PIC16C54T-XTI/SO - 8-bit 4MHz OTP MCU, 512B EPROM | Microchip
MPN: PIC16C54T-XTI/SO ✗ Cuối đờiPIC16C54T-XTI/SO Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral I/O on one piece of silicon. The PIC16C5x family is one of the original Microchip baseline architectures, implementing a Harvard RISC core with 12-bit-wide instructions that yield approximately 2:1 code compression over competitive 8-bit CISC devices of its class. PIC16C54 sits at the entry of the PIC taxonomy: PIC16C54 -> PIC16C5x family -> PIC baseline -> 8-bit PIC -> Microcontroller -> Semiconductor. Its simple, deterministic instruction set enables compact code development and predictable real-time interrupt response.
Key features include a 4 MHz oscillator input (XT grade), 33 single-word instructions, a 12-bit instruction word, two 8-bit I/O ports (Port A and Port B, total 12 I/O pins), an 8-bit real-time clock/counter with 8-bit programmable prescaler, power-on reset, watchdog timer with on-chip RC oscillator, and code-protection EPROM. The CMOS process keeps active supply current low while supporting 3.0V to 6.25V operation (industrial variants typically 3.0V-6.25V) and offers a power-saving SLEEP mode that wakes on pin change or watchdog timeout.
The PIC16C54 architecture uses a single accumulator (W register) and a two-level hardware stack, characteristic of baseline PIC devices. The Harvard memory map separates program EPROM (512 x 12) from data RAM (25 x 8) and the 7-bit file register space. The wide 12-bit instruction word allows most instructions to execute in a single instruction cycle (4 oscillator clocks), giving an effective 1 MIPS throughput at 4 MHz - adequate for logic replacement, simple sequencer, and glue-logic consolidation duties.
Typical applications include logic replacement in appliance controls, RC servo and PWM generator firmware, simple sensor interface front-ends (with external ADC), automotive interior trim controls, security keypads, low-end consumer devices, and industrial timer/counter modules. The industrial -40C to +85C range plus wide 3.0V-6.25V supply tolerance makes it robust for 5V industrial environments. The OTP EPROM is suitable for low-to-medium volume production where the final firmware is fixed before release.
When designing with the PIC16C54T-XTI/SO, use the Microchip MPASM assembler and MPLAB SIM/MPLAB X IDE for code development, and the MPLAB PM3 universal programmer for OTP device programming. The XT oscillator mode requires a 4 MHz crystal or ceramic resonator with the appropriate load capacitors per the datasheet. For new designs, consider migrating to the flash-based PIC16F54 in the same 18-pin SOIC footprint, which offers identical peripherals and in-circuit programmability.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that are not consolidated on a single manufacturer page.
Bộ thay thế dễ dàng lắp đặt cho PIC16C54T-XTI/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 PIC16C54T-XTI/SO (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Type, Core Architecture, Program Memory Size, Watchdog Timer.
PIC16C54T-XTI/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54-XTI/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54T-LPI/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C54CT-20I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C54T-RCI/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C54C-04I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C54T-XTI/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (baseline) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 768 B (512 x 12) |
| Data RAM | 25 B |
| Maximum CPU Frequency | 4 MHz (XT grade) |
| Instruction Set | 33 single-word instructions, 12-bit wide |
| I/O Pins | 12 (Port A + Port B) |
| Timers | 1 x 8-bit timer/counter with 8-bit prescaler |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| Supply Voltage Range | 3.0 V to 6.25 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| Hộp | 18-SOIC (0.295 in / 7.50 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Programming Method | OTP (one-time-programmable via MPLAB PM3) |
| Power-Saving Mode | SLEEP mode with wake on pin change or WDT |
Cấu hình chân PIC16C54T-XTI/SO
| Chân 1 | RA2 — Port A bit 2 (bidirectional I/O) |
| Chân 2 | RA3 — Port A bit 3 (bidirectional I/O) |
| Chân 3 | RTCC — Real-time clock/counter input (also RA0) |
| Chân 4 | MCLR — Master clear reset (active low) |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0 — Port B bit 0 (interrupt on change) |
| Chân 7 | RB1 — Port B bit 1 |
| Chân 8 | RB2 — Port B bit 2 |
| Chân 9 | RB3 — Port B bit 3 |
| Chân 10 | RB4 — Port B bit 4 |
| Chân 11 | RB5 — Port B bit 5 |
| Chân 12 | RB6 — Port B bit 6 |
| Chân 13 | RB7 — Port B bit 7 |
| Chân 14 | VDD — Positive supply voltage (3.0V-6.25V) |
| Chân 15 | OSC2 — Oscillator output (crystal/ceramic resonator) |
| Chân 16 | OSC1 — Oscillator input (crystal/ceramic resonator) |
| Chân 17 | RA1 — Port A bit 1 |
| Chân 18 | RA0 — Port A bit 0 (also TOCKI timer input) |
Ứng dụng tiêu biểu
PIC16C54T-XTI/SO phù hợp cho 6 Áp dụngs: Appliance Logic Replacement, Remote Control Encoder / Decoder, Sensor Signal Front-End, PWM Motor and Lighting Control, Automotive Interior Electronics, Industrial Timer and Counter Modules.
