PIC16C558T-04I/SO - 8-bit PIC MCU, 3.5KB OTP, 18-SOIC | Microchip
MPN: PIC16C558T-04I/SO ✗ Cuối đờiPIC16C558T-04I/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, volatile data memory (RAM), and programmable peripherals into one package. The PIC16C558 belongs to Microchip's mid-range PIC16C family, which uses a RISC architecture with 35 single-word instructions. Within the broader component taxonomy, an MCU sits below the microprocessor/MCU hypernym and above the PIC16C mid-range sub-family; 8-bit MCUs like this one remain widely used in cost-sensitive, deterministic real-time applications.
Key features of the PIC16C558T-04I/SO include a 4 MHz maximum oscillator frequency (the -04 speed grade), 13 bidirectional I/O pins with individual direction control, an 8-bit timer/counter (TMR0) with an 8-bit prescaler, a Watchdog Timer with its own on-chip RC oscillator for reliable recovery, Power-on Reset, Brown-out Reset, and an in-circuit serial programming capability. Code protection and oscillator selection options are programmed into the device's configuration bits.
The architecture is built around a Harvard-separated program/data bus with a 14-bit instruction word, allowing most instructions to execute in a single 200 ns instruction cycle at 20 MHz. The '04 speed grade corresponds to a 4 MHz oscillator / 1 MHz instruction rate operation, simplifying EMI and power budgeting in industrial designs.
Typical applications include appliance control, automotive subsystems (body electronics, sensors, lighting), industrial automation (sensor interfaces, low-cost PLC I/O expanders), security and access control panels, and remote-control transmitters. The wide 2.5V-5.5V supply range and robust reset architecture make it a fit for harsh, electrically noisy environments.
When designing with the PIC16C558T-04I/SO, note that OTP memory cannot be re-programmed; for prototyping or field-upgradable firmware consider a Flash-based PIC16F equivalent. Place a 0.1 uF decoupling capacitor close to VDD, keep oscillator traces short, and respect the 4 MHz oscillator maximum for the -04 speed grade.
This page synthesizes distributor pricing as of 2026-09-16, drop-in alternatives drawn from the PIC16C558 same-family cross reference, and practical design notes not consolidated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16C558T-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 PIC16C558T-04I/SO (cùng hình factor và footprint) — khác nhau ở Package, Timers, Operating Temperature, Program Memory Type, Program Memory Size.
PIC16C558-04I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C558T-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C558T-04I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C558-20I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C554T-04I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F630-I/SL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C558T-04I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 16C, 8-bit RISC |
| Instruction Set Width | 14-bit, 35 single-word instructions |
| Program Memory Type | OTP (One-Time-Programmable EPROM) |
| Program Memory Size | 3.5 KB (2K x 14 words) |
| Data RAM | 128 bytes |
| Maximum CPU Frequency | 4 MHz (oscillator) / 1 MHz instruction rate |
| Instruction Execution Time | 200 ns (typical, 4 MHz input) |
| Supply Voltage (VDD) | 2.5 V to 5.5 V |
| I/O Pins | 13 bidirectional digital I/O |
| Timers | 1 x 8-bit Timer (TMR0) with 8-bit prescaler, 1 x WDT |
| Reset Sources | Power-on Reset (POR), Brown-out Reset (BOR), WDT timeout, MCLR |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial, I-suffix) |
| Hộp | 18-pin SOIC (SO), 7.50 mm body width, tape & reel |
| Kiểu lắp đặt | Surface Mount |
| Programming | In-circuit serial programming (ICSP) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16C558T-04I/SO
