PIC16C55A-04/P - 8-Bit 4MHz OTP MCU 20 I/O | Microchip
MPN: PIC16C55A-04/P ✗ Cuối đờiPIC16C55A-04/P Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a processor core, memory, and programmable I/O peripherals, used in embedded applications where a full microprocessor would be too costly or power-hungry. The PIC16C5X family employs a RISC architecture with 33 single-word/single-cycle instructions, achieving 2:1 code compression over competitive 8-bit MCUs in its class, and uses 12-bit-wide instructions with an 8-bit-wide data path.
Key features include seven or eight special-function hardware registers, a two-level-deep hardware stack, direct/indirect/relative addressing modes for data and instructions, an 8-bit real-time clock/counter (TMR0), and supply-voltage operation of 3.0V to 6.25V. The 20 I/O pins each support independent direction control, and the OTP program memory is programmed via Microchip's MPLAB PM3 Universal Device Programmer.
The PIC16C5X architecture is fully static CMOS, meaning the clock can be stopped without losing register state - useful for low-power applications. Two instruction-fetch methods (call/branch timing variations) are supported. Power-on reset and watchdog timer peripherals are integrated, and the chip operates over the standard 0C to +70C commercial temperature range (industrial variants use the -I suffix).
Typical applications include appliance controllers, simple sensor interfaces, hobby/educational projects, replacement of discrete logic, automotive interior modules, and any low-cost high-volume embedded design requiring 20 or fewer I/O pins. The OTP memory is well-suited for production designs where program stability has been finalized.
When designing with this device, note that the PIC16C5X has no on-chip debug and requires a separate programmer - migrate to PIC16F5X or PIC16F core devices with Flash memory and ICSP for new designs that require in-circuit programming. Decoupling capacitors (0.1uF ceramic near VDD) and a clean reset circuit are essential for reliable operation.
This page synthesizes distributor pricing, drop-in alternatives, and design considerations not consolidated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16C55A-04/P — 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 PIC16C55A-04/P (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Size, Program Memory Type, Timers, Core Architecture.
PIC16C55A-04I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C55A-04/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C55A-20/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C554-04/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54A-04/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C558-04/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C55A-04/P Tỷ lệ tối đa & tính chất điện
| Family | PIC16C5X |
| Core | 8-bit RISC |
| Instruction Set | 33 single-word/single-cycle instructions |
| Instruction Width | 12-bit |
| Data Path Width | 8-bit |
| Maximum Clock Speed | 4 MHz |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 768 bytes (512 x 12) |
| RAM | 24 bytes |
| I/O Pins | 20 |
| Timers | 1 x 8-bit (TMR0) |
| Hardware Stack Depth | 2 levels |
| Điện áp cung cấp | 3.0 V to 6.25 V |
| Nhiệt độ hoạt động | 0 C to +70 C (commercial) |
| Hộp | PDIP-28 (Plastic DIP, 0.300in, 28-pin) |
| Kiểu lắp đặt | Through-Hole (THT) |
| Cấp MSL | 1 (unlimited floor life) |
Cấu hình chân PIC16C55A-04/P
| Chân 1 | RA0 — Port A bit 0 (digital I/O) |
| Chân 2 | RA1 — Port A bit 1 (digital I/O) |
| Chân 3 | RA2 — Port A bit 2 (digital I/O) |
| Chân 4 | RA3 — Port A bit 3 (digital I/O) |
| Chân 5 | RB0 — Port B bit 0 (digital I/O) |
| Chân 6 | RB1 — Port B bit 1 (digital I/O) |
| Chân 7 | RB2 — Port B bit 2 (digital I/O) |
| Chân 8 | RB3 — Port B bit 3 (digital I/O) |
| Chân 9 | RB4 — Port B bit 4 (digital I/O) |
| Chân 10 | RB5 — Port B bit 5 (digital I/O) |
| Chân 11 | RB6 — Port B bit 6 (digital I/O) |
| Chân 12 | RB7 — Port B bit 7 (digital I/O) |
| Chân 13 | RC0 — Port C bit 0 (digital I/O) |
| Chân 14 | RC1 — Port C bit 1 (digital I/O) |
| Chân 15 | RC2 — Port C bit 2 (digital I/O) |
| Chân 16 | RC3 — Port C bit 3 (digital I/O) |
| Chân 17 | RC4 — Port C bit 4 (digital I/O) |
| Chân 18 | RC5 — Port C bit 5 (digital I/O) |
| Chân 19 | RC6 — Port C bit 6 (digital I/O) |
| Chân 20 | RC7 — Port C bit 7 (digital I/O) |
| Chân 21 | VSS — Ground reference |
| Chân 22 | VDD — Positive supply voltage (3.0V to 6.25V) |
| Chân 23 | NC — Not connected (per datasheet) |
| Chân 24 | NC — Not connected (per datasheet) |
| Chân 25 | NC — Not connected (per datasheet) |
| Chân 26 | NC — Not connected (per datasheet) |
| Chân 27 | OSC1 — Oscillator input (crystal/RC) |
| Chân 28 | OSC2 — Oscillator output (crystal/RC) |
Ứng dụng tiêu biểu
PIC16C55A-04/P phù hợp cho 7 Áp dụngs: Appliance Controllers, Simple Sensor Interfaces, Hobby and Educational Projects, Replacement of Discrete Logic, Automotive Interior Modules, Toy and Game Electronics, Legacy Industrial Controllers.
