PIC16F57-I/P - 8-Bit 20MHz 3KB Flash MCU | Microchip | DIP-28
MPN: PIC16F57-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.83 | $1.83 |
| 10 | $1.65 | $16.50 |
| 100 | $1.47 | $147.00 |
| 500 | $1.31 | $655.00 |
| 1,000 | $1.18 | $1,180.00 |
PIC16F57-I/P Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, program memory (Flash/ROM), data RAM, peripheral set (timers, ADC, communication interfaces), and I/O on one die. PIC baseline microcontrollers sit at the entry level of Microchip's portfolio, above 4-bit legacy controllers and below mid-range PIC16 enhanced cores and PIC18/dsPIC33 16-bit families. The 8-bit MCU category targets cost-sensitive, deterministic embedded applications where instruction simplicity, low power, and small footprint outweigh raw throughput.
The PIC16F57 exposes 20 I/O pins across two ports (RA0-RA3 and RB0-RB7) plus dedicated OSC1/OSC2, MCLR, VDD, and VSS pins. Program memory is 3 KB Flash organized as 2K x 14 words; data RAM is 72 bytes; EEPROM is absent. A 200 ns instruction cycle at 20 MHz oscillator drives deterministic interrupt response, while the on-chip watchdog timer with its own RC oscillator adds fail-safe recovery. Reset is provided by power-on reset, brown-out detection, and watchdog time-out.
Typical applications include appliance control (washing machines, microwave ovens, HVAC), automotive body electronics (mirror controllers, lighting modules, simple sensor conditioning), industrial timers and counters, remote controls, toys, security keypads, and battery-charging controllers. The wide 2.0 V to 5.5 V supply range simplifies battery and unregulated-rail designs, while the 33 single-word instruction set keeps firmware development fast.
Designers should note the absence of an on-chip ADC, UART, and interrupts on this baseline core, which restricts use to polled, GPIO-driven logic. The 28-pin PDIP package eases breadboarding and field serviceability versus QFN alternatives. Watchdog enable/disable must be configured in configuration bits, not in firmware, and the MCLR pin must be pulled high via a 10 kohm resistor for normal operation.
Drop-in alternatives for PIC16F57-I/P — 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 PIC16F57-I/P (same form factor and footprint) — differing in Package, Program Memory Size, Timers, Watchdog Timer, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F57-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F57-E/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F54-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F57-E/SP
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →PIC16F527-I/P
✅ Drop-In✓ In Stock
$0.86 / Unit
View Datasheet →PIC16F505-I/P
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F57-I/P Maximum Ratings & Electrical Characteristics
| Architecture | PIC baseline 8-bit RISC |
| Instruction Set | 33 single-word instructions |
| Program Memory | 3 KB (2K x 14) Flash |
| Data RAM | 72 bytes |
| EEPROM | None |
| Maximum CPU Speed | 20 MHz (200 ns instruction cycle) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Operating Temperature | -40C to +85C (industrial, -I grade) |
| I/O Pins | 20 (PORTA 4-bit + PORTB 8-bit + shared) |
| Timers | 8-bit Timer0 with prescaler |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| ADC | None (no on-chip ADC) |
| UART/USART | None |
| Interrupts | None |
| Oscillator Modes | RC, XT, HS, LP external; internal oscillator not present on PIC16F57 |
| Package | 28-pin PDIP (DIP-28, 600 mil) |
| Mounting Type | Through-Hole |
| MSL Level | Not applicable (through-hole) |
| RoHS Status | Compliant (lead-free finish) |
| Brown-out Reset | Yes |
PIC16F57-I/P Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O port A bit 2 |
| Pin 2 | RA3 — Bidirectional I/O port A bit 3 (input only on some PIC16F5x) |
| Pin 3 | RA4 — Bidirectional I/O port A bit 4 (open-drain on some devices) |
| Pin 4 | MCLR — Master clear reset input, active low, connect to VDD via 10 kohm |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Bidirectional I/O port B bit 0 |
| Pin 7 | RB1 — Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 — Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 — Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 — Bidirectional I/O port B bit 4 |
| Pin 11 | RB5 — Bidirectional I/O port B bit 5 |
| Pin 12 | RB6 — Bidirectional I/O port B bit 6 |
| Pin 13 | RB7 — Bidirectional I/O port B bit 7 |
| Pin 14 | VDD — Positive supply voltage 2.0 V to 5.5 V |
| Pin 15 | OSC2 — Oscillator output, connects to crystal or resonator |
| Pin 16 | OSC1 — Oscillator input, connects to crystal, resonator, or external clock |
| Pin 17 | VDD — Positive supply voltage (secondary VDD pin) |
| Pin 18 | RA2 — Bidirectional I/O port A bit 2 (secondary pin) |
| Pin 19 | RA1 — Bidirectional I/O port A bit 1 |
| Pin 20 | RA0 — Bidirectional I/O port A bit 0 |
| Pin 21 | RA3 — Bidirectional I/O port A bit 3 (secondary pin) |
| Pin 22 | RA4 — Bidirectional I/O port A bit 4 (secondary pin) |
| Pin 23 | RA5 — Bidirectional I/O port A bit 5 |
| Pin 24 | RA6 — Bidirectional I/O port A bit 6 |
| Pin 25 | RA7 — Bidirectional I/O port A bit 7 |
| Pin 26 | VSS — Ground reference (secondary VSS pin) |
| Pin 27 | MCLR — Master clear reset input (secondary MCLR pin) |
| Pin 28 | RA0 — Bidirectional I/O port A bit 0 (secondary pin) |
Typical Applications
PIC16F57-I/P is suitable for 7 applications: Washing Machine Control Board, Microwave Oven User Interface Controller, Automotive Lighting Control Module, Remote Control Transmitter (IR/RF), Industrial Counter and Timer Module, Battery Charger Controller (Lead-Acid / NiMH), Toy and Game Console Logic.
