SN54HC244, SN74HC244
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SCLS130D – DECEMBER 1982 – REVISED AUGUST 2003
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Wide Operating Voltage Range of 2 V to 6 V
High-Current Outputs Drive Up To
15 LSTTL Loads
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
Low Power Consumption, 80-µA Max I
CC
Typical t
pd
= 11 ns
±6-mA Output Drive at 5 V
Low Input Current of 1 µA Max
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
SN54HC244 ...J OR W PACKAGE
SN74HC244 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
3212019
910111213
4
5
6
7
8
18
17
16
15
14
1Y1
2A4
1Y2
2A3
1Y3
1A2
2Y3
1A3
2Y2
1A4
SN54HC244 . . . FK PACKAGE
(TOP VIEW)
2Y4
1A1
1OE
1Y4
2A2 2OE
2Y1
GND
2A1
V
CC
description/ordering information
These octal buffers and line drivers are designed specifically to improve both the performance and density of
3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The ’HC244
devices are 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
T
A
PACKAGE
†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP – N T ube of 20 SN74HC244N SN74HC244N
T ube of 25 SN74HC244DW
Reel of 2000 SN74HC244DWR
°
°
SOP – NS Reel of 2000 SN74HC244NSR HC244
SSOP – DB Reel of 2000 SN74HC244DBR HC244
T ube of 70 SN74HC244PW
Reel of 2000 SN74HC244PWR
Reel of 250 SN74HC244PWT
CDIP – J T ube of 20 SNJ54HC244J SNJ54HC244J
°
°
CFP – W T ube of 85 SNJ54HC244W SNJ54HC244W
LCCC – FK T ube of 55 SNJ54HC244FK SNJ54HC244FK
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
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.
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.
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.
