IDT74LVC2244A
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, BUS-HOLD
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 QSOP and TSSOP packages
IDT74LVCH2244A
FEATURES:
DESCRIPTION:
DRIVE FEATURES:
APPLICATIONS:
鈥?Balanced Output Drivers: 鹵12mA
鈥?Low switching noise
This octal buffer/driver is built using advanced dual metal CMOS technol-
ogy. The LVCH2244A 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 LVCH2244A has series resistors in the device output structure which
will significantly reduce line noise when used with light loads. This driver has
been designed to drive 鹵12mA at the designated threshold levels.
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 LVCH2244A has 鈥渂us-hold鈥?which retains the inputs鈥?last state
whenever the input goes to a high impedance. This prevents floating inputs
and eliminates the need for pull-up/down resistors.
鈥?5V and 3.3V mixed voltage systems
鈥?Data communication and telecommunication systems
FUNCTIONAL BLOCK DIAGRAM
1
OE
1
2
OE
19
1A1
2
18
1
Y
1
2
A
1
11
9
2
Y
1
1A2
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 2004 Integrated Device Technology, Inc.
JANUARY 2004
DSC-4886/2
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