| Chân 1 | RA0 — Bidirectional digital I/O / ICSP data |
| Chân 2 | RA1 — Bidirectional digital I/O |
| Chân 3 | RA2 — Bidirectional digital I/O |
| Chân 4 | MCLR/VPP — Master Clear reset (active-low) / programming voltage input |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0/INT — Bidirectional digital I/O / external interrupt input |
| Chân 7 | RB1 — Bidirectional digital I/O |
| Chân 8 | RB2 — Bidirectional digital I/O |
| Chân 9 | RB3 — Bidirectional digital I/O |
| Chân 10 | RB4 — Bidirectional digital I/O |
| Chân 11 | RB5 — Bidirectional digital I/O |
| Chân 12 | RB6 — Bidirectional digital I/O / ICSP clock |
| Chân 13 | RB7 — Bidirectional digital I/O / ICSP data |
| Chân 14 | VDD — Positive supply (2.5 V to 5.5 V) |
| Chân 15 | OSC2/CLKOUT — Oscillator output / CLKOUT for RC mode |
| Chân 16 | OSC1/CLKIN — Oscillator input / CLKIN for external clock |
| Chân 17 | RA3 — Bidirectional digital I/O |
| Chân 18 | RA4/T0CKI — Bidirectional digital I/O / TMR0 clock input |
Ứng dụng tiêu biểu
PIC16C558T-04I/SO phù hợp cho 7 Áp dụngs: Automotive Body Electronics, Industrial Sensor Interface Module, Home Appliance Control Board, Security / Access Control Panel, Remote Control / RF Transmitter, Low-Cost PLC I/O Expander, HVAC Thermostat and Fan Controller.
Automotive Body Electronics
The PIC16C558T-04I/SO fits automotive body-electronics modules such as lighting controllers, seat controllers, and mirror actuators because its -40 C to +85 C industrial temperature range and robust Brown-out/Power-on Reset architecture tolerate under-hood electrical noise and cold-crank transients. The 3.5 KB OTP memory and 35-instruction PIC mid-range core are sufficient for state-machine-driven actuator logic. Pair the MCU with a CAN or LIN transceiver for body-network integration.
Được đề xuất
Industrial Sensor Interface Module
For industrial 4-20 mA sensor transmitters, the PIC16C558T-04I/SO's 13 digital I/O pins and TMR0 with prescaler enable precise timing of sensor scans and PWM-driven 4-20 mA loops. The 2.5 V-5.5 V VDD range accommodates both 3.3 V and 5 V industrial rails, while the 4 MHz instruction rate (1 MIPS) is adequate for slow polling of temperature, pressure, or level sensors. The WDT provides field-reliable recovery if the sensor bus locks up.
Được đề xuất
Home Appliance Control Board
The PIC16C558T-04I/SO is a strong fit for white-goods control boards (washing machines, dishwashers, microwave ovens) where its OTP memory and low BOM cost drive volume economics. The 13 I/O pins drive relay coils, triac gate controls, keypad matrix scans, and 7-segment LED multiplexing without external logic. Its Brown-out Reset survives brownouts caused by compressor inrush, and the 200 ns instruction cycle delivers deterministic real-time response to safety interlocks.
Được đề xuất
Security / Access Control Panel
Keypad-based access control and intrusion alarm panels leverage the PIC16C558T-04I/SO's 13 I/O to scan a 4x4 matrix keypad, drive status LEDs, and interface to magnetic-reed or PIR sensors. OTP memory secures the firmware against copying, important for security products, and the 128-byte RAM is sufficient for event buffering. The WDT prevents firmware lock-ups that would otherwise leave a door insecure; 200 ns instruction cycle scans the keypad without perceptible lag.
Được đề xuất
Remote Control / RF Transmitter
Battery-powered RF remote controls use the PIC16C558T-04I/SO because its low-cost OTP memory and 2.5 V-5.5 V range let the MCU run directly from a single 3 V coin-cell. TMR0 generates the carrier-frequency timing for ASK/OOK or FSK transmitters, while the 13 I/O accommodate matrix keypads and learning-mode buttons. The -40 C to +85 C industrial temperature range keeps the remote reliable in unheated garages and outdoor gate openers.
