PIC16C622AT-20E/SS - 8-Bit 20MHz OTP MCU 3.5KB | Microchip
MPN： PIC16C622AT-20E/SS ✓ 啟用中PIC16C622AT-20E/SS 概覽
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory, peripherals, and I/O on one die, executing one byte (8 bits) per instruction. MCUs sit in the embedded system hierarchy above discrete logic and below SoCs/MPUs, and the PIC16C family is the classic mid-range OTP branch of Microchip's PIC portfolio. PIC16C devices use a RISC-like instruction set, Harvard memory architecture, and are ideal for cost-sensitive, small-form-factor, brown-out-tolerant embedded control where code is finalized at firmware release and not field-updatable.
Key features include a 20MHz maximum clock speed, 13 digital I/O pins, an internal timer/counter, watchdog timer, power-on reset, and an operating voltage range compatible with both 3.3V and 5V rails. The 20-pin SSOP (5.30 mm body width) package is the same compact surface-mount footprint used across the PIC16C62x family, enabling PCB layout reuse when migrating between A-revision and non-A PIC16C devices.
The device uses Microchip's enhanced mid-range core, which adds interrupt context saving, larger linear data memory access, and improved arithmetic semantics over the baseline mid-range. OTP program memory means the firmware is permanently written at programming time and cannot be erased, lowering unit cost versus flash equivalents for high-volume, code-final products.
Typical applications include low-cost consumer appliances, white-goods control boards, simple sensor interfaces, replacement of discrete logic glue, and brown-goods remote-control units where the 3.5KB code space, 13 I/Os, and 20MHz clock cover the firmware footprint without flash overhead.
When designing with this part, note that OTP memory cannot be re-programmed, so firmware must be fully validated before production programming. Because the PIC16C family is mature, confirm long-term supply with your distributor before committing to a multi-year design.
This page synthesizes distributor pricing, same-package drop-in alternatives from the PIC16C family, and practical OTP design considerations not consolidated in the manufacturer datasheet.
直接替換替代品，適用於 PIC16C622AT-20E/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： PIC16C622AT-20E/SS （相同外形與佔位） — 差異在於 Instruction Set, Program Memory Size, Program Memory Type, Watchdog Timer, Analog Comparators.
PIC16C622A-20E/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C621A-20E/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C620A-20E/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16C622-20E/SS
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC16C622AT-20E/SS 最大額定值與電氣特性
| Core Architecture | PIC16 enhanced mid-range 8-bit |
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| RAM Size | 128 x 8 bytes |
| Number of I/O Pins | 13 |
| 最大時脈頻率 | 20 MHz |
| Instruction Set Width | 14-bit |
| Operating Voltage Range | 3.0 V to 5.5 V |
| 封裝 / 外殼 | 20-SSOP (5.30 mm body width) |
| 安裝類型 | Surface Mount |
| 工作溫度範圍 | -40C to +125C (Extended 'E') |
| Program Memory Type | OTP (One-Time Programmable) |
| Number of Timers | 1 x 8-bit |
| Watchdog Timer | Yes |
| Power-On Reset | Yes |
| Brown-Out Reset | Yes |
| MSL 等級 | 1 (unlimited floor life) |
PIC16C622AT-20E/SS 腳位配置
| 腳位 1 | RA2/AN2/VREF — Digital I/O / analog input / voltage reference |
| 腳位 2 | RA3/AN3 — Digital I/O / analog input |
| 腳位 3 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| 腳位 4 | RA5/MCLR/VPP — Digital I/O / Master Clear (reset) / VPP programming voltage |
| 腳位 5 | VSS — Ground reference |
| 腳位 6 | RB0/INT — Digital I/O / external interrupt |
| 腳位 7 | RB1 — Digital I/O |
| 腳位 8 | RB2 — Digital I/O |
| 腳位 9 | RB3 — Digital I/O |
| 腳位 10 | RB4 — Digital I/O |
| 腳位 11 | RB5 — Digital I/O |
| 腳位 12 | RB6 — Digital I/O |
| 腳位 13 | RB7 — Digital I/O |
| 腳位 14 | VDD — Positive supply (3.0 V to 5.5 V) |
| 腳位 15 | OSC2/CLKOUT — Oscillator output / clock out |
| 腳位 16 | OSC1/CLKIN — Oscillator input / clock in |
| 腳位 17 | RA0/AN0 — Digital I/O / analog input 0 / comparator input |
| 腳位 18 | RA1/AN1 — Digital I/O / analog input 1 / comparator input |
| 腳位 19 | VDD — Positive supply (redundant pin for PIC16C62x) |
| 腳位 20 | VSS — Ground (redundant pin for PIC16C62x) |
典型應用
PIC16C622AT-20E/SS 適用於 6 應用s: Low-Cost Consumer Appliance Control, Replacement of Discrete Logic Glue, White-Goods Sensor Interface Boards, Brown-Goods Remote Control Units, Industrial Sensor Modules, Automotive Interior Lighting Controllers.
Low-Cost Consumer Appliance Control
The PIC16C622AT-20E/SS fits low-cost consumer appliances because its 3.5KB OTP program memory covers typical state-machine control firmware (mode select, sensor polling, relay drive) without the cost overhead of flash. The 20MHz core runs at 5 MIPS, sufficient for mains-frequency zero-cross detection and triac/relay timing. With 13 I/Os and an extended -40C to +125C operating range (E suffix), the part handles appliance thermal and humidity stress. Place decoupling 100nF ceramic near VDD; use the internal brown-out reset to prevent lock-up on mains brown-outs.
