PIC16HV785-I/SS
PIC16HV785-I/SS - 20MHz 8-bit MCU 3.5KB Flash 20-SSOP | Microchip
The Microchip Technology PIC16HV785-I/SS is an 8-bit PIC mid-range microcontroller with 3.5KB (2K x 14) of Flash program memory, 128 bytes of RAM, and 18 digital I/O pins, housed in a 20-pin SSOP package. The "HV" prefix indicates an integrated shunt voltage regulator, enabling direct operation from a 2.0V-15V supply without external regulation. The device runs at up to 20 MHz instruction rate and includes dual operational amplifiers, dual high-speed comparators, an Enhanced Capture/Compare/PWM module, and a Two-Phase Asynchronous Feedback PWM controller on-chip.
An 8-bit microcontroller (MCU) is a small computer-on-a-chip that integrates a CPU, program memory (Flash/ROM), data memory (RAM), and peripheral interfaces on a single die. Within the broader taxonomy, the PIC16HV785 sits in the 8-bit MCU class, which belongs to the microcontroller family, itself a subcategory of microcontrollers -> microprocessors -> digital ICs -> semiconductors. 8-bit MCUs dominate cost-sensitive, low-power, deterministic-control applications such as motor drive, lighting, and simple sensor conditioning because they offer predictable instruction timing, low current draw, and easy programming via the ICSP interface.
Key features include one 10-bit ADC with 14 channels, one 8-bit ADC with 14 channels, two op-amps with 3 MHz gain bandwidth, two comparators with a 40 ns response time, an internal 31 kHz oscillator, and a hardware Two-Phase Asynchronous Feedback PWM block targeting switch-mode power supply (SMPS) and full-bridge converter topologies. The integrated shunt regulator accepts 2.0V-15V at the HV pin and delivers a regulated 3.3V or 5V (selectable via CONFIG) to the internal logic, simplifying power design in battery and bus-powered systems.
The PIC16HV785 architecture implements the Microchip mid-range 14-bit instruction set with a single accumulator W and a 16-deep hardware stack. Peripherals share I/O pins via PPS-like multiplexers; the on-chip op-amps can be cascaded with the PWM comparators to implement current-mode control loops with no external analog components.
Typical applications include primary-side control of AC-DC or DC-DC converters, LED lighting drivers, battery chargers, BLDC motor commutation, and industrial sensor signal conditioning. Because the "HV" variant integrates a shunt regulator, it is preferred over the non-HV PIC16F785 in 12V bus designs.
When designing with this part, ensure the HV supply current limit resistor is sized per the datasheet's shunt regulator curve, otherwise the regulator will enter foldback. For SMPS designs, the Two-Phase Asynchronous Feedback PWM block requires external MOSFET drivers because the GPIO cannot directly drive power FETs above a few hundred milliamps.
This page consolidates distributor stock, parametric drop-in equivalents, and application guidance synthesized from the Microchip PIC16HV785 datasheet, Mouser/DigiKey listings, and PIC family reference designs.
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