Washing Machine Control Board
The PIC16F57-I/P's 33-instruction RISC core and 3 KB Flash fit appliance control state machines exactly. The 20 I/O pins drive motor relays, valve solenoids, water-level switches, and a 7-segment display without external mux logic. The watchdog timer and brown-out reset protect against motor-induced brown-outs on the AC mains-derived 5 V rail. The -40C to +85C industrial grade handles laundry-room temperature swings, and the wide 2.0 V to 5.5 V supply tolerates unregulated 5 V rails. Compared to a PIC16F88x with ADC, this part skips the analog front-end cost for purely digital drum-cycle, fill, drain, and spin sequencing.
Recommended
Microwave Oven User Interface Controller
A microwave oven keypad, rotary encoder, LCD/LED time display, and beeper driver map cleanly onto the PIC16F57-I/P's 20 I/O. The 3 KB Flash holds a lookup table for cooking-power presets, key debounce, and timer interrupt logic. The 200 ns instruction cycle gives sub-millisecond response to door-switch safety interlocks - critical for magnetron shutdown timing. The DIP-28 package lets service technicians desolder and replace the MCU in the field, lowering warranty repair cost. Brown-out reset catches power-line glitches during plug removal.
Recommended
Automotive Lighting Control Module
Body-electronics modules (interior dimming, DRL logic, turn-signal flashers) run on the PIC16F57-I/P's deterministic instruction cycle for accurate flash cadence. The 20 MHz CPU drives PWM-like bit-banging for fade-up/fade-down effects using Timer0 with the watchdog as a backup safety timer. The -40C to +85C industrial grade handles cabin temperatures; the extended-grade PIC16F57-E/P variant covers under-hood nodes up to +125C. The 28-pin PDIP supports conformal-coated automotive PCBs and field-replacement serviceability. Compared to PIC16F627A-I/P, the F57 saves cost by skipping unused UART/ADC peripherals in pure-logic lighting nodes.
Recommended
Remote Control Transmitter (IR/RF)
Handheld IR/RF remotes for TVs, fans, projectors, and toys need low cost, low power, and small code footprint - all matching the PIC16F57-I/P. The 3 KB Flash stores button scan tables and protocol patterns (NEC RC5, proprietary OOK). The 20 MHz clock with 200 ns instruction cycle generates 38 kHz carrier timing directly via bit-banging, eliminating an external oscillator or timer IC. The 2.0 V to 5.5 V supply runs on 2x AA or AAA cells. Brown-out reset prevents invalid IR transmits on weak batteries. No ADC or UART is needed - the design is purely polled GPIO.
Recommended
Industrial Counter and Timer Module
Panel-mount production counters, hour meters, and machine-runtime loggers benefit from the PIC16F57-I/P's 20 MHz deterministic loop and watchdog-protected Timer0. The 20 I/O pins read quadrature encoders, limit switches, and start/stop buttons, while driving 7-segment LED displays via direct GPIO. The -40C to +85C industrial temperature grade handles factory-floor heat. Brown-out reset protects event counts during power glitches. With no ADC, this fits pure-digital counters better than a PIC16F88x. The wide 2.0 V to 5.5 V supply accepts 24 V industrial rails after a regulator.
Recommended
Battery Charger Controller (Lead-Acid / NiMH)
Simple CC/CV chargers for lead-acid and NiMH battery packs use the PIC16F57-I/P to drive MOSFET gate signals via GPIO and Timer0 PWM-like bit-bang. The 3 KB Flash stores charge profile curves, temperature fold-back tables, and end-of-charge detection logic. The 2.0 V to 5.5 V supply runs from a 5 V regulator derived from the AC adapter. The watchdog timer restarts a hung charge cycle, and brown-out reset prevents over-discharge faults. Designers requiring analog sensing upgrade to PIC16F527-I/P for its on-chip 8-bit ADC.
