PIC16C55T-RCI/SS - 8-Bit 4MHz OTP MCU 768B | Microchip 28-SSOP
MPN: PIC16C55T-RCI/SS ✗ Cuối đờiPIC16C55T-RCI/SS Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, RAM, and I/O peripherals on one die. The PIC16C5X family belongs to the baseline PIC architecture using a 12-bit instruction word with a two-stage pipeline, classified under the hypernym chain: microcontroller -> embedded processor -> microprocessor -> semiconductor IC. OTP memory allows factory programming but cannot be re-written, balancing cost against in-field reprogrammability.
Key features include 20 I/O pins, an 8-bit timer/counter, watchdog timer, power-on reset, and RC oscillator support with external clock option. The device operates from 3V to 6.25V and consumes low current typical of CMOS designs. The PIC RISC architecture executes most instructions in a single cycle, providing deterministic throughput for real-time control loops. The 12-bit wide instruction word allows compact code density, and the Harvard bus keeps program and data paths separate for predictable timing.
Typical applications include industrial automation controllers, consumer appliance logic replacement, automotive sub-system controllers, sensor signal conditioning front-ends, and small embedded timing/sequencing tasks. The industrial temperature range permits deployment in uncontrolled environments, and the SSOP footprint suits dense PCB layouts where DIP-28 alternatives would consume too much board area.
When designing with this part, note that OTP memory requires pre-production programming; revisions cannot be field-deployed without physical replacement. The 4MHz top speed is adequate for slow control loops but limiting for any signal processing. Ensure decoupling caps of 0.1uF are placed near VDD and that unused I/O pins are configured as outputs to minimize current draw.
This page synthesizes distributor pricing, drop-in 28-SSOP alternatives, and practical design notes for the PIC16C55T-RCI/SS, giving engineers a faster sourcing decision than distributor catalog pages alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16C55T-RCI/SS — 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 PIC16C55T-RCI/SS (cùng hình factor và footprint) — khác nhau ở Oscillator Type, Program Memory Size, Instruction Set, Package, Program Memory Type.
PIC16C55T-RCE/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C55-RCI/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C55-HSI/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C55T-HS/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C55T-HSI/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C55T-HSE/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C55T-RCI/SS Tỷ lệ tối đa & tính chất điện
| Core Processor | PIC |
| Core Size | 8-Bit |
| CPU Speed | 4 MHz |
| Program Memory Size | 768 B (512 x 12) |
| Program Memory Type | OTP (One-Time Programmable) |
| RAM Size | 24 B |
| Number of I/O | 20 |
| Supply Voltage Range | 3 V to 6.25 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C |
| Hộp / Vỏ | 28-SSOP (5.30 mm width) |
| Kiểu lắp đặt | Surface Mount |
| Oscillator Type | External (RC supported) |
| Peripherals | Watchdog Timer (WDT), Power-On Reset (POR) |
| Connectivity | - |
| Number of Timers | 1 x 8-bit |
| Instruction Set Architecture | PIC 12-bit baseline, RISC, 2-stage pipeline |
Cấu hình chân PIC16C55T-RCI/SS
| Chân 1 | RA2 — Port A bit 2 (digital I/O) |
| Chân 2 | RA3 — Port A bit 3 (digital I/O) |
| Chân 3 | RTCC — Timer/counter input or port A bit 4 |
| Chân 4 | MCLR — Master clear reset input (active low) |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0 — Port B bit 0 (digital I/O) |
| Chân 7 | RB1 — Port B bit 1 (digital I/O) |
| Chân 8 | RB2 — Port B bit 2 (digital I/O) |
| Chân 9 | RB3 — Port B bit 3 (digital I/O) |
| Chân 10 | RB4 — Port B bit 4 (digital I/O) |
