PIC16C622T-20/SO - 8-bit OTP MCU, 3.5KB, 20MHz, 18-SOIC | Microchip
MPN: PIC16C622T-20/SO ✗ Cuối đờiPIC16C622T-20/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (ROM/Flash/OTP), data memory (RAM), and programmable I/O peripherals. The PIC16C622 belongs to the mid-range 8-bit PIC family, sitting in the hierarchy: 8-bit MCU -> RISC MCU -> PIC16C -> mid-range PIC microcontroller -> embedded controller. It uses a Harvard architecture with separate program/data buses, an accumulator-based ALU, and a 14-bit instruction word.
Key features include 35 instructions, 8-level hardware stack, 4 oscillator modes (RC, LP, XT, HS), two 8-bit timers (Timer0, Timer2) and one 16-bit timer (Timer1), a 14-bit capture/compare/PWM module, an analog comparator, a watchdog timer with on-chip RC oscillator, and an in-circuit serial programming (ICSP) interface. The 18-SOIC package (7.50 mm body width) is the industry-standard surface-mount outline for this MCU family.
The PIC16C622's architecture is optimized for low-cost, deterministic real-time control with single-cycle instruction execution (except branches). Its RISC instruction set provides predictable timing for embedded control loops, while the OTP program memory is well-suited for high-volume consumer and industrial products where program changes are not expected after production.
Typical applications include appliance control, sensor signal conditioning, low-end motor control (DC brushed), HVAC fan controllers, security alarm keypads, simple LED drivers, battery chargers, and remote-control transmitters. The 13 I/O pins can directly drive LEDs, relays, or interface to sensors via the analog comparator. Industrial temperature grade parts are also available for harsher environments.
When designing with this part, ensure a 1 kΩ pull-down on MCLR/VPP and place a decoupling capacitor (typically 0.1 µF) close to VDD. Because OTP cannot be re-programmed, verify firmware on a windowed or flash-equipped equivalent (e.g., PIC16F622) before committing to production. The 20 MHz maximum clock requires a 5V supply; at lower VDD the maximum frequency is derated.
This page synthesizes verified distributor pricing, drop-in alternatives within the same 18-SOIC footprint, and practical design notes not consolidated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16C622T-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 PIC16C622T-20/SO (cùng hình factor và footprint) — khác nhau ở Program Memory Type, RAM Size, Program Memory Size, Core, EEPROM Size.
PIC16C622T-04I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C622-20/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C622T-20/SS
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C621T-20/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F622-I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C620T-20/SO
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C622T-20/SO Tỷ lệ tối đa & tính chất điện
| Family | PIC® 16C |
| Core | 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| EEPROM Size | None (external not included) |
| Number of I/O Pins | 13 |
| Tần số xung maksimum | 20 MHz |
| Instruction Set | 35 instructions, 14-bit wide |
| Supply Voltage (VDD) | 3 V to 6 V |
| Nhiệt độ hoạt động | 0 °C to +70 °C (commercial) |
| Hộp | 18-SOIC (7.50 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel |
| Process Technology | CMOS |
| Cấp MSL | 1 (unlimited floor life at <30 °C / 85 % RH) |
| Trạng thái RoHS | Non-compliant (SnPb lead finish on legacy OTP) |
| On-chip Peripherals | Analog comparator, 1x 16-bit timer, 2x 8-bit timers, 14-bit CCP, WDT |
| MCLR / VPP | Yes (single-pin MCLR/VPP) |
Cấu hình chân PIC16C622T-20/SO
| Chân 1 | RA2 — PORTA bit 2 (digital I/O) |
| Chân 2 | RA3 — PORTA bit 3 (digital I/O) |
| Chân 3 | RA4 — PORTA bit 4 (digital I/O / open-drain) |
| Chân 4 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 7 | RB1 — PORTB bit 1 (digital I/O) |
| Chân 8 | RB2 — PORTB bit 2 (digital I/O) |
| Chân 9 | RB3 — PORTB bit 3 (digital I/O / PGM) |
| Chân 10 | RB4 — PORTB bit 4 (digital I/O) |
| Chân 11 | RB5 — PORTB bit 5 (digital I/O) |
| Chân 12 | RB6 — PORTB bit 6 (digital I/O / PGC - ICSP clock) |
| Chân 13 | RB7 — PORTB bit 7 (digital I/O / PGD - ICSP data) |
| Chân 14 | VDD — Positive supply voltage (3 V to 6 V) |
| Chân 15 | OSC2/CLKOUT — Oscillator output / CLKOUT |
| Chân 16 | OSC1/CLKIN — Oscillator input / CLKIN |
| Chân 17 | RA0 — PORTA bit 0 (digital I/O / analog comparator output) |
| Chân 18 | RA1 — PORTA bit 1 (digital I/O / analog comparator input) |
Ứng dụng tiêu biểu
PIC16C622T-20/SO phù hợp cho 7 Áp dụngs: HVAC Fan & Blower Controller, Appliance Control Board (Washing Machine / Dishwasher), Security Alarm Keypad & PIR Interface, Low-End DC Brushed Motor Speed Controller, Simple LED Lighting & Signage Driver, Remote Control Transmitter (RF / IR), Battery Charger Control (Lead-Acid / NiCd).
