PIC16C57C-20I/SP - 8-bit 20MHz OTP MCU, 3KB | Microchip
N.º da peça: PIC16C57C-20I/SP ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.61 | $26,10 |
| 100 | $2.3 | $230,00 |
| 500 | $2.05 | $1.025,00 |
| 1.000 | $1.85 | $1.850,00 |
PIC16C57C-20I/SP Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals on one silicon die. The PIC16C5X architecture is a RISC-style Harvard design with 33 single-word instructions, 12-bit-wide opcodes, and 8-bit-wide data paths. This results in roughly 2:1 code compression versus typical 8-bit CISC competitors in the same price class. The device sits within the broader microcontroller -> embedded MCU -> semiconductor taxonomy, and the OTP variant is intended for low-to-medium-volume production where in-system reprogrammability is not required.
Key features include 20 I/O pins, an 8-bit real-time clock/counter (TMR0) with programmable prescaler, direct/indirect/relative addressing modes, seven or eight special function hardware registers, and a power-on reset (POR) circuit. The wide 2.7V-5.5V VDD range and low-power CMOS process make the part well-suited to battery-influenced and industrial applications. The 28-pin SPDIP package is the industry-standard through-hole profile that simplifies prototyping on breadboards and through-hole production boards.
In depth, the PIC16C57C uses a 12-bit program-word, 8-bit data-path, 2-level-deep hardware stack that limits call depth (no nested interrupts by default). It supports 4 oscillator modes (RC, LP, XT, HS), allowing designers to trade cost vs frequency. Watchdog timer, power-saving SLEEP mode, and programmable code protection round out the feature set. The -20 speed grade variant guarantees 20MHz operation over the full industrial temperature range, whereas slower -04 and -10 grades are typically used for cost-sensitive designs.
Typical applications include industrial control, automotive subsystems (post-screening by customer), appliance control, low-end consumer electronics, security alarm panels, and legacy replacement designs. The 8-bit PIC16C5X core remains popular in cost-sensitive, deterministic real-time control where interrupt latency predictability is more important than raw throughput.
When designing with this part, note that OTP means firmware is committed at the time of programming and cannot be field-updated. Use the JW windowed package for prototype iteration, and consider a Flash-based PIC16F equivalent (e.g. PIC16F57) if in-application reprogrammability is needed.
This page consolidates distributor pricing, parametric drop-in alternatives within the PIC16C5X family, and practical design notes not collected in any single manufacturer document.
Alternativas drop-in para PIC16C57C-20I/SP — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC16C57C-20I/SP (mesmo formato e footprint) — diferindo em Package, Timers, Program Memory Type, Mounting Type, Instruction Execution Time.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16C57C-20/SP
✅ Drop-In✓ Em estoque
$2.18 / unidade
Ver ficha técnica →PIC16C57C-04/SP
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16F57-I/SP
✅ Drop-In✓ Em estoque
$2.6268 / unidade
Ver ficha técnica →PIC16C57C-20I/SO
✅ Drop-In✓ Em estoque
$3.62 / unidade
Ver ficha técnica →PIC16C56-20I/SP
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16C57C-20I/SP Classificações máximas e características elétricas
| Core | PIC16C5X 8-bit RISC |
| Instruction Set Width | 12-bit opcodes, 8-bit data path |
| Number of Instructions | 33 |
| Maximum CPU Frequency | 20 MHz |
| Instruction Execution Time | 200 ns (at 20 MHz) |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 3 KB (2K x 12) |
| RAM | 72 bytes |
| Hardware Stack | 2 levels |
| I/O Pins | 20 |
| Timers | 1 x 8-bit (TMR0) with prescaler |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| Temperatura de operação | -40 C to +85 C (Industrial, 'I') |
| Oscillator Modes | RC, LP, XT, HS |
| Encapsulamento | 28-pin SPDIP ('SP') |
| Tipo de montagem | Through-Hole |
| Special Features | Watchdog Timer, Power-on Reset, SLEEP mode, Code Protection |
Configuração de pinos do PIC16C57C-20I/SP
| Pino 1 | RA2 — Bidirectional I/O port A bit 2 |
| Pino 2 | RA3 — Bidirectional I/O port A bit 3 |
| Pino 3 | RTCC — TMR0 real-time clock/counter input |
