PIC16C554T-20/SO - 8-Bit 20MHz OTP MCU 896B | Microchip
MPN: PIC16C554T-20/SO ✓ Hoạt độngPIC16C554T-20/SO Tóm tắt
An 8-bit OTP microcontroller is a single-chip computer built on a Harvard architecture that executes one instruction per cycle from non-volatile program memory and writes volatile data to on-chip RAM; it is intended for high-volume, cost-sensitive, code-stable products where the firmware is finalized before production and does not need in-field updates. Within the broader taxonomy, the PIC16C554 belongs to the PIC16C family of mid-range microcontrollers, which sits between Microchip's baseline PIC10/12/16 and the high-performance PIC18 families.
Key features include 35 single-word instructions, a wide 3V to 5.5V operating range, 13 I/O pins, an 8-bit timer/counter, watchdog timer with on-chip RC oscillator, power-on reset, power-saving sleep mode, and 200 ns instruction cycle. The PIC16C-series architecture uses a RISC instruction set with a single accumulator (W) and a memory-mapped I/O register scheme that simplifies peripheral access.
Typical applications include appliance control, automotive subsystems (sensor conditioning, body electronics), industrial control logic, and remote-control encoders where low cost, deterministic timing, and compact code footprint outweigh the need for in-system reprogrammability. The 18-SOIC package supports standard surface-mount assembly lines and offers an industry-standard land pattern.
When designing with this OTP device, ensure firmware is fully validated before programming because OTP memory cannot be erased or rewritten. For new designs where in-circuit reprogrammability is needed, consider the flash-based PIC16F554 or PIC16F505 family members instead.
This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found in the standalone manufacturer datasheet, helping engineers evaluate sourcing risk and second-source options for the PIC16C554T-20/SO.
Bộ thay thế dễ dàng lắp đặt cho PIC16C554T-20/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 PIC16C554T-20/SO (cùng hình factor và footprint) — khác nhau ở Program Memory Size, Package, Core Architecture, RAM Size, Timers.
PIC16C554T-04/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C554-04/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C554-04E/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C554T-20/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC |
| Family | PIC16C series, mid-range |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 896 B (512 x 14-bit words) |
| RAM | 80 B |
| Tần số xung maksimum | 20 MHz |
| Instruction Execution Time | 200 ns |
| Instruction Set Size | 35 single-word instructions |
| Supply Voltage Range | 3.0 V to 5.5 V |
| I/O Pins | 13 |
| Timers | 1 x 8-bit Timer/Counter |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| Hộp | 18-SOIC (7.50 mm / 0.295 in body width) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | 0C to +70C (commercial) |
| Lead Finish / Terminal Form | Gull Wing |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16C554T-20/SO
| Chân 1 | MCLR/VPP — Master Clear (reset) input / programming voltage input |
| 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/T0CKI — Port A bit 4 / Timer0 clock input (open-drain) |
| Chân 7 | VSS — Ground reference |
| Chân 8 | RB0/INT — Port B bit 0 / external interrupt input |
| Chân 9 | RB1 — Port B bit 1 (digital I/O) |
| Chân 10 | RB2 — Port B bit 2 (digital I/O) |
| Chân 11 | RB3 — Port B bit 3 (digital I/O) |
| Chân 12 | RB4 — Port B bit 4 (digital I/O, interrupt-on-change) |
| Chân 13 | RB5 — Port B bit 5 (digital I/O, interrupt-on-change) |
| Chân 14 | VDD — Positive supply voltage (3.0 V to 5.5 V) |
| Chân 15 | RC0 — Port C bit 0 (digital I/O) |
| Chân 16 | RC1 — Port C bit 1 (digital I/O) |
| Chân 17 | RC2 — Port C bit 2 (digital I/O) |
| Chân 18 | RC3 — Port C bit 3 (digital I/O) |
Ứng dụng tiêu biểu
PIC16C554T-20/SO phù hợp cho 6 Áp dụngs: Appliance Control Board, Automotive Body Electronics, Remote Control Encoder, Industrial Sensor Conditioning, LED Display Driver Logic, Smart Sensor IoT Edge Node.
Appliance Control Board
The PIC16C554T-20/SO is well suited for fixed-function appliance control boards such as washing-machine timers, microwave user interfaces, and rice-cooker state machines. Its 896-byte OTP memory comfortably fits the typical 200-400 instruction control loops used to sequence motors, heaters, and indicator LEDs. The 13 digital I/O pins are enough to drive multiplexed 7-segment displays and read capacitive-touch or membrane keypads without external I/O expanders. Operating from 3.0 V to 5.5 V, the part interfaces directly with 5 V relay drivers and 3.3 V logic-level sensors, while the 20 MHz core delivers 200 ns instruction cycles that are more than sufficient for 10 ms human-perceptible timing loops. The 18-SOIC package accepts standard reflow profiles, making it compatible with high-volume consumer appliance production lines.
Được đề xuất
Automotive Body Electronics
For non-safety automotive subsystems such as interior lighting controllers, seat-position memory, and mirror-adjustment modules, the PIC16C554T-20/SO provides the deterministic 200 ns instruction cycle required to handle multiple switch inputs and PWM outputs in real time. Although this commercial-temperature (-0C to +70C) grade is not suited for under-hood use, it fits comfortably in cabin-mounted body controllers. The 13 I/O pins are sufficient to drive half a dozen LEDs and read rocker switches, while the on-chip watchdog timer with internal RC oscillator protects against code lockup in noisy automotive electrical environments. When the design needs extended temperature operation, the same family offers industrial (-I) and automotive (-E) temperature grades in the same 18-SOIC footprint for direct qualification upgrades.
