Texas Instruments SN54BCT126AJ, SN74BCT126AD, SN74BCT126ADR, SN74BCT126AN, SNJ54BCT126AFK Datasheet
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SN54BCT126A, SN74BCT126A
QUADRUPLE BUS BUFFER GATES
WITH 3-STATE OUTPUTS
SCBS252A – SEPTEMBER 1988 – REVISED APRIL 1994
Copyright 1994, Texas Instruments Incorporated
2–1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
• State-of-the-Art BiCMOS Design
Significantly Reduces I
CCZ
• ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015
• 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 ′BCT126A bus buffer features independent
line drivers with 3-state outputs. Each output is
disabled when the associated output-enable (OE)
input is low.
The SN54BCT126A is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74BCT126A is characterized for
operation from 0°C to 70°C.
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
OE A
Y
H H H
H LL
L X Z
SN54BCT126A ...J OR W PACKAGE
SN74BCT126A ...D OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1OE
1A
1Y
2OE
2A
2Y
GND
V
CC
4OE
4A
4Y
3OE
3A
3Y
3212019
910111213
4
5
6
7
8
18
17
16
15
14
4A
NC
4Y
NC
3OE
1Y
NC
2OE
NC
2A
1A
1OE
NC
3Y
3A
V
4OE
2Y
GND
NC
SN54BCT126A . . . FK PACKAGE
(TOP VIEW)
CC
NC – No internal connection
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.
SN54BCT126A, SN74BCT126A
QUADRUPLE BUS BUFFER GATES
WITH 3-STATE OUTPUTS
SCBS252A – SEPTEMBER 1988 – REVISED APRIL 1994
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbol
†
logic diagram (positive logic)
EN
1
1OE
2
1A
1Y
3
4
2OE
5
2A
10
3OE
9
3A
13
4OE
12
4A
2Y
6
3Y
8
4Y
11
1
4
56
2A 2Y
2OE
1
23
1A
1Y
1OE
10
98
3A
3Y
3OE
13
12 11
4A
4Y
4OE
†
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.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
‡
Supply voltage range, V
CC
– 0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
O
– 0.5 V to 5.5 V. . . . . . . . . . . . . . .
Voltage range applied to any output in the high state, V
O
– 0.5 V to V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state: SN54BCT126A 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT126A 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54BCT126A – 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT126A 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.
recommended operating conditions
SN54BCT126A SN74BCT126A
MIN NOM MAX MIN NOM MAX
UNIT
V
CC
Supply voltage 4.5 5 5.5 4.5 5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.8 0.8 V
I
IK
Input clamp current –18 –18 mA
I
OH
High-level output current –12 –15 mA
I
OL
Low-level output current 48 64 mA
T
A
Operating free-air temperature –55 125 0 70 °C
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