PIC16F77T-I/PT - 8-Bit PIC MCU, 14KB Flash, 20MHz, 44-TQFP | Microchip
MPN: PIC16F77T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.9 | $8.90 |
| 10 | $8.21 | $82.10 |
| 100 | $7.42 | $742.00 |
| 500 | $6.8 | $3,400.00 |
| 1,000 | $6.25 | $6,250.00 |
PIC16F77T-I/PT Overview
Background: A PIC (Peripheral Interface Controller) microcontroller is a Harvard-architecture 8-bit MCU family originally developed by General Instrument and now owned by Microchip Technology. The PIC16F series sits in the mid-range PIC tier, distinguished from baseline PIC10/12/14 and high-end PIC18 families, and belongs to the broader category of embedded microcontrollers (MCU -> microcontroller -> embedded processor -> semiconductor). It is widely used in industrial control, sensor interfacing, and white-goods applications where deterministic instruction timing and small footprint matter more than raw compute throughput.
Key features include a 14-bit instruction word, 35 single-word instructions, eight channels of 8-bit Analog-to-Digital conversion with two additional input channels, up to 33 digital I/O pins, USART, MSSP (SPI/I2C), PWM, capture/compare, and two 8-bit timers plus one 16-bit timer. Brown-out Reset (BOR), Power-On Reset (POR), watchdog timer, and In-Circuit Serial Programming (ICSP) round out the safety and debug feature set required for unattended industrial deployment.
Architecture: The PIC16F77T-I/PT uses a 14-bit wide program memory bus and an 8-bit data bus with 14 special-function hardware registers. Programmable interrupt vectoring and an 8-level hardware stack support real-time event handling. The device operates from 2.0 V to 5.5 V (extended) or 4.0 V to 5.5 V (standard), enabling designs that must survive brown-out and noisy supply rails typical of motor and solenoid switching environments.
Typical applications include industrial control panels, sensor-interface front ends, low-frequency data acquisition, motor-control co-processors, instrumentation, and consumer appliance control. The wide supply tolerance and built-in A/D channel count make it suitable for systems that read several analog sensors while driving relays, LEDs, or other digital loads.
Design consideration: When laying out a 44-TQFP PCB, reserve a ground pour under the exposed pad for thermal relief, place decoupling capacitors within 5mm of the VDD pins, and assign each analog A/D input its own dedicated AGND return path to preserve conversion linearity. The -I suffix indicates the industrial temperature grade (-40C to +85C).
This page synthesizes distributor pricing, package-pinned drop-in alternatives from across the PIC16F7x family, and practical PCB design notes not aggregated in a single place on the manufacturer website.
Drop-in alternatives for PIC16F77T-I/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16F77T-I/PT (same form factor and footprint) — differing in Package, Timers, Core Architecture, ADC, Communication.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F77T-E/PT
✅ Drop-In✓ In Stock
$6.08 / Unit
View Datasheet →PIC16F77T-I/L
✅ Drop-In✓ In Stock
$6.95 / Unit
View Datasheet →PIC16F777T-I/PT
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →PIC16F74T-I/PT
✅ Drop-In✓ In Stock
$5.21 / Unit
View Datasheet →PIC16F767T-I/SS
✅ Drop-In✓ In Stock
$4.18 / Unit
View Datasheet →PIC16F77T-I/PT Maximum Ratings & Electrical Characteristics
| Product Type | 8-Bit Microcontroller (MCU) |
| Series | PIC16 |
| Core Architecture | PIC 8-Bit RISC (Harvard) |
| Program Memory | 14 KB (8K x 14) FLASH |
| RAM | 368 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 20 MHz (200 ns instruction cycle) |
| Instruction Set | 35 single-word instructions, 14-bit wide |
| I/O Pins | 33 |
| A/D Converter | 8 channels, 8-bit (plus 2 additional inputs) |
| Timers | Two 8-bit + One 16-bit |
| Communication Peripherals | USART, MSSP (SPI / I2C) |
| Operating Voltage | 4.0 V to 5.5 V (standard); 2.0 V to 5.5 V (extended) |
| Operating Temperature | -40C to +85C (Industrial grade, -I) |
| Package | 44-pin TQFP (10 mm x 10 mm) |
| Mounting Type | Surface Mount |
| Programming Interface | ICSP (In-Circuit Serial Programming) and ICD |
| RoHS Status | Compliant |
PIC16F77T-I/PT Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage input |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / Analog input channel 2 |
