PIC16C54AT-20E/SO - 8-Bit 20MHz OTP MCU, 768B | Microchip
MPN: PIC16C54AT-20E/SO ✓ Hoạt độngPIC16C54AT-20E/SO Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral I/O on a single die. The PIC16C5x family is the foundational baseline PIC architecture, with subsequent generations adding more memory, peripherals, and flash memory. OTP microcontrollers sit in the broader hierarchy of microcontroller -> embedded controller -> semiconductor device; OTP variants are programmed once with custom firmware and cannot be erased, making them ideal for high-volume mature products where unit cost dominates.
Key features of the PIC16C54AT-20E/SO include a 12-bit instruction word, 33 single-word instruction set, 2-level hardware stack, 8-bit timer/counter (TMR0) with an 8-bit prescaler, and a watchdog timer (WDT) for reliable operation in industrial environments. The device operates from 4.5V to 5.5V and supports commercial temperature range. Power-on Reset (POR), Device Reset Timer (DRT), and an on-chip oscillator with selectable RC/HS/XT/LP modes reduce external component count.
Architecturally, the PIC16C5x uses a Harvard-style separate code/data path with a fixed 12-bit instruction width, enabling deterministic single-cycle instruction execution except for program branches. The "20" speed suffix denotes a 20 MHz oscillator / 5 MHz instruction cycle (4:1 clock-to-instruction divider), while "E" indicates the Extended temperature variant and "T" denotes Tape & Reel packaging.
Typical applications include simple logic replacement, low-cost consumer appliances, sensor conditioning front-ends, LED sequencing controllers, and battery chargers. The 18-SOIC package is a JEDEC-standard small-outline footprint, compatible with hand-soldering and standard SMT reflow lines.
When designing with this device, note that the PIC16C5x family does not support interrupts - all event handling is polled. Program memory is OTP, so firmware must be fully validated before programming. Use MPLAB X IDE with the MPASM assembler or XC8 compiler for firmware development.
This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not found in the standalone manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16C54AT-20E/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 PIC16C54AT-20E/SO (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Type, Core Architecture, Operating Temperature Range, Program Memory Size.
PIC16C54A-20/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54A-20I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54A-20E/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54C-20E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F54-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C54AT-20E/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16C5x 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 768 B (512 x 12 words) |
| RAM Size | 25 B |
| Tần số xung maksimum | 20 MHz |
| Instruction Cycle | 200 ns (4:1 clock divider) |
| Instruction Set Size | 33 single-word instructions |
| I/O Pins | 12 |
| Timers | 1 x 8-bit (TMR0) with 8-bit prescaler |
| Watchdog Timer (WDT) | Yes (on-chip, software-enabled) |
| Hardware Stack | 2 levels |
| Điện áp cung cấp | 4.5 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40 C to +125 C (Extended, "E") |
| Hộp | 18-SOIC (0.295", 7.50 mm width) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (unlimited) |
| Trạng thái RoHS | Compliant |
| Lead-Free / Halogen-Free | Lead-free per Microchip product page |
| Số chân | 18 |
| On-Chip Oscillator Modes | RC, HS, XT, LP |
Cấu hình chân PIC16C54AT-20E/SO
| Chân 1 | RA2 — Port A bit 2 (bidirectional digital I/O) |
| Chân 2 | RA3 — Port A bit 3 (bidirectional digital I/O) |
| Chân 3 | T0CKI/RA4 — Timer 0 external clock input / Port A bit 4 |
| Chân 4 | MCLR/VPP — Master Clear (active-low reset) / ICSP programming voltage |
| Chân 5 | VSS — Ground reference (0 V) |
| Chân 6 | RB0/INT — Port B bit 0 (external interrupt - note: PIC16C5x family does not support interrupts) |
| Chân 7 | RB1 — Port B bit 1 (bidirectional digital I/O) |
| Chân 8 | RB2 — Port B bit 2 (bidirectional digital I/O) |
| Chân 9 | RB3 — Port B bit 3 (bidirectional digital I/O) |
| Chân 10 | RB4 — Port B bit 4 (bidirectional digital I/O) |
| Chân 11 | RB5 — Port B bit 5 (bidirectional digital I/O) |
| Chân 12 | RB6 — Port B bit 6 (bidirectional digital I/O / ICSP clock) |
| Chân 13 | RB7 — Port B bit 7 (bidirectional digital I/O / ICSP data) |
| Chân 14 | VDD — Positive supply voltage (4.5 V to 5.5 V) |
| Chân 15 | OSC2/CLKOUT — Oscillator output / clock output (Fosc/4) |
| Chân 16 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 17 | RA0 — Port A bit 0 (bidirectional digital I/O) |
| Chân 18 | RA1 — Port A bit 1 (bidirectional digital I/O) |
Ứng dụng tiêu biểu
PIC16C54AT-20E/SO phù hợp cho 6 Áp dụngs: Logic Replacement with Embedded Control, Consumer Appliance Control (Microwave, Washing Machine, Fan), LED Sequencing and Lighting Controllers, Battery Charger State Machine Controllers, Sensor Conditioning and Alarm Front-Ends, Remote Control and IR Toy Transmitters.
