PIC16C54T-RC/SS - 4MHz 8-Bit OTP MCU 768B | Microchip
MPN: PIC16C54T-RC/SS ✗ Cuối đờiPIC16C54T-RC/SS Tóm tắt
What is a PIC16C5x microcontroller? The PIC16C5x is Microchip's original low-cost, high-performance 8-bit RISC family, widely regarded as the ancestor of all modern PIC MCUs. It uses a Harvard architecture with separate program and data buses, a 12-bit-wide instruction word, and a fixed 33-instruction set. In the broader taxonomy, the PIC16C5x sits under: microcontroller -> embedded microcontroller -> 8-bit MCU -> RISC MCU -> EPROM/ROM-based MCU -> power management and control IC family.
Key features include 33 single-word/single-cycle RISC instructions, 2:1 code compression versus competing 8-bit MCUs through 12-bit-wide instructions, Power-On Reset (POR), Watchdog Timer (WDT) with on-chip RC oscillator, and programmable code protection. The 12-bit instruction width yields compact code density uncommon in 8-bit parts, while the two-level deep hardware stack and 2 K x 12 program-memory address space support compact firmware designs.
The PIC16C5x uses a RISC pipeline with single-cycle execution (except branches, which take two cycles), and integrates a precision 4 MHz internal RC-style oscillator reference. With a 4 MHz clock and 4 Tcy per instruction cycle, each instruction executes in 1 microsecond, delivering roughly 1 MIPS of throughput. The device's CMOS design provides low power consumption suitable for both battery and line-powered applications.
Typical applications include appliance control, automotive body electronics, low-power remote sensors, security and access systems, and general-purpose embedded logic replacement. The wide 3.0 V to 5.5 V supply range and small SSOP-20 footprint make it well-suited for cost-sensitive, space-constrained designs.
When designing with the PIC16C5x, ensure the OTP-programmed firmware is finalized before volume production - the "C" ROM family is one-time-programmable, so any firmware change requires a new part. Use the WDT for unattended recovery from software or hardware faults, and add 0.1 uF ceramic bypass capacitors near VDD/SS for stable operation.
This page synthesizes distributor pricing, drop-in alternatives from the PIC16C5x family and competitive 8-bit MCUs, application examples, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16C54T-RC/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 PIC16C54T-RC/SS (cùng hình factor và footprint) — khác nhau ở Program Memory Type, Package, Program Memory Size, Operating Temperature, Timers.
PIC16C54-RC/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54T-RC/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54C-04/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54C-04I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54-RCE/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F54-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54T-RC/SS Tỷ lệ tối đa & tính chất điện
| Core | PIC 8-bit RISC |
| Series | PIC16C5x (PIC16C54) |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 768 B (512 x 12) |
| RAM Size | 25 x 8 bytes |
| Maximum CPU Frequency | 4 MHz |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Number of I/O Pins | 12 |
| Bề rộng đường dữ liệu | 8 bit |
| Instruction Set Width | 12 bit |
| Number of Instructions | 33 single-word/single-cycle |
| Peripherals | POR, WDT (Watchdog Timer) |
| Hộp | 20-pin SSOP (5.30 mm body width) |
| Kiểu lắp đặt | Surface Mount (Tape and Reel) |
| Nhiệt độ hoạt động | 0C to +70C (commercial) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16C54T-RC/SS
| Chân 1 | RA2 — Bidirectional I/O port A bit 2 |
| Chân 2 | RA3 — Bidirectional I/O port A bit 3 |
| Chân 3 | RB0 — Bidirectional I/O port B bit 0 |
| Chân 4 | RB1 — Bidirectional I/O port B bit 1 |
| Chân 5 | RB2 — Bidirectional I/O port B bit 2 |
| Chân 6 | RB3 — Bidirectional I/O port B bit 3 |
| Chân 7 | RB4 — Bidirectional I/O port B bit 4 |
| Chân 8 | RB5 — Bidirectional I/O port B bit 5 |
| Chân 9 | RB6 — Bidirectional I/O port B bit 6 |
| Chân 10 | RB7 — Bidirectional I/O port B bit 7 |
| Chân 11 | VDD — Positive supply voltage |
| Chân 12 | GND — Ground reference |
| Chân 13 | OSC1 — Oscillator input / external clock input |
| Chân 14 | OSC2 — Oscillator output (crystal mode) |
| Chân 15 | T0CKI — Timer0 clock input / RA0 |
| Chân 16 | INT — External interrupt / RA1 |
| Chân 17 | MCLR — Master clear (reset) input, active low |
| Chân 18 | NC — Not connected (per datasheet) |
| Chân 19 | NC — Not connected (per datasheet) |
| Chân 20 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16C54T-RC/SS phù hợp cho 6 Áp dụngs: Appliance Control (Washers, Microwaves), Automotive Body Electronics, Low-Power Remote Sensor Nodes, Security and Access Control Panels, Replacement of Discrete Logic / Glue Logic, Toys, Hobby Electronics, and Educational Kits.
Appliance Control (Washers, Microwaves)
The PIC16C54T-RC/SS fits white-goods appliance control because its 4 MHz PIC core delivers deterministic 1 MIPS throughput, the 12 GPIO pins directly drive relays and triacs via opto-isolators, and the 768 B OTP holds timing sequences for wash cycles or microwave power levels. With POR and WDT integrated, no external supervisor IC is required, reducing BOM cost. The wide 3.0 V to 5.5 V supply tolerates unregulated 5 V rails common in motor-driven appliances. Designers typically pair the part with an 8-bit Darlington array (e.g., ULN2803) to switch solenoids and indicator LEDs directly from the GPIO pins, each capable of 25 mA source/sink.