HVAC Fan & Blower Controller
The PIC16C622T-20/SO is well-matched to HVAC fan and blower controllers that require deterministic 8-bit control of brushed DC or shaded-pole AC motors. Its 20 MHz clock and 35-instruction RISC core enable precise PWM-driven speed regulation at sample rates well below the audible band, while the on-chip 14-bit CCP module generates the PWM without external timing ICs. The 13 GPIO pins directly drive triac gate optocouplers, zero-cross detect inputs, and tachometer feedback lines. The analog comparator provides a low-cost feedback path for overcurrent detection, eliminating an external op-amp. OTP memory is acceptable because HVAC firmware is finalized at production and rarely changes across product lifetimes, keeping BOM cost low for high-volume residential installations.
Được đề xuất
Appliance Control Board (Washing Machine / Dishwasher)
In washing-machine and dishwasher control boards, the PIC16C622T-20/SO orchestrates the user-interface keypad, LED/LCD indicators, motor relay sequencing, and water-level sensor input. Its 8-bit Harvard RISC architecture delivers deterministic cycle times critical for safety interlocks, and the 128-byte RAM is sufficient for state-machine appliance logic without external memory. The 20 MHz clock allows simultaneous servicing of multiple 50/60 Hz timing references. The 13 GPIO pins map directly to common appliance I/O: 7-segment display segments, button matrix rows/columns, solenoid drivers, and door-lock status. OTP memory is preferred to lock firmware against unauthorized modification, satisfying appliance-manufacturer field-service policies.
Được đề xuất
Security Alarm Keypad & PIR Interface
The PIC16C622T-20/SO fits security alarm keypads because it can scan a 4x4 matrix keypad, drive LED status indicators, and interface to PIR motion sensors via its on-chip analog comparator. The comparator converts the PIR analog output into a clean digital trigger without an external op-amp, reducing BOM cost. Its 20 MHz core provides debounce filtering and rolling-code storage in OTP memory, ensuring firmware integrity against tampering. The 18-SOIC package is small enough for in-wall keypad housings, and the commercial temperature range (0 °C to +70 °C) covers indoor installations. For outdoor-rated panels, the industrial-temperature PIC16C622T-20I/SO variant is the recommended drop-in upgrade.
Được đề xuất
Low-End DC Brushed Motor Speed Controller
The PIC16C622T-20/SO is used in low-end brushed DC motor speed controllers where software-defined soft-start, PWM drive, and current-limit feedback are required. Its 14-bit CCP module delivers variable-duty PWM to the H-bridge FETs at 20 MHz, providing fine speed resolution below 1 %. The on-chip analog comparator implements hardware overcurrent protection by triggering an interrupt when shunt voltage exceeds a threshold - far faster than ADC polling. The 13 GPIO pins connect to direction inputs, brake signals, tachometer inputs, and serial diagnostic lines. With OTP firmware, manufacturers lock in proprietary motor-tuning profiles that cannot be reverse-engineered or modified by end users.
Được đề xuất
Simple LED Lighting & Signage Driver
Architectural LED lighting drivers and channel-letter signage controllers use the PIC16C622T-20/SO for multi-channel PWM dimming and chase-pattern sequencing. The 13 GPIO ports can each source/sink 25 mA directly to LED strings, eliminating driver transistors for low-current applications. The 14-bit CCP module plus Timer2 produce flicker-free PWM above 100 Hz, suitable for video-camera-immune lighting. OTP memory locks the chase patterns at production so that installers cannot accidentally re-program signage firmware in the field. The 20 MHz core computes gamma-corrected brightness tables for up to 8-bit dimming resolution without external logic.
Được đề xuất
Remote Control Transmitter (RF / IR)
Garage-door openers, ceiling-fan remotes, and consumer IR/RF transmitters use the PIC16C622T-20/SO for encoding fixed-format transmission protocols. The 20 MHz core generates accurate carrier frequencies (e.g., 38 kHz IR, 315/433 MHz RF) directly via Timer1/CCP, avoiding external oscillator ICs. Its 8-bit RISC instruction set fits within a small code footprint for rolling-code or fixed-code schemes stored in 3.5 KB OTP, with 128-byte RAM sufficient for button-decode state machines. The low 3 V minimum supply supports two-AA-battery operation, and the analog comparator can monitor battery voltage for low-battery warning. OTP memory ensures the rolling-code seed cannot be extracted in firmware-replacement attacks.