Appliance Logic Replacement
The PIC16C54T-XTI/SO excels at replacing discrete logic gates and 555-timer circuits in appliance control boards, where its 33-instruction baseline PIC core and 1 MIPS throughput at 4 MHz handle button scanning, LED multiplexing, relay sequencing, and buzzer tone generation. Its industrial -40C to +85C temperature range survives refrigerator and washing-machine environments, while the wide 3.0V-6.25V supply tolerates unregulated 5V rails. The OTP EPROM locks firmware against copying, and the 18-SOIC package fits the same footprint as legacy TTL/CMOS logic. Designers program the device using MPLAB PM3 during board-level programming, then seal firmware against field tampering.
Được đề xuất
Remote Control Encoder / Decoder
For IR remote controls, RF key fobs, and security keypads, the PIC16C54T-XTI/SO provides just enough program memory (512 x 12) to encode Manchester, RC5, or proprietary timing protocols while staying inside a tight BOM budget. Its SLEEP mode draws microamp-level current for battery-powered transmitters, waking on RB0 interrupt to service button presses. The 4 MHz XT grade gives 1us instruction cycle granularity - sufficient for sub-millisecond IR carrier timing. OTP EPROM prevents reverse-engineering of rolling-code security algorithms. Pair with a 38 kHz IR receiver module or 433 MHz SAW resonator for complete wireless link.
Được đề xuất
Sensor Signal Front-End
As a sensor interface front-end, the PIC16C54T-XTI/SO reads analog sensors through an external ADC (e.g., MCP3002 over SPI bit-bang) or interfaces digital sensors over one-wire or I2C protocols. Its 12 I/O pins allocate enough headroom for sensor enable, interrupt, and serial data lines while leaving room for status LEDs and a buzzer. The wide supply range (3.0V-6.25V) accommodates both 3.3V digital sensors and 5V analog front-ends. SLEEP mode with watchdog wake-up enables duty-cycled battery operation in environmental monitors. Industrial temperature grade suits HVAC and outdoor sensor enclosures.
Được đề xuất
PWM Motor and Lighting Control
The PIC16C54T-XTI/SO generates PWM waveforms for small DC motor speed control, LED dimming, and triac-fired lamp dimmers by toggling an I/O pin in software using the 8-bit timer interrupt. At 4 MHz the instruction cycle is 1us, allowing PWM frequencies from 100 Hz to 10 kHz with 8-bit duty-cycle resolution. The OTP EPROM stores fixed lighting scenes and motor acceleration curves without field reprogramming risk. SLEEP mode reduces idle current to microamps between user-triggered events. Industrial temperature range handles automotive interior LED strip and dashboard dimming applications reliably.
Được đề xuất
Automotive Interior Electronics
For non-safety automotive interior applications - such as HVAC mode switches, seat-position memory, dashboard illumination, and accessory timer circuits - the PIC16C54T-XTI/SO provides industrial-grade reliability at -40C to +85C in a compact 18-SOIC footprint. Its 3.0V to 6.25V supply range tolerates 12V-battery transients when paired with external regulation. Watchdog timer with on-chip RC oscillator prevents firmware lockup in electrically noisy environments. OTP EPROM locks configuration data and timing parameters. For safety-critical or AEC-Q100 applications, migrate to the PIC16F family with automotive qualification.
