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ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Buffer, driver TSSOP 20
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 
  
SCLS529C − AUGUST 2003 − REVISED APRIL 2008
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D Qualified for Automotive Applications
D ESD Protection Exceeds 1000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D EPIC (Enhanced-Performance Implanted
CMOS) Process
D Inputs Are TTL-Voltage Compatible
description/ordering information
This octal buffer/driver is designed specifically to
improve both the performance and density of 3-state
memory-address drivers, clock drivers, and
bus-oriented receivers and transmitters.
The SN74AHCT244 is organized as two 4-bit buffers/line drivers with separate output-enable (OE
) inputs.
When OE
is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are
in the high-impedance state.
To ensure the high-impedance state during power up or power down, OE
shall be tied to V
CC
through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
{
T
A
PACKAGE
‡
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
−40°C to 85°C TSSOP − PW Tape and reel SN74AHCT244IPWRQ1 AHCT244I
−40°C to 125°C
SOIC − DW Tape and reel SN74AHCT244QDWRQ1 AHCT244Q
−40
°
C to 125
°
C
TSSOP − PW Tape and reel SN74AHCT244QPWRQ1 AHCT244Q
†
For the most current package and ordering information, see the Package Option Addendum at the end of
this document, or see the TI web site at http://www.ti.com.
‡
Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.
FUNCTION TABLE
(each 4-bit buffer/driver)
INPUTS
OUTPUT
OE A
OUTPUT
Y
L H H
L LL
H X Z
Copyright 2008, Texas Instruments Incorporated
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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.
EPIC is a trademark of Texas Instruments.
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1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
DW OR PW PACKAGE
(TOP VIEW)

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