PIC16C56A-20E/SO - 8-bit OTP MCU, 1.5KB, 20MHz, SOIC-18 | Microchip
MPN: PIC16C56A-20E/SO ✓ Hoạt độngPIC16C56A-20E/SO Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and peripherals such as I/O ports and timers. PIC16C5X devices are OTP (One-Time-Programmable) EPROM-based MCUs designed for cost-sensitive embedded applications. Within the broader semiconductor taxonomy, the PIC16C56A belongs to the hierarchy MCU -> microcontroller -> embedded processor -> semiconductor IC, and uses the classic PIC RISC architecture with 12-bit-wide instructions for approximately 2:1 code density versus typical 8-bit CISC cores.
Key specifications include 1.5 KB of OTP program memory (1K x 12), 25 bytes of RAM, 12 digital I/O pins, two 8-bit timers, an instruction cycle time of 200 ns at 20 MHz, and a wide 3.0 V to 5.5 V operating voltage range. The 'E' suffix designates the extended industrial temperature grade (-40C to +125C). The SOIC-18 surface-mount package simplifies board assembly and reflow soldering versus the original PDIP variants.
Architecturally, the PIC16C56A uses a Harvard-style RISC core with a 2-stage pipeline, 33 single-word/single-cycle instructions, and a hardware stack. It features a watchdog timer, power-on reset, brown-out detection (variant-dependent), and a low-power SLEEP mode. The 12-bit instruction word and 8-bit data path produce compact code density while sustaining deterministic interrupt latency for real-time control.
Typical applications include appliance control, simple sensor interfaces, LED driving logic, low-cost consumer electronics, hobbyist projects, and industrial logic replacement where small, deterministic, OTP-programmed MCUs are appropriate. The SOIC-18 package also supports high-volume SMT production lines.
When designing with this device, note that OTP memory cannot be re-programmed in-circuit - select a Flash-based PIC16F equivalent (e.g., PIC16F54) for development cycles that require firmware revision. Decoupling VDD/VSS with a 100 nF ceramic capacitor adjacent to the IC is essential; place MCLR pull-ups and oscillator components to minimize noise-induced resets.
This page consolidates distributor pricing across LCSC, Mouser and Hotenda, real-time cross-reference alternatives from Microchip's same-family PIC16C5X lineup, and practical design considerations beyond what is summarized in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16C56A-20E/SO — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16C56A-20E/SO (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Timers, Mounting Type, Program Memory Size.
PIC16C56A-20/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C56A-20E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C56AT-20E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C56A-04E/SO
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C56A-04E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F54-I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C56A-20E/SO Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit Microcontroller (MCU) |
| Series | PIC 16C |
| Core Architecture | PIC RISC (Harvard, 12-bit instruction word) |
| Program Memory Size | 1.5 KB (1K x 12) OTP EPROM |
| RAM Size | 25 bytes |
| Tần số xung maksimum | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Điện áp cung cấp hoạt động | 3.0 V to 5.5 V |
| Number of I/O Pins | 12 |
| Number of Timers | 2 x 8-bit |
| Bề rộng đường dữ liệu | 8 bit |
| Hộp | 18-SOIC (7.50 mm width, 0.295") |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +125C (Extended 'E' grade) |
| Trạng thái RoHS | Compliant |
| Peripherals | Watchdog Timer, Power-On Reset, SLEEP mode |
Cấu hình chân PIC16C56A-20E/SO
| Chân 1 | RA0 — Bidirectional I/O port A bit 0 |
| Chân 2 | RA1 — Bidirectional I/O port A bit 1 |
| Chân 3 | RA2 — Bidirectional I/O port A bit 2 |
| Chân 4 | RA3 — Bidirectional I/O port A bit 3 |
| Chân 5 | RA4/RTCC — I/O port A bit 4 / RTCC timer input (open-drain) |
| Chân 6 | RB0/INT — I/O port B bit 0 / external interrupt |
| Chân 7 | RB1 — Bidirectional I/O port B bit 1 |
| Chân 8 | RB2 — Bidirectional I/O port B bit 2 |
| Chân 9 | RB3 — Bidirectional I/O port B bit 3 |
| Chân 10 | RB4 — Bidirectional I/O port B bit 4 |
| Chân 11 | RB5 — Bidirectional I/O port B bit 5 |
| Chân 12 | RB6 — Bidirectional I/O port B bit 6 |
| Chân 13 | RB7 — Bidirectional I/O port B bit 7 |
| Chân 14 | VSS — Ground reference |
| Chân 15 | VDD — Positive supply voltage (3.0-5.5 V) |
| Chân 16 | OSC2 — Oscillator output (crystal/RC) |
| Chân 17 | OSC1 — Oscillator input (crystal/RC/external clock) |
| Chân 18 | MCLR — Master clear (reset, active low) |
Ứng dụng tiêu biểu
PIC16C56A-20E/SO phù hợp cho 6 Áp dụngs: Appliance Control Logic, LED Display and Lighting Drivers, Low-Cost Consumer Electronics, Industrial Sensor Interface, Automotive Interior Modules, Hobby and Educational Projects.
Appliance Control Logic
The PIC16C56A-20E/SO fits appliance control logic (washing machines, microwave ovens, dishwashers) thanks to its extended -40C to +125C temperature range, 12 GPIO for relays and buttons, and OTP EPROM that locks firmware permanently after validation. The 20 MHz clock and 200 ns instruction cycle handle timing-sensitive control loops such as PWM motor drive, debounced keypad polling, and sensor sampling. Designers benefit from Microchip's mature PIC16C5X toolchain and the SOIC-18 package's suitability for high-volume reflow assembly. Total system cost stays low because the integrated watchdog timer, two 8-bit timers, and POR eliminate external supervisor ICs.
