PIC16LC558-04I/P - 4MHz 8-Bit OTP MCU, 3.5KB, 18-PDIP | Microchip
MPN: PIC16LC558-04I/P ✓ Hoạt độngPIC16LC558-04I/P Tóm tắt
An 8-bit microcontroller is a single-chip computer containing a CPU, program memory, RAM, and peripheral I/O on one die. The PIC16C5X baseline family uses a RISC architecture with a 33-instruction set, two-stack hardware, and OTP ROM for cost-sensitive embedded applications. LC variants denote the low-power CMOS process node, while the 16C5X core is one of the most widely deployed legacy 8-bit architectures in industrial control, white goods, and consumer devices.
Key features of the PIC16LC558-04I/P include a maximum instruction cycle of 250 ns at 4 MHz, integrated watchdog timer with on-chip RC oscillator, power-on reset, and up to 13 bidirectional I/O pins with programmable pull-ups. The device supports in-circuit serial programming via the RB6/RB7 pins on compatible parts and includes a hardware timer/counter (TMR0) with an 8-bit prescaler. Sleep mode current drops to a few microamps, enabling battery-friendly standby behavior in always-on systems.
The PIC16LC558 uses Microchip's classic baseline architecture, employing a 14-bit instruction word and separate program/data buses (Harvard) so that the fetch and execute phases can be pipelined. The ALU operates on 8-bit data with carry/borrow and bit-manipulation primitives that make single-bit I/O control concise in C or assembly. The LC process reduces dynamic power consumption compared with the original EPROM-based 16C5X parts, making this MCU a popular replacement in industrial installations where newer flash-based PICs are not form-fit compatible.
Typical applications include legacy industrial controllers, appliance user-interface boards, motor-driver slave controllers, simple sensor-front-end signal conditioning, and remote-control transmitter/receiver pairings. The 18-pin PDIP footprint also makes the part well suited to through-hole hobby and educational platforms, breadboard prototyping, and equipment retrofits where a surface-mount part cannot be used.
When designing with this device, note that OTP memory cannot be re-programmed, so firmware must be fully validated before final programming. Use decoupling capacitors of 0.1 µF close to VDD/VSS, follow the datasheet's oscillator layout guidelines, and respect the maximum I/O sink/source ratings of 25 mA per pin and 100 mA per port.
This page synthesizes current distributor pricing, parametric drop-in alternatives, and practical design notes for the PIC16LC558-04I/P that supplement the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC558-04I/P — 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 PIC16LC558-04I/P (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Mounting Type, Program Memory Size, Core Architecture, Instruction Cycle Time.
PIC16C558-04I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16LC558-04/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F627A-I/P
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Xem tài liệu →PIC16LC558-04I/P Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (baseline, 14-bit instruction word) |
| Family | PIC16C5X baseline |
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| RAM Size | 128 bytes |
| Maximum Clock Speed | 4 MHz |
| Instruction Cycle Time | 250 ns at 4 MHz |
| Supply Voltage (VDD) | 3 V to 6.25 V |
| I/O Pins | 13 |
| Number of I/O Ports | 2 (PORTA, PORTB) |
| Timers | 1 x 8-bit (TMR0 with prescaler) |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| Reset | Power-on Reset (POR) |
| Package Type | 18-pin PDIP (0.300 inch, 7.62 mm), through-hole |
| Nhiệt độ hoạt động | -40 °C to +85 °C (Industrial) |
| Kiểu lắp đặt | Through-Hole |
Cấu hình chân PIC16LC558-04I/P
| Chân 1 | RA2 — Bidirectional I/O, PORTA bit 2 |
| Chân 2 | RA1 — Bidirectional I/O, PORTA bit 1 |
| Chân 3 | RA0 — Bidirectional I/O, PORTA bit 0 |
| Chân 4 | /MCLR — Master Clear (Reset), active-low input |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0 — Bidirectional I/O, PORTB bit 0 |
| Chân 7 | RB1 — Bidirectional I/O, PORTB bit 1 |
| Chân 8 | RB2 — Bidirectional I/O, PORTB bit 2 |
| Chân 9 | RB3 — Bidirectional I/O, PORTB bit 3 |
| Chân 10 | RB4 — Bidirectional I/O, PORTB bit 4 |
| Chân 11 | RB5 — Bidirectional I/O, PORTB bit 5 |
| Chân 12 | RB6 — Bidirectional I/O, PORTB bit 6 |
| Chân 13 | RB7 — Bidirectional I/O, PORTB bit 7 |
| Chân 14 | VDD — Positive supply voltage (3 V to 6.25 V) |
| Chân 15 | OSC2 — Oscillator output (crystal/RC) |
| Chân 16 | OSC1 — Oscillator input (crystal/RC) |
| Chân 17 | RA3 — Bidirectional I/O, PORTA bit 3 |
| Chân 18 | RA4 — Bidirectional I/O (open-drain), PORTA bit 4 |
Ứng dụng tiêu biểu
PIC16LC558-04I/P phù hợp cho 6 Áp dụngs: Industrial Control Slave Modules, White Goods and Appliance UI Boards, Hobby Electronics and Education Kits, Sensor Front-End Signal Conditioning, Motor Control and Driver Slave Controllers, Remote Control Transmitter/Receiver Pairings.
