PIC16F57T-I/SO - 8-Bit 20MHz 3KB Flash MCU | Microchip | 28-SOIC
MPN: PIC16F57T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.23 | $1.23 |
| 10 | $1.1 | $11.00 |
| 100 | $0.93 | $93.00 |
| 500 | $0.78 | $390.00 |
| 1,000 | $0.65 | $650.00 |
PIC16F57T-I/SO Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, memory (Flash/ROM for program storage, RAM for data), and programmable I/O peripherals on one IC. The PIC16F57 belongs to Microchip's mid-range 8-bit PIC16 family and uses a RISC-based Harvard architecture with 33 single-word instructions and 12-bit-wide opcodes delivering roughly 2:1 code compression versus other 8-bit MCUs in its class. Within the broader component taxonomy, PIC16F57 sits under microcontroller -> 8-bit MCU -> embedded controller -> semiconductor IC -> Integrated Circuit. Its 12-bit instruction width is a hallmark of the PIC16F5X baseline family, distinguishing it from PIC16F1xxx enhanced 14-bit devices and PIC18 16-bit-instruction parts.
Key features include 72 bytes of RAM, three hardware timers, a watchdog timer, 20 digital I/O lines, in-circuit serial programming (ICSP), and an integrated power-on reset. The PIC16F57T-I/SO is supplied in tape-and-reel (T = T&R suffix) for high-volume manufacturing, the -I grade parts operate across -40 C to +85 C industrial temperatures, and the SO package (SO = 28-SOIC) offers 0.295 inch (7.50 mm) body width for standard through-hole-compatible surface-mount assembly.
In-circuit debug and code protection are supported per Microchip device specifications. Compared with PIC16F1xxx enhanced mid-range parts, the PIC16F57 lacks interrupts, ADC, and PWM peripherals, which makes it ideal for deterministic polled-loop control. The 20 MHz oscillator drives a 5 MIPS core from a 4T clock, balancing responsiveness with ultra-low sleep currents for always-on remote-sensor nodes.
Typical applications include automotive sensor conditioning, industrial control logic, appliance user-interface panels, low-cost remote controls, security-system keypads, and LED display drivers. The wide supply range (2.0-5.5V) allows direct connection to single-cell Li-ion or 4xAA battery stacks.
Designers should connect VDD to a 100 nF decoupling capacitor placed within 5 mm of the pin and route MCLR through a 10 kohm pull-up. For production programming, reserve the ICSP pins (RB6/RB7) and ensure the trace geometry avoids capacitive loading on the oscillator pins.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for evaluating the PIC16F57T-I/SO in new designs and as a pin-compatible upgrade or replacement.
Drop-in alternatives for PIC16F57T-I/SO — 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 PIC16F57T-I/SO (same form factor and footprint) — differing in Package, Operating Temperature, Timers, I/O Pins, Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F57-I/SO
✅ Drop-In✓ In Stock
$1.21 / Unit
View Datasheet →PIC16F57T-E/SO
✅ Drop-In✓ In Stock
$0.78 / Unit
View Datasheet →PIC16F57-I/P
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16F57-E/SP
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →PIC16F54T-I/SS
✅ Drop-In✓ In Stock
$0.34 / Unit
View Datasheet →PIC16F57T-I/SO Maximum Ratings & Electrical Characteristics
| Architecture | PIC16 (8-bit, Harvard, RISC) |
| Core | PIC16C5X baseline, 12-bit instruction word |
| Instruction Set | 33 single-word instructions |
| Program Memory Type | FLASH |
| Program Memory Size | 3 KB (2K x 12) |
| RAM | 72 bytes |
| CPU Speed | 20 MHz (200 ns instruction cycle, 5 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 20 |
| Timers | 3 (8-bit) |
| Watchdog Timer | Yes |
| ADC | None |
| PWM Channels | 0 (none) |
| Interrupts | No (polled architecture) |
| In-Circuit Serial Programming (ICSP) | Yes |
| Operating Temperature (I grade) | -40 C to +85 C |
| Package | 28-SOIC (7.50 mm / 0.295 in body width) |
| Mounting Type | Surface Mount |
| MSL Level | MSL3 (JEDEC J-STD-020) |
| Lead-Free / RoHS | Yes, RoHS compliant (per Microchip product page) |
| AEC-Q100 Automotive Qualified | Not qualified |
PIC16F57T-I/SO Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.0-5.5 V) |
| Pin 2 | RA0 — Bidirectional I/O, PORTA bit 0 |
| Pin 3 | RA1 — Bidirectional I/O, PORTA bit 1 |
| Pin 4 | RA2 — Bidirectional I/O, PORTA bit 2 |
| Pin 5 | RA3 — Bidirectional I/O, PORTA bit 3 |
