PIC16C622AT-20/SO - 8-bit OTP MCU 3.5KB 20MHz | Microchip
MPN: PIC16C622AT-20/SO ✓ Hoạt độngPIC16C622AT-20/SO Tóm tắt
An OTP microcontroller is a type of embedded controller that uses one-time-programmable non-volatile memory for code storage, typically chosen for low-cost, high-volume applications where firmware is finalized before production and field reprogramming is not required. Within the broader microcontroller hierarchy, OTP MCUs sit alongside flash-based MCUs as a sub-category of 8-bit microcontrollers, which themselves belong to the larger class of microcontrollers and ultimately to embedded systems and semiconductors. The PIC16C622A device supports a 2.0V to 6.0V operating voltage range, making it suitable for both 3.3V and 5V systems common in industrial and consumer electronics.
Key features include a Harvard RISC architecture with 35 single-word instructions, a 14-bit instruction word, 8-level hardware stack, integrated Power-on Reset (POR), Brown-out Reset (BOR), watchdog timer with on-chip RC oscillator, and two analog comparators. The PIC16C622A also incorporates a 16-bit timer/counter (TMR1) and an 8-bit timer/counter (TMR0), enabling precise timing operations. The 13 digital I/O pins support individual direction control, and the device operates across an industrial temperature range of -40°C to +85°C.
The PIC16C622A utilizes Microchip's enhanced mid-range core, providing deterministic instruction execution at 200 ns per instruction cycle at 20 MHz. The Harvard architecture separates program and data memory, allowing simultaneous fetch and access for improved throughput. The integrated analog comparators with programmable reference and configurable output polarity eliminate the need for external comparator ICs in many signal-conditioning designs. The 128-byte RAM supports general-purpose data storage, while the 3.5 KB OTP program memory is partitioned into 2K words of 14 bits each.
Typical applications include appliance control (washing machines, microwave ovens, coffee makers), battery chargers, sensor signal conditioning, motor control for low-power DC fans, IR remote controls, and small consumer electronics. The device's combination of analog comparators, timers, and low power consumption makes it well-suited for stand-alone embedded systems that must operate reliably without firmware updates.
When designing with this device, note that OTP memory cannot be re-programmed, so firmware must be fully validated before commitment. Engineers migrating from this OTP part to flash-based PIC16F equivalents (such as PIC16F630 or PIC16F676) can reuse code with minimal changes, while gaining in-system reprogrammability for development and field updates.
This page synthesizes distributor pricing, drop-in alternative recommendations, and practical design notes for the PIC16C622AT-20/SO that are not aggregated in any single manufacturer or distributor source.
Bộ thay thế dễ dàng lắp đặt cho PIC16C622AT-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 PIC16C622AT-20/SO (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Size, Program Memory Type, Analog Comparators, Operating Temperature Range.
PIC16C622A-20/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C622A-20E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C622AT-04E/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C621AT-20E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C622AT-20/SO Tỷ lệ tối đa & tính chất điện
| Core Processor | PIC |
| Core Size | 8-bit |
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| RAM Size | 128 bytes |
| EEPROM Size | None |
| Tần số xung maksimum | 20 MHz |
| Number of I/O Pins | 13 |
| Supply Voltage Range | 2.0 V to 6.0 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C |
| Hộp | 18-pin SOIC (SO) |
| Kiểu lắp đặt | Surface Mount |
| Data Converters | None (2 analog comparators only) |
| Timers/Counters | 1 x 8-bit, 1 x 16-bit |
| Connectivity | UART/USART |
| Peripherals | Brown-out Reset, POR, WDT, Comparators |
| Oscillator Type | External / Internal RC |
| Program Memory Type | OTP (One-Time Programmable) |
| Instruction Set | 35 instructions, 14-bit word |
| Trạng thái RoHS | unknown |
Cấu hình chân PIC16C622AT-20/SO
| Chân 1 | RA2 — Bidirectional I/O / analog comparator output |
| Chân 2 | RA3 — Bidirectional I/O / analog comparator input |
| Chân 3 | RA4 — Bidirectional I/O / TMR0 clock input |
| Chân 4 | RA5 — Bidirectional I/O / analog comparator input |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0 — Bidirectional I/O / external interrupt |
| Chân 7 | RB1 — Bidirectional I/O |
| Chân 8 | RB2 — Bidirectional I/O |
| Chân 9 | RB3 — Bidirectional I/O |
| Chân 10 | RB4 — Bidirectional I/O / interrupt-on-change |
| Chân 11 | RB5 — Bidirectional I/O / interrupt-on-change |
| Chân 12 | RB6 — Bidirectional I/O / interrupt-on-change / ICSP clock |
| Chân 13 | RB7 — Bidirectional I/O / interrupt-on-change / ICSP data |
| Chân 14 | VDD — Positive supply voltage |
| Chân 15 | OSC2 — Oscillator output / external clock out |
| Chân 16 | OSC1 — Oscillator input / external clock in |
| Chân 17 | RA0 — Bidirectional I/O / analog comparator input |
| Chân 18 | RA1 — Bidirectional I/O / analog comparator input |
Ứng dụng tiêu biểu
PIC16C622AT-20/SO phù hợp cho 6 Áp dụngs: Appliance Control Boards, Battery Chargers and Power Management, Consumer IR Remote Controls, Sensor Signal Conditioning, Low-Power DC Fan Motor Control, Industrial Timer and Counter Modules.
Appliance Control Boards
The PIC16C622AT-20/SO is widely deployed in appliance control boards for washing machines, dishwashers, microwave ovens, and coffee makers, where its 3.5 KB OTP program memory, 13 I/O pins, and two on-chip analog comparators deliver sufficient resources for relay driving, sensor monitoring, and user interface multiplexing. The 2.0 V to 6.0 V operating range supports both 5 V and 3.3 V power rails typical in white goods, while the integrated brown-out reset and watchdog timer prevent lockup under noisy mains conditions. Compared to flash MCUs, the OTP-only memory reduces per-unit cost, a critical factor when designing for high-volume consumer appliances where firmware is fixed long before production.