| Pin 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input channel 3 / ADC reference |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input (open drain) |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / Analog input channel 4 / SPI slave select |
| Pin 8 | RE0/RD/AN5 — PORTE bit 0 / Parallel port Read control / Analog input channel 5 |
| Pin 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel port Write control / Analog input channel 6 |
| Pin 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel port Chip Select / Analog input channel 7 |
| Pin 11 | VDD — Positive digital supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKI — Oscillator crystal input / External clock input |
| Pin 14 | OSC2/CLKO — Oscillator crystal output / Clock output |
| Pin 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / Capture/Compare/PWM2 |
| Pin 17 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM1 |
| Pin 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Pin 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Pin 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Pin 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Pin 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK — PORTC bit 6 / USART asynchronous transmit / SPI clock |
| Pin 26 | RC7/RX/DT — PORTC bit 7 / USART asynchronous receive / SPI data |
| Pin 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Pin 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Pin 29 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Pin 30 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive digital supply voltage |
| Pin 33 | RB0/INT — PORTB bit 0 / External interrupt input |
| Pin 34 | RB1 — PORTB bit 1 |
| Pin 35 | RB2 — PORTB bit 2 |
| Pin 36 | RB3/PGM — PORTB bit 3 / ICSP programming data |
| Pin 37 | RB4 — PORTB bit 4 |
| Pin 38 | RB5 — PORTB bit 5 |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 41 | AVSS — Analog ground reference |
| Pin 42 | AVDD — Analog positive supply voltage |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
Typical Applications
PIC16F77T-I/PT is suitable for 6 applications: Industrial Sensor Interface Front End, Consumer Appliance Controller (Washing Machine / Microwave), HVAC Control System, Low-Frequency Data Acquisition Module, Motor Control Co-Processor, Educational / Development Platform (PIC Trainer Board).
Industrial Sensor Interface Front End
The PIC16F77T-I/PT's 8+2 channel 8-bit ADC at up to 20 MHz (5 MIPS) makes it suitable for multi-sensor industrial interface panels. Placed on a 44-TQFP motherboard, it reads up to eight analog sensors (temperature via NTC, pressure via bridge, current via shunt) while its USART drives an RS-485 transceiver back to a master PLC. The 2.0 V-5.5 V supply window tolerates brown-out conditions common on factory floors, and the -40C to +85C industrial grade supports cabinet-less deployment.
Recommended
Consumer Appliance Controller (Washing Machine / Microwave)
A washing machine or microwave oven control board benefits from the PIC16F77T-I/PT's 33 I/O pins driving triacs, relays, and seven-segment LEDs while the 8-channel ADC samples water level, humidity, or temperature probes. At 20 MHz the core handles button debouncing, PWM motor speed control through the CCP module, and real-time scheduling without an RTOS. Tape-and-reel packaging supports high-throughput SMT assembly at appliance-tier cost targets.
Recommended
HVAC Control System
In rooftop or indoor HVAC controllers, the PIC16F77T-I/PT serves as the master control loop device thanks to its 14 KB FLASH (enough for full state-machine + PID code), 8-channel ADC for thermistor and pressure transducer inputs, and MSSP peripheral for I2C temperature/humidity sensor expansion. Its -40C to +85C industrial range survives unconditioned mechanical-room environments, and the 44-TQFP footprint has the thermal headroom needed to dissipate up to 750 mW with proper copper pours.
Recommended
Low-Frequency Data Acquisition Module
Multi-channel low-frequency data loggers pair well with the PIC16F77T-I/PT because the 8-channel 8-bit ADC handles battery-cell monitoring, slow transducer reads, and alarm thresholds. The 256-byte EEPROM stores calibration constants and event timestamps without needing an external memory IC, while the 368-byte RAM buffers sample blocks for SD-card offload through MSSP. The 14 KB FLASH holds full modbus or CANopen firmware for distributed sensor nodes.
