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Unisonic Technologies |
UNISONIC TECHNOLOGIES CO., LTD
U74AC244
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
DESCRIPTION
The U74AC244 is a octal buffers/drivers with 3-state outputs. It is
organized as two 4-bit buffers/drivers with separate output-enable
( OE ) inputs. When OE is high, the Y outputs are in a
high-impedance state, and the outputs neither load nor drive the bus
lines. When OE is low, the device passes noninverted data from
the A inputs to the Y outputs.
The U74AC244 is designed to improve the performance and
density of 3-state memory address drivers, clock drivers, and
bus-oriented receivers and transmitters.
To ensure the high-impedance state during power up or power
down, OE should be tied to VCC through a pull-up resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.
FEATURES
* Wide supply voltage range from 2V to 6V
* Max tpd of 7 ns from A to Y at 5V
* Low power consumption, ICC = 4 μA (Max.) at 5.5V
* ±24 mA output driver at 5.5V
www.DataSheet.net/
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74AC244L-P20-R
U74AC244G- P20-R
U74AC244L- P20-T
U74AC244G- P20-T
Package
TSSOP-20
TSSOP-20
CMOS IC
TSSOP-20
Packing
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
1 of 6
QW-R502-784.A
Datasheet pdf - http://www.DataSheet4U.co.kr/
U74AC244
PIN CONFIGURATION
CMOS IC
FUNCTION TABLE (each buffer)
INPUTS
OE
A
OUTPUT
Y
L HH
L LL
H XZ
www.DataSheet.net/
LOGIC SYMBOL (positive logic)
1
1OE
2OE 19
1A1 2
18
1Y1
2A1 11
4
1A2
16
1Y2
2A2 13
6
1A3
14
1Y3
2A3 15
8
1A4
12
1Y4
2A4 17
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
9 2Y1
7 2Y2
5 2Y3
3 2Y4
2 of 6
QW-R502-784.A
Datasheet pdf - http://www.DataSheet4U.co.kr/
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