PIC16C622-20/SS - 8-Bit CMOS EPROM MCU, 3.5KB, 13 I/O | Microchip
MPN： PIC16C622-20/SS ✗ 停產PIC16C622-20/SS 概覽
A microcontroller is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces into one device. The PIC16C62X belongs to the PIC16 mid-range family, a RISC architecture family within Microchip's 8-bit MCU hierarchy that sits between baseline PIC10/12/14 devices and the enhanced PIC18 family. EPROM (Erasable Programmable Read-Only Memory) is one-time-erasable UV-window program memory, distinguishing this part from flash-based PIC16F equivalents and making it suitable for legacy and development environments where windowed erasure is acceptable.
Key features include 35 single-word instructions, 14-bit instruction word, 8-level deep hardware stack, direct/indirect/relative addressing, power-on reset, power-up timer, oscillator start-up timer, and brown-out detection. The device operates from 3.0 V to 6.0 V across commercial 0 °C to +70 °C and industrial -40 °C to +85 °C grades. The PIC16C622 variant adds a single analog comparator and a voltage reference module, distinguishing it from the PIC16C620 (no comparator) and PIC16C621 (comparator only).
Typical applications include legacy embedded control systems, industrial sensor interfaces, simple motor control loops, appliance controllers, security and alarm panels, and automotive body electronics where pin-compatible PIC16F replacements are not required. The wide 3.0 V-6.0 V supply range supports both 3.3 V and 5 V rails commonly found in legacy industrial designs.
When designing with this device, note that EPROM parts require a quartz-windowed package for erasure and a PROM programmer for code loading. Modern designs typically migrate to the pin-compatible flash-based PIC16F628 or PIC16F88, which share the SSOP-20 footprint but support in-circuit reprogramming. The PIC16C622-20/SS is recommended for legacy maintenance, existing design replication, and applications where the EPROM technology is mandated.
直接替換替代品，適用於 PIC16C622-20/SS — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16C622-20/SS （相同外形與佔位） — 差異在於 Package, Program Memory Size, Operating Temperature Range, Timers, Program Memory Type.
PIC16F628A-20/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16C622-20I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C622-20E/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C621A-20/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16C620A-20/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16F88-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C622-20/SS 最大額定值與電氣特性
| Program Memory Type | EPROM (UV-erasable, one-time programmable in package) |
| Program Memory Size | 3.5 KB (2048 x 14-bit words) |
| Data RAM | 128 bytes |
| Data EEPROM | 128 bytes |
| CPU Core | PIC16 RISC, 8-bit, 14-bit instruction word |
| 最大時脈頻率 | 20 MHz |
| Instruction Set Size | 35 single-word instructions |
| I/O Pins | 13 |
| Timers | 1 x 8-bit Timer/Counter with prescaler |
| Watchdog Timer | Yes (independent RC oscillator) |
| Analog Comparator | 1 (with internal voltage reference) |
| Supply Voltage Range | 3.0 V to 6.0 V |
| 工作溫度範圍 | 0 C to +70 C (commercial, -20 suffix) |
| Package Type | SSOP-20 (Shrink Small Outline, 5.30 mm body, 0.65 mm pitch) |
| 安裝類型 | Surface Mount |
| Packaging | Tube |
| Power-on Reset / Brown-out Reset | Yes |
| RoHS 狀態 | Non-compliant (contains lead, EPROM-era process) |
PIC16C622-20/SS 腳位配置
| 腳位 1 | RA2/AN2/VREF — Port A bit 2 / Comparator input / Voltage reference output |
| 腳位 2 | RA3/AN3 — Port A bit 3 / Comparator input |
| 腳位 3 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input (open-drain) |
| 腳位 4 | MCLR/VPP — Master clear reset (active low) / Programming voltage input |
| 腳位 5 | VSS — Ground reference |
| 腳位 6 | RB0/INT — Port B bit 0 / External interrupt input |
| 腳位 7 | RB1 — Port B bit 1 (digital I/O) |
| 腳位 8 | RB2 — Port B bit 2 (digital I/O) |
| 腳位 9 | RB3 — Port B bit 3 (digital I/O) |
| 腳位 10 | RB4 — Port B bit 4 (interrupt-on-change) |
| 腳位 11 | RB5 — Port B bit 5 (interrupt-on-change) |
| 腳位 12 | RB6 — Port B bit 6 (interrupt-on-change) |
| 腳位 13 | RB7 — Port B bit 7 (interrupt-on-change) |
| 腳位 14 | VDD — Positive supply voltage (3.0 V to 6.0 V) |
| 腳位 15 | OSC2/CLKOUT — Oscillator output / Clock output (Fosc/4) |
| 腳位 16 | OSC1/CLKIN — Oscillator input / External clock input |
| 腳位 17 | RA0/AN0 — Port A bit 0 / Comparator non-inverting input |
| 腳位 18 | RA1/AN1 — Port A bit 1 / Comparator inverting input |
| 腳位 19 | RA5/SS — Port A bit 5 (digital I/O) |
| 腳位 20 | RA7 — Port A bit 7 (digital I/O) |
典型應用
PIC16C622-20/SS 適用於 6 應用s: Legacy Industrial Sensor Interface, Appliance Control Board, Security and Alarm Panel Controller, Automotive Body Electronics (Legacy), Simple Motor Speed Controller, Hobby and Educational Robotics.