| Pino 4 | MCLR — Master Clear (reset) input, active low |
| Pino 5 | VSS — Ground reference |
| Pino 6 | RB0 — Bidirectional I/O port B bit 0 (interrupt on change) |
| Pino 7 | RB1 — Bidirectional I/O port B bit 1 |
| Pino 8 | RB2 — Bidirectional I/O port B bit 2 |
| Pino 9 | RB3 — Bidirectional I/O port B bit 3 |
| Pino 10 | RB4 — Bidirectional I/O port B bit 4 |
| Pino 11 | RB5 — Bidirectional I/O port B bit 5 |
| Pino 12 | RB6 — Bidirectional I/O port B bit 6 |
| Pino 13 | RB7 — Bidirectional I/O port B bit 7 |
| Pino 14 | VSS — Ground reference |
| Pino 15 | RC7 — Bidirectional I/O port C bit 7 |
| Pino 16 | RC6 — Bidirectional I/O port C bit 6 |
| Pino 17 | RC5 — Bidirectional I/O port C bit 5 |
| Pino 18 | RC4 — Bidirectional I/O port C bit 4 |
| Pino 19 | RC3 — Bidirectional I/O port C bit 3 |
| Pino 20 | RC2 — Bidirectional I/O port C bit 2 |
| Pino 21 | RC1 — Bidirectional I/O port C bit 1 |
| Pino 22 | RC0 — Bidirectional I/O port C bit 0 |
| Pino 23 | RA0 — Bidirectional I/O port A bit 0 |
| Pino 24 | RA1 — Bidirectional I/O port A bit 1 |
| Pino 25 | OSC1 — Oscillator input |
| Pino 26 | OSC2 — Oscillator output |
| Pino 27 | VDD — Positive supply voltage |
| Pino 28 | VDD — Positive supply voltage |
Aplicações típicas
PIC16C57C-20I/SP é adequado para 6 aplicaçãos: Industrial Control Systems, Automotive Aftermarket Subsystems, Home Appliance Control, Security and Alarm Panels, Legacy Embedded Replacement, Consumer Electronics Keypads.
Industrial Control Systems
The PIC16C57C-20I/SP fits industrial control applications because of its -40C to +85C industrial temperature rating, 20 MHz deterministic 200ns instruction cycle, and 3KB of program memory for control firmware. With 20 GPIO pins and a hardware TMR0 timer, it can scan key matrices, drive relays, and service simple serial protocols without interrupt nesting overhead. The 2.7V-5.5V VDD range accepts 24V-sourced industrial rails after regulation. Compared with Flash MCUs, the OTP PIC16C57C-20I/SP reduces per-unit cost in high-volume machine controllers where firmware is locked at production. Its 2-level hardware stack keeps the C interrupt-free model simple for PLC-style sequential control loops.
Recomendado
Automotive Aftermarket Subsystems
The PIC16C57C-20I/SP suits automotive aftermarket subsystems such as alarm modules, lighting controllers, and accessory timers because the 'I' (industrial) temperature grade covers under-dash thermal environments (-40C to +85C). Its 20MHz clock enables accurate timing for turn-signal flashers, wiper interval controllers, and seat-memory sequencing, while the 3KB OTP program memory holds enough logic for these state-machine designs. Engineers should note the part is not AEC-Q100 qualified; for OEM automotive designs use PIC16F1xxx or dsPIC33 families. Compared with discrete 555-timer logic, the PIC16C57C-20I/SP reduces board area and improves timing accuracy for automotive aftermarket designs.
Recomendado
Home Appliance Control
The PIC16C57C-20I/SP is well suited to home appliance control boards including washing-machine sub-controllers, microwave keypads, dishwasher timers, and refrigerator user-interface panels. Its 20 I/O pins multiplex key-scan inputs and segment/LED driver outputs, while the 8-bit TMR0 generates reliable timebases for wash-cycle sequencing. The 2.7V-5.5V operating range accepts rectified-and-regulated mains-derived supplies typical in white goods. The OTP memory model keeps per-unit BOM cost low for high-volume appliance production. Designers prefer the PIC16C57C-20I/SP over Flash parts when firmware is locked at manufacturing and BOM cost is the primary driver.
Recomendado
Security and Alarm Panels
The PIC16C57C-20I/SP powers security alarm panels, PIR motion-detector control boards, and basic access-control keypads. Its deterministic 200ns instruction cycle handles keypad scanning and reed-switch debouncing in real time without RTOS overhead, while the 72-byte RAM retains zone state and timing buffers. The 2-level hardware stack matches the single-tasking model typical of alarm panels, where deterministic event sequencing outweighs the need for deep subroutine nesting. Compared with discrete CMOS logic, the PIC16C57C-20I/SP integrates the entire alarm controller on a single 28-pin SPDIP, reducing PCB size and assembly cost.
