PIC16LC554-04I/SO - 8-Bit 4MHz OTP MCU 896B | Microchip
MPN: PIC16LC554-04I/SO ✓ Hoạt độngPIC16LC554-04I/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory (ROM/EPROM/Flash), volatile data memory (RAM), and configurable peripheral I/O. Within the broader taxonomy, an MCU belongs to the semiconductor > integrated circuit > microcontroller category. The PIC16C5x family uses a Harvard RISC architecture with only 33 single-cycle instructions, enabling deterministic 200 ns instruction execution at 4 MHz. PIC microcontrollers are widely used in embedded control applications where deterministic timing, low power, and a small footprint matter more than raw computational throughput.
Key features include 4 MHz maximum clock, 33 single-cycle RISC instructions (except program branches which take two cycles), 12-13 bidirectional I/O ports, an integrated watchdog timer for fault recovery, a power-on reset circuit, and an operating voltage range of 3.0 V to 6.25 V suitable for both 3.3 V and 5 V systems. The 'LC' prefix denotes the low-power CMOS variant optimized for battery-powered applications, while the 'I' suffix in the part number indicates the industrial operating temperature range of -40 °C to +85 °C. The device is offered in a 300-mil 18-pin SOIC package and is supplied in tube or tape-and-reel format.
The PIC16LC554-04I/SO is built on Microchip's proven baseline PIC16C5x core, which uses a 12-bit instruction word and a separate data-memory bus. Its EPROM-based program memory allows one-time in-system programming via standard device programmers, making it well suited for low-to-medium volume production runs where mask-ROM programming economics are not justified. Internal peripherals include a watchdog timer with on-chip RC oscillator, a power-on reset generator, and a software-controlled SLEEP mode for ultra-low standby current.
Typical applications include appliance controllers, sensor signal conditioning front-ends, automotive body electronics (non-safety subsystems), HVAC thermostat controls, simple PWM-driven lighting controllers, and battery-powered handheld instruments. The wide 3.0 V to 6.25 V supply range makes the part adaptable to both 3.3 V and 5 V rails common in industrial embedded designs.
When designing with this part, engineers should note that program memory is OTP (one-time programmable), so firmware must be fully validated before production programming. The 4 MHz maximum clock limits computational throughput compared to PIC16F-series or PIC18F alternatives, so the device is best suited to control-loop tasks rather than DSP or communication protocol stacks.
This page synthesizes distributor pricing, drop-in alternative MPNs, parametric comparison data, and practical design notes not found in the standalone manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC554-04I/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 PIC16LC554-04I/SO (cùng hình factor và footprint) — khác nhau ở Program Memory Size, Core Architecture, Watchdog Timer, Program Memory Type, Operating Temperature Range.
PIC16LC554-04E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC554T-04I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC554-04I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC554-04I/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F54-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC554-04I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16C5x 8-bit RISC |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 896 bytes (512 x 14) |
| Data RAM | 80 bytes |
| Maximum CPU Clock | 4 MHz |
| Instruction Cycle | 200 ns at 4 MHz |
| Instruction Set Size | 33 single-cycle instructions (12-bit) |
| I/O Pins | 12-13 bidirectional |
| Điện áp cung cấp | 3.0 V to 6.25 V |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C (Industrial, 'I' suffix) |
| Watchdog Timer | Yes, on-chip RC oscillator |
| Power-On Reset | Yes (internal) |
| SLEEP / Low-Power Mode | Yes (software-controlled) |
| Hộp | 18-pin SOIC (SO, 300 mil) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16LC554-04I/SO
| Chân 1 | RA2 — Bidirectional I/O port A bit 2 |
| Chân 2 | RA3 — Bidirectional I/O port A bit 3 |
| Chân 3 | T0CKI — Timer0 clock input / RA4 |
| Chân 4 | MCLR — Master Clear (reset) input, active low |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0 — Bidirectional I/O port B bit 0 (INT) |
| 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 | VDD — Positive supply voltage (3.0-6.25 V) |
| Chân 15 | OSC2 — Oscillator output / RA0 |
| Chân 16 | OSC1 — Oscillator input / RA1 |
| Chân 17 | NC — Not connected (per datasheet) |
| Chân 18 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16LC554-04I/SO phù hợp cho 6 Áp dụngs: Appliance Control Boards, HVAC Thermostat Control, Battery-Powered Sensor Front-Ends, Automotive Body Electronics (Non-Safety), Simple PWM Lighting Controllers, Handheld Test Instruments.
Appliance Control Boards
The PIC16LC554-04I/SO fits appliance controllers (washing machines, dishwashers, microwave ovens) because its 4 MHz baseline core delivers deterministic 200 ns instruction timing for relay and triac sequencing, while 80 bytes RAM is sufficient for state-machine firmware and sensor debouncing. The 3.0-6.25 V supply range accepts both legacy 5 V and modern 3.3 V logic rails, and the 12-13 I/O pins can drive up to 7-segment displays, keypad matrices, and zero-cross detectors. The OTP program memory suits mature production firmware that has been fully validated.
Được đề xuất
HVAC Thermostat Control
The PIC16LC554-04I/SO serves residential and commercial HVAC thermostats because its on-chip watchdog timer and power-on reset ensure reliable recovery from brownouts and EMI events on the mains-coupled power supply. The 12-bit instruction width and 33-instruction RISC core are well suited to PID loop calculations on temperature inputs, while the wide 3.0-6.25 V supply lets the MCU run directly from a rectified 5 V rail. Industrial temperature rating (-40 °C to +85 °C) handles equipment-room installations.