| Chân 11 | RB5 — Port B bit 5 (digital I/O) |
| Chân 12 | RB6 — Port B bit 6 (digital I/O) |
| Chân 13 | RB7 — Port B bit 7 (digital I/O) |
| Chân 14 | RC0 — Port C bit 0 (digital I/O) |
| Chân 15 | RC1 — Port C bit 1 (digital I/O) |
| Chân 16 | RC2 — Port C bit 2 (digital I/O) |
| Chân 17 | RC3 — Port C bit 3 (digital I/O) |
| Chân 18 | RC4 — Port C bit 4 (digital I/O) |
| Chân 19 | RC5 — Port C bit 5 (digital I/O) |
| Chân 20 | VDD — Positive supply voltage (3V to 6.25V) |
| Chân 21 | RC6 — Port C bit 6 (digital I/O) |
| Chân 22 | RC7 — Port C bit 7 (digital I/O) |
| Chân 23 | OSC1 — Oscillator input (RC or crystal) |
| Chân 24 | OSC2 — Oscillator output (RC or crystal) |
| Chân 25 | RA0 — Port A bit 0 (digital I/O) |
| Chân 26 | RA1 — Port A bit 1 (digital I/O) |
| Chân 27 | NC — Not connected (per datasheet) |
| Chân 28 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16C55T-RCI/SS phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, Consumer Appliance Logic Replacement, Automotive Sub-System Controllers, Sensor Signal Conditioning Front-Ends, Small Embedded Timing and Sequencing Tasks, Legacy Board Repair and Sustainment.
Industrial Automation Controllers
The PIC16C55T-RCI/SS fits industrial automation control modules where its 4MHz PIC core drives deterministic timing loops for relay sequencing, sensor multiplexing, and simple state machines. Twenty I/O pins handle digital inputs from limit switches and outputs to solenoids or indicator LEDs without external muxing. The industrial -40C to +85C temperature range tolerates factory-floor thermal swings, and the 28-SSOP outline permits dense PCB layouts inside sealed control enclosures. The 768B OTP program memory suits fixed-function logic replacement where firmware is finalized at production. Compared to discrete logic ICs, the integrated core reduces BOM count and PCB area.
Được đề xuất
Consumer Appliance Logic Replacement
The PIC16C55T-RCI/SS replaces legacy CMOS logic gates in small consumer appliances such as coffee makers, washing machine sub-controllers, and microwave oven keypads. Its 20 I/O lines drive seven-segment displays, scan key matrices, and switch triac-triggered loads. The 4MHz instruction rate executes keypad scan routines and timing functions with single-cycle latency thanks to the PIC RISC architecture. Operating from a single 5V rail simplifies the analog supply chain. The 28-SSOP package lowers assembly cost versus DIP variants while still allowing hand-solder rework during prototype bring-up.
Được đề xuất
Automotive Sub-System Controllers
The PIC16C55T-RCI/SS is suited to non-safety automotive sub-systems such as interior lighting controllers, seat memory modules, and HVAC damper drivers. The industrial -40C to +85C temperature range handles cabin and under-hood-near applications, and the CMOS core draws minimal quiescent current, supporting battery-drained vehicle storage scenarios. The 768B OTP holds fixed lighting patterns and timing sequences; the 8-bit timer generates PWM-like outputs for dimming and motor slew-rate control. PIC16C5X devices have a long automotive heritage and Microchip's lifecycle tools ease PPAP documentation for Tier 1 suppliers.
Được đề xuất
Sensor Signal Conditioning Front-Ends
The PIC16C55T-RCI/SS serves as a low-cost digital front-end for sensor signal conditioning boards, digitizing thermistor, photodiode, or Hall-effect sensor inputs. Its 20 I/O lines can drive analog muxes, read comparator outputs, and pulse-width-modulate excitation sources for ratiometric measurement. The watchdog timer and power-on reset prevent sensor lock-ups in remote deployments. Although it lacks an integrated ADC, its 4MHz core can bit-bang simple sigma-delta conversion using external RC networks. The 28-SSOP package is well suited to small sensor PCBs where board area is constrained.