Recommended
Motor Control Co-Processor
The PIC16F77T-I/PT is used as a dedicated co-MCU in dual-core or DSP/microcontroller motor-control designs, offloading current sensing, fault detection, and operator-panel I/O from a larger dsPIC or PIC32 host. The CCP and PWM peripherals drive the gate-driver logic at low to mid switching frequencies (under 25 kHz) for BLDC, stepper, or universal motors. Its deterministic 200 ns instruction cycle keeps the control loop quantization below 1 percent, which is critical for smooth torque ripple.
Recommended
Educational / Development Platform (PIC Trainer Board)
University coursework, hobbyist projects, and mid-school robotics trainers frequently target the PIC16F77T-I/PT because the 44-TQFP footprint offers access to all 33 I/O on a 0.1-inch-friendly breakout and the 14 KB FLASH holds realistic curriculum-sized programs. The 8-bit PIC16F instruction set remains the standard reference for embedded-systems pedagogy. ICSP support means a low-cost PICkit 3/4 in-circuit debugger handles both programming and real-time debugging directly on the trainer board.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F77T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F77T-E/PT | PIC16F777T-I/PT | PIC16F74T-I/PT | PIC16F767T-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Program Memory (FLASH) | 14 KB | 14 KB - same | 14 KB - same | 7 KB (-50%) | 14 KB - same |
| RAM | 368 bytes | 368 bytes - same | 368 bytes - same | 192 bytes (-48%) | 360 bytes (-2%) |
| EEPROM | 256 bytes | 256 bytes - same | 256 bytes - same | 128 bytes (-50%) | 256 bytes - same |
| Maximum CPU Frequency | 20 MHz | 20 MHz - same | 20 MHz - same | 20 MHz - same | 20 MHz - same |
| ADC Channels | 8 (+ 2 extra) | 8 (+ 2 extra) - same | 14 (+ 2 extra, 12-bit) | 5 (+ 2 extra) | 5 (+ 1 extra, 12-bit) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| I/O Pins | 33 | 33 - same | 36 (+3) | 33 - same | 28 (-5) |
Key Differentiators
- Industrial temperature grade -40C to +85C standard (vs PIC16F767T-I/SS)
- 8 channels of 8-bit ADC plus 2 additional analog inputs (vs PIC16F74T-I/PT)
- Mature, low-cost volume pricing tape-and-reel PIC16F7x baseline (vs PIC16F77T-E/PT)
Design Notes
Place decoupling capacitors (0.1 uF ceramic in parallel with 10 uF tantalum or ceramic bulk) within 5 mm of each VDD pin (pins 11 and 32) and the AVDD pin (pin 42). Connect the AVSS pin (pin 41) to a single ground point shared only with the analog input traces. Keep analog traces short and away from digital switching nodes (PWM, SPI clock) to preserve ADC linearity, as recommended in the PIC16F7x datasheet section on analog design.
The 44-pin TQFP has a 0.80 mm pitch and a 10 mm x 10 mm body; reserve at least 12 mm x 12 mm of board area including the silk-screen keepout. Route MCLR/VPP (pin 1) and OSC1/OSC2 (pins 13/14) with short traces - long traces here cause MCLR noise sensitivity and crystal oscillator jitter. The 44-TQFP has no exposed thermal pad, but for designs approaching 750 mW dissipation a copper-pour heat-spreader under the package lowers theta-JA by 15-25 percent.
Do not exceed 5.5 V on VDD - the PIC16F7x device is rated 2.0 V-5.5 V (LF variant) or 4.0 V-5.5 V (standard). Configure A/D conversion clock Fosc/32 or slower to avoid violating the minimum TAD specification in the datasheet. Enable brown-out reset (BOR) in the configuration word to prevent code execution under voltage noise transients that could corrupt the program counter. Do not drive RA4 (open-drain) without an external pull-up resistor.
Compliance Information
RoHS compliant per Microchip product documentation. Not AEC-Q100 qualified - choose an automotive-grade PIC16F variant or migrate to a PIC18F or dsPIC30F automotive part for vehicle applications.
