SN54AHCT126, SN74AHCT126
QUADRUPLE BUS BUFFER GATES
WITH 3-STATE OUTPUTS

SCLS265O – DECEMBER 1995 – REVISED JULY 2003
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
C0068 Inputs Are TTL-Voltage Compatible
C0068 Latch-Up Performance Exceeds 250 mA Per
JESD 17
C0068 ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
description/ordering information
The ’AHCT126 devices are quadruple bus buffer
gates featuring independent line drivers with
3-state outputs. Each output is disabled when the
associated output-enable (OE) input is low. When
OE is high, the respective gate passes the data
from the A input to its Y output.
To ensure the high-impedance state during power
up or power down, OE should be tied to GND
through a pulldown resistor; the minimum value of
the resistor is determined by the current-sourcing
capability of the driver.
ORDERING INFORMATION
T
A
PACKAGE
†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP – N Tube SN74AHCT126N SN74AHCT126N
SOIC – D
Tube SN74AHCT126D
AHCT126 –
Tape and reel SN74AHCT126DR
–40°Cto85°C
SOP – NS Tape and reel SN74AHCT126NSR AHCT126
–40 C to 85
SSOP – DB Tape and reel SN74AHCT126DBR HB126
TSSOP PW
Tube SN74AHCT126PW
HB126 –
Tape and reel SN74AHCT126PWR
TVSOP – DGV Tape and reel SN74AHCT126DGVR HB126
CDIP – J Tube SNJ54AHCT126J SNJ54AHCT126J
–55°C to 125°C CFP – W Tube SNJ54AHCT126W SNJ54AHCT126W
LCCC – FK Tube SNJ54AHCT126FK SNJ54AHCT126FK
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
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
SN54AHCT126 . . . J OR W PACKAGE
SN74AHCT126 . . . D, DB, DGV, N, NS, OR PW PACKAGE
(TOP VIEW)
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
SN54AHCT126 . . . 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.

Copyright  2003, Texas Instruments Incorporated
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.
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.