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ꢊ ꢅꢋꢌꢍ ꢎꢏꢐ ꢐ ꢈꢑ ꢌꢁꢒ ꢍ ꢓꢁꢈ ꢒ ꢑꢓ ꢔ ꢈꢑ
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SCLS463A − JULY 2002 − REVISED JANUARY 2004
DW OR PW PACKAGE
(TOP VIEW)
D
Controlled Baseline
− One Assembly/Test Site, One Fabrication
Site
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
V
CC
2OE
1
2
3
4
5
6
7
8
9
10
20
19
D
D
D
D
D
Extended Temperature Performance of Up
To −55°C to 125°C
Enhanced Diminishing Manufacturing
Sources (DMS) Support
18 1Y1
17 2A4
16
15
14
13
12
11
1Y2
2A3
1Y3
2A2
1Y4
2A1
Enhanced Product-Change Notification
†
Qualification Pedigree
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
GND
D
High-Current Outputs Drive Up To 15
LSTTL Loads
†
Component qualification in accordance with JEDEC and industry
standards to ensure reliable operation over an extended
temperature range. This includes, but is not limited to, Highly
Accelerated Stress Test (HAST) or biased 85/85, temperature
cycle, autoclave or unbiased HAST, electromigration, bond
intermetallic life, and mold compound life.
description/ordering information
This octal buffer and line 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 SN74HC244 is
organized as two 4-bit buffers/drivers with separate output-enable (OE) inputs. When OE is low, the device
passes noninverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
‡
PACKAGE
T
A
SOP − DW
TSSOP − PW
SOP − DW
Tape and reel
Tape and reel
Tape and reel
SN74HC244QDWREP
SN74HC244QPWREP
SN74HC244MDWREP
SHC244EP
−40°C to 125°C
−55°C to 125°C
SHC244EP
HC244MEP
‡
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
FUNCTION TABLE
(each buffer/driver)
INPUTS
OUTPUT
Y
OE
A
H
L
L
L
H
L
H
X
Z
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.
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