54LVTH244A

Features:

• 3.3V ABT octal buffers/drivers with 3-state outputs
• RAD-PAK® radiation-hardened against natural space radiation
• 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 VCC
• Supports mixed-mode signal operation
   - 5V input and output voltages with 3.3V VCC
• Supports unregulated battery operation down to 2.7V
• Typical VOLP (output ground bounce) < 0.8V at VCC=3.3V, TA=25°C
• Supports live insertion
• Bus-hold data inputs eliminate the need for external pullup resistors


Pinout




Specifications

PARAMETER	SYMBOL	MIN	MAX	UNIT
Supply Voltage Range	VCC	-0.5	4.6	V
Input Voltage Range 2	VI	-0.5	7.0	V
Voltage Range Applied to Any Output in the High State or Power-Off State	VO	-0.5	7.0	V
Current into Any Output in the Low State	IO	--	96	mA
Current Into Any Output in the High State 3	IO	--	48	mA
Input Clamp Current (VI < 0)	IIK	--	-50	mA
Output Clamp Current (VO < 0)	IOK	--	-50	mA
Total Power Dissipation at TA = 55 °C	PD	--	650	mW
Operating Temperature	TA	-55	125	°C
Storage Temperature Range	TS	-65	150	°C

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) VCC operation, but with the capability to provide a TTL interface to a 5V system environment. The 54LVTH244A is organized 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 technology of 54LVTH244A incorporates radiation shielding in the microcircuit package. It eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or a space mission. This 54LVTH244A is available with packaging and screening up to Class S.