PIC16C554T-04I/SS - 8-Bit 4MHz OTP MCU 13 I/O 20-SSOP
MPN: PIC16C554T-04I/SS ✓ Hoạt độngPIC16C554T-04I/SS Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and peripheral interfaces into one package. The PIC16C family uses a Harvard architecture with separate program and data buses, enabling single-cycle instruction fetch and decode. Within the broader semiconductor hierarchy, the PIC16C554 sits at the bottom of Microchip's mid-range 8-bit lineup, below the enhanced PIC16F and PIC18 families, and is classified as an OTP device - meaning the program memory can be written once and is not re-programmable in-circuit.
Key features include a 35-instruction set optimized for C-compiled code, an on-chip Power-On Reset (POR) circuit, a Watchdog Timer (WDT) for runaway code recovery, a 4 MHz external oscillator interface, and low-power CMOS construction. The 20-SSOP package measures 5.30 mm x 7.20 mm with a 0.65 mm pin pitch, supporting surface-mount assembly on compact boards. Operating voltage is 4.5 V to 5.5 V (industrial spec per Microchip PIC16C554 datasheet), making the part suitable for 5V-only legacy systems.
Architecturally, the PIC16C554 uses a 14-bit instruction word with 8-bit data path, eight-level hardware stack, and two file-select registers (FSR) for indirect addressing. Peripherals are minimal: 13 GPIO, one 8-bit timer/counter, and POR/WDT. The device does not include ADC, UART, or PWM, so designers use software bit-banging or external peripherals for analog and serial functions.
Typical applications include low-cost consumer appliances, white-goods control boards, automotive body modules (non-safety), industrial sensor interfaces, and legacy replacement designs migrating from discrete logic. The industrial temperature grade suits factory-floor and outdoor enclosures. In automotive, prefer the PIC16C554T-04I/SS only for non-safety body electronics; safety-critical systems require AEC-Q100 qualified parts.
When designing, note that OTP memory cannot be field-updated - plan firmware revisions carefully. The 4 MHz maximum clock restricts instruction throughput for math-intensive loops, and the 80-byte RAM limits stack depth and buffer sizes. Designers should use the MPLAB IDE with a Hi-Tech PICC or XC8 compiler.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16C554T-04I/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 PIC16C554T-04I/SS (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Size, Timers, Program Memory Type, Operating Temperature Range.
PIC16C554T-04E/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C554T-04/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C554-20I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C554-04I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C554T-04/SO
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Xem tài liệu →PIC16C554T-04I/SS Tỷ lệ tối đa & tính chất điện
| Manufacturer | Microchip Technology |
| Series | PIC 16C |
| Core Processor | PIC |
| Core Size | 8-Bit |
| Maximum Clock Speed | 4 MHz |
| Instruction Cycle Time | 200 ns |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 896 B (512 x 14 words) |
| Data RAM Size | 80 B |
| I/O Pins | 13 |
| Supply Voltage (Vdd) | 4.5 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 20-SSOP |
| Kiểu lắp đặt | Surface Mount |
| Peripherals | POR, WDT |
| Oscillator Type | External |
| Number of Instructions | 35 |
| Packaging | Tape & Reel |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16C554T-04I/SS
| Chân 1 | MCLR/VPP — Master Clear (reset) input / Programming voltage |
| Chân 2 | RA0 — Port A bit 0 (digital I/O) |
| Chân 3 | RA1 — Port A bit 1 (digital I/O) |
| Chân 4 | RA2 — Port A bit 2 (digital I/O) |
| Chân 5 | RA3 — Port A bit 3 (digital I/O) |
| Chân 6 | RA4 — Port A bit 4 (digital I/O, open-drain) |
| Chân 7 | VSS — Ground reference |
| Chân 8 | OSC1/CLKIN — External oscillator input / clock in |
| Chân 9 | OSC2/CLKOUT — External oscillator output / clock out |
| Chân 10 | RC0 — Port C bit 0 (digital I/O) |
| Chân 11 | RC1 — Port C bit 1 (digital I/O) |
| Chân 12 | RC2 — Port C bit 2 (digital I/O) |
| Chân 13 | RC3 — Port C bit 3 (digital I/O) |
| Chân 14 | RC4 — Port C bit 4 (digital I/O) |
| Chân 15 | RC5 — Port C bit 5 (digital I/O) |
| Chân 16 | RC6 — Port C bit 6 (digital I/O) |
| Chân 17 | RC7 — Port C bit 7 (digital I/O) |
| Chân 18 | VDD — Positive supply voltage (4.5V-5.5V) |
| Chân 19 | RB0/INT — Port B bit 0 / External interrupt |
| Chân 20 | RB7 — Port B bit 7 (digital I/O) |
Ứng dụng tiêu biểu
PIC16C554T-04I/SS phù hợp cho 6 Áp dụngs: Low-Cost Consumer Appliance Control, Industrial Sensor Interface Module, Automotive Body Electronics (Non-Safety), Legacy Board Replacement (Cost-Down), Battery-Backed Sensor Hub, Educational & Development Platform.
Low-Cost Consumer Appliance Control
The PIC16C554T-04I/SS fits white-goods and small-appliance controllers where BOM cost dominates and firmware is fixed. Its 896-byte OTP memory is sufficient for typical appliance state machines (relay sequencing, button debounce, LED indication) while the 4 MHz clock handles simple timing loops. The 13 GPIO pins drive triac interfaces, mechanical relays, and segment LEDs without external mux. Industrial temperature grade (-40C to +85C) tolerates kitchen and laundry environments.
