SN74HC244-Q1 Drivers Datasheet

SN74HC244-Q1 Datasheet, PDF, Equivalent


Part Number

SN74HC244-Q1

Description

Octal Buffers and Line Drivers

Manufacture

etcTI

Total Page 14 Pages
Datasheet
Download SN74HC244-Q1 Datasheet


SN74HC244-Q1
D Qualified for Automotive Applications
D ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D Wide Operating Voltage Range of 2 V to 6 V
D High-Current Outputs Drive Up To 15
LSTTL Loads
D 3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
D Low Power Consumption, 80-µA Max ICC
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.
SN74HC244ĆQ1
OCTAL BUFFER AND LINE DRIVER
WITH 3ĆSTATE OUTPUTS
SCLS543A − SEPTEMBER 2002 − REVISED APRIL 2008
D Typical tpd = 11 ns
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
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
ORDERING INFORMATION{
TA
PACKAGE‡
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
SOIC − DW
−40°C to 125°C
TSSOP − PW
Reel of 2000
Reel of 2000
SN74HC244QDWRQ1
SN74HC244QPWRQ1
HC244Q
HC244Q
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 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.
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
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
1

SN74HC244-Q1
SN74HC244ĆQ1
OCTAL BUFFER AND LINE DRIVER
WITH 3ĆSTATE OUTPUTS
SCLS543A − SEPTEMBER 2002 − REVISED APRIL 2008
logic diagram (positive logic)
1
1OE
19
2OE
1A1 2
1A2 4
1A3 6
1A4 8
18 1Y1
16 1Y2
14 1Y3
12 1Y4
2A1 11
2A2 13
15
2A3
2A4 17
9
2Y1
7
2Y2
5
2Y3
3
2Y4
absolute maximum ratings over operating free-air temperature range
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 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.
recommended operating conditions (see Note 3)
MIN NOM MAX UNIT
VCC Supply voltage
2 5 6V
VCC = 2 V
1.5
VIH High-level input voltage
VCC = 4.5 V
VCC = 6 V
3.15
4.2
V
VCC = 2 V
0.5
VIL Low-level input voltage
VCC = 4.5 V
VCC = 6 V
1.35 V
1.8
VI Input voltage
0 VCC V
VO Output voltage
0 VCC V
VCC = 2 V
1000
tt Input transition (rise and fall) time
VCC = 4.5 V
500 ns
VCC = 6 V
400
TA Operating free-air temperature
−40 125 °C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443


Features D Qualified for Automotive Applications D ESD Protection Exceeds 2000 V Per MIL -STD-883, Method 3015; Exceeds 200 V Us ing Machine Model (C = 200 pF, R = 0) D Wide Operating Voltage Range of 2 V to 6 V D High-Current Outputs Drive Up To 15 LSTTL Loads D 3-State Outputs Drive Bus Lines or Buffer Memory Address Reg isters D Low Power Consumption, 80-µA Max ICC description/ordering informatio n This octal buffer and line driver is designed specifically to improve both t he performance and density of 3-state m emory address drivers, clock drivers, a nd bus-oriented receivers and transmitt ers. The SN74HC244 is organized as two 4-bit buffers/drivers with separate out put-enable (OE) inputs. When OE is low, the device passes noninverted data fro m the A inputs to the Y outputs. When O E is high, the outputs are in the high- impedance state. SN74HC244ĆQ1 OCTAL B UFFER AND LINE DRIVER WITH 3ĆSTATE OUT PUTS SCLS543A − SEPTEMBER 2002 − RE VISED APRIL 2008 D Typical tpd = 11 ns D ±6-mA Output Drive at 5 V D L.
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