PIC16C620-04/SO - 8-Bit 4MHz CMOS MCU, 896B OTP, 13 I/O | Microchip
MPN: PIC16C620-04/SO ✓ Hoạt độngPIC16C620-04/SO Tóm tắt
A PIC microcontroller is a compact microcontroller unit (MCU) built on a Harvard-architecture Reduced Instruction Set Computer (RISC) core that integrates CPU, program memory, data RAM, and peripheral I/O on a single chip. PIC microcontrollers sit within the broader hierarchy of embedded processors -> microcontrollers -> 8-bit MCUs -> PIC16C family, and are widely used as the central controller in industrial, automotive, appliance, and consumer-electronic products. The PIC16C620 specifically belongs to Microchip's mid-range PIC16C5x/PIC16C6x lineage featuring OTP EPROM program memory, suitable for low-volume, cost-sensitive, or development-stage designs. An OTP device is programmed once and cannot be erased, which makes it ideal for fixed-function production units that do not require firmware updates.
Key features of the PIC16C620-04/SO include 80 bytes of data RAM, 13 digital I/O pins, a watchdog timer, an 8-bit timer/counter (TMR0), and a power-on reset (POR) circuit. The device supports a wide operating voltage range, allowing it to operate from low-voltage battery systems as well as standard 5 V rails. Compared to flash-based PIC16F successors, the OTP PIC16C620 offers lower per-unit cost at higher volumes, with no field-upgrade capability.
Typical applications for the PIC16C620-04/SO include low-cost remote control transmitters, small appliance controllers, security-system keypads, sensor-interface modules, and industrial timer modules. Designers transitioning legacy PIC16C620 designs to flash-based replacements typically migrate to PIC16F627A/628A/648A in the same 18-pin SOIC footprint for in-circuit re-programmability.
When designing with this part, remember that OTP memory cannot be re-programmed - any firmware change requires a new device. For prototypes and field-updateable production, consider a flash-based PIC16F6xxA in the same 18-SOIC footprint.
Bộ thay thế dễ dàng lắp đặt cho PIC16C620-04/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 PIC16C620-04/SO (cùng hình factor và footprint) — khác nhau ở Package, Timers, Operating Temperature Range, RoHS Status, RAM Size.
PIC16C620A-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C620-04I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C620T-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C620-04E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C620A-04/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F627A-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C620-04/SO Tỷ lệ tối đa & tính chất điện
| Core Processor | PIC |
| Core Size | 8-Bit |
| Core Architecture | RISC (Harvard) |
| Speed (Max) | 4 MHz |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 896 B (512 x 14) |
| Data RAM | 80 B |
| Number of I/O Pins | 13 |
| Hộp / Vỏ | 18-SOIC (SO) - 0.295" wide body, gull-wing |
| Kiểu lắp đặt | Surface Mount |
| Operating Temperature (Commercial) | 0C to +70C |
| Operating Voltage Range | 3.0 V to 6.0 V (5 V typical) |
| Oscillator Type | External |
| Peripherals | Watchdog Timer (WDT), Power-on Reset (POR), TMR0 8-bit Timer/Counter, Brown-out Reset |
| Instruction Set | 35 single-word/single-cycle instructions |
| Cấp MSL | 1 (unlimited) |
| Trạng thái RoHS | Non-compliant (contains Pb in OTP windowed variants); check lot |
Cấu hình chân PIC16C620-04/SO
| Chân 1 | RA2 — Bidirectional I/O port A bit 2 |
| Chân 2 | RA3 — Bidirectional I/O port A bit 3 |
| Chân 3 | RA4/T0CKI — Bidirectional I/O port A bit 4 / TMR0 clock input |
| Chân 4 | MCLR — Master Clear (reset) input, active low |
| Chân 5 | VSS — Ground reference |
| Chân 6 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Chân 7 | OSC2/CLKOUT — Oscillator crystal output / clock output (4 MHz at OSC1) |
| Chân 8 | RC0 — Bidirectional I/O port C bit 0 |
| Chân 9 | RC1 — Bidirectional I/O port C bit 1 |
| Chân 10 | RC2 — Bidirectional I/O port C bit 2 |
| Chân 11 | RC3 — Bidirectional I/O port C bit 3 |
| Chân 12 | RC4 — Bidirectional I/O port C bit 4 |
| Chân 13 | RC5 — Bidirectional I/O port C bit 5 |
| Chân 14 | RC6 — Bidirectional I/O port C bit 6 |
| Chân 15 | RC7 — Bidirectional I/O port C bit 7 |
| Chân 16 | VDD — Positive supply (3.0 V to 6.0 V) |
| Chân 17 | RA6 — Bidirectional I/O port A bit 6 |
| Chân 18 | RA7 — Bidirectional I/O port A bit 7 |
Ứng dụng tiêu biểu
PIC16C620-04/SO phù hợp cho 6 Áp dụngs: Remote Control Transmitter, Small Appliance Controller (Coffee Maker / Toaster), Security System Keypad / Access Control Panel, Sensor Interface Module (Temperature / Pressure), Industrial Timer / Counter Module, Battery-Powered Low-Cost Toys / Gadgets.
