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IDT74LVCH244A Datasheet, PDF (1/6 Pages) Integrated Device Technology – 3.3V CMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS AND BUS-HOLD | |||
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IDT74LVCH244A
3.3V CMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
3.3V CMOS
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
AND BUS-HOLD
INDUSTRIAL TEMPERATURE RANGE
IDT74LVCH244A
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 (0.4µ 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
DRIVE FEATURES:
⢠High Output Drivers: ±24mA
⢠Reduced system switching noise
APPLICATIONS:
⢠5V and 3.3V mixed voltage systems
⢠Data communication and telecommunication systems
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
the use of this device as a translator in a mixed 3.3V/5V system environment.
The LVCH244A has âbus-holdâ which retains the inputsâ last state
whenever the input goes to a high impedance. This prevents floating inputs
and eliminates the need for pull-up/down resistors.
FUNCTIONAL BLOCK DIAGRAM
1
1OE
1A1 2
1A2 4
1A3 6
1A4 8
19
2OE
18 1Y1
16 1Y2
14
1Y3
12 1Y4
2A1 11
2A2 13
2A3 15
2A4 17
9 2Y1
7 2Y2
5
2Y3
3
2Y4
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
© 1999 Integrated Device Technology, Inc.
AUGUST 1999
DSC-4625/1
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