PIC16C554T-20I/SO - 8-Bit 20MHz OTP MCU, 896B, 18-SOIC | Microchip
MPN: PIC16C554T-20I/SO ✓ Hoạt độngPIC16C554T-20I/SO Tóm tắt
What is an OTP microcontroller? An OTP (One-Time Programmable) microcontroller contains non-volatile program memory that can be written exactly once by the user, typically using a device programmer before PCB mounting. OTP MCUs sit between Mask ROM devices (cheapest at very high volumes but require factory programming) and Flash-based MCUs (re-programmable in-circuit). For low-to-medium volume production, OTP parts offer lower per-unit cost than Flash parts without the tooling NRE of Mask ROM.
Key features include a RISC instruction set with only 33 single-word instructions, two 8-bit I/O ports (RA and RC), one 8-bit timer (TMR0), a watchdog timer with its own on-chip RC oscillator, power-on reset, brown-out detection, and an operating voltage range from 2.5 V to 5.5 V. The PIC16C5x baseline core has no hardware interrupt controller and uses a polled software architecture.
The device uses a Harvard architecture with separate program and data buses, executing one instruction per instruction cycle (4 oscillator clocks) for a 200 ns instruction time at 20 MHz. This deterministic single-cycle execution makes the PIC16C554 well-suited for real-time control loops where precise timing matters. The baseline core has a 2-level deep hardware stack and no software stack pointer.
Typical applications include appliance control, sensor signal conditioning, LED lighting controllers, simple motor control, remote controls, battery-powered instruments, and automotive body electronics (non-safety). The industrial temperature range and small 18-SOIC footprint suit dense control boards.
When designing with this part, note that OTP memory means firmware must be fully verified before programming. Allow for a programming connector footprint (ICSP) on the PCB if in-system verification is required during pilot runs. Always place a 0.1 uF decoupling capacitor within 5 mm of the VDD pin.
Bộ thay thế dễ dàng lắp đặt cho PIC16C554T-20I/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 PIC16C554T-20I/SO (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Size, Timers, Core Architecture, Family.
PIC16C554-20I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C554T-20/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C554T-04I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F54-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C554T-20I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16C5x baseline (8-bit RISC) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 896 bytes (512 x 14 bits) |
| Data RAM | 80 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns (1 cycle = 4 oscillator clocks) |
| Operating Voltage (VDD) | 2.5 V to 5.5 V |
| I/O Pins | 13 (PORTA 4-bit + PORTC 8-bit) |
| Timers | 1 x 8-bit (TMR0) + 1 x WDT |
| Hộp | 18-SOIC (7.50 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial, I-suffix) |
| Speed Grade | -20 (20 MHz oscillator max) |
| Packaging | Tape & Reel (T-suffix) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16C554T-20I/SO
| Chân 1 | RA2 — Bidirectional I/O pin, PORTA bit 2 |
| Chân 2 | RA3 — Bidirectional I/O pin, PORTA bit 3 |
| Chân 3 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input (open-drain) |
| Chân 4 | MCLR/VPP — Master clear reset (active low) / programming voltage input |
| Chân 5 | VSS — Ground reference |
| Chân 6 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Chân 7 | OSC2/CLKOUT — Oscillator crystal output / clock output (Fosc/4) |
| Chân 8 | RC0 — Bidirectional I/O pin, PORTC bit 0 |
| Chân 9 | RC1 — Bidirectional I/O pin, PORTC bit 1 |
| Chân 10 | RC2 — Bidirectional I/O pin, PORTC bit 2 |
| Chân 11 | RC3 — Bidirectional I/O pin, PORTC bit 3 |
| Chân 12 | RC4 — Bidirectional I/O pin, PORTC bit 4 |
| Chân 13 | RC5 — Bidirectional I/O pin, PORTC bit 5 |
| Chân 14 | RC6 — Bidirectional I/O pin, PORTC bit 6 |
| Chân 15 | RC7 — Bidirectional I/O pin, PORTC bit 7 |
| Chân 16 | VDD — Positive supply voltage (2.5 V to 5.5 V) |
| Chân 17 | RA0 — Bidirectional I/O pin, PORTA bit 0 |
| Chân 18 | RA1 — Bidirectional I/O pin, PORTA bit 1 |
Ứng dụng tiêu biểu
PIC16C554T-20I/SO phù hợp cho 7 Áp dụngs: Appliance Control Board, LED Lighting Controller, Battery-Powered Sensor Interface, Remote Control Transmitter, Simple Motor Speed Control, Automotive Body Electronics, Industrial Control Logic Replacement.
