PIC16C620A-20I/P - 8-Bit 20MHz OTP MCU 896B | Microchip
料号： PIC16C620A-20I/P ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.5 | $2.50 |
| 10 | $2.3 | $23.00 |
| 100 | $2.05 | $205.00 |
| 500 | $1.82 | $910.00 |
| 1,000 | $1.55 | $1,550.00 |
PIC16C620A-20I/P 概述
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and programmable I/O peripherals. MCUs belong to the broader category of embedded processors, which sit below microprocessors in computational complexity but above discrete logic in integration. The PIC16C620A falls within the PIC16C mid-range family of MCUs, which are OTP (one-time-programmable) variants intended for mature, cost-sensitive production. Compared to flash-based PIC16F successors, OTP parts typically ship at lower unit cost but require mask/UV-erase discipline during development.
Key features include 200ns instruction cycle at 20MHz, 8-level hardware stack, 4MHz internal oscillator option on selected variants, two 8-bit timers plus one 16-bit timer, a watchdog timer with on-chip RC oscillator, power-on reset, brown-out detect, an analog comparator, and a capture/compare/PWM (CCP) module. Thirteen I/O pins are shared with the analog comparator inputs and external interrupt sources, enabling mixed-signal front-ends without external glue logic.
Architecturally, the PIC16C620A uses a Harvard-class RISC engine with separate program and data buses, a 14-bit instruction word, and a deterministic instruction pipeline. The OTP memory is implemented as EPROM cells, which retain data indefinitely after programming but cannot be electrically erased, so this part is typically used in production runs where firmware is finalized.
Typical applications include appliance control boards, lighting ballasts, security sensor interfaces, automotive body modules (non-safety), industrial counter/timer boards, and low-end consumer white-goods controllers. The wide operating voltage range and robust ESD/latch-up immunity make it a frequent choice for cost-driven replacement of older PIC16C5x designs.
When designing with this part, ensure the chosen programmer (such as MPLAB PM3 or ICD-type debuggers limited to OTP-emulator parts) supports 18-pin PIC16C OTP; emulation via PIC16C620A-20/JW ceramic-windowed units is the standard development flow. Decoupling should include a 100nF ceramic capacitor adjacent to VDD with a bulk 10uF tantalum or aluminum polymer near the supply pin.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone. XAIPART cross-references the Microchip cross-reference tool output with package data to identify pin-compatible drop-in replacements.
直接替换替代料： PIC16C620A-20I/P ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16C620A-20I/P （相同外形与封装尺寸） ——差异在于 RAM Size, Timers, Program Memory Type, Core Architecture, Package.
快速对比工具——选择替代料号进行并排对比：
PIC16C620A-20E/P
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC16C620A-20/P
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.55 / 个
查看数据手册 →PIC16F628A-I/P
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.62 / 个
查看数据手册 →PIC16C620A-04I/P
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC16C620-20I/P
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC16C620A-20I/P 最大额定值与电气特性
| Architecture | PIC 8-bit RISC (Harvard) |
| Core | PIC16C mid-range |
| Program Memory Type | OTP EPROM (One-Time-Programmable) |
| Program Memory Size | 896 B (512 x 14 words) |
| RAM Size | 96 B (96 x 8) |
| EEPROM Size | 0 B (no on-chip EEPROM) |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle | 200 ns at 20 MHz (100 ns instruction execution) |
| Instruction Set Size | 35 single-word instructions |
| I/O Pins | 13 |
| Timers | 2 x 8-bit + 1 x 16-bit (TMR0/TMR1/TMR2) |
| Analog Comparator | Yes (2 channels) |
| CCP Module | Yes (Capture/Compare/PWM) |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| Brown-out Reset | Yes |
| Power-on Reset | Yes |
| Operating Voltage | 2.5 V to 5.5 V |
| 工作温度 | -40 C to +85 C (Industrial) |
| 封装 | 18-pin PDIP (P) |
| 安装类型 | Through-Hole |