Recomendado
Legacy Embedded Replacement
The PIC16C57C-20I/SP serves as a drop-in replacement for discontinued or end-of-life 8-bit microcontrollers in legacy embedded designs. With Microchip's long-term PIC16C5X family support, the part continues to be available for legacy industrial, military-customer, and medical-device designs requiring exact re-creation of original firmware behavior. The OTP memory preserves bit-exact firmware identity - a key requirement for FDA-cleared or FAA-certified legacy products that cannot tolerate firmware changes. Compared with newer Flash MCUs, the PIC16C57C-20I/SP guarantees that the legacy design's compile output is reproducible without requiring new firmware certification.
Recomendado
Consumer Electronics Keypads
The PIC16C57C-20I/SP is commonly used in consumer electronics keypads for toys, remote controllers, and entry-level remote-control devices. Its 20MHz clock and 8-bit architecture efficiently handle key matrix scanning, IR carrier generation, and simple state machines for handheld devices. The OTP memory locks firmware at production, preventing unauthorized firmware cloning - a feature valued by consumer OEMs. Compared with 32-bit ARM Cortex-M0+ alternatives, the PIC16C57C-20I/SP delivers much lower unit cost and simpler toolchain for high-volume consumer products where MCU capabilities exceed raw performance requirements.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16C57C-20I/SP — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16C57C-20/SP | PIC16C57C-04/SP | PIC16F57-I/SP | PIC16C56-20I/SP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SPDIP | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same |
| Program Memory | 3 KB (2K x 12) OTP | 3 KB OTP | 3 KB OTP | 3 KB Flash | 1 KB OTP (-67%) |
| Max Clock Frequency | 20 MHz | 20 MHz | 4 MHz (-80%) | 20 MHz | 20 MHz |
| Instruction Cycle | 200 ns | 200 ns | 1000 ns (+400%) | 200 ns | 200 ns |
| RAM | 72 bytes | 72 bytes | 72 bytes | 72 bytes | 72 bytes |
| Temperature Range | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Programming Type | OTP (One-Time) | OTP | OTP | Flash + ICSP | OTP |
| Pin Count | 28 | 28 | 28 | 28 | 28 |
Principais diferenciais
- Industrial temperature grade with OTP memory (vs PIC16C57C-20/SP)
- In-system reprogrammability via Flash variant (vs PIC16F57-I/SP)
- Larger program memory than PIC16C56 family (vs PIC16C56-20I/SP)
Notas de projeto
The PIC16C57C-20I/SP operates from 2.7V to 5.5V VDD. Decouple VDD (pin 27/28) with a 100nF ceramic capacitor placed within 5mm of the supply pins, plus a 10uF tantalum or aluminum bulk capacitor. Respect the VDD rise-time specification (typically <1V/ms for reliable POR); if rise time exceeds the spec, the part may enter undefined states. Use a supervisor IC or the built-in POR for applications with slow-ramping supplies.
Select the correct oscillator mode in the configuration word: RC for low-cost resistor/capacitor timing (not recommended above 4MHz), LP for low-power 32kHz crystals, XT for 100kHz-4MHz crystals, and HS for 4MHz-20MHz crystals. At 20MHz (HS mode), use a fundamental-mode crystal with load capacitors sized per the crystal manufacturer's CL specification (typically 15-33pF). Add a series resistor if overtone-mode crystals are accidentally selected to prevent oscillator startup failure.
Place the MCLR pull-up resistor (typically 10k) close to pin 4, and the decoupling capacitor near VDD (pin 27/28). Route the OSC1/OSC2 traces short and away from high-current switching nodes to prevent clock corruption. Use a guard ring around the oscillator traces if switching signals (relay coils, MOSFET drivers) are nearby. Keep the trace from MCLR to the IC short (<20mm) to prevent ESD coupling into the reset line.
The PIC16C5X architecture has only a 2-level hardware stack, so it cannot support nested subroutine calls beyond depth 2. Plan your firmware call graph accordingly or use in-line code for deeper paths. The OTP memory is one-time programmable - any bit error or firmware revision requires a new device, so always validate firmware with a JW windowed device or a PIC16F57 (Flash) prototype before committing to OTP production. Configuration-word bits control oscillator mode and code protection and must be programmed correctly or the device may appear dead.
Informações de conformidade
RoHS, REACH, lead-free, halogen-free, and conflict-minerals compliance status were not present in the verified web data and require verification against Microchip's product compliance declarations.
