PIC16C54C-20I/SS - 8-bit 20MHz OTP MCU, 12 I/O, SSOP-20
MPN: PIC16C54C-20I/SS ✓ Hoạt độngPIC16C54C-20I/SS Tóm tắt
What is a PIC16C5x microcontroller? An 8-bit microcontroller is a small computer-on-a-chip integrating a CPU, RAM, program memory, and peripherals on a single die. The PIC16C5x family uses a Harvard RISC architecture with separate program and data buses, a 12-bit wide instruction word, and a small fixed instruction set of 33 single-word, single-cycle instructions, enabling deterministic execution and very low power consumption. This hierarchy places the PIC16C54C in the broader taxonomy of microcontroller -> embedded controller -> semiconductor, and the 'C' OTP variant is the most modern, lowest-cost member of the original PIC16C5x line.
Key features include a two-level deep hardware call stack, direct/indirect/relative addressing modes, an 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler, power-on reset (POR), a Watchdog Timer (WDT) with its own on-chip RC oscillator, and an internal/external oscillator option. The device operates from 4.5V to 5.5V and supports both internal RC and external crystal/RC oscillator configurations, with selectable oscillator types.
Architecturally, the PIC16C54C uses a fully static CMOS design and the PIC mid-range core (12-bit instructions, 8-bit data path). Seven or eight special-function hardware registers control I/O and core operation. Because of its small footprint, low pin count, and deterministic core, it excels in cost-sensitive 8-bit embedded applications that do not need interrupts or a deep stack.
Typical applications include simple appliance controls, battery chargers, LED lighting controllers, sensor signal conditioning, automotive body electronics, and low-cost consumer devices. The SSOP-20 package (0.209 inch / 5.30 mm body width) supports compact PCB designs. Note that the PIC16C54C does not feature interrupts, so polling-based firmware is required.
Design consideration: this part is OTP (One-Time Programmable), so code must be fully verified before committing - there is no in-circuit reprogramming. For prototyping or field-upgradable designs, consider the PIC16F54 Flash-based equivalent in the same SSOP-20 footprint.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a bare manufacturer product page.
Bộ thay thế dễ dàng lắp đặt cho PIC16C54C-20I/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 PIC16C54C-20I/SS (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Size, Timers, Program Memory Type, Operating Temperature.
PIC16F54-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54A-20I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54C-04I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54C-20I/SS Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC RISC |
| Core Size | 8-bit data path, 12-bit instructions |
| Tần số xung maksimum | 20 MHz |
| Program Memory Size | 768 B (512 x 12) OTP |
| RAM Size | 25 B |
| Number of I/O Pins | 12 |
| Điện áp cung cấp | 4.5 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 20-SSOP (0.209 inch, 5.30 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Oscillator Type | External or Internal RC |
| Timers | 1 x 8-bit (TMR0) with 8-bit prescaler |
| Peripherals | POR, WDT |
| Connectivity | None (standalone) |
| Data Converters | None |
| Program Memory Type | OTP EPROM |
| Cấp MSL | 1 (unlimited) |
| Lead-Free / RoHS | Compliant per Microchip product page |
Cấu hình chân PIC16C54C-20I/SS
| Chân 1 | RA2 — Bidirectional I/O port A bit 2 |
| Chân 2 | RA3 — Bidirectional I/O port A bit 3 |
| Chân 3 | RTCC — Real-time clock/counter TMR0 input (also RA0) |
| Chân 4 | MCLR — Master clear reset (active low) |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0 — Bidirectional I/O port B bit 0 |
| 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 (secondary) |
| Chân 15 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| Chân 16 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| Chân 17 | RA0 — Bidirectional I/O port A bit 0 |
| Chân 18 | RA1 — Bidirectional I/O port A bit 1 |
| Chân 19 | VDD — Positive supply voltage (4.5V to 5.5V) |
| Chân 20 | VDD — Positive supply voltage (4.5V to 5.5V, secondary) |
Ứng dụng tiêu biểu
PIC16C54C-20I/SS phù hợp cho 6 Áp dụngs: Appliance Control Boards, LED Lighting Controllers, Battery Chargers, Sensor Signal Conditioning, Automotive Body Electronics, Consumer Electronics Toys.
Appliance Control Boards
The PIC16C54C-20I/SS suits low-cost appliance control (washing machines, microwave user interfaces, fans) where deterministic polled firmware, 12 digital I/O, and OTP cost optimization matter more than interrupts. At 20 MHz, the core executes one instruction per cycle, comfortably timing relay de-bounce, button scanning, and 7-segment multiplexing without DMA. The SSOP-20 footprint (5.30 mm body) supports tight main-control PCB layouts. Compared with PIC16F877A, the C54C drops ADC/EUSART but cuts unit cost ~30% for I/O-bound applications.
Được đề xuất
LED Lighting Controllers
LED driver and dimmer controllers benefit from the PIC16C54C-20I/SS's 12 I/O, hardware WDT, and industrial -40C to +85C temperature grade. The 20 MHz core generates accurate PWM via firmware toggles for triac-dimmable mains LED lamps. OTP memory locks the dimming curve, preventing field tampering and reverse engineering - a regulatory plus for safety-critical SSL products. SSOP-20 keeps the BOM compact inside lamp bases. Pair with a TRIAC driver and zero-cross detector for phase-angle dimming.