Được đề xuất
Battery-Powered Sensor Front-Ends
The PIC16LC554-04I/SO is well matched to battery-powered wireless sensor nodes because the 'LC' low-power CMOS process variant and software-controlled SLEEP mode drop quiescent current to microamp levels for duty-cycled operation. The 4 MHz clock provides enough throughput to service ADC sampling, simple encryption, and RF packet framing at low duty cycles. The 3.0 V minimum supply allows direct connection to two AA alkaline cells in series, and 12 I/O lines can scan multi-axis sensor arrays and drive a low-power RF transceiver.
Được đề xuất
Automotive Body Electronics (Non-Safety)
The PIC16LC554-04I/SO handles non-safety automotive body modules such as mirror controllers, seat-position memories, and interior lighting because the industrial temperature range and proven PIC16C5x baseline core deliver cost-effective deterministic control. The watchdog timer catches software lockups in electrically noisy 12 V vehicle environments. Note: this part is NOT AEC-Q100 qualified, so it must remain in non-safety subsystems only; for safety-critical body ECUs migrate to a Q-graded MCU.
Được đề xuất
Simple PWM Lighting Controllers
The PIC16LC554-04I/SO drives low-cost PWM lighting controllers (LED strips, accent lighting, dimmers) because the 4 MHz clock supports software-generated PWM at audio-bypass frequencies above 20 kHz, eliminating flicker in residential and commercial LED installations. The 12-13 I/O pins can output multiple PWM channels for RGB or tunable-white fixtures, and the 3.0-6.25 V supply lets the MCU share a 3.3 V or 5 V rail with the LED driver. OTP memory ensures production-cost efficiency for high-volume lighting SKUs.
Được đề xuất
Handheld Test Instruments
The PIC16LC554-04I/SO acts as the control MCU in handheld multimeters, insulation testers, and simple oscilloscope front-ends because the 'LC' low-power process and SLEEP mode extend battery life for field-service technicians. The 80 bytes RAM is sufficient for measurement state, calibration constants, and LCD driver frames, while 12-13 I/O pins handle keypad scanning, mode switching, and range-selection relays. The industrial temperature range supports outdoor and unconditioned-environment usage.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC554-04I/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 | PIC16LC554-04E/SO | PIC16LC554T-04I/SO | PIC16LC554-04I/P | PIC16LC554-04I/SS | PIC16F54-I/SO |
|---|---|---|---|---|---|---|
| Package | 18-pin SOIC (300 mil) | 18-pin SOIC (300 mil) - same | 18-pin SOIC (300 mil) - same | 18-pin PDIP (through-hole) | 20-pin SSOP | 18-pin SOIC (300 mil) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 896 B Flash |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash (reprogrammable) |
| Max CPU Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Data RAM | 80 B | 80 B | 80 B | 80 B | 80 B | 25 B |
| Supply Voltage | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 2.0 V to 5.5 V |
| Temperature Range | -40 °C to +85 °C (I) | -40 °C to +125 °C (E) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) |
| I/O Pins | 12-13 | 12-13 | 12-13 | 12-13 | 20 | 12 |
| Watchdog Timer | Yes (internal RC) | Yes (internal RC) | Yes (internal RC) | Yes (internal RC) | Yes (internal RC) | Yes (internal RC) |
Bảo phân biệt quan trọng
- Higher data RAM than flash-based equivalent (vsPIC16F54-I/SO)
- Wider supply voltage range (vsPIC16F54-I/SO)
- Industrial temperature vs narrow equivalent (vsPIC16LC554-04I/SS (20-pin SSOP variant))
Ghi chú thiết kế
Estimated: at VDD = 5.0 V and 4 MHz active CPU clock, the PIC16LC554-04I/SO draws roughly 2 mA active and below 5 µA in SLEEP mode (per Microchip PIC16C5x family typical curves). For battery-powered designs, use SLEEP aggressively between sensor-sampling events and wake via watchdog timer interrupt to keep average current in the tens of microamps. Place a 0.1 µF decoupling capacitor as close to VDD pin 14 as possible, with a bulk 10 µF tantalum or ceramic on the same supply rail.
OTP memory can be programmed exactly once — there is no erasure pathway. Pre-production units (windowed CERDIP PIC16LC554-JW variants) should be used for firmware validation; once production OTP units are programmed, any silicon revision or bug requires a new tape-out cost. Always keep at least one engineering windowed device on hand for re-validation if the firmware needs late changes.
Route the MCLR pin (pin 4) directly to a pull-up resistor (typically 10 kΩ) and place any reset capacitor as close to the MCLR pad as possible to avoid noise injection. Keep the oscillator traces (OSC1/OSC2, pins 15-16) short and shield them from high-current switching traces; for crystal mode add 15-33 pF load caps to ground. The SOIC-18 thermal pad is not present — this device dissipates negligible power and needs no copper pour for cooling.
The PIC16LC554-04I/SO's 12-13 I/O pins can source/sink up to 25 mA per pin (per pin) and 90 mA total across all I/O, but practical EMI-safe designs typically limit switching currents to 10 mA. For relay or triac drive, add a flyback diode (1N4148) across inductive loads and a snubber (100 Ω + 0.1 µF) across the triac to keep conducted emissions within industrial EMC limits.
Thông tin tuân thủ
RoHS compliant per Microchip product page; not AEC-Q100 qualified (industrial grade only); conflict-minerals compliant per Microchip CMRT. Halogen-free status not stated in the verified distributor data — set to unknown.
