PIC16C554-04I/SO - 8-bit OTP MCU 896B 4MHz | Microchip
MPN： PIC16C554-04I/SO ✓ 啟用中PIC16C554-04I/SO 概覽
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program and data memory, and programmable I/O peripherals on a single die. Within the PIC16C series, mid-range PIC MCUs follow a RISC architecture with a small fixed instruction set (here 35 single-word instructions), making firmware easy to develop, debug, and verify. The PIC16C554 sits in the low-cost OTP tier of this hierarchy: PIC16C554 -> PIC16C mid-range MCU -> 8-bit PIC microcontroller -> microcontroller (MCU) -> embedded semiconductor IC.
Key features include a 200 ns instruction cycle (5 MIPS at 20 MHz max), on-chip 8-bit timer/counter (TMR0) with 8-bit prescaler, direct/indirect/relative addressing modes for both data and instructions, and a watchdog timer for unattended operation. Power-fail reset and power-on reset are integrated, alongside the configurable I/O ports. The brown-out detect and internal oscillator options present on later PIC16 families are NOT available on this OTP member - designers must rely on the external clock and supply supervision if needed.
Typical applications include low-cost appliance controllers, automotive subsystems (non-safety, body-electronics tier), industrial sensor front-ends, and remote-control / HVAC logic modules. The 13 usable I/O pins accommodate matrix keypads, LED drivers, and serial I/O bit-banged protocols. The PIC16C554 is also used as a glue-replacement for legacy 8051 designs where minimum external parts and deterministic interrupt-free logic are preferred.
When designing with this part, ensure VDD stays within the 3.0-5.5 V range and provide a stable clock source on OSC1/CLKIN. OTP memory requires a programming step after assembly; designers should plan for socketing or in-system programming to avoid scrapping parts. The PIC16C554 family is mature and is now serviced through Microchip's extended-life OTP roadmap, so lead times should be confirmed before high-volume commitments. This page synthesizes distributor pricing, drop-in alternatives from the same PIC16C family, and practical design notes not consolidated in the manufacturer datasheet.
直接替換替代品，適用於 PIC16C554-04I/SO — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16C554-04I/SO （相同外形與佔位） — 差異在於 Package, Program Memory Size, Program Memory Type, Timers, Operating Temperature Range.
PIC16C554-04/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C554-04E/SO
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC16C554T-04I/SO
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F54-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C554-20I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C554-04I/SO 最大額定值與電氣特性
| Family | PIC16C series, mid-range 8-bit |
| Core Architecture | PIC RISC (Harvard) |
| Instruction Word | 12-bit |
| Data Path | 8-bit |
| Instruction Set Size | 35 single-word instructions |
| Instruction Cycle Time | 200 ns (5 MIPS at 20 MHz) |
| 最大時脈頻率 | 4 MHz (04 suffix = 4 MHz) |
| Program Memory | 896 bytes (512 x 14) OTP EPROM |
| RAM | 80 bytes |
| I/O Pins | 13 |
| Timers | 1 x 8-bit (TMR0) with 8-bit prescaler |
| Special Function Registers | 7 or 8 hardware registers |
| Stack | 2-level hardware |
| Addressing Modes | Direct, Indirect, Relative |
| 供應電壓 | 3.0 V to 5.5 V |
| 工作溫度 | -40C to +85C (industrial, I suffix) |
| 封裝 | 18-pin SOIC (SO), 7.50 mm body width |
| 安裝類型 | Surface Mount |
| Watchdog Timer | Yes (on-chip WDT) |
| Power-On Reset | Yes |
| Brown-Out Detect | No (not present on this OTP variant) |
| Internal Oscillator | No (external clock required) |
| ADC | None |
| UART / I2C / SPI | None (bit-banged via CCP / GPIO) |