Logic Replacement with Embedded Control
The PIC16C54AT-20E/SO is ideal for replacing discrete logic ICs (74-series gates) with a programmable microcontroller, saving PCB area while adding product differentiation. With 768 bytes of OTP for custom logic and 12 I/O pins, designers can implement state machines, timing chains, and combinational logic in firmware rather than discrete gates. The 20 MHz / 200 ns instruction cycle provides deterministic response times for real-time control. Power consumption is sub-10 mA active at 5V, and the 18-SOIC footprint drops directly onto a 7400-series pad layout with minor wiring adjustments.
Được đề xuất
Consumer Appliance Control (Microwave, Washing Machine, Fan)
The PIC16C54AT-20E/SO fits low-to-mid-end consumer appliance controllers where the BOM cost dominates and firmware is fixed at production. Its 768-byte OTP stores pre-validated motor timing sequences, button debounce logic, and LED indicators; 25 bytes of RAM handles current state without external SRAM. The Extended -40C to +125C temperature range covers under-hood and inside-appliance environments. The 18-SOIC JEDEC footprint is compatible with high-volume SMT lines; programming is done at contract manufacturer before wave-solder attach.
Được đề xuất
LED Sequencing and Lighting Controllers
The PIC16C54AT-20E/SO drives multi-channel LED chase, fade, and pattern controllers in decorative lighting, signage, and automotive interior strips. Its 12 I/O pins can directly drive 12 LEDs via current-limit resistors or interface to high-side LED drivers like the TLC59108; the TMR0 8-bit timer with prescaler generates millisecond-accurate PWM in firmware. The 20 MHz instruction rate supports smooth fading curves up to 256 brightness steps per channel. OTP memory ensures firmware immutability - critical for safety-certified lighting products.
Được đề xuất
Battery Charger State Machine Controllers
Low-end lead-acid or NiMH battery chargers use the PIC16C54AT-20E/SO to implement charge-profile state machines (bulk / absorption / float) without the cost of a full analog controller. The 768-byte OTP stores voltage thresholds, timer durations, and fault-recovery logic; the 12 I/O pins monitor cell voltage via resistor dividers and drive relay / MOSFET gates. The 20 MHz cycle time supports rapid ADC-free comparator-based charge termination. Extended temperature range supports under-the-hood automotive and outdoor solar installations.
Được đề xuất
Sensor Conditioning and Alarm Front-Ends
The PIC16C54AT-20E/SO acts as a low-cost sensor front-end in smoke detectors, water-leak sensors, and simple security alarms. It polls a thermistor / reed switch / PIR sensor, debounces the input via firmware, and drives a piezo buzzer or relay. With 25 bytes of RAM and the 2-level stack, the firmware implements latching alarm logic and self-test routines. The Extended temperature grade supports attic and outdoor installations; the OTP memory prevents accidental field re-programming of safety-critical firmware.
