PIC16C558T-04/SS - 8-Bit OTP MCU, 4MHz, 3.5KB | Microchip
MPN: PIC16C558T-04/SS ✓ Hoạt độngPIC16C558T-04/SS Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data path, integrating a CPU, RAM, ROM/Flash/EPROM, and peripherals. OTP (One-Time Programmable) variants use EPROM-based program memory, which is programmed once with a device programmer and cannot be erased, making OTP MCUs the lowest-cost option for high-volume, fixed-code consumer and industrial products. PIC microcontrollers follow the RISC (Reduced Instruction Set Computer) Harvard architecture, separating program and data memory buses for deterministic instruction timing.
Key features of the PIC16C558T-04/SS include 4 MHz maximum operating frequency, 128 bytes of RAM, 13 I/O pins with individual direction control, a watchdog timer with on-chip RC oscillator, power-on reset, power-saving SLEEP mode, and an operating voltage range of 3.0 V to 6.25 V. The '04' speed suffix indicates a 4 MHz oscillator; the 'T' suffix denotes tape-and-reel packaging; '/SS' designates the 20-pin SSOP (Shrink Small Outline Package).
The PIC16C558T-04/SS uses a 14-bit-wide instruction word and 8-bit data path, with a hardware stack and interrupt logic supporting wake-up from SLEEP on pin change. Code protection is enabled via EPROM fuse bits. Compared with Flash-based PIC16F parts, this OTP MCU is intended for mature, high-volume programs where field firmware updates are not required.
Typical applications include appliance control, sensor signal conditioning, low-speed serial control loops, hobby and educational projects, LED driving, and replacement of discrete logic in fixed-function control boards. The 13 I/O pins can source/sink up to 25 mA per pin, sufficient to drive small relays, solenoids, and LED arrays directly.
When designing with this part, ensure your programming flow includes EPROM fuse configuration because code protection cannot be changed once blown. For new designs, evaluate Flash-based PIC16F equivalents first; the OTP variant is most cost-effective for locked, high-volume code.
This page synthesizes distributor pricing, drop-in alternatives, and design notes that go beyond the bare datasheet content to help engineers select, source, and qualify the PIC16C558T-04/SS with confidence.
Bộ thay thế dễ dàng lắp đặt cho PIC16C558T-04/SS — 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-04/SS (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Type, Program Memory Size, RAM Size, RoHS Status.
PIC16C558-04/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C558T-04I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C558T-20/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C558-20I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C554T-04/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C558T-04/SS Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Program Memory Type | OTP (EPROM-based) |
| Program Memory Size | 3.5 KB (2K × 14) |
| RAM | 128 bytes |
| Maximum CPU Frequency | 4 MHz |
| Instruction Cycle Time | 200 ns |
| Instruction Set Size | 35 single-word instructions |
| Data Path Width | 8 bits |
| Instruction Word Width | 14 bits |
| I/O Pins | 13 |
| Điện áp cung cấp | 3.0 V to 6.25 V |
| Hộp | 20-SSOP (5.30 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | 0 °C to +70 °C (commercial) |
| Timed Timer | 1 × 8-bit, 1 × Watchdog (WDT) |
| Special Features | Power-on Reset, SLEEP mode, code protection |
| Trạng thái RoHS | See compliance_info |
Cấu hình chân PIC16C558T-04/SS
| Chân 1 | RA2 — Bidirectional I/O, bit 2 of PORTA |
| Chân 2 | RA3 — Bidirectional I/O, bit 3 of PORTA |
| Chân 3 | T0CKI/RA4 — Timer0 clock input / PORTA bit 4 |
| Chân 4 | MCLR/VPP — Master Clear (reset) / Programming voltage input |
| Chân 5 | VSS — Ground reference |
| Chân 6 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 7 | OSC2/CLKOUT — Oscillator output / clock output (Fosc/4) |
| Chân 8 | RB0/INT — Bidirectional I/O / external interrupt |
| Chân 9 | RB1 — Bidirectional I/O, bit 1 of PORTB |
| Chân 10 | RB2 — Bidirectional I/O, bit 2 of PORTB |
| Chân 11 | RB3 — Bidirectional I/O, bit 3 of PORTB |
| Chân 12 | RB4 — Bidirectional I/O, bit 4 of PORTB |
| Chân 13 | RB5 — Bidirectional I/O, bit 5 of PORTB |
| Chân 14 | RB6 — Bidirectional I/O, bit 6 of PORTB |
| Chân 15 | RB7 — Bidirectional I/O, bit 7 of PORTB |
| Chân 16 | VDD — Positive supply voltage |
| Chân 17 | RC0 — Bidirectional I/O, bit 0 of PORTC |
| Chân 18 | RC1 — Bidirectional I/O, bit 1 of PORTC |
| Chân 19 | RC2 — Bidirectional I/O, bit 2 of PORTC |
| Chân 20 | RC3 — Bidirectional I/O, bit 3 of PORTC |
Ứng dụng tiêu biểu
PIC16C558T-04/SS phù hợp cho 6 Áp dụngs: Appliance Control Boards, Sensor Signal Conditioning and Threshold Detection, LED Display and Indicator Drivers, Replacement of Discrete Logic in Fixed Control Boards, Hobby, Educational, and Training Projects, Low-Speed Serial Protocol Bridges.