PIC16C554-04I/SO 腳位配置
| 腳位 1 | RA2 — Bidirectional I/O, bit 2 of PORTA |
| 腳位 2 | RA3 — Bidirectional I/O, bit 3 of PORTA |
| 腳位 3 | T0CKI/RA4 — TMR0 clock input / PORTA bit 4 (open-drain) |
| 腳位 4 | /MCLR — Master Clear (reset) input, active low |
| 腳位 5 | VSS — Ground reference |
| 腳位 6 | RB0/INT — PORTB bit 0 / external interrupt input |
| 腳位 7 | RB1 — Bidirectional I/O, PORTB bit 1 |
| 腳位 8 | RB2 — Bidirectional I/O, PORTB bit 2 |
| 腳位 9 | RB3 — Bidirectional I/O, PORTB bit 3 |
| 腳位 10 | RB4 — Bidirectional I/O, PORTB bit 4 |
| 腳位 11 | RB5 — Bidirectional I/O, PORTB bit 5 |
| 腳位 12 | RB6 — Bidirectional I/O, PORTB bit 6 / ICSP clock |
| 腳位 13 | RB7 — Bidirectional I/O, PORTB bit 7 / ICSP data |
| 腳位 14 | VDD — Positive supply, 3.0 V to 5.5 V |
| 腳位 15 | OSC2/CLKOUT — Oscillator output / clock out (crystal mode) |
| 腳位 16 | OSC1/CLKIN — Oscillator input / external clock in |
| 腳位 17 | RA0 — Bidirectional I/O, PORTA bit 0 |
| 腳位 18 | RA1 — Bidirectional I/O, PORTA bit 1 |
典型應用
PIC16C554-04I/SO 適用於 6 應用s: Low-Cost Appliance Control, Automotive Body Electronics (Non-Safety), Industrial Sensor Front-End, Remote Control and IR Receiver Logic, Legacy 8051 Replacement, Glue Logic and Custom Peripherals.
Low-Cost Appliance Control
The PIC16C554-04I/SO fits appliance controllers (washing-machine front panels, microwave keypads, dishwasher user interfaces) where 13 I/O pins are sufficient for matrix keypads, LED indicators, and a triac-zero-cross drive. Its 80-byte RAM is adequate for state-machine firmware controlling wash cycles or cooking profiles, and the 200 ns instruction cycle (5 MIPS at 20 MHz) comfortably handles debounce, timing, and display multiplexing. The SOIC-18 footprint reflows cleanly on automated lines, and the OTP memory is the lowest cost per unit for high-volume appliance production runs above 100 kpcs/yr.
推薦
Automotive Body Electronics (Non-Safety)
For non-safety body-electronics modules such as interior lighting dimmers, mirror adjusters, seat-position switches, or wiper-interval timers, the PIC16C554-04I/SO offers the 13 GPIO and 80-byte RAM needed for state logic, plus the industrial -40C to +85C temperature range required under-the-dash. Designers must add a discrete voltage regulator and reverse-battery protection on the supply rail because the part lacks internal brown-out detect on this OTP variant. Note that this part is NOT AEC-Q100 qualified, so it should be deployed only where OEM accepts industrial-grade silicon or where a downstream AEC-Q100 part is substituted.
推薦
Industrial Sensor Front-End
The PIC16C554-04I/SO works well as a sensor-signal conditioning front-end for industrial 4-20 mA loops, simple RTD cold-junction compensation, or low-frequency vibration counters where analog pre-amplification, thresholding, and digital output are required. Its TMR0 timer with 8-bit prescaler provides accurate event counting for pulse-train sensors, while the 35-instruction RISC core fits state-machine firmware into 896 bytes of OTP. The industrial temperature grade tolerates factory-floor ambients up to +85C without additional thermal management.
推薦
Remote Control and IR Receiver Logic
For IR remote-control receivers, RF remote decoder modules, and simple HVAC handheld controllers, the PIC16C554-04I/SO provides enough program memory to store NEC, RC5, or proprietary pulse-train decoding tables and 80 bytes of RAM for the most recent command buffer. The 13 GPIO pins are sufficient for matrix keypads and status LEDs, and the 200 ns instruction cycle handles bit-banged UART for diagnostics. Battery-powered remotes benefit from the low standby current when the device is clocked from a 32.768 kHz crystal oscillator.
