74LVCH244APW,112

Overview

The Nexperia 74LVCH244APW,112 is an octal buffer and line driver featuring three-state outputs. It operates within a supply voltage range of 1.2 V to 3.6 V and accepts inputs up to 5.5 V. The device includes IOFF circuitry for partial power-down protection and bus hold functionality on all data inputs. It utilizes a TSSOP-20 package (SOT360-1) and supports ambient temperatures from -40 °C to +125 °C.

Feature Summary

• Bus hold circuitry maintains input states during undefined logic levels
• IOFF circuitry prevents backflow current during partial power-down
• Overvoltage tolerant inputs allow direct interfacing with 5 V devices

Applications

• Partial power-down mode operation in mixed-voltage systems
• Buffering and driving high-capacitance or low-impedance loads
• Translating signals between 3.3 V and 5 V domains

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package type and temperature rating. Confirm that the required bus hold and IOFF features are active for the intended application environment. Ensure compatibility with JEDEC standards JESD8-7A, JESD8-5A, and JESD8-C/JESD36 before finalizing procurement specifications.

Selection Notes

Select this component when designing circuits requiring robust signal buffering with overvoltage tolerance. The inclusion of bus hold ensures stable inputs without external pull-up or pull-down resistors. Verify that the operating voltage falls within the 1.2 V to 3.6 V range and that the TSSOP-20 package dimensions fit the PCB layout constraints.

Part Context

This part belongs to the 74LVC/LVCH244A family of octal buffers. It shares functional similarities with the standard 74LVC244A but adds specific LVCH features such as bus hold and optimized IOFF performance. It serves as a bridge between low-voltage logic cores and higher-voltage peripheral interfaces.

Replacement Considerations

The 74LVC244APW,112 is a compatible alternative lacking the bus hold feature. Other variants in the 74LVC244A series may be considered if bus hold is not required.