Được đề xuất
Low-Cost PLC I/O Expander
In distributed I/O for small PLCs, the PIC16C558T-04I/SO acts as a digital edge expander that aggregates push-buttons, limit switches, and indicator lamps back to a host controller over UART or SPI. The OTP memory locks in the I/O mapping at production time and prevents costly field misconfiguration. Its 200 ns instruction cycle processes discrete I/O faster than typical 10 ms PLC scan times, providing deterministic refresh without burdening the main CPU.
Được đề xuất
HVAC Thermostat and Fan Controller
Wall-mounted HVAC thermostats and standalone fan controllers use the PIC16C558T-04I/SO to read thermistor inputs, debounce user buttons, and PWM-drive triac-based fan speed stages. The 2.5 V-5.5 V supply range simplifies designs running from a small AC-DC wall adapter, while the -40 C to +85 C industrial rating is essential for equipment mounted near heating ducts. The Watchdog Timer protects the thermostat from firmware lock-ups that could leave a heater running indefinitely.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C558T-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 | PIC16C558-04I/SO | PIC16C558-20I/SO | PIC16F630-I/SL | PIC16C554T-04I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC (SO) | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SL) - same family, slim body | 18-SOIC (SO) - same |
| Program Memory | 3.5 KB OTP (2K x 14) | 3.5 KB OTP | 3.5 KB OTP | 1.75 KB Flash | 896 B OTP |
| Data RAM | 128 B | 128 B | 128 B | 64 B | 80 B |
| Max Oscillator Frequency | 4 MHz (-04 speed grade) | 4 MHz | 20 MHz | 20 MHz | 4 MHz |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Memory Type | OTP EPROM (one-time programmable) | OTP EPROM | OTP EPROM | Flash (re-programmable) | OTP EPROM |
| I/O Pins | 13 | 13 | 13 | 12 | 13 |
Bảo phân biệt quan trọng
- Industrial -40 C to +85 C temperature range in production-grade SOIC (vsPIC16C558T-04/SO)
- Higher oscillator headroom for future-proof designs (vsPIC16C558-20I/SO)
- Flash-based modern alternative recommended by Microchip (vsPIC16F630-I/SL)
Ghi chú thiết kế
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 14), with the trace to VDD being wide and short. The PIC16C558T-04I/SO draws peak transient current during internal EPROM programming pulses; without local decoupling, VDD droops can cause programming failures or spurious resets. Add a bulk 10 uF tantalum or aluminium polymer cap at the board's regulator output if the design drives heavy relay coils or triacs.
Keep the oscillator traces (OSC1/OSC2, pins 16/15) shorter than 10 mm and routed over a continuous ground pour. Long oscillator traces act as antennas and couple noise into the MCU's internal clock, causing timing jitter and Brown-out Reset misfires. If using a crystal, place the loading capacitors (typically 15-33 pF for the PIC16C558) as close to the crystal pads as possible - never at the MCU side of the traces.
Because the PIC16C558T-04I/SO is OTP (one-time programmable), a single misconfiguration of the configuration bits (oscillator mode, WDT enable, code protect, Brown-out threshold) bricks the part for that application. Verify config words in a Flash-based PIC16F prototype first, then port the final bit pattern to OTP production parts. Also note the -04 speed grade limits the oscillator to 4 MHz - using a 20 MHz crystal will cause erratic execution, not a faster MCU.
When driving long cables (e.g., relay coils, 4-20 mA loops), add an external TVS diode and series resistor at each I/O pin, and use shielded cable for analog or high-speed signals. The PIC16C558T-04I/SO has no internal ESD clamps rated above HBM 2 kV per pin; for industrial environments, prefer the PIC16F or PIC18 variants with stronger ESD/EMC performance, or add external protection such as the PESD5V0L1BA from Nexperia.
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified - PIC16C family targets industrial/commercial, not automotive safety-critical. Lead-free (Pb-free) and halogen-free per Microchip material declarations.
