Texas Instruments SN54BCT125AJ, SN74BCT125AD, SN74BCT125ADR, SN74BCT125AN, SNJ54BCT125AFK Datasheet
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SN54BCT125A, SN74BCT125A
QUADRUPLE BUS BUFFER GATES
WITH 3-STATE OUTPUTS
SCBS032E – SEPTEMBER 1988 – REVISED APRIL 1994
• State-of-the-Art BiCMOS Design
Significantly Reduces I
CCZ
• 3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
• Package Options Include Plastic
Small-Outline (D) Packages, Ceramic Chip
Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil
DIPs (J, N)
description
The ′BCT125A bus buffer features independent
line drivers with 3-state outputs. Each output is
disabled when the associated output-enable (OE)
input is high.
The SN54BCT125A is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74BCT125A is characterized for
operation from 0°C to 70°C.
FUNCTION TABLE
(each buffer)
INPUTS
OE A
L H H
L LL
H X Z
OUTPUT
Y
SN54BCT125A ...J OR W PACKAGE
SN74BCT125A ...D OR N PACKAGE
SN54BCT125A . . . FK PACKAGE
1Y
NC
2OE
NC
2A
NC – No internal connection
(TOP VIEW)
1
1OE
2
1A
3
1Y
4
2OE
5
2A
6
2Y
7
GND
(TOP VIEW)
1A
3212019
4
5
6
7
8
910111213
2Y
1OE
GND
14
13
12
11
10
NC
NC
9
8
CC
V
3Y
V
CC
4OE
4A
4Y
3OE
3A
3Y
4OE
18
17
16
15
14
3A
4A
NC
4Y
NC
3OE
1
2
4
5
10
9
13
12
†
1
EN
logic symbol
1OE
1A
2OE
2A
3OE
3A
4OE
4A
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
Pin numbers shown are for the J, N, and W packages.
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.
logic diagram (positive logic)
3
1Y
6
2Y
8
3Y
11
4Y
1OE
2OE
3OE
4OE
1
23
1A 1Y
4
56
2A 2Y
10
98
3A 3Y
13
12 11
4A 4Y
Copyright 1994, Texas Instruments Incorporated
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2–3
SN54BCT125A, SN74BCT125A
UNIT
QUADRUPLE BUS BUFFER GATES
WITH 3-STATE OUTPUTS
SCBS032E – SEPTEMBER 1988 – REVISED APRIL 1994
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
Input voltage range, VI (see Note 1) – 0.5 V to 7 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, VO – 0.5 V to V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O
Current into any output in the low state: SN54BCT125A 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT125A 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54BCT125A – 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT125A 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. . . . . . . . . . . . . . .
recommended operating conditions
SN54BCT125A SN74BCT125A
MIN NOM MAX MIN NOM MAX
V
V
V
I
I
I
T
CC
IH
IL
IK
OH
OL
A
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
High-level output current –12 –15 mA
Low-level output current 48 64 mA
Operating free-air temperature –55 125 0 70 °C
†
CC
2–4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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