1
Memory
All data sheets are subject to change without notice
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P
RELIMINARY
3.3V ABT 8-Bit Octal
54LVTH244A
©2001 Maxwell Technologies
All rights reserved.
Buffers/Drivers
12.19.01 Rev 11000601
FEATURES:
• 3.3V ABT octal buffers/drivers with 3-state outputs
•RAD-PAK® radiation-hardened against natural space radia-
tion
• Package:
- 20 Pin RAD-PAK® flat package
• Operating temperature range:
-55 to 125
°
C
• Supports mixed-mode signal operation
-5V Input and Output Voltages with 3.3V V
CC
• Supports mixed-mode signal operation
- 5V input and output voltages with 3.3V V
CC
• Supports unregulated battery operation down to 2.7V
•Typical V
OLP
(output ground bounce) < 0.8V at V
CC
=3.3V,
T
A
=25
°
C
• Supports live insertion
• Bus-hold data inputs eliminate the need for external pullup
resistors
DESCRIPTION:
Maxwell Technologies’ 54LVTH244A octal buffers/drivers
micro-circuit is housed in a Rad-Pak® package. The
54LVTH244A is designed specifically for low voltage (3.3V)
V
CC
operation, but with the capability to provide a TTL inter-
face to a 5V system environment. The 54LVTH244A is orga-
nized as two 4-bit 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 54LVTH244A active bus hold
circuitry is provided to prevent floating data inputs at a valid
logic level and to eliminate the need for pullup resistors.
Maxwell Technologies' patented RAD-PAK® packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or a space
mission. This product is available with packaging and screen-
ing up to Class S.
Logic Diagram