| Pin 6 | RC0 — Bidirectional I/O, PORTC bit 0 |
| Pin 7 | RC1 — Bidirectional I/O, PORTC bit 1 |
| Pin 8 | RC2 — Bidirectional I/O, PORTC bit 2 |
| Pin 9 | RC3 — Bidirectional I/O, PORTC bit 3 |
| Pin 10 | RC4 — Bidirectional I/O, PORTC bit 4 |
| Pin 11 | RC5 — Bidirectional I/O, PORTC bit 5 |
| Pin 12 | RC6 — Bidirectional I/O, PORTC bit 6 |
| Pin 13 | RC7 — Bidirectional I/O, PORTC bit 7 |
| Pin 14 | VSS — Ground reference |
| Pin 15 | RB0 — Bidirectional I/O, PORTB bit 0 / INT |
| Pin 16 | RB1 — Bidirectional I/O, PORTB bit 1 |
| Pin 17 | RB2 — Bidirectional I/O, PORTB bit 2 |
| Pin 18 | RB3 — Bidirectional I/O, PORTB bit 3 |
| Pin 19 | RB4 — Bidirectional I/O, PORTB bit 4 |
| Pin 20 | RB5 — Bidirectional I/O, PORTB bit 5 |
| Pin 21 | RB6 — Bidirectional I/O, PORTB bit 6 / ICSP clock |
| Pin 22 | RB7 — Bidirectional I/O, PORTB bit 7 / ICSP data |
| Pin 23 | T0CKI — Timer0 external clock input |
| Pin 24 | OSC2 — Oscillator output / Fosc/4 clock out |
| Pin 25 | OSC1 — Oscillator input / external clock in |
| Pin 26 | MCLR — Master clear reset (active low) |
| Pin 27 | VDD — Positive supply voltage (2.0-5.5 V) |
| Pin 28 | VSS — Ground reference |
Typical Applications
PIC16F57T-I/SO is suitable for 6 applications: Automotive Sensor Conditioning, Industrial Control Logic Replacement, Appliance User-Interface Panels, Low-Cost Remote Control Transmitters, Security System Keypads and Sensors, LED Display and Signage Drivers.
Automotive Sensor Conditioning
The PIC16F57T-I/SO fits automotive sensor-conditioning nodes that require a small, deterministic MCU between a 5 V regulated rail and a sensor front-end. With 3 KB FLASH, 72 bytes RAM, 20 MHz core, and 20 digital I/O lines, it can run polled multiplex routines for up to 16 push-button or Hall-effect inputs without an OS or interrupt scheduler. Its 2.0-5.5 V VDD accepts 12 V battery-derived rails after pre-regulation. The polled architecture yields bounded worst-case latency of one instruction cycle (200 ns) per scan step, critical for ABS or seat-position sensor feedback where jitter must stay under 1 ms. Compared with interrupt-driven PIC16F1xxx parts, the F57's simpler execution model reduces firmware certification cost for ISO 26262 ASIL-A nodes and lets one engineer own both hardware and software.
Recommended
Industrial Control Logic Replacement
Industrial PLC drop-in retrofits and discrete-logic replacement modules benefit from PIC16F57T-I/SO because the 28-SOIC footprint lets it slide directly onto legacy 74HC-series PCBs after a 5 V-only redesign. The 33-instruction RISC core and 5 MIPS throughput handle ladder-logic emulation at scan times under 5 ms for typical 32-rung programs. Its three 8-bit timers deliver independent debounce, blink, and watchdog functions in one chip, reducing BOM count from four discrete logic ICs to one. The wide 2.0-5.5 V supply tolerance also lets it ride through 24 V industrial bus transients after a single LDO stage, ideal for machine-tool pendant controllers and conveyor-tally counters.
Recommended
Appliance User-Interface Panels
Front-panel button scanning, LED multiplexing, and 7-segment display refresh are bread-and-butter tasks for the PIC16F57T-I/SO. With 20 I/O pins, three 8-bit timers, and 72 bytes RAM it can scan a 4x4 matrix keypad plus drive an 8-digit LED display without an external driver IC. The 200 ns instruction cycle keeps display refresh above 100 Hz, eliminating visible flicker, while the 3 KB FLASH stores icon tables and buzzer-pattern waveforms. Operating directly from a 3.3 V or 5 V appliance rail simplifies EMC compliance versus a higher-speed MCU whose switching edges couple into nearby power stages.
Recommended
Low-Cost Remote Control Transmitters
Battery-powered IR or sub-GHz RF remote controls use the PIC16F57T-I/SO because its polled 8-bit core, 20 I/O, and wide 2.0-5.5 V supply let it run directly from a single CR2032 cell without an LDO. The 3 KB FLASH stores button mapping, device-pairing tables, and rolling-code algorithms for up to 64 buttons. Watchdog timer and POR guarantee recovery from brown-out on weak cells; the 33-instruction RISC core yields 5 MIPS at 20 MHz, fast enough to generate 38 kHz IR carrier with tight duty-cycle control. Compared with PIC16F1xxx alternatives, the F57's small die and simple decoder reduce quiescent current by ~30 percent.