Được đề xuất
Remote Control Encoder
The PIC16C554T-20/SO fits neatly inside low-cost infrared and 315/433 MHz RF remote-control transmitters for garage-door openers, ceiling fans, and consumer A/V systems. A typical RC-5 or NEC protocol encoder fits in under 200 instructions, leaving ample 896-byte OTP headroom for custom button-mapping tables and security rolling-code seeds. The 20 MHz core generates accurate 38 kHz carrier modulation for IR transmission, while the 8-bit timer/counter handles debounce and frame-timing without software overhead. Sleep mode reduces standby current to a few microamps, allowing months of battery life on two AA cells across the 3.0-5.5 V supply range, which directly matches the battery discharge curve of remote-control applications.
Được đề xuất
Industrial Sensor Conditioning
In industrial control panels, the PIC16C554T-20/SO serves as a dedicated signal-conditioning and digital-filtering front-end for analog sensors such as thermistors, photocells, and load cells. Its 13 I/O pins can be configured with internal weak pull-ups to read multiple open-collector sensor outputs, while the on-chip 8-bit timer/counter provides the timebase for software-implemented low-pass filters and moving averages. The 20 MHz CPU bandwidth is more than enough to oversample a 1 kHz sensor at 10x and still maintain a real-time response. The 18-SOIC package survives standard wave-solder and reflow processes used in industrial control-card assembly.
Được đề xuất
LED Display Driver Logic
The PIC16C554T-20/SO is an excellent companion controller for Charlieplexed or matrix-multiplexed LED signs, scoreboards, and decorative lighting strips. With 13 I/O pins, the part can directly drive an 8x8 LED matrix using a 3-to-8 decoder and three row-driver lines, with row-refresh handled by the on-chip timer interrupt. The 20 MHz CPU bandwidth allows 1 kHz PWM per channel for breathing-effect animations and color-mixing on RGB strips. The OTP memory holds the entire display pattern database plus a small interpreter for serial-command input, simplifying the bill of materials by eliminating an external EEPROM.
Được đề xuất
Smart Sensor IoT Edge Node
For low-data-rate IoT edge nodes such as building-automation sensors, water-leak detectors, and HVAC zone controllers, the PIC16C554T-20/SO offers a deterministic, ultra-low-power alternative to 32-bit microcontrollers. Its sleep-mode current in the microamp range enables years of battery life when waking only on a timer interrupt to take a sensor reading and transmit via UART to a host. The 13 I/O pins support multiple I2C, SPI, or UART peripherals through bit-banging, and the 80-byte RAM is sufficient to buffer one full Modbus-RTU frame. The 18-SOIC package assembles into standard IoT-module form factors.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C554T-20/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 | PIC16C554T-04/SO | PIC16C554-04/SO | PIC16C554-04E/SO | PIC16C554-04I/P | PIC16C554T-04I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC | 18-SOIC | 18-SOIC | 18-SOIC | 18-PDIP | 20-SSOP |
| Core / Family | PIC16C 8-bit | PIC16C 8-bit | PIC16C 8-bit | PIC16C 8-bit | PIC16C 8-bit | PIC16C 8-bit |
| Max Clock Frequency | 20 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP |
| RAM | 80 B | 80 B | 80 B | 80 B | 80 B | 80 B |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C (commercial) | 0C to +70C (commercial) | -40C to +125C (extended) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 13 |
Bảo phân biệt quan trọng
- 20 MHz speed grade for time-critical control (vsPIC16C554T-04/SO)
- Tape-and-reel packaging for high-volume SMT (vsPIC16C554-20/SO (tube))
- Same-family pin compatibility for temperature migration (vsPIC16C554T-20I/SO (industrial grade))
Ghi chú thiết kế
OTP (one-time programmable) memory can only be programmed from 1 to 0; it cannot be erased or rewritten. Per Microchip documentation, this means any firmware bug becomes permanent after programming, so engineers must validate the code thoroughly on a windowed or flash-based equivalent (such as PIC16F554) before committing to PIC16C554T-20/SO production units. JTAG/ICD debugging is also not available on this OTP part, so plan for in-circuit emulation on a sibling flash part during development.
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (pin 14), with a 10 uF bulk capacitor on the same supply rail within 1 cm of the part. Per Microchip PIC16C554 layout guidelines, this combination suppresses VDD transients during I/O switching and prevents POR (power-on reset) misfires. The wide 3.0 V to 5.5 V operating range means the same decoupling network works for both 3.3 V and 5 V rails, simplifying layout reuse.
Keep the MCLR/VPP pin (pin 1) connection short and direct to the reset circuit. Per the PIC16C554 datasheet, a long MCLR trace can pick up noise and trigger spurious resets; if the application uses an RC reset, place the resistor and capacitor within 5 mm of pin 1. For ICSP (in-circuit serial programming), route the MCLR/VPP, RB6, and RB7 signals to a programming header with no series resistors exceeding 100 ohm.
Thông tin tuân thủ
RoHS compliance and lead-free plating per Microchip product page. Commercial temperature grade only; for AEC-Q100 automotive qualification, contact Microchip for the -E automotive-grade PIC16C554 variants.
