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PDF U74AC240 Data sheet ( Hoja de datos )

Número de pieza U74AC240
Descripción OCTAL BUFFERS/DRIVERS
Fabricantes Unisonic Technologies 
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No Preview Available ! U74AC240 Hoja de datos, Descripción, Manual

UNISONIC TECHNOLOGIES CO., LTD
U74AC240
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
„ DESCRIPTION
The U74AC240 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 inverted data from the A
inputs to the Y outputs.
The U74AC240 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 6.5 ns from A to Y at 5V
* Low Power Consumption, ICC = 4μA (Max.) at 5.5V
* ±24mA Output Driver at 5.5V
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„ ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74AC240L-P20-R
U74AC240G-P20-R
U74AC240L-P20-T
U74AC240G-P20-T
Package
TSSOP-20
TSSOP-20
CMOS IC
Packing
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
1 of 6
QW-R502-675.A
Datasheet pdf - http://www.DataSheet4U.co.kr/

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U74AC240 pdf
U74AC240
„ TEST CIRCUIT AND WAVEFORMS
CMOS IC
VCC
3.3V±0.3V
5V±0.5V
Inputs
VIN tR, tF
VCC 2.5ns
VCC 2.5ns
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
VM
VCC/2
VCC/2
S1
Open
VLOAD
Open
VLOAD
2*VCC
2*VCC
CL
50pF
50pF
RL
500
500
Input
Output
Output
VM
tPLH
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VM
tPHL
tPHL
VM
tPLH
VM
VM VM
Voltage Waveforms Propagation Delay Times
VIN
0V
VOH
VOL
VOH
VOL
VΔ
0.3V
0.5V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 6
QW-R502-675.A
Datasheet pdf - http://www.DataSheet4U.co.kr/

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