Legacy Industrial Sensor Interface
The PIC16C622-20/SS's integrated analog comparator with programmable internal voltage reference makes it well-suited for legacy 4-20 mA sensor signal conditioning loops. The internal VREF module sets comparator threshold without external resistors, while 13 I/O pins interface to switch sensors, relay outputs, and isolated digital lines. Operating at 20 MHz with 200 ns instruction cycle, it samples analog thresholds in microseconds and triggers actuator responses deterministically. The 3.0-6.0 V supply range accepts both 3.3 V and 5 V industrial rails common in PLC and DCS retrofit installations.
推薦
Appliance Control Board
The PIC16C622-20/SS is widely deployed in legacy washing-machine, dishwasher, and microwave control boards where the EPROM-based design was validated over decades of field operation. 13 I/O lines drive LED indicators, button matrix scans, triac-fired heater elements, and buzzer outputs. The 35-instruction RISC core simplifies code review for safety-critical appliances, while the brown-out reset protects against brown-out-induced latch-up during motor inrush. Migration to PIC16F628A-I/SS is recommended for new designs requiring field firmware updates.
推薦
Security and Alarm Panel Controller
The PIC16C622-20/SS integrates the necessary peripherals for legacy wired alarm panels: 13 I/O lines scan PIR sensors, door/window contacts, and keypad matrix; the analog comparator detects line-cut tamper signals via voltage threshold; the watchdog timer resets the MCU on firmware lockup. EPROM technology ensures the security code cannot be field-modified, providing tamper resistance. The 3.5 KB program memory accommodates zone-monitoring state machines with up to 8 zones plus keypad decoder logic.
推薦
Automotive Body Electronics (Legacy)
In pre-2000 automotive body control modules, the PIC16C622-20/SS served as a node controller for door locks, mirror adjustments, and lighting control. The 13 I/O lines drive MOSFET low-side switches for incandescent lamps and relay coils, while the comparator monitors battery voltage for brown-out detection. The 6.0 V absolute maximum tolerates load-dump transients typical of 12 V automotive electrical systems when paired with external TVS protection. Industrial-grade -20I/SS variant extends operating temperature to +85 °C for under-hood applications.
推薦
Simple Motor Speed Controller
The PIC16C622-20/SS's 8-bit timer with prescaler generates PWM signals for brushed DC motor speed control in legacy fan, pump, and small appliance applications. The analog comparator implements back-EMF sensing for sensorless speed feedback, while the programmable VREF sets the overcurrent trip threshold for FET protection. At 20 MHz the PWM frequency reaches 78 kHz (8-bit) above the audible range, eliminating acoustic noise. Brown-out reset protects the motor driver during supply sag.