Appliance Control Board
The PIC16C554T-20I/SO fits appliance control boards because its 20 MHz PIC16C5x baseline core delivers deterministic 200 ns instruction cycles ideal for washing-machine motor timing loops and dishwasher cycle sequencing. Its 896-byte OTP memory holds a complete wash-program state machine with parameter tables; the 80-byte RAM accommodates sensor buffers and timer variables for water level, temperature, and door-lock state. The wide 2.5 V to 5.5 V VDD range tolerates unregulated supply rails common in white-goods designs, while the -40 C to +85 C industrial temperature rating covers under-counter and outdoor-utility installations. PIC16C554T-20I/SO pairs well with ULN2003A relay drivers and zero-cross solid-state relays for heater and motor switching.
Được đề xuất
LED Lighting Controller
For LED lighting drivers and color-mixing controllers, the PIC16C554T-20I/SO's 20 MHz CPU provides sufficient throughput for PWM generation across multiple channels using software bit-banging on PORTC. The 80-byte RAM supports a color-lookup table and PWM duty-cycle buffers for RGB or RGBW strips, while the 13 digital I/O pins drive 8 LED channels plus user-interface buttons. The 2.5 V to 5.5 V operating range matches battery-powered and USB-powered LED fixtures, and the industrial temperature range allows installation in outdoor or enclosed luminaires. Brown-out reset protects LEDs from inrush flicker when power sags during dimming transitions.
Được đề xuất
Battery-Powered Sensor Interface
The PIC16C554T-20I/SO suits battery-powered sensor nodes thanks to its sleep-friendly 8-bit baseline core that drops current draw when the watchdog-timer wakes the MCU for periodic sensor reads. The 80-byte RAM buffers sensor samples for averaging before transmission, and the 13 I/O pins multiplex several analog sensors via external analog multiplexers or discrete FETs. Operating down to 2.5 V extends usable battery life from alkaline or Li-primary cells below their nominal voltage, while the -40 C to +85 C range covers outdoor environmental sensors. The 200 ns instruction cycle at 20 MHz executes simple protocol stacks (UART, one-wire) in real time.
Được đề xuất
Remote Control Transmitter
For IR/RF remote controls and key-fob transmitters, the PIC16C554T-20I/SO's small 18-SOIC footprint fits compact handheld enclosures while its 896-byte OTP memory stores button-scan tables and rolling-code transmission routines. The 20 MHz clock drives accurate 38 kHz IR carrier generation via timer interrupts, and the 13 I/O pins support up to 12-button matrix keyboards plus status LEDs. Brown-out detection prevents corrupted transmissions when battery voltage sags during button presses. The -40 C to +85 C industrial range handles outdoor or automotive interior environments.
Được đề xuất
Simple Motor Speed Control
The PIC16C554T-20I/SO controls small DC brush motors and unidirectional fans using its 8-bit TMR0 for back-EMF or tachometer feedback and software-based PWM on PORTC pins. The 80-byte RAM holds RPM setpoint, current speed, and PID state variables, while the 200 ns instruction cycle at 20 MHz executes a PID loop at kHz rates. The 2.5 V to 5.5 V VDD range supports 3.3 V and 5 V motor-driver boards. Industrial temperature rating suits automotive accessory fans and HVAC blowbox controllers.