Recommended
Security System Keypads and Sensors
Wired security keypads, PIR sensor nodes, and door/window contact modules use the PIC16F57T-I/SO for its low cost, deterministic scan, and 5 V tolerance on long cable runs. Twenty I/O pins scan a 4x4 keypad plus four zone inputs and three LED indicators without external mux ICs. The watchdog timer plus brown-out reset ensure reliable recovery if a tamper switch shorts the supply, while the 3 KB FLASH stores encrypted zone-event logs. The 28-SOIC package's standard 7.50 mm body fits existing keypad PCBs without layout rework, easing retrofit into legacy panels.
Recommended
LED Display and Signage Drivers
Small-format LED matrix signs, traffic arrows, and price-channel markers run on PIC16F57T-I/SO with Charlieplexing or multiplexing. With 20 I/O lines and three timers the chip can Charlieplex up to 80 LEDs (with software-driven scan) or multiplex an 8-digit 7-segment plus 8-status-LED array. The 200 ns instruction cycle and 3 KB FLASH accommodate lookup-table-driven font rendering and PWM dimming via timer interrupts simulated in polled loops. Operating from a 5 V rail, the I/O pins can sink 25 mA each (per port), driving low-current LEDs directly without driver transistors in cost-sensitive designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F57T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F57-I/SO | PIC16F57T-E/SO | PIC16F57-I/P | PIC16F57-E/SP | PIC16F54T-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC pin-compatible (PDIP-28 mech) | 28-SOIC pin-compatible (SPDIP-28 mech) | 28-SOIC pinout (SSOP-28 mech - verify land pattern) |
| Program Memory (FLASH) | 3 KB (2K x 12) | 3 KB | 3 KB | 3 KB | 3 KB | 768 B (-74%) |
| RAM | 72 bytes | 72 B | 72 B | 72 B | 72 B | 25 B (-65%) |
| CPU Speed | 20 MHz (5 MIPS) | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Temperature | -40 C to +85 C (I grade) | -40 to +85 C | -40 to +125 C (E grade) | -40 to +85 C | -40 to +125 C (E grade) | -40 to +85 C |
| Interrupts / ADC / PWM | None (polled) | None | None | None | None | None |
| Packaging (shipping form) | Tape & Reel | Tube | Tape & Reel | Tube | Tube | Tape & Reel |
Key Differentiators
- Largest FLASH and RAM in PIC16C5X baseline family (vs PIC16F54T-I/SS)
- Tube-package variant available for hand-build and prototyping (vs PIC16F57T-I/SO (T&R only))
- Extended-temperature E-grade drop-in available (vs PIC16F57T-I/SO (I grade))
Design Notes
Place a 100 nF (0.1 uF) low-ESR ceramic decoupling capacitor on each VDD pin (pin 1 and pin 27 on 28-SOIC) with the trace length kept under 5 mm; pair with a single 10 uF bulk tantalum or ceramic capacitor on the main 5 V rail. For battery-powered designs, use a 10 kohm pull-up on MCLR (pin 26) to prevent spurious resets during slow VDD ramp-up; this avoids the brown-out reset re-entering sleep mode at low cell voltage.
Route OSC1 (pin 25) and OSC2 (pin 24) traces as short as possible and guard them with a ground pour to minimize capacitive coupling from switching I/O. If a crystal is used, place load capacitors within 3 mm of the oscillator pins and connect the crystal case to ground. Reserve RB6 (pin 21) and RB7 (pin 22) for ICSP; do not place series resistors above 100 ohm on these lines, or in-circuit programming may fail at production.
The PIC16F57T-I/SO uses 12-bit program words, not 14-bit - ensure your toolchain is configured for the PIC16C5X baseline instruction set. Do not attempt to interrupt-driven code from PIC16F1xxx examples directly; the F57 has no interrupt controller, and any reference to GIE/PEIE/T0IE registers will fail to assemble. If interrupts are required, step up to PIC16F1938-I/SO (28-SOIC) which is pin-compatible but adds interrupt, ADC, and PWM peripherals.
Estimated: at 20 MHz / 5 V the PIC16F57T-I/SO draws approximately 11 mA active and 4 uA sleep per Microchip datasheet 30412F. With SOIC-28 theta_JA of ~80 C/W, power dissipation at full active load is ~55 mW, yielding a junction temperature rise of ~4.4 C above ambient - well within the 85 C I-grade ceiling. In enclosed housings above 60 C ambient, however, derate oscillator frequency to 16 MHz to keep supply current below 9 mA.
Compliance Information
RoHS and lead-free per Microchip product page; AEC-Q100 NOT qualified (choose PIC16F57T-E/SO for extended-temperature, but it is also not AEC-Q100 qualified - automotive applications should select PIC16F1xxx AEC-Q100 parts).
