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SN74HCT244-Q1 Datasheet Preview

SN74HCT244-Q1 Datasheet

OCTAL BUFFER AND LINE DRIVER

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D Qualified for Automotive Applications
D ESD Protection Exceeds 1000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D Operating Voltage Range of 4.5 V to 5.5 V
D High-Current Outputs Drive Up To 15
LSTTL Loads
D Low Power Consumption, 80-µA Max ICC
D Typical tpd = 13 ns
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
D Inputs Are TTL-Voltage Compatible
D 3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
SN74HCT244ĆQ1
OCTAL BUFFER AND LINE DRIVER
WITH 3ĆSTATE OUTPUTS
SCLS509A − JUNE 2003 − REVISED FEBRUARY 2008
PW PACKAGE
(TOP VIEW)
1OE 1
1A1 2
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
20 VCC
19 2OE
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
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 ’HCT244 device 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
TA
PACKAGE‡
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
−40°C to 125°C TSSOP − PW
Tape and reel SN74HCT244QPWRQ1 HT244Q
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
L
H
H
L
L
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.
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2008, Texas Instruments Incorporated
1




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SN74HCT244-Q1 Datasheet Preview

SN74HCT244-Q1 Datasheet

OCTAL BUFFER AND LINE DRIVER

No Preview Available !

SN74HCT244ĆQ1
OCTAL BUFFER AND LINE DRIVER
WITH 3ĆSTATE OUTPUTS
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 (unless otherwise noted)
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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
VIH
VIL
VI
VO
t/v
Supply voltage
High-level input voltage
Low-level input voltage
Input voltage
Output voltage
Input transition rise/fall time
VCC = 4.5 V to 5.5 V
VCC = 4.5 V to 5.5 V
4.5
5 5.5 V
2
V
0.8 V
0
VCC V
0
VCC V
500 ns
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


Part Number SN74HCT244-Q1
Description OCTAL BUFFER AND LINE DRIVER
Maker etcTI
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