Được đề xuất
Industrial Timer and Counter Modules
The PIC16C54T-XTI/SO serves as the brain of standalone industrial timers, cycle counters, and process-interval controllers where fixed firmware is acceptable. Its on-chip 8-bit timer with 8-bit prescaler supports timing intervals from microseconds to seconds when fed by the 4 MHz XT oscillator. Multiple PIC16C54 chips can be networked over GPIO bit-banged UART for distributed control, or stand alone for cost-sensitive OEM equipment. The 18-SOIC package reflow-solders onto standard SMT lines. Industrial -40C to +85C operation suits factory-floor cabinets; OTP EPROM protects proprietary timing algorithms from field duplication.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C54T-XTI/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 | PIC16C54-XTI/SO | PIC16C54T-LPI/SO | PIC16C54CT-20I/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC (0.295 in) | 18-SOIC (0.295 in) - same | 18-SOIC (0.295 in) - same | 18-SOIC (0.295 in) - same |
| Program Memory | 768 B (512 x 12) OTP EPROM | 768 B (512 x 12) OTP EPROM | 768 B (512 x 12) OTP EPROM | 2 KB (approx) OTP EPROM |
| Max Oscillator Frequency | 4 MHz (XT) | 4 MHz (XT) | 32 kHz (LP) | 20 MHz |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Supply Voltage | 3.0V to 6.25V | 3.0V to 6.25V | 3.0V to 6.25V | 3.0V to 6.25V |
| Packing Media | Tape & Reel | Tube | Tape & Reel | Tape & Reel |
| Watchdog Timer | Yes | Yes | Yes | Yes |
| Lifecycle Status | NRND | NRND | NRND | NRND |
Bảo phân biệt quan trọng
- Industrial temperature grade with Tape & Reel packing (vsPIC16C54-XTI/SO)
- XT oscillator grade for 4 MHz crystal timing (vsPIC16C54T-LPI/SO)
- Baseline PIC core simplicity vs higher-end families (vsPIC16C54CT-20I/SO)
Ghi chú thiết kế
Estimated: At 4 MHz oscillator, 5V supply, and all I/O pins static, the PIC16C54T-XTI/SO draws approximately 1.7 mA active supply current per the PIC16C5x datasheet typical characteristics. In SLEEP mode current drops to under 1 uA with watchdog disabled, or roughly 5-7 uA with watchdog enabled. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the VDD pin (pin 14) to suppress switching transients. For battery-powered designs, gate the supply with an external P-channel MOSFET controlled by an I/O pin to achieve deep power-down states below 1 uA total system current.
The XT grade accepts a 4 MHz crystal or ceramic resonator between OSC1 (pin 16) and OSC2 (pin 15). Use load capacitors of 15-33 pF on each leg to ground, with values selected per the crystal manufacturer's CL specification. For cost-sensitive designs, an external 4 MHz CMOS clock can drive OSC1 directly while leaving OSC2 floating. Avoid routing the crystal traces near I/O switching lines; keep the oscillator loop under 5 mm trace length to prevent EMI coupling and frequency instability.
The OTP EPROM requires high-voltage programming (typically 13V on MCLR) using the Microchip MPLAB PM3 universal programmer or equivalent third-party device programmer. Production programming should occur before SMT soldering, or via in-circuit programming adapter headers if design allows. Once programmed, OTP bits cannot be erased - budget for one-time engineering parts and validate firmware on PIC16F54 (flash equivalent) before committing to OTP volume orders. Code-protect bits should be set for production to prevent firmware extraction.
Common mistakes include (1) leaving MCLR floating - tie to VDD through a 10 kohm resistor with a 100 nF decoupling cap directly at the pin; (2) exceeding the 6.25V absolute maximum VDD rating, which permanently damages the device; (3) using uninitialized RAM contents at startup - clear the file registers during initialization; (4) forgetting to enable the watchdog timer in electrically noisy environments where firmware lockup is a risk; (5) attempting to use PIC16C54 firmware on PIC16F5x without verifying register map differences - the baseline PIC core is similar but configuration bits differ between revisions.
Thông tin tuân thủ
RoHS compliance status not confirmed in current distributor data as of 2026-09-16; request certificate from Microchip or distributor. Not AEC-Q100 qualified - use PIC16F family for automotive safety-critical applications.