Industrial Control Slave Modules
The PIC16LC558-04I/P fits industrial control slave modules that require deterministic 8-bit timing on legacy PLC backplanes. Its 4 MHz clock gives 1 µs instruction cycle granularity, adequate for sequencing solenoids, scanning opto-isolated inputs, and refreshing indicator LEDs at scan rates below 10 ms. The 13 I/O pins map cleanly to two 8-bit ports, simplifying PLC firmware that talks to upstream RS-485 masters. Compared with newer Cortex-M0 parts, the baseline PIC core consumes less current in sleep mode and survives -40 °C to +85 °C industrial ambient temperature without derating. The OTP memory is intentional: once production firmware is qualified, the MCU is locked and immune to field tampering. The 18-pin PDIP also suits retrofits where through-hole replacement is mandatory on existing field wiring.
Được đề xuất
White Goods and Appliance UI Boards
In washing machines, dishwashers, and microwave ovens, the PIC16LC558-04I/P powers user-interface boards that drive seven-segment displays, scan keypads, and switch relays through triacs. Its 13 I/O pins handle a 4x4 keypad matrix plus 4-7 digit LED multiplexing without external logic. The 3 V to 6.25 V supply range matches raw rectified mains after buck regulation, eliminating the need for additional LDO stages. OTP memory keeps firmware cost below $0.30 BOM contribution at high volume, a key reason appliance OEMs continue to specify the PIC16C5X baseline family. The LC variant's low sleep current extends standby power budget to meet ENERGY STAR no-load requirements under 1 W. Industrial -40 to +85 °C operation covers garage and outdoor-appliance environments.
Được đề xuất
Hobby Electronics and Education Kits
The PIC16LC558-04I/P remains popular in hobby and education platforms because the 18-pin PDIP is breadboard-friendly with 0.1 inch pin pitch. Students learn baseline RISC assembly with only 33 instructions, and the Harvard architecture (separate program/data buses) demonstrates concepts that scale up to modern ARM cores. The 4 MHz clock is comfortable for beginners learning timing loops without bus contention. OTP limitation is acceptable for kits since firmware is final once verified, and the $1.73-2.85 unit price (as of 2026-09-22) keeps student-project BOM affordable. The exposed through-hole pins also serve as convenient probe points for logic-analyzer labs. Microchip's MPLAB X IDE supports PIC16C5X assembly and C via the XC8 compiler, maintaining an active learning ecosystem.
Được đề xuất
Sensor Front-End Signal Conditioning
The PIC16LC558-04I/P handles sensor front-end signal conditioning in simple thermostats, smoke detectors, and humidity monitors where its 4 MHz clock and 8-bit ALU compute moving averages and threshold comparisons without an ADC. The baseline PIC's bit-manipulation primitives make single-pin I/O control concise for resistive-sensor bridge excitation. The 3 V minimum supply suits 3.3 V regulated rails from a CR2032 or two AA cells. LC process variants draw under 5 µA in sleep mode, prolonging battery life in intermittently-sampled sensor nodes. OTP memory prevents accidental field reprogramming that could desensitize a safety-critical smoke alarm. Operating temperature -40 to +85 °C covers unheated attics and outdoor enclosures.