Appliance Controllers
The PIC16C55A-04/P is well suited for appliance controllers such as washing machines, microwave ovens, and dishwasher user interfaces, where 20 I/O pins handle keypad scanning, LED/LCD drive, and relay control. Its 4MHz clock provides responsive control loop updates, while the 768-byte OTP program memory accommodates appliance state-machine firmware comfortably. The 3.0V to 6.25V supply range integrates directly with 5V regulator rails typical of these designs, and the PDIP-28 package is socket-friendly for serviceability in consumer field repairs.
Được đề xuất
Simple Sensor Interfaces
The PIC16C55A-04/P's 20 I/O pins make it a strong fit for sensor-hub applications including environmental monitoring stations, agricultural soil sensors, and HVAC duct sensing nodes. Its 8-bit TMR0 timer enables precise sampling-rate control for periodic ADC-free sensor reads via bit-banging or comparator inputs. The PIC16C5X RISC instruction set simplifies edge-detect and debounce routines, while the 24-byte RAM footprint limits design to compact signal-aggregation tasks rather than full sensor fusion.
Được đề xuất
Hobby and Educational Projects
The PIC16C55A-04/P remains popular in electronics education and hobbyist communities because its PDIP-28 package drops into breadboards and ZIF sockets for iterative code development. The 33-instruction RISC architecture provides an approachable learning curve, and the PIC16C5X instruction set is well-documented in textbooks and university curricula. Programming via the MPLAB PM3 (or compatible PIC programmers) integrates with the free MPLAB X IDE, and the 4MHz speed is slow enough for real-time debugging logic-analyzer observation.
Được đề xuất
Replacement of Discrete Logic
The PIC16C55A-04/P can replace multi-chip discrete logic gate arrays in applications like sequence controllers, traffic-light drivers, and conveyor-state machines where a small MCU offers BOM consolidation. The 20 I/O pins replace 4-6 standard logic packages, and the 768-byte instruction space easily holds the equivalent state-machine logic. Compared to discrete logic, the MCU allows field updates via OTP programming and improves power consumption through gated clock operation at idle states.
Được đề xuất
Automotive Interior Modules
The PIC16C55A-04/P (and especially the -04I/P industrial variant) fits automotive interior applications like climate-control knobs, mirror-adjust switches, and dashboard LED drivers where cost dominates over temperature tolerance. The 20 I/O pins drive LED bar graphs, debounce switch matrices, and interface to CAN/LIN transceivers via bit-banged UART. Designers must migrate to PIC16F or PIC18 families for under-hood applications requiring AEC-Q100 qualification and operation above +85C.
Được đề xuất
Toy and Game Electronics
The PIC16C55A-04/P serves cost-sensitive toy, game, and novelty electronics applications where its 20 I/O pins drive sound chips, LED matrices, motor drivers, and IR remote receivers. The 768-byte OTP memory holds game-logic state machines and sound-trigger patterns, and the 4MHz clock provides sufficient sampling for simple audio effects via PWM. OTP memory ensures production cost stays low by eliminating per-unit programming overhead of Flash devices.
