IDT74LVC244A
3.3V CMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS,
5 VOLT TOLERANT I/O
鈥?0.5 MICRON CMOS Technology
鈥?ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
鈥?V
CC
= 3.3V 鹵 0.3V, Normal Range
鈥?V
CC
= 2.7V to 3.6V, Extended Range
鈥?CMOS power levels (0.4碌 W typ. static)
碌
鈥?Rail-to-rail output swing for increased noise margin
鈥?All inputs, outputs, and I/O are 5V tolerant
鈥?Supports hot insertion
鈥?Available in SOIC, SSOP, QSOP, and TSSOP packages
IDT74LVC244A
FEATURES:
DESCRIPTION:
DRIVE FEATURES:
APPLICATIONS:
The LVC244A 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 LVC244A has been designed with a 鹵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 V
CC
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.
鈥?High Output Drivers: 鹵24mA
鈥?Reduced system switching noise
鈥?5V and 3.3V mixed voltage systems
鈥?Data communication and telecommunication systems
FUNCTIONAL BLOCK DIAGRAM
1
OE
1
2
OE
19
1
A
1
2
18
1
Y
1
2
A
1
11
9
2
Y
1
1
A
2
4
16
1
Y
2
2
A
2
13
7
2
Y
2
1
A
3
6
14
1
Y
3
2
A
3
15
5
2
Y
3
1
A
4
8
12
1
Y
4
2
A
4
17
3
2
Y
4
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
漏 1999 Integrated Device Technology, Inc.
OCTOBER 1999
DSC-4614/1
1
2
3
4
5
6