Được đề xuất
Automotive Body Electronics
The PIC16C54T-RC/SS serves automotive body-control applications such as interior lighting, window lifters, and seat-position memory, where its small SSOP-20 footprint fits behind dashboard connectors and the 12-bit instruction word compresses state-machine firmware into 768 B OTP. The 4 MHz clock and 25 mA GPIO drive capability directly switch small automotive loads. For under-hood applications, the industrial-temperature variant PIC16C54C-04I/SS is preferred for its -40C to +85C range, while commercial-temp units like the PIC16C54T-RC/SS are typically used in cabin-mounted modules. Always derate supply voltage against load-dump transients with a TVS clamp.
Được đề xuất
Low-Power Remote Sensor Nodes
The PIC16C54T-RC/SS is suited to low-power remote sensor endpoints (soil moisture, environmental monitors, building automation) thanks to its fully-static CMOS core, which allows the 4 MHz clock to be gated for sub-microamp standby current. The 12 GPIO pins read multiple sensor channels and drive a low-power radio or LoRa transmitter, while the WDT wakes the part periodically to take readings and transmit. With 768 B OTP holding the sensor-fusion algorithm and 25 B RAM for sample buffers, the part is a cost-effective node controller for IoT-style deployments where flash reprogrammability is not required.
Được đề xuất
Security and Access Control Panels
The PIC16C54T-RC/SS is well-suited to legacy alarm panels, keypad controllers, and access-control readers where its 12-bit PIC instruction set holds keyscan debounce routines, EEPROM emulation, and simple encryption in 768 B of OTP. The 12 GPIO directly scan a 4x4 matrix keypad (8 lines) and drive status LEDs, while a serial interface (bit-banged UART) talks to a central panel. The OTP memory also provides natural security: once programmed, the firmware cannot be read back without erasing, deterring casual reverse engineering.
Được đề xuất
Replacement of Discrete Logic / Glue Logic
The PIC16C54T-RC/SS is often used as a one-chip replacement for 74-series glue-logic clusters in cost-sensitive designs. A single PIC16C5x can replace 3-5 discrete logic ICs by sequencing outputs based on input patterns stored in OTP code, freeing PCB area and reducing BOM count. The 1 MIPS throughput handles debouncing, sequencing, and simple state machines with cycle-accurate timing. Designers port existing HC/AC-logic designs by writing state diagrams in PIC assembly, then program the OTP once and never change the firmware.
Được đề xuất
Toys, Hobby Electronics, and Educational Kits
The PIC16C54T-RC/SS is a popular choice for educational kits and hobby electronics because of its low unit cost, simple 33-instruction RISC architecture, and wide availability through hobbyist distributors. Students learn embedded programming on the same PIC core that launched the modern microcontroller era, while the 4 MHz clock and 1 MIPS throughput are sufficient to drive LED chasers, servo controllers, and simple robotic platforms. The 20-pin SSOP package is breadboard-friendly with breakout boards, and the OTP memory forces disciplined firmware development.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C54T-RC/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 | PIC16C54-RC/SS | PIC16C54T-RC/SO | PIC16C54C-04/SS | PIC16C54C-04I/SS | PIC16F54-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP (5.30 mm) | 20-SSOP - same | 20-SOIC (7.50 mm) - different footprint | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Maximum CPU Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Program Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash (reprogrammable) |
| Program Memory Size | 768 B (512 x 12) | 768 B | 768 B | 768 B | 768 B | 768 B |
| RAM Size | 25 B | 25 B | 25 B | 25 B | 25 B | 25 B |
| Number of I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Supply Voltage Range | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 2.0 V to 5.5 V (wider) |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C | 0C to +70C | 0C to +70C | -40C to +85C (industrial) | -40C to +85C (industrial) |
Bảo phân biệt quan trọng
- Tape-and-reel packaging for high-volume SMT assembly (vsPIC16C54-RC/SS)
- SSOP-20 small-footprint option vs SOIC-20 (vsPIC16C54T-RC/SO)
- Modern flash migration path available in same footprint (vsPIC16F54-I/SS)
Ghi chú thiết kế
Decouple VDD to ground with a 0.1 uF ceramic capacitor placed within 5 mm of the VDD pin. For systems with noisy switching loads (relays, triacs) on the same supply, add a 10 uF tantalum or aluminum electrolytic bulk capacitor. The PIC16C54T-RC/SS supply range is 3.0 V to 5.5 V; operation outside this range is undefined and may damage the OTP memory cell.
The PIC16C54T-RC/SS uses One-Time-Programmable (OTP) EPROM, which means firmware cannot be modified after programming. Verify your firmware thoroughly before committing to volume programming - any code change requires a new device batch. Always keep the MCLR pin pulled high through a 10 kohm resistor and tied to VDD; floating MCLR can cause spurious resets in noisy environments.
The 20-pin SSOP package has a 0.65 mm pin pitch and 5.30 mm body width - small enough that hand-soldering requires care. Use a reflow profile with peak temperature of 250C for no more than 30 seconds. Add a ground pour under the device to improve thermal dissipation; even though the PIC16C5x is low-power, OTP programming draws extra current that benefits from a thermal copper plane.
Keep the oscillator traces (OSC1/OSC2) short and away from high-current switching traces. For crystal mode, place load capacitors (typically 15-33 pF) close to the pins. For RC oscillator mode (the "RC" in this part number), the oscillator frequency depends on the external resistor and capacitor; consult the PIC16C5x datasheet section on OSC options for component selection curves.
Thông tin tuân thủ
RoHS compliant per Microchip product declaration. Not AEC-Q100 qualified; for automotive applications use the PIC16C54C-04I/SS industrial-temp variant and apply additional qualification. Lead-free reflow-compatible (peak 250C).