推薦
Legacy 8051 Replacement
The PIC16C554-04I/SO is a popular pin-comparable drop-in for legacy 8051 designs in retrofit and OEM service applications, offering simpler firmware development (35 single-word instructions vs 8051's 256-opcode complexity) and lower quiescent current. The SOIC-18 footprint accommodates adapter PCBs that re-route 8051 port pins to the PIC's PORTA/PORTB mapping. For 8051 designs needing 2 or more timers, the PIC16C554's single TMR0 may be limiting, and the PIC16F57-I/SO flash variant with two timers is a better drop-in.
推薦
Glue Logic and Custom Peripherals
When a design needs custom timing, sequencing, or pattern generation that fixed-function logic ICs cannot economically provide, the PIC16C554-04I/SO implements state machines in firmware with 35 single-word instructions and 200 ns cycle time. Typical uses include staircase generators for LED dimmers, programmable pulse-train sources for stepper-motor indexers, watchdog supervisors with custom timing windows, and PWM-like waveform synthesizers via tight GPIO toggle loops. The OTP memory keeps per-unit cost at the absolute minimum for high-volume deployment.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C554-04I/SO — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16C554-04/SO | PIC16C554T-04I/SO | PIC16F54-I/SO | PIC16C554-20I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-18 | SOIC-18 - same | SOIC-18 - same | SOIC-18 - same | SOIC-18 - same |
| Program Memory | 896 B OTP (512 x 14) | 896 B OTP (same) | 896 B OTP (same) | 1 KB Flash | 896 B OTP (same) |
| RAM | 80 B | 80 B | 80 B | 41 B | 80 B |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 20 MHz |
| Temperature Grade | Industrial -40C to +85C | Commercial 0C to +70C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
| Memory Technology | OTP EPROM | OTP EPROM | OTP EPROM | Flash (reprogrammable) | OTP EPROM |
| I/O Pins | 13 | 13 | 13 | 12 | 13 |
| Timers | 1 x 8-bit (TMR0) | 1 x 8-bit | 1 x 8-bit | 1 x 8-bit | 1 x 8-bit |
主要差異化特點
- Industrial -40C to +85C temperature grade in OTP form (對比PIC16C554-04/SO)
- Lowest per-unit cost vs flash replacement (對比PIC16F54-I/SO)
- 5 MIPS deterministic instruction execution (對比PIC16C554-04/P (PDIP))
設計說明
Estimated: at 5 V supply with a 4 MHz clock driving all 13 I/O pins at 50% toggle rate, the PIC16C554-04I/SO core current is roughly 2 mA plus 20 mA I/O sink current per pin (worst case). For designs sourcing high I/O current (LED drive, relay coils), drop VDD to 3.3 V to reduce dissipation, or use a high-efficiency switching pre-regulator. Always decouple VDD (pin 14) to VSS (pin 5) with a 100 nF ceramic placed within 5 mm of the package, plus a bulk 10 uF tantalum at the board's power entry.
Do NOT rely on the PIC16C554-04I/SO to recover from a programming error: OTP memory cannot be erased. Either socket the part in development, or choose the flash variant PIC16F54-I/SO for prototypes and migrate to OTP only after firmware is locked. Also note this part lacks brown-out detect; if the supply can dip near 3 V under load transients, add an external voltage supervisor (e.g., MCP100-300) tied to /MCLR (pin 4) to avoid code-execution errors during brown-out.
Keep the OSC1/OSC2 traces short (under 10 mm) and route them over a continuous ground pour to minimize EMI pickup on the crystal or ceramic resonator. Place the /MCLR pull-up resistor (typically 10 kOhm) within 5 mm of pin 4, and add a 100 nF decoupling cap directly at /MCLR if the application has noisy reset sources. For in-circuit serial programming (ICSP), break out RB6 (clock) and RB7 (data) to a 6-pin header alongside VDD, VSS, and /MCLR.
合規資訊
RoHS/REACH status not explicitly stated in verified distributor listings retrieved 2026-09-16; Microchip's product page and CoC must be checked for the specific date code. AEC-Q100 not applicable - this part is industrial grade only. Conflict-mineral compliance assumed per Microchip standard policy.