Được đề xuất
Motor Control and Driver Slave Controllers
The PIC16LC558-04I/P acts as a slave controller next to a main DSP or MCU in stepper-motor and small-BLDC driver boards. It handles PWM generation via timer overflow tricks, direction sequencing, end-stop debouncing, and overcurrent fault shutdown. Its 4 MHz clock provides 1 µs resolution for step pulse timing on slow steppers up to 1000 pps. The 13 I/O pins map to step/dir/enable plus three limit switches and a fault output. Baseline PIC determinism - every instruction takes exactly one cycle - simplifies worst-case latency analysis for safety functions. Industrial temperature rating -40 to +85 °C covers motor housings. OTP memory locks calibrated motor parameters into production firmware. Low cost keeps slave-controller BOM contribution below $3 per axis.
Được đề xuất
Remote Control Transmitter/Receiver Pairings
The PIC16LC558-04I/P implements low-cost RF/IR remote-control transmitters and receivers where 4 MHz is sufficient for Manchester-encoded bit streams at sub-1 kbps. The 13 I/O pins scan 4x4 keypads or 16-button matrices and drive a transmitter LED or 433 MHz SAW-based OOK modulator. Sleep current under 5 µA enables coin-cell operation for years. Industrial temperature rating covers outdoor garage-door and gate-controller environments. OTP memory locks pairing codes and rolling-key algorithms against cloning. 18-pin PDIP remains the dominant hobby and small-volume security hardware format. Compared with newer PIC16F enhanced baselines, the LC558 is preferred when re-programmability is undesirable (anti-tamper) and unit cost matters more than peripheral richness.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC558-04I/P — 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 | PIC16C558-04I/P | PIC16LC558-04/P | PIC16LC558-04I/SO | PIC16C558-04I/SO | PIC16F627A-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-PDIP (0.300 inch) | 18-PDIP (0.300 inch) - same | 18-PDIP (0.300 inch) - same | 18-SOIC (SMD, different footprint) | 18-SOIC (SMD, different footprint) | 18-PDIP (0.300 inch) - same |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 1.75 KB Flash |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 224 bytes |
| Max Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 16 |
| Operating Voltage | 3 V to 6.25 V | 3 V to 6.25 V | 3 V to 6.25 V | 3 V to 6.25 V | 3 V to 6.25 V | 2 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | 0 °C to +70 °C (Commercial) | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) |
| Memory Type | OTP | OTP | OTP | OTP | OTP | Flash (re-programmable) |
Bảo phân biệt quan trọng
- Low-power CMOS LC process variant (vsPIC16C558-04I/P)
- Flash re-programmability for development (vsPIC16LC558-04I/P (OTP))
- Surface-mount option for compact designs (vsPIC16LC558-04I/P (PDIP))
Ghi chú thiết kế
The PIC16LC558-04I/P draws approximately 2 mA at 4 MHz and 5 V, dropping to under 5 µA in sleep mode (watchdog disabled). Place a 0.1 µF decoupling capacitor within 5 mm of the VDD pin (14) and a bulk 10 µF electrolytic on the supply rail. In noisy industrial environments add a ferrite bead on VDD to suppress conducted EMI from relays or motor drivers sharing the same 5 V rail. The LC process variant is preferred over the original PIC16C558 for battery-backed designs because quiescent current is roughly 30% lower.
For reliable oscillator operation on 18-pin PDIP, place the crystal or resonator within 10 mm of OSC1 (pin 16) and OSC2 (pin 15). Keep these traces short and guard them with a ground pour to minimize EMI coupling into adjacent signal traces. If using an external RC oscillator, place the resistor and capacitor close to OSC1 and bypass OSC2. The /MCLR pin (4) requires a 10 kΩ pull-up to VDD; some designs add a diode to VDD to protect against ESD-induced latch-up. Follow Microchip's 'Oscillator Layout Tips' application note for sensitive timing circuits.
Estimated: OTP memory on the PIC16LC558 can be programmed only once per cell - verify your firmware in a flash-equivalent (e.g., PIC16F627A-I/P) before committing to OTP production runs. Estimated: total sink/source current per pin is 25 mA and per port is 100 mA; exceeding this may damage the I/O driver. Do not leave unused I/O pins floating - configure them as outputs and tie to ground, or enable weak pull-ups if available. Do not apply voltage above 6.25 V on VDD or below -0.3 V on any pin including OSC inputs. Use /MCLR properly; floating /MCLR may cause intermittent resets in electrically noisy environments.
Thông tin tuân thủ
Lifecycle status ACTIVE per distributor listings as of 2026-09-22. RoHS/REACH/lead-free status was not present in the Verified Web Data excerpt - confirm with Microchip product compliance documentation before EU shipments. Not AEC-Q100 qualified - this is an industrial-grade part, not automotive-grade.