Remote Control Transmitter
The PIC16C620-04/SO fits remote control transmitters because its 4 MHz core delivers 1 MIPS, more than enough for IR carrier generation (typically 38-40 kHz), button-debounce scanning across a 4x4 keypad matrix using only 8 I/O pins, and small protocol-encoded command buffers. With 896 bytes of OTP the entire transmit state machine fits in a single device, eliminating external logic.
Được đề xuất
Small Appliance Controller (Coffee Maker / Toaster)
The PIC16C620-04/SO is well-suited for small appliance control because its 13 I/O pins directly drive 7-segment LED indicators, relay coils for heater elements, and rotary encoder inputs without external mux logic. The 80-byte RAM handles timer counters for brew-cycle sequencing, and the 3.0-6.0 V supply range accepts unregulated DC from rectified mains without additional regulators.
Được đề xuất
Security System Keypad / Access Control Panel
For keypad entry controllers, the PIC16C620-04/SO scans a 12-key matrix with 8 I/O pins using standard diode-isolation techniques, verifies a 4-6 digit PIN stored in OTP, and drives a magnetic-door strike relay. The 896B OTP stores encrypted PIN tables and protocol handlers for Wiegand-output readers. The industrial-grade PIC16C620-04I/SO variant extends the operating range for outdoor keypads.
Được đề xuất
Sensor Interface Module (Temperature / Pressure)
Sensor-interface modules benefit from the PIC16C620-04/SO because its built-in TMR0 8-bit timer/counter handles interval timing for periodic sensor reads, while 13 I/O drive SPI or I2C peripherals to external sensors. The 80-byte RAM buffers up to ~20 12-bit ADC readings at 5 ms sample intervals. OTP memory stores calibration tables and linearization polynomials.
Được đề xuất
Industrial Timer / Counter Module
The PIC16C620-04/SO is a strong fit for industrial timer modules because the 8-bit TMR0 combined with a 4 MHz instruction cycle delivers 1 us resolution, and the watchdog timer adds failsafe auto-reset on firmware lockup. The 18-SOIC package is small enough for DIN-rail-mount timer enclosures, and the 3.0-6.0 V supply accepts 5 V or 24 V (with regulator) industrial rails.
Được đề xuất
Battery-Powered Low-Cost Toys / Gadgets
Battery-powered toys benefit from the PIC16C620-04/SO because the 3.0 V minimum supply operates directly from 2 AA cells (2.4-3.2 V), and the 5 mA typical operating current is acceptable for short-play sessions. The 4 MHz CPU drives simple PWM motor control and LED chase patterns with 896 bytes of OTP. For even lower quiescent current, the PIC16C620-04I/SO with brown-out reset extends battery runtime.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C620-04/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 | PIC16C620A-04/SO | PIC16C620-04I/SO | PIC16C620T-04/SO | PIC16C620-04E/SO | PIC16F627A-I/SO |
|---|---|---|---|---|---|---|
| Package | 18-SOIC (SO) | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash |
| Program Memory Size | 896 B (512 x 14) | 896 B | 896 B | 896 B | 896 B | 1.75 KB (flash) |
| Data RAM | 80 B | 80 B | 80 B | 80 B | 80 B | 224 B |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Number of I/O | 13 | 13 | 13 | 13 | 13 | 16 |
| Operating Temperature | 0C to +70C (Commercial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +125C (Extended) | -40C to +85C (Industrial) |
Bảo phân biệt quan trọng
- Silicon-revision A errata fixes over original -04/SO (vsPIC16C620-04/SO (this product))
- Industrial temperature grade option available in same package (vsPIC16C620-04I/SO)
- Field-reprogrammable flash upgrade in same 18-SOIC footprint (vsPIC16F627A-I/SO)
Ghi chú thiết kế
The PIC16C620-04/SO is an OTP EPROM device - once programmed, the firmware CANNOT be erased or rewritten. Do not use this part for prototypes or any design where firmware changes are expected. For development, use PIC16F627A-I/SO (flash) in the same 18-SOIC footprint, then migrate to PIC16C620-04/SO only when firmware is locked. A common pitfall is to order the OTP version for engineering samples and then need firmware changes - this wastes the entire lot.
Place the 4 MHz crystal or resonator as close as possible to the OSC1 (pin 6) and OSC2 (pin 7) pins, with short traces and a solid ground plane beneath. Add a 1 M-ohm parallel resistor across the crystal if low-drive crystals are used, and keep digital signal traces away from the OSC traces to avoid coupling noise into the clock. Place decoupling capacitors (100 nF + 10 uF) within 5 mm of the VDD pin (pin 16).
Estimated: at 4 MHz and 5 V supply the PIC16C620-04/SO draws approximately 5 mA typical, less than 25 mA worst case. Total power is therefore below 125 mW, well within the SOIC package's thermal limit. For battery-powered designs, use the watchdog timer's internal RC oscillator (~1.6 uA) and SLEEP mode to drop quiescent current to single-digit microamps, enabling years of life on 2xAA cells.
Thông tin tuân thủ
PIC16C620-04/SO is generally listed as RoHS non-compliant at distributors due to Pb-bearing OTP EPROM windowed packages historically used; verify lot-specific RoHS certificates of compliance with Microchip CoC database. For RoHS-required designs, migrate to PIC16F627A-I/SO or PIC16F648A-I/SO in the same 18-SOIC footprint.