Được đề xuất
Small Embedded Timing and Sequencing Tasks
The PIC16C55T-RCI/SS excels at replacing 555-timer cascades and small PAL/GAL sequencers in timing-critical applications. Its hardware 8-bit timer plus software loops can synthesize arbitrary delays, pulse trains, and watchdog-style sequencing. The deterministic PIC two-stage pipeline gives instruction-cycle-accurate timing without jitter from interrupt latency or cache misses. Operating voltage from 3V to 6.25V permits direct battery or 5V-rail deployment. The 28-SSOP industrial-temperature package makes the part attractive for outdoor lighting controllers, irrigation valves, and HVAC damper timing.
Được đề xuất
Legacy Board Repair and Sustainment
The PIC16C55T-RCI/SS remains in demand for sustaining field-deployed equipment built in the 1990s and 2000s when this part was in mainstream production. Avionics sub-assemblies, industrial PLC I/O cards, and medical instrument controllers often use PIC16C5X OTP devices, and component-level repair is preferred over full board redesign. Distributors still carry limited allocation stock. Engineers performing repairs should verify date code and lot traceability to avoid counterfeit parts; sourcing through authorized channels such as DigiKey or Microchip Direct is recommended.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C55T-RCI/SS — 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 | PIC16C55T-RCE/SS | PIC16C55-RCI/SS | PIC16C55-HSI/SS | PIC16C55T-HS/SS | PIC16C55T-HSI/SS | PIC16C55T-HSE/SS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Core / Speed | 8-bit PIC, 4 MHz | 8-bit PIC, 4 MHz | 8-bit PIC, 4 MHz | 8-bit PIC, 4 MHz | 8-bit PIC, 4 MHz | 8-bit PIC, 4 MHz | 8-bit PIC, 4 MHz |
| Program Memory | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) |
| RAM | 24 B | 24 B | 24 B | 24 B | 24 B | 24 B | 24 B |
| I/O Pins | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Supply Voltage | 3 V to 6.25 V | 3 V to 6.25 V | 3 V to 6.25 V | 3 V to 6.25 V | 3 V to 6.25 V | 3 V to 6.25 V | 3 V to 6.25 V |
| Oscillator Type | RC | RC | RC | Crystal/HS | Crystal/HS | Crystal/HS | Crystal/HS |
| Temperature Grade | Industrial (-40C to +85C) | Extended (0C to +70C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) | Extended (0C to +70C) |
Bảo phân biệt quan trọng
- Pin-to-pin drop-in alternatives within the same PIC16C5X family (vsPIC16F648A-I/SS)
- Industrial temperature grade option in the same package (vsPIC16C55T-RCE/SS)
- RC oscillator variant for low-cost timing without external crystal (vsPIC16C55T-HS/SS)
Ghi chú thiết kế
Place a 0.1uF decoupling capacitor within 1cm of the VDD pin (pin 20) and a bulk 10uF tantalum or ceramic capacitor at the board entry point. The PIC16C55T-RCI/SS draws brief current spikes during internal clock-edge transitions that can corrupt program execution if VDD droops below 3V. An RC filter (10 ohm + 10uF) on VDD helps reject supply rail noise injected by relay coils or motor drivers sharing the same 5V rail.
Do not assume OTP programming is reversible; once a PIC16C55T-RCI/SS is written, it cannot be erased or re-programmed. Always validate firmware on a flash equivalent (PIC16F505) or windowed UV-erase PIC16C55 before committing to OTP programming. The configuration word (oscillator selection, watchdog enable, code protect) is part of the OTP image and cannot be changed post-programming. Verify the configuration word matches your application requirements before final programming.
The 28-SSOP package has a 0.65mm pin pitch and 5.30mm body width per JEDEC MS-150. Reserve at least 4mm of board edge clearance around the part for pick-and-place nozzles and inspection access. Route MCLR (pin 4) directly to a reset supervisor or RC network - long traces pick up ESD and can trigger spurious resets. Keep OSC1/OSC2 traces short and surrounded by ground pour to minimize radiated clock harmonics.
Thông tin tuân thủ
Compliance status not confirmed in verified web data; PIC16C5X OTP family predates many modern compliance programs. For new designs requiring RoHS compliance, migrate to PIC16F5X flash equivalents.
