SN74AHC244Q BUFFER/DRIVER Datasheet

SN74AHC244Q Datasheet, PDF, Equivalent


Part Number

SN74AHC244Q

Description

OCTAL BUFFER/DRIVER

Manufacture

etcTI

Total Page 15 Pages
Datasheet
Download SN74AHC244Q Datasheet


SN74AHC244Q
D Q Devices Meet Automotive Performance
Requirements
D Customer-Specific Configuration Control
Can Be Supported Along With
Major-Change Approval
D EPIC(Enhanced-Performance Implanted
CMOS) Process
D Operating Range 2-V to 5.5-V VCC
D Latch-Up Performance Exceeds 250 mA Per
JESD 17
description
SN74AHC244Q
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SGDS017 – FEBRUARY 2002
DW OR PW PACKAGE
(TOP VIEW)
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 2OE
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
This octal buffer/driver is designed specifically to
improve the performance and density of 3-state
memory-address drivers, clock drivers, and
bus-oriented receivers and transmitters.
The SN74AHC244Q 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 should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
–40°C to 125°C
SOIC – D
TSSOP – PW
Tape and reel
Tape and reel
SN74AHC244QDWR
SN74AHC244QPWR
AHC244Q
HA244Q
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
FUNCTION TABLE
(each 4-bit buffer/driver)
INPUTS
OE A
OUTPUT
Y
LH
H
LL
L
HX
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.
EPIC is a trademark of Texas Instruments.
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 2002, Texas Instruments Incorporated
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
1

SN74AHC244Q
SN74AHC244Q
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SGDS017 FEBRUARY 2002
logic symbol
1
1OE
EN
19
2OE
2
1A1
4
1A2
6
1A3
8
1A4
18
1Y1
16
1Y2
14
1Y3
12
1Y4
11
2A1
13
2A2
15
2A3
17
2A4
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
1OE 1
2OE 19
2
1A1
18 1Y1
11
2A1
EN
9
2Y1
7
2Y2
5
2Y3
3
2Y4
9 2Y1
4
1A2
16 1Y2
13
2A2
7 2Y2
1A3 6
14 1Y3
2A3 15
5 2Y3
1A4 8
12 1Y4
2A4 17
3 2Y4
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Stresses beyond those listed under absolute maximum ratingsmay 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 conditionsis not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Features D Q Devices Meet Automotive Performance Requirements D Customer-Specific Config uration Control Can Be Supported Along With Major-Change Approval D EPIC (E nhanced-Performance Implanted CMOS) Pro cess D Operating Range 2-V to 5.5-V VCC D Latch-Up Performance Exceeds 250 mA Per JESD 17 description SN74AHC244Q OC TAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SGDS017 – FEBRUARY 2002 DW OR PW PACK AGE (TOP VIEW) 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND 1 2 3 4 5 6 7 8 9 10 20 VCC 19 2OE 18 1Y1 17 2A4 16 1Y2 15 2A3 14 1Y3 13 2A2 12 1Y4 11 2A1 This o ctal buffer/driver is designed specific ally to improve the performance and den sity of 3-state memory-address drivers, clock drivers, and bus-oriented receiv ers and transmitters. The SN74AHC244Q is organized as two 4-bit buffers/line drivers with separate output-enable (OE ) inputs. When OE is low, the device pa sses data from the A inputs to the Y ou tputs. When OE is high, the outputs are in the high-impedance state. To ensure the high-impedance state d.
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