Được đề xuất
Remote Control and IR Toy Transmitters
Low-cost IR remote controls and toy RC transmitters benefit from the PIC16C54AT-20E/SO's small footprint, low power, and deterministic timing. The 12 I/O drive an IR LED via a transistor, read a 4x4 button matrix, and generate 38 kHz carrier PWM in firmware at 20 MHz. The 768-byte OTP holds button-to-command lookup tables for TV/DVD/STB protocols. OTP prevents firmware copying in mass-market consumer products; the JEDEC 18-SOIC package is drop-in compatible with industry-standard remote-control PCBs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C54AT-20E/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 | PIC16C54A-20/SO | PIC16C54A-20E/SS | PIC16C54C-20E/SO | PIC16F54-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Program Memory | 768 B OTP | 768 B OTP | 768 B OTP | 1024 B OTP | 768 B Flash |
| RAM Size | 25 B | 25 B | 25 B | 25 B | 25 B |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Memory Type | OTP | OTP | OTP | OTP | Flash |
| Operating Temperature | -40C to +125C (Extended) | 0C to +70C (Commercial) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +85C (Industrial) |
| I/O Pins | 12 | 12 | 12 | 12 | 12 |
| Instruction Set | 33 instructions, 12-bit | 33 instructions, 12-bit | 33 instructions, 12-bit | 33 instructions, 12-bit | 33 instructions, 12-bit |
Bảo phân biệt quan trọng
- Extended temperature grade -40C to +125C in production SOIC (vsPIC16F54-I/SO)
- Same-die drop-in upgrade path to 1024-byte OTP (vsPIC16C54A-20E/SS)
- OTP immutability for safety-certified / regulated products (vsPIC16F54-I/SO)
Ghi chú thiết kế
The PIC16C54A uses One-Time-Programmable (OTP) memory. Verify ALL firmware logic on a Flash-equivalent (PIC16F54-I/SO or PIC16C54A-20E/P with emulator) BEFORE committing to OTP programming. A single firmware bug requires scrapping all programmed parts. Always use Microchip's MPLAB X simulator with the PIC16C54A device selection for full coverage of the 33-instruction set, TMR0 behavior, and the 2-level hardware stack. Also note the PIC16C5x family has NO interrupt controller - all event handling must be polled in firmware, which can trip up engineers migrating from PIC16F or PIC18F devices.
The 18-SOIC (0.295" body width) JEDEC package requires a standard 1.27 mm pitch land pattern. Place a 0.1 uF decoupling capacitor within 5 mm of the VDD pin (pin 14), with a short, wide trace to VSS (pin 5). Use a ground plane on the bottom layer to provide low-impedance return for the OSC1/OSC2 crystal traces (pins 15/16). For HS-mode crystals (>4 MHz), keep crystal traces short (<10 mm) and surround them with a ground guard ring to reduce EMI. The MCLR/VPP pin (pin 4) requires a 10 kohm pull-up to VDD for normal operation; during ICSP programming it sees 13V.
Estimated: at 20 MHz, 5V, and all 12 I/O pins switching at maximum capacitive load, the PIC16C54AT-20E/SO draws approximately 10-15 mA active. With the WDT disabled and TMR0 gated off in sleep, quiescent current drops below 4 uA in sleep mode - well-suited for battery-powered sensor applications. For designs that alternate active/sleep at >1000:1 duty cycles, size the decoupling capacitor at 1 uF (not 0.1 uF) to handle inrush during wake-up. The 4.5V minimum supply is required for HS-mode oscillator operation; HS mode at 20 MHz requires a 20 MHz fundamental-mode crystal with 15-33 pF load capacitors.
Thông tin tuân thủ
RoHS-compliant and lead-free per Microchip product page (DigiKey listing and TrustCompo green-component listing). AEC-Q100 qualification is not applicable for baseline PIC16C5x - choose PIC16C54C automotive variants if needed. Halogen-free status was not explicitly stated in the verified data and is marked unknown.