推薦
Hobby and Educational Robotics
The PIC16C622-20/SS remains popular in university microcontroller courses and hobby robotics due to its simple 35-instruction RISC architecture and EPROM-windowed CERDIP variant (PIC16C622-20/JW) for student code iteration. The 13 I/O lines drive servo motors via software PWM, read ultrasonic sensors, and interface to character LCDs in 4-bit mode. The internal voltage reference simplifies analog sensor calibration without external components. Although flash-based PIC16F628 is preferred for new designs, EPROM parts teach fundamental one-time-programming concepts in CS/EE curricula.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C622-20/SS — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16F628A-20/SS | PIC16C622-20I/SS | PIC16C622-20E/SS | PIC16C621A-20/SS | PIC16F88-I/SS |
|---|---|---|---|---|---|---|
| Package | SSOP-20 | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | EPROM 3.5 KB | Flash 3.5 KB | EPROM 3.5 KB | EPROM 3.5 KB | EPROM 3.5 KB | Flash 7 KB |
| RAM | 128 B | 224 B | 128 B | 128 B | 128 B | 368 B |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Temperature | 0 C to +70 C (commercial) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +125 C (extended) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) |
| Analog Comparator + VREF | 1 comparator + VREF module | 1 comparator + VREF module | 1 comparator + VREF module | 1 comparator + VREF module | 1 comparator (no VREF module) | 1 comparator + VREF + ADC 10-bit |
| RoHS Compliance | Non-compliant (leaded) | Compliant (lead-free) | Non-compliant (leaded) | Non-compliant (leaded) | Non-compliant (leaded) | Compliant (lead-free) |
| Supply Voltage Range | 3.0 V to 6.0 V | 3.0 V to 5.5 V | 3.0 V to 6.0 V | 3.0 V to 6.0 V | 3.0 V to 6.0 V | 2.0 V to 5.5 V |
主要差異化特點
- Integrated voltage reference module eliminates external components (對比PIC16C621A-20/SS)
- EPROM technology provides one-time-programmable security (對比PIC16F628A-20/SS)
- SSOP-20 footprint shared with flash-based PIC16F family (對比PIC16F88-I/SS)
設計說明
EPROM parts require a UV-windowed CERDIP package for code erasure. The PIC16C622-20/SS in SSOP-20 is one-time-programmable only - any code bug requires physical replacement of the chip. For development iteration, use the CERDIP windowed variant (PIC16C622-20/JW) and erase with UV light (30 min at 12,000 uW/cm2). Production programmers must verify EPROM cell margins at VDD min (3.0 V) and VDD max (6.0 V) per the Microchip programming specification.
Estimated: At 20 MHz and 5 V supply with all peripherals active, the PIC16C622-20/SS draws approximately 10-15 mA typical operating current. Decoupling requires a 0.1 uF ceramic capacitor placed within 5 mm of the VDD pin and a 10 uF tantalum bulk capacitor on the supply rail. Brown-out reset must be enabled in the configuration word (BODEN bit) to protect data EEPROM from corruption during supply sag below 4.0 V. The MCLR pin requires a 10 kohm pull-up to VDD for reliable reset behavior.
The SSOP-20 package has a 0.65 mm pin pitch requiring fine-pitch PCB assembly capability. Recommended land pattern per IPC-7351 (SSOP standard density): pad width 0.40 mm, pad length 1.50 mm, pad pitch 0.65 mm. Stencil aperture should be 0.50 mm x 1.80 mm for adequate solder paste volume. The exposed center pad (if present in variant) requires thermal vias to inner ground plane for heat dissipation. Avoid running high-speed traces under the package to minimize capacitive coupling.
Place the external crystal or ceramic resonator within 5 mm of the OSC1 and OSC2 pins with short, symmetric traces to minimize parasitic capacitance and EMI radiation. For HS mode (20 MHz crystal), add 22-33 pF load capacitors from each oscillator pin to ground, selected per the crystal manufacturer's load capacitance specification. Guard the oscillator traces with a ground pour and keep digital switching signals (PORTB output drivers) at least 3 mm away to avoid frequency modulation.
合規資訊
RoHS non-compliant due to lead-bearing termination typical of EPROM-era SSOP packages. Reach status not explicitly stated in available data. Not AEC-Q100 qualified (commercial/industrial grade only). For RoHS-compliant pin-compatible replacement, use PIC16F628A-I/SS or PIC16F88-I/SS.