Được đề xuất
Automotive Body Electronics
For non-safety automotive body modules such as seat controllers, mirror adjusters, and interior lighting, the PIC16C554T-20I/SO delivers a cost-optimized 8-bit solution in the 18-SOIC package. The -40 C to +125 C automotive temperature range (note: I-suffix is -40 to +85 C; for +125 C use E-suffix parts) covers cabin environments, and the 13 I/O pins interface to H-bridge drivers and switch-scan matrices. The 20 MHz CPU handles CAN-like software bit-banging for body networks, and the OTP memory locks firmware against field tampering.
Được đề xuất
Industrial Control Logic Replacement
The PIC16C554T-20I/SO replaces legacy discrete logic or 8051-based designs where cost reduction and footprint shrink are priorities. Its 20 MHz PIC16C5x core executes simple ladder-logic replacements, and the 13 I/O pins sink 25 mA per pin directly, driving small relays and optocouplers without external buffers. Industrial temperature range plus the 2.5 V to 5.5 V supply tolerance suit 24 V industrial systems with simple linear regulators. OTP memory prevents firmware modification in deployed equipment.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C554T-20I/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 | PIC16C554-20I/SO | PIC16C554T-20/SO | PIC16C554T-04I/SO | PIC16F54-I/SO |
|---|---|---|---|---|---|
| Package | 18-SOIC (7.50 mm) | 18-SOIC (7.50 mm) - same | 18-SOIC (7.50 mm) - same | 18-SOIC (7.50 mm) - same | 18-SOIC (7.50 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP (896 B) | OTP (896 B) | OTP (896 B) | OTP (896 B) | Flash (768 B) |
| Max CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 20 MHz |
| Data RAM | 80 bytes | 80 bytes | 80 bytes | 80 bytes | 25 bytes |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | 0 C to +70 C (Commercial) | -40 C to +85 C | -40 C to +85 C |
| Operating Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.0 V to 5.5 V |
| I/O Pins | 13 | 13 | 13 | 13 | 12 |
| Reprogrammable | No (OTP) | No (OTP) | No (OTP) | No (OTP) | Yes (Flash) |
Bảo phân biệt quan trọng
- Higher data RAM than Flash-based PIC16F54 equivalent (vsPIC16F54-I/SO)
- Lower per-unit cost than Flash equivalents at high volumes (vsPIC16F54-I/SO)
- Same-package drop-in at 20 MHz speed grade (vsPIC16C554T-04I/SO)
Ghi chú thiết kế
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 16) and a 10 uF bulk capacitor on the same supply rail near the IC. The PIC16C554 brown-out reset (BOR) circuit holds the device in reset when VDD drops below the BOR threshold (~2.1 V to 2.4 V typical), preventing corrupted execution at low voltage. Estimated: at 20 MHz with all I/O switching, peak VDD current draw is roughly 10-15 mA; average is lower because the core sleeps in idle loops.
Keep the MCLR/VPP pin (pin 4) free of large capacitance - the in-circuit serial programming (ICSP) pulses a high voltage (around 13 V) on this pin during device programming. A 10 kohm pull-up resistor to VDD and a decoupling capacitor of 0.1 uF or less is typical. If using a crystal oscillator, place the crystal within 5 mm of pins 6 and 7 and guard the traces with a ground pour to reduce EMI.
OTP memory cannot be re-programmed - any code bug found after programming requires scrapping the part. Plan a prototype run with PIC16F54-I/SO (pin-compatible Flash equivalent in 18-SOIC) for development, then move to PIC16C554T-20I/SO for production. Also note that the PIC16C5x baseline core has NO interrupts - all event handling is polled via register flags, which affects firmware architecture.
At 20 MHz and 5 V supply, the PIC16C554T-20I/SO dissipates approximately 50-75 mW worst case. With the 18-SOIC package theta_JA around 70 C/W, junction temperature rises 4-5 C above ambient at typical office temperatures - well within the 150 C absolute maximum. No heatsink or thermal management is required for normal operation. Estimated using I/O toggling and core active current from datasheet.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified (industrial-grade I-suffix, not automotive Q-grade). Lead-free (Pb-free) reflow compatible per JEDEC J-STD-020.