Appliance Control Boards
The PIC16C558T-04/SS fits appliance control boards because its 13 I/O pins each sink 25 mA, enough to drive relays, triacs, and indicator LEDs directly without external drivers. The 3.5 KB OTP memory holds fixed control firmware for washing machines, microwave ovens, and air-conditioner control panels. Its 200 ns deterministic instruction cycle ensures reliable timing for motor control loops and safety interlocks. Operating from 3.0 V to 6.25 V lets the design share the unregulated supply rail common in white goods.
Được đề xuất
Sensor Signal Conditioning and Threshold Detection
The PIC16C558T-04/SS is well-suited to sensor threshold detection because its 8-bit ADC-free architecture lets the digital I/O pins sample comparators or Schmitt-trigger inputs at high speed. The 35-instruction RISC core handles 1-step threshold comparisons and on/off hysteresis control in under 1 µs. The 4 MHz clock and 200 ns instruction cycle enable 10 kHz sample rates on multiple sensor channels, suitable for industrial limit-switch multiplexing and debouncing.
Được đề xuất
LED Display and Indicator Drivers
The PIC16C558T-04/SS drives LED matrix and bar-graph displays directly through its 25 mA-per-pin I/O, controlling up to 13 high-brightness LEDs or a 7-segment multiplexed display without external transistors. The 4 MHz clock and deterministic 200 ns instruction timing allow 8-digit multiplex refresh at >100 Hz, eliminating visible flicker. Its 3.0 V to 6.25 V supply accepts battery and rectified mains-derived rails equally.
Được đề xuất
Replacement of Discrete Logic in Fixed Control Boards
The PIC16C558T-04/SS replaces dozens of 74xx logic gates in fixed-function industrial controllers by consolidating state machines, counters, and timing logic into one chip. The 3.5 KB OTP program memory typically holds 1,500 to 2,500 equivalent gate-level logic operations. Its 35-instruction RISC core compiles easily from C or assembly, dramatically reducing PCB area and BOM cost while improving field reliability by removing solder joints.
Được đề xuất
Hobby, Educational, and Training Projects
The PIC16C558T-04/SS remains a popular teaching platform because its PIC16C5xx instruction set is the simplest of any 8-bit MCU, with only 35 instructions and orthogonal addressing, making assembly programming a one-day learn. The 20-SSOP package can be adapted to breadboards via SSOP-to-DIP adapter boards. Educators value its deterministic interrupt behavior and absence of peripheral complexity, ideal for teaching bare-metal embedded fundamentals.
Được đề xuất
Low-Speed Serial Protocol Bridges
The PIC16C558T-04/SS implements UART, SPI master, or I2C master bit-banged bridges in cost-sensitive bridging applications where dedicated protocol ICs would be uneconomical. Its 4 MHz clock and 200 ns instruction cycle deliver bit periods down to 10 µs for UART up to 9600 baud, sufficient for sensor telemetry and legacy RS-232 ports. The 13 I/O pins permit simultaneous master and slave channels with no external logic.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C558T-04/SS — 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 | PIC16C558-04/SS | PIC16C558T-04I/SS | PIC16C558T-20/SS | PIC16C558-20I/SO | PIC16C554T-04/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - 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 OTP (-50%) |
| Max CPU Frequency | 4 MHz | 4 MHz | 4 MHz | 20 MHz (5x faster) | 20 MHz (5x faster) | 4 MHz |
| Operating Temperature | 0 °C to +70 °C (commercial) | 0 °C to +70 °C | -40 °C to +85 °C (industrial) | 0 °C to +70 °C | -40 °C to +85 °C | 0 °C to +70 °C |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 12 (-1) |
| 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 | 3.0 V to 6.25 V |
| Delivery Form | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tube | Tape & Reel |
Bảo phân biệt quan trọng
- Highest OTP density in PIC16C5xx 20-SSOP family (vsPIC16C554T-04/SS)
- Industrial temperature variant available (vsPIC16C558-04/SS)
- Tape-and-reel packaging for high-volume SMT lines (vsPIC16C558-04/SS)
Ghi chú thiết kế
The PIC16C558T-04/SS requires a stable VDD within 3.0 V to 6.25 V; brown-out below 3.0 V triggers a power-on reset but may corrupt EEPROM-emulated data in software. Add a 100 nF decoupling capacitor within 5 mm of VDD (pin 16) and a 10 µF bulk capacitor at the board supply input. For battery operation, use a 3.3 V LDO like MCP1700 to maximize battery life. Estimated: with 13 I/O sourcing 10 mA average, total supply current ~25 mA typical, dominated by I/O load.
OTP memory can be programmed once; once the code protection fuse is blown, it cannot be reversed. Always verify firmware in OTP-emulating parts (PIC16C558-04/SO with windowed package) before committing to OTP tape-and-reel volume. The 'T' suffix is tape-and-reel only, NOT speed grade; the speed is encoded in the '04' or '20' suffix. Confusing 'T' for a temperature range is a common procurement error.
Route the OSC1/OSC2 traces short and symmetric, with ground guard traces if high-speed noise is a concern. Place the MCLR/VPP pull-up (typically 10 kΩ) within 10 mm of pin 4 to ensure reliable reset; do not leave MCLR floating. Keep analog I/O traces away from clock traces if any pins are used as comparators. Estimated: SSOP-20 thermal resistance is ~95 °C/W; for normal 25 mA loads no heatsink is needed.
Thông tin tuân thủ
RoHS and lead-free compliant per Microchip product documentation; not AEC-Q100 qualified (industrial-grade -I variants exist for extended temperature).