HV57908PG Microchip Integrated Circuit (Quad Flat Packages) In Stock
The HV57908PG is a 64-bit serial-to-parallel high-voltage shift register from Microchip capable of driving outputs at up to 80 V, housed in an 80-pin QFP package. It is designed for driving capacitive and resistive loads such as display segments, piezo actuators, and high-voltage relay coils. Available from stock worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat Packages
- Pin Count
- 80
- Lifecycle
- ACTIVE
- Datasheet
- HV57908PG Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 64 serial-input, parallel-output channels rated at 80 V output voltage for direct drive of high-voltage loads without external transistors
- Serial-to-parallel shift register interface (SPI-compatible) reduces microcontroller I/O pin count to 3 lines regardless of load count
- High-voltage open-drain outputs sink up to 10 mA per channel, suitable for driving EL panels, plasma displays, and piezoelectric actuators
- 80-pin QFP package integrates 64 high-voltage output drivers in a single IC, reducing BOM count and PCB area versus discrete MOSFET arrays
Applications
The HV57908PG is primarily used in high-voltage segment display drivers, electroluminescent (EL) panel controllers, and piezo actuator drive circuits where 64 independently controlled outputs at up to 80 V are required. Its serial SPI-compatible interface allows a microcontroller with only 3 I/O pins to control all 64 channels, making it well suited for matrix display systems, plasma indicator panels, and industrial relay-coil sequencers. The integrated 80 V rated outputs eliminate the need for external high-voltage transistors or MOSFETs on each output channel, significantly reducing board area and component count.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many output channels does HV57908PG provide, and what voltage can each output switch?
The HV57908PG integrates 64 output channels, each rated to switch loads at up to 80 V with an open-drain sink current of approximately 10 mA per channel. This allows a single IC to independently control 64 high-voltage loads—such as LED segments at 48 V, EL cells, or relay coils up to 80 V—without any external transistors or level-shift circuitry on each output.
How does HV57908PG interface to a microcontroller, and how many I/O pins are required?
The HV57908PG uses a serial shift-register interface compatible with SPI, requiring only 3 microcontroller I/O pins: serial data (SDI), clock (CLK), and latch enable (LE). A 64-bit word is clocked in serially and then transferred to the parallel output latch simultaneously on the LE pulse, making the device straightforward to drive from any microcontroller with an SPI peripheral or with bit-banged GPIO running at up to several MHz.
For a 64-segment industrial display or relay sequencer, what package does HV57908PG use and how does it simplify board layout?
The HV57908PG is housed in an 80-pin QFP (quad flat pack) package, which places all 64 output pins around the perimeter with a fine pitch suitable for standard PCB manufacturing. Integrating 64 high-voltage open-drain drivers in a single 80-pin QFP eliminates the need for a bank of discrete high-voltage NPN transistors or N-channel MOSFETs—typically requiring 64 individual components plus 64 base or gate resistors—reducing the solution footprint by 80% or more compared to a discrete driver approach.
When is HV57908PG a better solution than a standard CMOS shift register plus external high-voltage transistors?
HV57908PG is the preferred choice when the load supply voltage exceeds the 5 V or 3.3 V rail that a standard logic shift register like 74HC595 can switch directly. For loads operating at 24 V, 48 V, or up to 80 V—such as plasma indicator tubes, stepper motor phase coils, or high-voltage piezo benders—using a standard shift register requires 64 external high-voltage transistors, their biasing resistors, and the associated PCB routing, whereas a single HV57908PG handles all 64 channels in one package with a 3-wire serial interface.
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