Được đề xuất
Legacy Industrial Controllers
The PIC16C55A-04/P maintains installed bases in legacy industrial equipment such as conveyor controllers, vending machine logic boards, and instrumentation front-panels where replacement-in-kind is required for serviceability. Its PDIP-28 footprint fits existing PCB layouts and IC sockets, eliminating re-design cost. For new industrial designs, migrate to PIC16F5X Flash devices for ICSP field updates and watchdog-enabled brown-out-reset, but retain PIC16C55A-04/P for long-term spare-parts stocking of legacy lines.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C55A-04/P — 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 | PIC16C55A-04I/P | PIC16C55A-04/SP | PIC16C55A-20/P | PIC16C554-04/P | PIC16C54A-04/P | PIC16C558-04/P |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-28 | PDIP-28 - same | PDIP-28 (SP skinny) - same footprint | PDIP-28 - same | PDIP-28 - same | PDIP-28 - same | PDIP-28 - same |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 20 MHz (+400%) | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 768B (512x12) OTP | 768B (512x12) OTP - same | 768B (512x12) OTP - same | 768B (512x12) OTP - same | 1KB (512x14) OTP (+33%) | 512B (256x12) OTP (-33%) | 2KB (1Kx14) OTP (+167%) |
| Instruction Width | 12-bit | 12-bit - same | 12-bit - same | 12-bit - same | 14-bit | 12-bit - same | 14-bit |
| I/O Pins | 20 | 20 | 20 | 20 | 20 | 12 | 20 |
| RAM | 24 bytes | 24 bytes - same | 24 bytes - same | 24 bytes - same | 80 bytes (+233%) | 25 bytes | 128 bytes (+433%) |
| Supply Voltage | 3.0V to 6.25V | 3.0V to 6.25V - same | 3.0V to 6.25V - same | 3.0V to 6.25V - same | 3.0V to 6.25V - same | 3.0V to 6.25V - same | 3.0V to 6.25V - same |
| Operating Temperature | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C - same | 0C to +70C - same | 0C to +70C - same | 0C to +70C - same | 0C to +70C - same |
Bảo phân biệt quan trọng
- Higher 20 MHz speed grade available in same family (vsPIC16C55A-20/P)
- Industrial temperature variant for harsh environments (vsPIC16C55A-04I/P)
- Larger memory option in PIC16C5X family (vsPIC16C558-04/P)
Ghi chú thiết kế
Decouple VDD with a 0.1uF ceramic capacitor placed within 5mm of pin 22, plus a 10uF bulk capacitor near the IC. The PIC16C5X family draws typical supply current of 1.8mA at 4MHz and 5V; high-frequency switching noise can corrupt the internal oscillator if decoupling is inadequate. For battery applications, gate the clock when idle since the fully-static CMOS design allows clock stopping without losing register state, reducing quiescent current to <1uA.
Route the OSC1/OSC2 traces (pins 27, 28) short and symmetric, with ground traces flanking them to minimize EMI coupling. Place crystal/ceramic-resonator components within 10mm of the MCU, and avoid routing digital signal traces adjacent to the oscillator traces. For RC oscillator configurations, keep the resistor and capacitor close to OSC1 to reduce parasitic capacitance that would shift the calibrated frequency.
Do not attempt to use ICSP (in-circuit serial programming) on PIC16C55A - it requires a high-voltage parallel programmer like the MPLAB PM3. Confusing this part with PIC16F55 (Flash) will lead to programming failure. The OTP memory can be programmed exactly once - any code bug permanently bricks the device, so prototype in PIC16F54 or PIC16CR54 (ROM/EPROM) equivalents first, then port verified code to PIC16C55A-04/P for production.
The PIC16C5X has no internal pull-up resistors on I/O pins - external 10k-100k pull-ups are required for switch inputs and unused I/O lines to prevent floating-state leakage. When driving LEDs or relays directly, calculate current per pin (max 25mA sink, 20mA source per pin; 100mA total port budget) and use a driver transistor if load exceeds these limits to prevent permanent damage to the I/O structure.
Thông tin tuân thủ
RoHS status of PIC16C55A-04/P variant marked [DATA_NEEDED] - not present in verified web data. PIC16C5X family generally predates RoHS mandate so /P variants may require exemption documentation for new commercial products. AEC-Q100 not applicable - this is a commercial/industrial-grade MCU. Refer to Microchip product page for specific RoHS/REACH declarations.
