PIC16F785-E/SS
PIC16F785-E/SS - 8-bit MCU, 3.5KB Flash, 18 I/O, SSOP-20 | Microchip
The Microchip PIC16F785-E/SS is a 20-pin flash-based, 8-bit CMOS microcontroller built on the well-established mid-range PIC16 (x14) architecture, integrating two on-chip operational amplifiers, two high-speed comparators, and a dual-channel 2-phase asynchronous-feedback PWM module alongside the standard 14-bit instruction core. According to the Microchip datasheet (PDF: ~3 MB, 206 pages), the device provides 3.5 KB of self-programmable Flash program memory, 128 bytes of SRAM, and 256 bytes of EEPROM data memory, all accessible through a RISC core that executes most instructions in a single 200 ns cycle at 20 MHz. Key specifications include a wide 2.0 V to 5.5 V operating voltage, 18 general-purpose digital I/O pins, 12-bit ADC, two op-amps with rail-to-rail inputs, two comparators with programmable reference, and the integrated two-phase asynchronous-feedback PWM block suitable for digital power conversion and power-factor correction. The /E industrial temperature grade spans -40 °C to +125 °C, and the SSOP-20 (5.30 mm body) package supports reflow assembly on RoHS-compliant boards.
A PIC16 mid-range 8-bit microcontroller is a single-chip computer that combines a RISC CPU, non-volatile program memory (Flash), volatile data memory (SRAM), and a rich set of analog and digital peripherals into one IC. Within the broader taxonomy it sits under the hierarchy microcontroller -> embedded MCU -> semiconductor device, with the PIC16F785 specifically positioned for mixed-signal power-control applications where on-chip op-amps, comparators, and PWM must be tightly coupled to firmware for fast control loops.
Differentiating features of the PIC16F785 include nanoWatt Technology for ultra-low-power sleep modes, an ICD as primary analog-input channel, Master Synchronous Serial Port (MSSP) supporting SPI and I2C, an Enhanced Universal Synchronous/Asynchronous Receiver Transmitter (EUSART), and 8 MHz internal oscillator. The two integrated op-amps remove the need for external signal-conditioning stages in current-shunt amplifiers or trans-impedance front-ends. The 2-phase asynchronous-feedback PWM is engineered for bridgeless PFC and soft-switching topologies.
Architecturally, the PIC16F785 uses a Harvard-class 14-bit instruction set with an 8-bit data path, an 8-level deep hardware stack, and direct/indirect addressing modes. Analog integration reduces BOM count and PCB area. When migrating code, designers should note the interrupt structure, peripheral pin-select constraints, and oscillator configuration bits.
Typical applications include switched-mode power supplies (SMPS) with active PFC, battery chargers (CC/CV profiles), LED drivers with analog dimming, sensor signal conditioning, and low-cost industrial controls. The wide 2.0-5.5 V range enables direct battery-powered operation. Watchdog timer, brown-out reset, and Flash configuration-word protection support field-deployed reliability.
Design tip: Use the integrated op-amps to amplify current-sense shunt signals directly to the ADC, eliminating one external stage. Ensure decoupling capacitors (100 nF + 10 µF) are placed within 5 mm of VDD/AVDD pins, and route the analog AVSS separately from digital GND back to the regulator ground star.
This page synthesizes distributor pricing, drop-in SSOP-20 alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single decision-ready reference for the PIC16F785-E/SS.
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