| Oscillator Type | External |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
PIC16C620A-20I/P 引脚配置
| 引脚 1 | RA2 — Bidirectional I/O port A, bit 2; analog comparator input |
| 引脚 2 | RA3 — Bidirectional I/O port A, bit 3; analog comparator input |
| 引脚 3 | RA4/T0CKI — Bidirectional I/O port A, bit 4; Timer0 clock input |
| 引脚 4 | MCLR — Master Clear (Reset) input, active low |
| 引脚 5 | VSS — Ground reference |
| 引脚 6 | RB0/INT — Bidirectional I/O port B, bit 0; external interrupt input |
| 引脚 7 | RB1 — Bidirectional I/O port B, bit 1 |
| 引脚 8 | RB2 — Bidirectional I/O port B, bit 2 |
| 引脚 9 | RB3 — Bidirectional I/O port B, bit 3 |
| 引脚 10 | RB4 — Bidirectional I/O port B, bit 4 |
| 引脚 11 | RB5 — Bidirectional I/O port B, bit 5 |
| 引脚 12 | RB6 — Bidirectional I/O port B, bit 6 |
| 引脚 13 | RB7 — Bidirectional I/O port B, bit 7 |
| 引脚 14 | VDD — Positive supply voltage (2.5V to 5.5V) |
| 引脚 15 | OSC2/CLKOUT — Oscillator output / clock output |
| 引脚 16 | OSC1/CLKIN — Oscillator input / external clock input |
| 引脚 17 | RA0 — Bidirectional I/O port A, bit 0; analog comparator input |
| 引脚 18 | RA1 — Bidirectional I/O port A, bit 1; analog comparator input |
典型应用
PIC16C620A-20I/P 适用于 6 应用s: Appliance Control Board, Lighting Ballast Controller, Security Sensor Interface, Industrial Counter / Timer Board, Automotive Body Module (Non-Safety), Low-End Consumer White-Goods Controller.
Appliance Control Board
The PIC16C620A-20I/P is well matched to white-goods appliance controllers such as washing-machine timers, dishwasher cycle controllers, and microwave user interfaces, where its 13 I/O pins can scan a 4x4 keypad matrix, drive a 7-segment LED display, and read multiple sensor lines through the on-chip analog comparator. At 20 MHz the 200 ns instruction cycle easily services polled keypad scan loops without flicker. Its wide 2.5V-5.5V supply tolerance lets it ride directly off rectified mains-derived rails without additional regulation. Compared to PIC16F successors the lower OTP unit cost saves 20-40 cents per board at high volume, justifying the lack of in-field updates for sealed assemblies.
推荐
Lighting Ballast Controller
For electronic fluorescent and LED ballast designs, the PIC16C620A-20I/P provides the timing precision and analog comparator inputs required for zero-cross detection and dimmer interface. The CCP module generates PWM at frequencies suitable for driving MOSFET gate drivers in constant-current LED ballasts. Its 20 MHz clock supports smooth 10-bit PWM at kilohertz rates with low jitter. The 2.5V-5.5V operating range accommodates both 5V analog and 3.3V logic domains on the same board. OTP programming locks the dimming curve at production, preventing field tampering with the lighting compensation.
推荐
Security Sensor Interface
PIR motion detectors, door/window reed switches, and glass-break sensors are typical PIC16C620A-20I/P applications, where the part's low power consumption, on-chip analog comparator for analog sensor front-ends, and watchdog timer for fail-safe operation deliver a complete subsystem. The 13 I/O pins interface multiple zones through one MCU. Industrial -40C to +85C temperature rating covers outdoor and unheated-indoor installations. OTP programming prevents reverse-engineering of proprietary detection algorithms, a security advantage. Compared to PIC16F solutions, OTP saves cost on high-volume disposable sensor units.
推荐
Industrial Counter / Timer Board
For conveyor counters, packaging-line timers, and machine-cycle monitors, the PIC16C620A-20I/P combines the 16-bit TMR1 timer for precise event counting with the 8-bit TMR0 for debounced digital input sampling. The CCP module in capture mode measures pulse widths on flowmeters and tachometers. Industrial temperature grade -40C to +85C supports factory-floor operation. The 18-pin PDIP through-hole package withstands vibration in machinery cabinets. Connect the MCU's MCLR pin through a 10 kohm pull-up and a 100 nF to ground for reliable reset.