Được đề xuất
Battery Charger Control (Lead-Acid / NiCd)
Lead-acid and NiCd battery charger control boards leverage the PIC16C622T-20/SO for charge-state sequencing, voltage/current regulation loops, and safety timer management. The analog comparator implements the constant-current termination point (ΔV detection for NiCd, voltage plateau for lead-acid), eliminating external comparator ICs. The 14-bit CCP module drives a PWM-controlled buck regulator, and Timer1 provides 1-second timing for charge-cycle hour logging in RAM. The 13 GPIO pins map directly to relay drivers, status LEDs, and temperature-sensor inputs from a thermistor. OTP memory locks in charger calibration coefficients, preventing field modification of charging profiles that could damage batteries.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C622T-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 | PIC16C622T-04I/SO | PIC16C622-20/SO | PIC16C621T-20/SO | PIC16F622-I/SO | PIC16C620T-20/SO |
|---|---|---|---|---|---|---|
| Package | 18-SOIC (7.50 mm) | 18-SOIC (7.50 mm) - same | 18-SOIC (7.50 mm) - same | 18-SOIC (7.50 mm) - same | 18-SOIC (7.50 mm) - same | 18-SOIC (7.50 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP (3.5 KB) | OTP (3.5 KB) | OTP (3.5 KB) | OTP (3.5 KB) | Flash (4 KB) | OTP (3.5 KB) |
| Max Clock Frequency | 20 MHz | 4 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Analog Comparator | Yes (2 channels) | Yes (2 channels) | Yes (2 channels) | No | Yes (2 channels) | No |
| CCP Module | 14-bit CCP | 14-bit CCP | 14-bit CCP | None | 14-bit CCP | None |
| Operating Temperature | 0 °C to +70 °C | -40 °C to +85 °C | 0 °C to +70 °C | 0 °C to +70 °C | -40 °C to +85 °C | 0 °C to +70 °C |
| Lifecycle Status (2026) | Obsolete | Obsolete | Obsolete | Obsolete | Active | Obsolete |
Bảo phân biệt quan trọng
- Only same-package part with both analog comparator AND 14-bit CCP module (vsPIC16C621T-20/SO)
- Active migration target with flash memory and same footprint (vsPIC16F622-I/SO)
- Lower-frequency variant available for cost-sensitive, low-speed designs (vsPIC16C622T-04I/SO)
Ghi chú thiết kế
Place a 0.1 µF decoupling capacitor within 5 mm of the VDD pin (pin 14) and a bulk capacitor (typically 10 µF) at the regulator output. For battery-powered designs operating below 4.5 V, derate the maximum clock frequency - the oscillator cannot reliably run at 20 MHz when VDD drops below ~4 V. Estimated: at VDD = 3.3 V, maximum reliable FOSC is approximately 10 MHz per Microchip PIC16C62X electrical characteristics.
Keep the oscillator traces (OSC1/OSC2, pins 15-16) as short as possible and surround them with a ground pour to minimize EMI radiation. For HS (high-speed) crystal mode, add a 1 MΩ feedback resistor across OSC1 and OSC2 to bias the inverter into its linear region. Route MCLR/VPP (pin 4) away from analog inputs to prevent coupling of programming-voltage transients into sensitive comparator inputs.
OTP memory cannot be re-programmed: a single bad write bricks the part. Always verify firmware on a flash-equipped equivalent (e.g., PIC16F622-I/SO) before committing to OTP production. Confirm the ICSP pin assignments - RB6 = PGC (clock) and RB7 = PGD (data) - because using these pins as general-purpose outputs in the final design will block in-circuit programming access.
The 18-SOIC package has θJA ≈ 70 °C/W (estimated for SOIC on a 2-layer JEDEC test board without airflow). At 20 MHz with all peripherals active, ICC is approximately 10 mA at 5 V (50 mW). Under commercial temperature range this is well within limits, but industrial-grade designs (PIC16C622T-20I/SO) should verify thermal margin at +85 °C ambient with worst-case I/O loading.
RA4 is an open-drain output requiring an external pull-up resistor (typically 4.7 kΩ to 10 kΩ) when used as a digital output. When RA4 is used as the Timer0 clock input, this open-drain characteristic does not affect functionality. The analog comparator inputs (RA0/RA1) should be bypassed with 0.1 µF capacitors if they connect to noisy analog sources, preventing false comparator toggles.
Thông tin tuân thủ
Legacy OTP C-series devices were assembled with SnPb lead finish for industrial-grade reliability and are typically non-RoHS. For RoHS-compliant production, migrate to PIC16F622-I/SO. REACH compliance assumed for base materials; conflict-minerals declaration available from Microchip.