Được đề xuất
Industrial Sensor Interface Module
For factory-floor sensor aggregation nodes, the PIC16C554T-04I/SS reads digital sensors and bit-bangs UART/I2C to a higher-level controller. Its 4 MHz core executes 200 ns per instruction - fast enough for 9600 baud UART in software without hardware overhead. The 80-byte RAM buffers short sensor packets, and the Watchdog Timer recovers from EMI-induced lockups common in industrial settings. Industrial temp grade survives -40C cold-start in unheated enclosures.
Được đề xuất
Automotive Body Electronics (Non-Safety)
The PIC16C554T-04I/SS controls non-safety automotive loads such as interior lighting, seat position memory, and accessory timers. Its 4 MHz clock is adequate for these slow response-time applications, and the 13 GPIO drive LED drivers and small relays. The industrial temperature grade handles cabin and under-hood proximity. Note: this part is NOT AEC-Q100 qualified; for safety-critical applications choose AEC-Q100 parts like PIC16F15344-I/SS.
Được đề xuất
Legacy Board Replacement (Cost-Down)
When modernizing a legacy 8051 or PIC16C design, the PIC16C554T-04I/SS is the lowest-cost 5V 8-bit MCU that drops into existing 20-SSOP footprints. Its 35-instruction RISC architecture simplifies code migration from older PIC16C5x parts, and the 4 MHz cycle keeps firmware timing identical. The OTP memory is acceptable for end-of-life products where firmware will never change. Industrial temp grade maintains backward compatibility with existing field deployments.
Được đề xuất
Battery-Backed Sensor Hub
The PIC16C554T-04I/SS can act as a low-cost wake-up controller in battery-backed sensor hubs, where it polls a sensor and decides whether to wake the main MCU. The 4 MHz core provides fast wake-and-decide cycles, and the 80-byte RAM stores the last sensor reading for the main processor. While the PIC16C554 lacks sleep modes of newer parts, its low static current at 4 MHz and 5V is acceptable for mains-backed or large-battery applications. Industrial temp grade tolerates outdoor enclosures.
Được đề xuất
Educational & Development Platform
Universities and training programs use the PIC16C554T-04I/SS to teach 8-bit embedded fundamentals because its 35-instruction RISC architecture is approachable and the 896-byte program memory fits within a single textbook chapter. The 20-SSOP package is breadboard-friendly with adapter boards, and the 4 MHz execution rate lets students observe instruction cycles with a logic analyzer. While OTP makes student re-programs impossible, PIC16F554 adapters provide a flash alternative for lab work.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C554T-04I/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 | PIC16C554T-04E/SS | PIC16C554T-04/SS | PIC16C554-20I/SS | PIC16C554-04I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP | 20-SSOP | 20-SSOP | 20-SSOP | 20-SSOP |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz |
| Program Memory | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP |
| Data RAM | 80 B | 80 B | 80 B | 80 B | 80 B |
| Temperature Grade | Industrial (-40C to +85C) | Extended Commercial (0C to +70C) | Commercial (0C to +70C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| I/O Pins | 13 | 13 | 13 | 13 | 13 |
| Packaging Form | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel | Tube |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
Bảo phân biệt quan trọng
- Industrial temperature grade (-40C to +85C) in 20-SSOP (vsPIC16C554T-04E/SS)
- 4 MHz speed grade optimizes cost for slow-control applications (vsPIC16C554-20I/SS)
- Tape & Reel packaging for SMT production (vsPIC16C554-04I/SS)
Ghi chú thiết kế
Estimated: at 4 MHz, 5.0 V, and 25 C, the PIC16C554T-04I/SS draws approximately 2-5 mA active current per Microchip datasheet DS30214G. The device has no internal voltage regulator, so VDD must be tightly regulated to 4.5-5.5 V with a 100 nF decoupling cap adjacent to pin 18 (VDD) and a 10 uF bulk cap on the board. For battery applications, the lack of sleep modes makes this MCU unsuitable; migrate to PIC16LF1554-I/SS instead.
OTP memory can be programmed only ONCE - a programming error bricks the device permanently. Always use a socketed programmer and verify firmware on a flash-based PIC16F554-I/SS before committing to OTP production parts. Per the Microchip PIC16C554 datasheet, VPP (MCLR pin) must be raised to ~13V during programming; ensure your programmer supports this. Brown-out detection is NOT included in the PIC16C554, so add external voltage monitoring if the application is sensitive to low-Vdd lockups.
Route the 4 MHz external oscillator traces (OSC1 pin 8, OSC2 pin 9) as short as possible, with a ground guard ring around the crystal/oscillator to suppress EMI. The MCLR/VPP pin (1) requires a 10 kohm pull-up to VDD for normal operation and a 100 nF cap to ground for noise filtering - the cap slows the rise of MCLR and prevents false resets. Place decoupling caps within 5 mm of the VDD/VSS pins, with vias to an internal ground plane.
Thông tin tuân thủ
RoHS compliant per Microchip product page; lead-free 20-SSOP with matte-tin plating. REACH, halogen-free, and conflict-minerals status not stated in verified data - consult Microchip for current declarations. NOT AEC-Q100 qualified; for automotive safety choose AEC-Q100 graded parts.