Được đề xuất
LED Display and Lighting Drivers
The PIC16C56A-20E/SO drives LED displays and decorative lighting fixtures by bit-banging multiplexed outputs across its 12 GPIO. The 200 ns instruction cycle at 20 MHz allows refresh rates well above the human flicker-fusion threshold (typically 60-100 Hz even for 8-digit 7-segment displays). The 3.0-5.5 V supply matches standard LED driver rails, while the extended temperature range supports outdoor fixtures. Because the firmware is locked into OTP, factory-programmed lighting animations cannot be pirated or field-modified - a security advantage for commercial lighting products.
Được đề xuất
Low-Cost Consumer Electronics
The PIC16C56A-20E/SO suits low-cost consumer electronics such as remote controls, simple toys, kitchen timers, and novelty gadgets where per-unit cost and deterministic behavior dominate design priorities. The 1.5 KB OTP is sufficient for compact state-machine firmware, while the 25 bytes RAM accommodates small look-up tables and stack depth for nested interrupts. Consumer products benefit from the SOIC-18 SMT package for automated assembly and from Microchip's stable long-term silicon supply.
Được đề xuất
Industrial Sensor Interface
The PIC16C56A-20E/SO interfaces industrial sensors (limit switches, Hall sensors, simple thermistor bridges) by polling digital inputs and producing relay or transistor-driver outputs. The 12 GPIO handle 4-8 sensor inputs plus output channels, and the two 8-bit timers enable debounce, time-of-flight, and PWM output for proportional control. The -40C to +125C extended temperature meets IEC industrial environmental requirements. The OTP memory ensures the firmware cannot be field-modified - critical for safety-certified industrial installations.
Được đề xuất
Automotive Interior Modules
The PIC16C56A-20E/SO can be used in non-safety automotive interior modules such as ambient lighting controllers, HVAC mode switches, seat-position memory buttons, and accessory multiplexers. The extended -40C to +125C temperature range covers cabin environments, and the 12 GPIO accommodate multiple switch inputs and PWM LED outputs. Note that safety-critical automotive systems require AEC-Q100 qualification - for those use cases, select PIC16F57 or PIC16F722 with proper automotive-grade screening rather than this industrial-grade part.
Được đề xuất
Hobby and Educational Projects
The PIC16C56A-20E/SO works well for hobbyist and educational projects that need an inexpensive, deterministic 8-bit MCU for learning embedded C, assembly, or basic robotics. The 20 MHz clock allows visible LED blinking rates and motor PWM, while the 12 GPIO suffice for line-follower robots, simple alarm systems, and traffic-light simulators. Educators value the locked OTP firmware - students cannot overwrite a working program, but they can swap chips easily. The SOIC-18 footprint fits standard 18-pin breakout boards and breadboard adapters.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C56A-20E/SO — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16C56A-20/SO | PIC16C56A-20E/P | PIC16C56AT-20E/SO | PIC16C56A-04E/P | PIC16F54-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC (7.50 mm) | 18-SOIC - same | 18-PDIP - through-hole | 18-SOIC - same | 18-PDIP - through-hole | 18-SOIC - same |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz (-80%) | 20 MHz |
| Program Memory | 1.5 KB OTP EPROM | 1.5 KB OTP EPROM | 1.5 KB OTP EPROM | 1.5 KB OTP EPROM | 1.5 KB OTP EPROM | 1 KB Flash (re-programmable) |
| RAM Size | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes |
| Operating Temperature | -40C to +125C (Extended) | 0C to +70C (Commercial) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +85C (Industrial) |
| Memory Type | OTP EPROM (one-time programmable) | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash (re-programmable) |
| Approx. Unit Price (qty 100, USD) | 1.30 | 1.10-1.20 | 1.40-1.55 | 1.30-1.40 | 1.20-1.30 | 1.10-1.30 |
Bảo phân biệt quan trọng
- Extended industrial temperature range (-40C to +125C) (vsPIC16C56A-20/SO)
- Modern Flash reprogrammability with same footprint (vsPIC16F54-I/SO)
- Lower-cost OTP for fixed-firmware high-volume builds (vsPIC16C56A-04E/P)
Ghi chú thiết kế
Place a 100 nF ceramic decoupling capacitor as close as possible between VDD (pin 15) and VSS (pin 14) to suppress high-frequency switching noise from the internal oscillator. For multi-rail boards, add a 10 uF bulk tantalum or aluminum capacitor within 25 mm of the supply pin. The PIC16C56A-20E/SO draws approximately 2-5 mA active current at 20 MHz and <1 uA in SLEEP mode; if battery life is critical, gate the supply with a low-leakage load switch.
The 18-SOIC package (0.295" body width, 1.27 mm pitch) is compatible with standard SOIC-18 land patterns. Keep oscillator traces short (<20 mm) and route them away from switching signals to avoid injection of noise into the clock input. The MCLR pin (pin 18) requires a 10-50 kohm pull-up to VDD for reliable operation; do not leave it floating. For high-noise environments, add a 100 nF cap from MCLR to VSS to filter out reset glitches.
The OTP EPROM cannot be re-programmed in-circuit - any firmware bug or update requires a new chip. For development, use a Flash-based PIC16F54 or PIC16F57 in the same 18-SOIC footprint, then migrate to PIC16C56A-20E/SO for production. Do not exceed the maximum clock frequency of 20 MHz; the '04' grade variant operates up to 4 MHz and must not be clocked higher. Note that the RA4/RTCC pin has an open-drain output structure - external pull-up resistor required for high-level driving.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. The SOIC-18 package is lead-free and halogen-free. Not AEC-Q100 qualified - the part is rated for industrial/commercial use but not automotive safety-critical applications.
