HV9408PJ-G

Shift Registers Overview

The HV9408PJ-G is a low-voltage serial-to-high-voltage parallel converter manufactured by Microchip Technology (originally Supertex). It features a 32-bit static shift register, 32 latches, and high-voltage push-pull outputs. The device operates with a logic supply voltage (VDD) of 4.5 V to 5.5 V and a high-voltage supply (VPP) ranging from 8.0 V to 80 V. It supports clock frequencies up to 8.0 MHz and utilizes HVCMOS technology for efficient level shifting.

Shift Registers Feature Summary

• Processes data using HVCMOS technology for low power level shifting.
• Provides 32 high-voltage push-pull outputs capable of sourcing and sinking current.
• Includes internal latch enable and output enable control logic.
• Supports cascading via a dedicated serial data output pin.

Shift Registers Applications

• Driver for AC-electroluminescent displays
• Driving plasma panels
• Vacuum fluorescent display drivers
• Large matrix LCD displays

Shift Registers Procurement Notes

Verify the component originates from authorized Microchip or Supertex channels to ensure authenticity. Confirm RoHS compliance status as indicated by the 'G' suffix. Check datasheet revisions for any updates to electrical characteristics or package dimensions before finalizing procurement specifications.

Shift Registers Selection Notes

Select this component when designing systems requiring multiple high-voltage outputs controlled by standard CMOS logic levels. Ensure the application voltage does not exceed the 80 V maximum rating for VPP. Consider the 44-lead PLCC package constraints and thermal dissipation requirements for the specific PCB layout.

Shift Registers Part Context

This part belongs to the HV9408 series of serial-to-parallel converters. It was originally developed by Supertex Inc. and is now part of the Microchip Technology portfolio. The device is designed specifically for high-voltage interface applications where low-voltage digital signals must drive high-voltage loads efficiently.

Shift Registers Replacement Considerations

Check for direct cross-references within the Microchip product line. Verify pin compatibility and electrical parameters against alternative serial-to-parallel converters if sourcing from other manufacturers. Ensure replacement parts support the required 80 V output capability and 32-channel configuration.

Shift Registers FAQ

What is the direction of data shifting in the HV9408?

The HV9408 shifts data in a counter-clockwise direction when viewed from the top of the package.

How does the Latch Enable (LE) input function?

When LE is high, data from the shift register is transferred into the latches. When LE is low, the latched data is retained while new data can be clocked into the shift register.

What happens when the Output Enable (OE) input is low?

When OE is low, all high-voltage outputs are forced into a low state, regardless of the data stored in the latches.