Recommended
Toy and Game Console Logic
Cost-sensitive electronic toys, talking dolls, and tabletop game consoles rely on the PIC16F57-I/P for sub-$2 BOM cost at modest volumes. The 3 KB Flash stores sound-effect trigger tables, LED animation patterns, and button scan routines. The 20 MHz clock handles multiplexed LED matrix refresh in software without an external driver. The DIP-28 package eases through-hole assembly at contract manufacturers in low-cost regions. Compared to a PIC16F88x, the F57 eliminates unused peripherals, saving 30-50% on unit cost. Industrial temperature grade suits indoor/outdoor toy use.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F57-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F57-I/SP | PIC16F57-E/P | PIC16F54-I/P | PIC16F57-E/SP | PIC16F527-I/P | PIC16F505-I/P |
|---|---|---|---|---|---|---|---|
| Package | 28-pin PDIP (600 mil) | 28-pin SPDIP (300 mil) | 28-pin PDIP (600 mil) | 28-pin PDIP (600 mil) | 28-pin SPDIP (300 mil) | 28-pin PDIP (600 mil) | 28-pin PDIP (600 mil) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 3 KB Flash | 3 KB Flash | 3 KB Flash | 1.5 KB Flash (-50%) | 3 KB Flash | 1.5 KB Flash (-50%) | 1.5 KB Flash (-50%) |
| Data RAM | 72 bytes | 72 bytes | 72 bytes | 25 bytes (-65%) | 72 bytes | 68 bytes | 72 bytes |
| CPU Speed | 20 MHz (200 ns) | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +85C |
| ADC | None | None | None | None | None | 8-bit ADC integrated | 8-bit ADC integrated |
| Typical Unit Price (1 qty) | $1.83 | $1.85 | $2.10 | $1.40 | $2.15 | $2.20 | $1.75 |
Key Differentiators
- Largest program memory in PIC16F5x baseline DIP-28 family (vs PIC16F54-I/P)
- Cost-optimized vs PIC16F627A-I/P (vs PIC16F627A-I/P)
- Industrial temperature grade (-I) standard (vs PIC16F57-E/P)
Design Notes
The PIC16F57-I/P operates from 2.0 V to 5.5 V; place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin (pins 14 and 17), with a bulk 10 uF tantalum or aluminum cap on the same rail. Brown-out reset is enabled by configuration bit and triggers at approximately 2.0 V to 4.0 V depending on BOR configuration. The MCLR pin MUST be tied to VDD through a 10 kohm resistor with a 100 nF cap to ground for noise immunity; leaving MCLR floating causes spurious resets.
Place the 20 MHz crystal (or ceramic resonator) within 10 mm of pins 15 (OSC2) and 16 (OSC1) to minimize stray capacitance. Use short, symmetric traces and a ground plane beneath the oscillator to reduce EMI pickup. For HS oscillator mode above 4 MHz, add 10-22 pF load capacitors to ground on each OSC pin per crystal manufacturer recommendations. The DIP-28 package allows hand-soldering and field replacement, but reserve at least 2 mm clearance around the part for desoldering braid access.
Configuration bits on PIC16F5x baseline parts are NOT reprogrammable at runtime - watchdog enable/disable, oscillator mode, code protection, and brown-out thresholds must be set at device programming time. Forgetting to enable the watchdog timer in configuration bits means firmware cannot recover from code lockups. Also note: PIC16F57 has NO hardware interrupts and NO ADC - do not write ISR code expecting interrupt vectors, and use external ADC (e.g., MCP3002) for analog inputs. The watchdog RC oscillator runs independently of the main crystal.
Estimated: at 20 MHz CPU clock and 5.0 V supply, the PIC16F57-I/P draws approximately 2-3 mA active (10-15 mW). In a 28-pin PDIP package with theta_JA of approximately 80 C/W, junction temperature rises negligibly above ambient (<2 C). Even at +85C ambient, the part remains well within its 150 C absolute maximum junction rating. No heatsink or thermal management is required for typical digital GPIO control applications, but derate clock frequency above +85C ambient per the datasheet electrical characteristics.
Compliance Information
RoHS compliant per Microchip product page (lead-free matte-tin finish). The PIC16F57 is not AEC-Q100 qualified; for AEC-Q100 automotive applications, contact Microchip for PIC16F1x or PIC18 enhanced mid-range alternatives. Halogen-free status not explicitly listed in web data; mark as unknown.
