
19
OEBA
1
OEAB
A1 2
18 B1
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Input voltage range, VI (excluding I/O ports) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 1.2 V to 7 V
Input current range, IIK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30 mA to 5 mA
Voltage range applied to any output in the disabled or power-off state . . . . . . . . . . . . . . . . . . . . – 0.5 V to 5.5 V
Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC
Current into any output in the low state: SN54F623 (A1 – A8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA
SN54F623 (B1 – B8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74F623 (A1 – A8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 mA
SN74F623 (B1 – B8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range: SN54F623 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C
SN74F623 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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-voltage ratings may be exceeded provided the input-current ratings are observed.
recommended operating conditions
VCC
VIH
VIL
IIK
IOH
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
IOL Low-level output current
TA Operating free-air temperature
A1 – A8
B1 – B8
A1 – A8
B1 – B8
SN54F623
MIN NOM MAX
4.5 5 5.5
2
0.8
– 18
–3
– 12
20
48
– 55 125
SN74F623
MIN NOM MAX
4.5 5 5.5
2
0.8
– 18
–3
– 15
24
64
0 70
UNIT
V
V
V
mA
mA
mA
°C
2–2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN54F623
Description Octal Bus Transceivers
Maker Texas
Total Page 13 Pages
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