Được đề xuất
Battery Chargers
Simple lead-acid or NiMH chargers use the PIC16C54C-20I/SS for voltage/current loop control via the 8-bit TMR0 and firmware ADC by sigma-delta on a digital I/O pin. The 4.5V to 5.5V supply matches USB or wall-adapter rails, and the WDT guards against firmware lockup. OTP ensures the charge algorithm cannot be corrupted by voltage transients on the DC bus. Polled execution suffices because the charge cycle is intentionally slow (hours), so no interrupts are needed.
Được đề xuất
Sensor Signal Conditioning
Cost-sensitive sensor front-ends (thermistor bridges, simple PIR motion detectors, reed-switch debouncers) use the PIC16C54C-20I/SS as a low-cost digital filter. Polled firmware implements moving-average filtering of a comparator-based sigma-delta ADC on one I/O pin. The 20 MHz clock handles ~5 MIPS, enough for 10 Hz update rates on 4-8 sensors. Industrial temperature grade suits outdoor and HVAC installations, while OTP locks calibration coefficients.
Được đề xuất
Automotive Body Electronics
Inside-cabin automotive accessories (window timers, mirror controllers, simple alarm indicators) historically used the PIC16C54C-20I/SS because the -40C to +85C industrial grade survives the cabin environment and OTP locks the BOM. 12 I/O drive LEDs, relays, and switches directly. Note: for under-hood AEC-Q100 applications, upgrade to the PIC16F54-I/SS or PIC16F18313-I/SN (AEC-Q100 qualified) - the C54C lacks automotive qualification by design.
Được đề xuất
Consumer Electronics Toys
Mass-market toys, novelty items, and educational kits use the PIC16C54C-20I/SS because OTP delivers the lowest possible unit cost (<USD 1.75 at qty 1000) while the 20 MHz core animates LEDs, drives buzzers, and sequences servo motors. 25 B RAM accommodates small lookup tables for sound effects; 768 B OTP holds simple state-machine firmware. SSOP-20 supports tiny PCBs inside handheld enclosures. Polled firmware is acceptable because toy loops are inherently short.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C54C-20I/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 | PIC16F54-I/SS | PIC16C54A-20I/SS | PIC16C54C-04I/SS | PIC16C54C-20I/P | PIC16C54C-20I/SO |
|---|---|---|---|---|---|---|
| Package | 20-SSOP (0.209 inch / 5.30 mm) | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-PDIP - different footprint | 20-SOIC - different footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 20 MHz | 20 MHz |
| Program Memory | 768 B OTP | 768 B Flash | 768 B OTP | 768 B OTP | 768 B OTP | 768 B OTP |
| RAM Size | 25 B | 25 B | 25 B | 25 B | 25 B | 25 B |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Supply Voltage | 4.5 V to 5.5 V | 2.0 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Memory Type | OTP EPROM (one-time programmable) | Flash (reprogrammable) | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
| Interrupts | None (polled only) | None (polled only) | None (polled only) | None (polled only) | None (polled only) | None (polled only) |
Bảo phân biệt quan trọng
- OTP EPROM allows code-locked mass production at lowest unit cost (vsPIC16F54-I/SS)
- Industrial temperature grade for harsh environments (vsPIC16C54C-20/P (commercial grade, 0C to +70C))
- True drop-in upgrade to Flash memory via PIC16F54-I/SS (vsPIC16F54-I/SS)
Ghi chú thiết kế
Estimated: SSOP-20 thermal pad is the VSS pin (pin 5/14) - tie both VSS pins to a contiguous ground pour. Route MCLR (pin 4) with a 10 kohm pull-up to VDD and a 100 nF cap to VSS for noise-free reset. Place a 100 nF decoupling cap within 5 mm of VDD pins 19/20 and a 10 uF bulk cap on the same supply node. SSOP-20 land pattern requires 0.65 mm pitch traces.
Estimated: OTP memory can be programmed only once - the programmer (e.g., MPLAB PICkit 3/4) verifies each word after writing. Any verification failure means the silicon is dead. Always pre-test firmware on a PIC16F54-I/SS (Flash drop-in) and only commit to OTP for the production run. Also note the PIC16C5x core has NO hardware interrupts - a missed event in polled firmware becomes a permanent bug if not handled by the WDT reset path.
The PIC16C54C-20I/SS supports LP, XT, HS, and RC oscillator modes selected by configuration bits. For 20 MHz operation, HS mode with a 20 MHz crystal and two 15-33 pF load capacitors is mandatory - XT mode is limited to 4 MHz. For cost-sensitive designs below 4 MHz, the internal 4 MHz RC oscillator (configurable) eliminates the crystal entirely. Always include a 1 Mohm resistor across OSC1/OSC2 if using a low-drive crystal to prevent overdrive.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. The PIC16C54C family is NOT AEC-Q100 qualified; for automotive cabin/body electronics that need formal qualification, use PIC16F54-I/SS or a PIC16F1xx AEC-Q100 part instead.
