SN74AHC244-Q1 BUFFER/DRIVER Datasheet

SN74AHC244-Q1 Datasheet, PDF, Equivalent


Part Number

SN74AHC244-Q1

Description

OCTAL BUFFER/DRIVER

Manufacture

etcTI

Total Page 16 Pages
Datasheet
Download SN74AHC244-Q1 Datasheet


SN74AHC244-Q1
SN74AHC244ĆQ1
OCTAL BUFFER/DRIVER
WITH 3ĆSTATE OUTPUTS
SCLS526A − AUGUST 2003 − REVISED APRIL 2008
D Qualified for Automotive Applications
D ESD Protection Exceeds 1500 V Per
MIL-STD-883, Method 3015; Exceeds 150 V
Using Machine Model (C = 200 pF, R = 0)
D EPIC(Enhanced-Performance Implanted
CMOS) Process
D Operating Range 2-V to 5.5-V VCC
description/ordering information
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.
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
The SN74AHC244 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 − DW Tape and reel
TSSOP − PW Tape and reel
SN74AHC244QDWRQ1
SN74AHC244QPWRQ1
AHC244Q1
AHC244Q1
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
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 2008, Texas Instruments Incorporated
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
1

SN74AHC244-Q1
SN74AHC244ĆQ1
OCTAL BUFFER/DRIVER
WITH 3ĆSTATE OUTPUTS
SCLS526A − AUGUST 2003 − REVISED APRIL 2008
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
6
1A3
14 1Y3
15
2A3
5 2Y3
8
1A4
12
1Y4
17
2A4
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 ratings” may 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 conditions” is 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 SN74AHC244ĆQ1 OCTAL BUFFER/DRIVER WITH 3ĆSTATE OUTPUTS SCLS526A − AUGUST 20 03 − REVISED APRIL 2008 D Qualified for Automotive Applications D ESD Prote ction Exceeds 1500 V Per MIL-STD-883, M ethod 3015; Exceeds 150 V Using Machine Model (C = 200 pF, R = 0) D EPIC (E nhanced-Performance Implanted CMOS) Pro cess D Operating Range 2-V to 5.5-V VCC description/ordering information This octal buffer/driver is designed specifi cally to improve the performance and de nsity of 3-state memory-address drivers , clock drivers, and bus-oriented recei vers and transmitters. DW OR PW PACKAG E (TOP VIEW) 1OE 1A1 2Y4 1A2 2Y3 1A3 2 Y2 1A4 2Y1 GND 1 2 3 4 5 6 7 8 9 10 2 0 VCC 19 2OE 18 1Y1 17 2A4 16 1Y2 15 2A 3 14 1Y3 13 2A2 12 1Y4 11 2A1 The SN74 AHC244 is organized as two 4-bit buffer s/line drivers with separate output-ena ble (OE) inputs. When OE is low, the de vice passes data from the A inputs to t he Y outputs. When OE is high, the outp uts are in the high-impedance state. To ensure the high-impedance stat.
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