推荐
Automotive Body Module (Non-Safety)
Non-safety body modules such as interior lighting controllers, seat-position memory, and rear-window defogger timers use the PIC16C620A-20I/P where its industrial -40C to +85C range covers most cabin environments. The 13 I/O pins multiplex with multiple switch inputs and relay-driver outputs. The analog comparator monitors battery voltage for low-voltage cutoff. Note that this part is NOT AEC-Q100 qualified; safety-critical modules must use automotive-graded MCUs such as PIC16F1823-I/P or PIC16F15323-I/P. OTP lock prevents unauthorized firmware modifications that could affect warranty and emissions behavior.
推荐
Low-End Consumer White-Goods Controller
Coffee makers, toaster ovens, rice cookers, and similar consumer white-goods use the PIC16C620A-20I/P for its low unit cost (under $2 at volume), adequate 8-bit performance for simple state machines, and reliable OTP firmware locking. The part's wide 2.5V-5.5V supply range lets it run directly off a rectified-transformer rail without a costly switching regulator. The 13 I/O pins drive button inputs, LED indicators, buzzer PWM tones, and triac-control outputs through optos. Compared to PIC16F flash parts the OTP lock prevents firmware theft by overseas clone makers, a critical IP protection benefit.
推荐
推荐产品汇总
工程参考数据： PIC16C620A-20I/P ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16C620A-20E/P | PIC16C620A-20/P | PIC16F628A-I/P | PIC16C620A-04I/P | PIC16C620-20I/P |
|---|---|---|---|---|---|---|
| Package | 18-pin PDIP (P) | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP EPROM 896 B | OTP EPROM 896 B | OTP EPROM 896 B | Flash 3.5 KB (+391%) | OTP EPROM 896 B | OTP EPROM 896 B |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz (-80%) | 20 MHz |
| RAM Size | 96 B | 96 B | 96 B | 224 B (+133%) | 96 B | 96 B |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +125C (Extended) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Operating Voltage | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 2.0V to 5.5V (wider) | 2.5V to 5.5V | 2.5V to 5.5V |
| I/O Pins | 13 | 13 | 13 | 16 (+3) | 13 | 13 |
| Internal Oscillator | No (external only) | No (external only) | No (external only) | Yes (4 MHz internal) | No (external only) | No (external only) |
关键差异点
- OTP EPROM provides firmware IP protection （对比 PIC16F628A-I/P)
- Lower unit cost at high volume than flash equivalents （对比 PIC16F628A-I/P)
- Industrial temperature range -40C to +85C （对比 PIC16C620A-20/P (Commercial))
设计说明
Estimated: Place a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 14) and a bulk 10 uF tantalum or aluminum-polymer capacitor on the supply node. The PIC16C620A-20I/P typically draws 5-15 mA at 20 MHz depending on I/O load; OTP programming pulses during production require a stable VDD within +/-10% to avoid programming errors. Brown-out reset (BOR) is enabled by configuration bit and should be left enabled in production to prevent code corruption during supply droops.
Do not confuse the PIC16C620A (this part) with the legacy PIC16C620 (pre-A revision): the A-revision improves brown-out behavior and analog comparator offset, and PIC16C620 code should be re-validated on PIC16C620A per the Microchip migration note. Also note that the -20I/P suffix indicates industrial temperature grade (-40C to +85C); using the -20/P commercial variant (0C to +70C) in an industrial environment voids reliability expectations.
The 18-pin PDIP through-hole footprint requires 0.100 inch (2.54 mm) pitch pads with 0.9 mm drill holes. Allow at least 1 mm annular ring and route all signals on inner layers if possible to keep the through-hole footprint clean. Place the MCLR pull-up resistor (10 kohm) and any debug-ICSP header adjacent to the MCU. Keep the oscillator crystal traces short and surrounded by a ground pour to avoid noise injection into the 20 MHz clock.
The PIC16C620A-20I/P in PDIP package has typical theta_JA around 70 C/W in still air. At maximum 20 MHz operation with all I/O switching, total dissipation stays below 100 mW, giving junction rise under 10 C above ambient - no heatsink required. In enclosed appliances above 60 C ambient, verify junction temperature stays below 125 C by derating clock frequency or reducing I/O toggle rate.
合规信息
RoHS compliant per Microchip product page and DigiKey listing. NOT AEC-Q100 qualified - for safety-critical automotive modules use PIC16F1823-I/P or PIC16F15323-I/P. Lead-free matte-tin plating on PDIP leads.