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IDT74LVCH244A Fiches technique(PDF) 1 Page - Integrated Device Technology

No de pièce IDT74LVCH244A
Description  3.3V CMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS AND BUS-HOLD
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Fabricant  IDT [Integrated Device Technology]
Site Internet  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT74LVCH244A Fiches technique(HTML) 1 Page - Integrated Device Technology

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INDUSTRIALTEMPERATURERANGE
IDT74LVCH244A
3.3VCMOSOCTALBUFFER/DRIVERWITH3-STATEOUTPUTS
1
AUGUST 1999
INDUSTRIAL TEMPERATURE RANGE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
© 1999 Integrated Device Technology, Inc.
DSC-4625/1
FEATURES:
• 0.5 MICRON CMOS Technology
• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
•VCC = 3.3V ± 0.3V, Normal Range
•VCC = 2.7V to 3.6V, Extended Range
• CMOS power levels (0.4
µµµµµ W typ. static)
• Rail-to-rail output swing for increased noise margin
• All inputs, outputs, and I/O are 5V tolerant
• Supports hot insertion
• Available in SOIC, SSOP, QSOP, and TSSOP packages
FUNCTIONAL BLOCK DIAGRAM
APPLICATIONS:
• 5V and 3.3V mixed voltage systems
• Data communication and telecommunication systems
DRIVE FEATURES:
• High Output Drivers: ±24mA
• Reduced system switching noise
IDT74LVCH244A
3.3V CMOS
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
AND BUS-HOLD
DESCRIPTION:
The LVCH244A octal buffer/driver is built using advanced dual metal
CMOS technology. This device is organized as two 4-bit 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.
The LVCH244A has been designed with a ±24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance.
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.
Inputs can be driven from either 3.3V or 5V devices. This feature allows
theuseofthisdeviceasatranslatorinamixed3.3V/5Vsystemenvironment.
The LVCH244A has “bus-hold” which retains the inputs’ last state
whenever the input goes to a high impedance. This prevents floating inputs
and eliminates the need for pull-up/down resistors.
1
A1
1
A2
1
A3
1
A4
1
Y1
1
Y2
1
Y3
1
Y4
2
A1
2
A2
2
A3
2
A4
2
Y1
2
OE
2
Y2
2
Y3
2
Y4
19
11
9
15
5
7
13
3
17
1
2
4
6
8
18
16
14
12
1
OE


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