HV57908PG-G

Shift Registers Overview

The HV57908PG-G is a low-voltage to high-voltage serial-to-parallel converter manufactured by Microchip Technology. It features 64 push-pull outputs capable of up to 80V output voltage and operates at data rates up to 8 MHz. The device utilizes a 5V CMOS logic interface with a recommended operating supply voltage range of 4.5 V to 5.5 V. It incorporates a 64-bit static shift register, 64 latches, and control logic for polarity selection and output blanking. The component is housed in an 80-lead PQFP package and supports bidirectional shifting via the DIR pin.

Shift Registers Feature Summary

• Bidirectional shifting capability controlled by the DIR pin allows clockwise or counter-clockwise data flow through the internal registers.
• Outputs support hot switching and include diode connections to VPP to facilitate efficient power recovery during operation.
• Integrated control logic enables precise management of output polarity selection and signal blanking functions.

Shift Registers Applications

• Display Driver
• Vacuum Fluorescent Display Driver
• Inkjet Driver
• 3D Printer Driver
• Microelectromechanical Systems Applications

Shift Registers Procurement Notes

Verify that the ordering suffix PG-G corresponds to the 80-lead PQFP package configuration and lead-free compliance status as defined in the official product identification system. Confirm that the media type matches the standard tray packaging specifications for this specific part number variant before finalizing procurement orders.

Shift Registers Selection Notes

Select this component when designing systems requiring multiple-output high-voltage sourcing and sinking capabilities driven by low-voltage logic. Ensure the application environment remains within the specified -40°C to +85°C operating temperature range. Verify that the required output voltage does not exceed the 80V maximum rating and that the clock frequency requirements align with the 8 MHz limit.

Shift Registers Part Context

This device belongs to the HV57908 family of serial-to-parallel converters designed primarily for driving EL displays and plasma panels. It serves as a bridge between low-voltage control logic and high-voltage load drivers, providing a robust solution for applications necessitating numerous independent high-voltage channels from a single serial interface source.

Shift Registers Replacement Considerations

HV57908PG

Shift Registers FAQ

How is the direction of data shifting determined?

The direction of data shifting is controlled by the DIR pin. Connecting this pin to GND causes counter-clockwise shifting, while connecting it to VDD results in clockwise shifting.

What is the function of the DI/OB pin?

The DI/OB pin serves as a secondary data input/output terminal. Its function depends on the state of the DIR pin, allowing data to cascade through the shift register in either direction relative to the primary DI/OA pin.