Được đề xuất
Battery Chargers and Power Management
Battery charger designs benefit from the PIC16C622AT-20/SO's on-chip analog comparators, which can directly sense voltage and current without external amplifier ICs. The 16-bit TMR1 timer provides accurate PWM generation for switching converters, while the integrated brown-out reset ensures defined startup from deeply discharged batteries. OTP memory is ideal here because charger firmware rarely changes, and the lower die cost allows aggressive pricing in consumer battery products. The USART peripheral can also drive SMBus-style communication with battery gauges for multi-cell monitoring in higher-end applications.
Được đề xuất
Consumer IR Remote Controls
The PIC16C622AT-20/SO serves effectively in infrared remote control transmitters, where its sleep current in the microamp range extends battery life and its 16-bit TMR1 supports accurate carrier generation for IR protocols such as RC5, NEC, and SIRC. Only a handful of I/O pins are needed to drive IR LEDs, key-scan matrices, and indicator LEDs, leaving ample headroom in the 13-pin budget. The OTP program memory locks in protocol code to prevent field-tampering, which is desirable for licensed-content appliances, while the small 18-pin SOIC footprint fits inside cramped remote enclosures with hand-held battery operation.
Được đề xuất
Sensor Signal Conditioning
The PIC16C622AT-20/SO excels in sensor signal conditioning applications because its two on-chip analog comparators can perform threshold detection without external components. A thermistor or photodiode front-end feeds the comparator, while the 8-bit TMR0 provides debounce and timing. The OTP memory keeps firmware locked once the threshold curves are calibrated, and the 18-pin SOIC package is small enough for inline sensor modules. The integrated UART lets the conditioned sensor data stream to a host controller in industrial sensor networks.
Được đề xuất
Low-Power DC Fan Motor Control
Low-power DC fan and small brushless DC motor controllers benefit from the PIC16C622AT-20/SO's PWM capability via TMR1, its fast comparator for back-EMF sensing, and its small footprint. The 20 MHz core generates high-resolution PWM at typical 25 kHz switching frequencies, while the analog comparators detect rotor position in sensorless BLDC topologies. Brown-out reset prevents the fan from stalling at low supply voltages. With OTP memory, the firmware is locked once the motor calibration curves are finalized, reducing the risk of unauthorized retuning in commercial fan products.
Được đề xuất
Industrial Timer and Counter Modules
Industrial timer and counter modules use the PIC16C622AT-20/SO to provide accurate event counting, debounced key entry, and relay actuation. The 16-bit TMR1 captures external pulses with high precision, while the watchdog timer prevents lockup in unattended installations. The 18-pin SOIC package withstands conformal coating and wave-solder rework common in industrial assemblies. OTP memory protects the timing logic from accidental overwrites in the field, and the extended -40 C to +85 C temperature range supports factory-floor environments without additional thermal management.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C622AT-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 | PIC16C622A-20/SO | PIC16C622A-20E/SO | PIC16C622AT-04E/SO | PIC16C621AT-20E/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-pin SOIC | 18-pin SOIC - same | 18-pin SOIC - same | 18-pin SOIC - same | 18-pin SOIC - same |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP - same | 3.5 KB OTP - same | 3.5 KB OTP - same | 1.75 KB OTP (-50%) |
| RAM Size | 128 bytes | 128 bytes - same | 128 bytes - same | 128 bytes - same | 80 bytes |
| Max Clock Frequency | 20 MHz | 20 MHz - same | 20 MHz - same | 4 MHz (-80%) | 20 MHz - same |
| I/O Pins | 13 | 13 - same | 13 - same | 13 - same | 13 - same |
| Supply Voltage | 2.0 V to 6.0 V | 2.0 V to 6.0 V - same | 2.0 V to 6.0 V - same | 2.0 V to 6.0 V - same | 2.5 V to 6.0 V |
| Memory Type | OTP | OTP - same | OTP - same | OTP - same | OTP - same |
Bảo phân biệt quan trọng
- Tape-and-reel packaging for high-volume SMT assembly (vsPIC16C622A-20/SO)
- 20 MHz speed grade for higher-performance control loops (vsPIC16C622AT-04E/SO)
- Larger 3.5 KB program memory vs family siblings (vsPIC16C621AT-20E/SO)
Ghi chú thiết kế
The PIC16C622AT-20/SO uses OTP memory, which can be programmed only once. Engineers must fully validate firmware using a flash-equivalent PIC16F630 development board before committing to OTP production, because field updates are impossible. Source: Microchip PIC16C62X datasheet section on memory organization.
Brown-out reset (BOR) and power-on reset (POR) are integrated, but the BOR threshold is fixed; if the application requires a specific voltage floor, an external supervisor such as MCP100/MCP101 should be added. Decoupling: place a 100 nF ceramic capacitor as close as possible to the VDD pin (14) and a 10 uF bulk capacitor near the supply entry point to suppress switching transients from relays or motor loads.
For the 18-pin SOIC, keep the OSC1/OSC2 traces short to minimize stray capacitance and EMI pickup. Use a 4-layer board with a continuous ground plane to provide reference for analog comparators. Avoid routing high-current relay traces under or near the analog comparator input pins (RA0-RA3, RA5), which can couple noise into the comparator thresholds and cause spurious comparator toggling.
Thông tin tuân thủ
Compliance fields were not present in the verified web data; check the Microchip product page or the manufacturer datasheet for the latest RoHS, REACH, and lead-free status before volume commitment.