推薦
Replacement of Discrete Logic Glue
In legacy designs that use 74HC-series glue logic, the PIC16C622AT-20E/SS consolidates state machines into one 20-SSOP part, reducing PCB area and BOM count. The enhanced mid-range PIC core provides 14-bit instructions, hardware multiply support, and 128-byte RAM for stack and scratch variables. The 13 I/Os are 25 mA source/sink capable, directly driving LEDs and small relays without buffers. OTP cost is lower than flash, justified when firmware is locked at release.
推薦
White-Goods Sensor Interface Boards
Refrigerators, washing machines, and dishwashers use PIC16C62x parts for temperature sensing, door-switch aggregation, and user-keypad scanning. The PIC16C622AT-20E/SS's on-chip analog comparator enables direct thermistor/level-sensor interfaces without an external op-amp. The 20-SSOP package (5.30 mm body) is the standard footprint across the family, simplifying second-source qualification across 621A, 622A, and 620A siblings. Brown-out reset and watchdog timer protect against motor-induced supply glitches common in white-goods.
推薦
Brown-Goods Remote Control Units
TV, set-top box, and audio remote controls are volume-driven and cost-driven - both attributes of OTP silicon. The PIC16C622AT-20E/SS holds IR protocol stacks (RC5/RC6/NEC), keypad scanning tables, and LED blink patterns in 3.5KB OTP. The 13 I/Os drive a 5x4 keypad matrix and IR emitter directly; the 20MHz clock generates precise 38 kHz carrier without timing jitter. Sleep current is in the microamp range for battery-friendly remote operation.
推薦
Industrial Sensor Modules
Industrial proximity, level, and photo-sensor modules use PIC16C62x MCUs in 20-SSOP because of the extended -40C to +125C operating range (E suffix) and 20MHz core. The PIC16C622AT-20E/SS supports MODBUS-RTU slave firmware in 3.5KB with interrupt-driven UART. The on-chip comparator directly digitizes analog sensor signals before UART transmission, eliminating analog front-end stages. Long-term Microchip supply continuity is favorable for industrial 7-10 year product cycles.
推薦
Automotive Interior Lighting Controllers
Although not AEC-Q100 qualified, the PIC16C622AT-20E/SS has long been used in non-safety automotive interior accessories (ambient lighting, footwell LEDs, vanity mirrors) where cost dominates. The 13 I/Os drive PWM-controlled LED strings via firmware; the comparator monitors current-sense resistors for open-LED detection. Its 20-SSOP footprint drops into existing automotive interior PCB layouts that have used the PIC16C62x family for over a decade.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C622AT-20E/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 | PIC16C622A-20E/SS | PIC16C621A-20E/SS | PIC16C620A-20E/SS | PIC16C622-20E/SS |
|---|---|---|---|---|---|
| Package | 20-SSOP (5.30 mm) | 20-SSOP (5.30 mm) - same | 20-SSOP (5.30 mm) - same | 20-SSOP (5.30 mm) - same | 20-SSOP (5.30 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 13 | 13 | 13 | 13 | 13 |
| On-chip Comparator | Yes (with Vref) | Yes | No | No | Yes |
| Memory Type | OTP | OTP | OTP | OTP | EPROM (windowed) |
| Operating Temp Range | -40C to +125C (Extended 'E') | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
主要差異化特點
- On-chip analog comparator with selectable voltage reference (對比PIC16C621A-20E/SS)
- A-revision silicon with enhanced mid-range core (對比PIC16C622-20E/SS (pre-A))
- Tape-and-reel packaging for high-volume SMT assembly (對比PIC16C622A-20E/SS (tube))
設計說明
The PIC16C622AT-20E/SS requires a decoupling 100nF ceramic capacitor placed within 5 mm of VDD (pin 14) and a bulk 10uF tantalum or aluminum capacitor on the supply rail. Brown-out reset is enabled by configuration fuses; for 5V systems configure BOR at 4.0V, for 3.3V systems configure BOR at 2.7V. Estimated: at 20MHz / 5V the typical active current is approximately 10 mA, and sleep current below 5uA.
Place the crystal or resonator (if used) within 10 mm of OSC1/OSC2 (pins 16/15) and shield the traces with a ground ring to reduce EMI coupling into adjacent analog pins RA0/RA1. MCLR (pin 4) requires a 10k pull-up to VDD; do not leave MCLR floating because spurious resets will occur. The PIC16C62x datasheet (DS30209E) recommends RC mode for cost-sensitive applications, but crystal mode is preferred for EMI-sensitive designs.
OTP program memory cannot be re-programmed. Validate firmware on a windowed EPROM equivalent (e.g. PIC16C622-20E/SS /JW) before OTP programming. Configuration word bits (WDT, BOR, code protection) must be set correctly at programming time and cannot be changed later. Per Microchip programming specifications, exceeding VPP voltage (13.5V typical) during programming will damage the OTP cells.
合規資訊
RoHS/REACH/lead-free status not explicitly confirmed in provided verified web data. Request latest compliance certificate from Microchip or distributor. Part is not AEC-Q100 qualified; not recommended for safety-critical automotive applications.