PIC16C662-20I/P - 7KB OTP 8-bit MCU, 33 I/O, DIP-40 | Microchip
MPN： PIC16C662-20I/P ✓ 啟用中PIC16C662-20I/P 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, I/O peripherals, and often analog or communication blocks. The PIC16C family represents Microchip's mid-range 8-bit architecture, sitting between the baseline PIC10/12/16 series and higher-pin-count PIC17/18 devices. Within the broader taxonomy, MCUs form a category of microprocessors -> semiconductors -> integrated circuits. The OTP (One-Time Programmable) EPROM program memory offers lower unit cost than windowed or flash parts in mature production runs, at the trade-off of not being erasable.
Key features include 33 bidirectional I/O lines, 8-bit data width, internal oscillator support options, two 8-bit timers and one 16-bit timer, a synchronous serial port (SSP) for SPI/I2C, a parallel slave port, two analog comparators, and a programmable watchdog timer. The Harvard architecture separates program (14-bit instruction width) and data (8-bit) buses, allowing instruction fetch and operand access in the same cycle.
Typical applications include industrial process controllers, appliance control boards, automotive body and HVAC modules, sensor signal conditioning, motor control, and embedded operator interfaces. Its high I/O count (33) and integrated analog comparators also suit battery management and power-conversion supervisory tasks in legacy designs.
When designing with this part, note that OTP memory requires device programming before PCB soldering for production runs; consider the flash-based PIC16F877A or PIC16F887 as reprogrammable substitutes on the same 40-pin PDIP footprint if field updates are needed.
This page synthesizes distributor pricing tiers, drop-in same-family alternatives, and practical design notes that go beyond the manufacturer datasheet.
直接替換替代品，適用於 PIC16C662-20I/P — 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： PIC16C662-20I/P （相同外形與佔位） — 差異在於 Package, Mounting Type, RoHS Status, Maximum Clock Frequency, Program Memory Type.
PIC16F877A-I/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16F887-I/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C662-04I/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C662-10/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C65B-20I/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C64A-20I/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C662-20I/P 最大額定值與電氣特性
| Architecture | 8-bit RISC (PIC16C mid-range) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB |
| Instruction Word Width | 14-bit |
| RAM | 176 bytes |
| I/O Pins | 33 |
| Clock Speed (max) | 20 MHz |
| Instruction Cycle | 200 ns |
| Instruction Set Size | 35 instructions |
| 供應電壓 | 4.5 V to 5.5 V |
| 工作溫度 | -40C to +85C (Industrial) |
| 封裝 | 40-pin PDIP (DIP-40, 0.600") |
| 安裝類型 | Through-Hole |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Analog Comparators | 2 |
| Serial Interface | SSP (SPI/I2C) |
| Watchdog Timer | Yes |
PIC16C662-20I/P 腳位配置
| 腳位 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| 腳位 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| 腳位 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| 腳位 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| 腳位 5 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / voltage reference |
| 腳位 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 腳位 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SSP slave select |
| 腳位 8 | RE0/RD — PORTE bit 0 / parallel slave port read |
| 腳位 9 | RE1/WR — PORTE bit 1 / parallel slave port write |
| 腳位 10 | RE2/CS — PORTE bit 2 / parallel slave port chip select |
| 腳位 11 | VDD — Positive supply voltage 5V |
| 腳位 12 | VSS — Ground |
| 腳位 13 | OSC1/CLKIN — Oscillator input / external clock |
| 腳位 14 | OSC2/CLKOUT — Oscillator output |
| 腳位 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock in |
| 腳位 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| 腳位 17 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| 腳位 18 | RC3/SCK/SCL — PORTC bit 3 / SSP clock |
| 腳位 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| 腳位 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| 腳位 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| 腳位 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| 腳位 23 | RC4/SDI/SDA — PORTC bit 4 / SSP data in |
| 腳位 24 | RC5/SDO — PORTC bit 5 / SSP data out |
| 腳位 25 | RC6/TX/CK — PORTC bit 6 / USART TX |
| 腳位 26 | RC7/RX/DT — PORTC bit 7 / USART RX |
| 腳位 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| 腳位 28 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| 腳位 29 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| 腳位 30 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| 腳位 31 | VSS — Ground |
| 腳位 32 | VDD — Positive supply voltage 5V |
| 腳位 33 | RB0/INT — PORTB bit 0 / external interrupt |
| 腳位 34 | RB1 — PORTB bit 1 |
| 腳位 35 | RB2 — PORTB bit 2 |
| 腳位 36 | RB3/PGM — PORTB bit 3 / LVP programming |
| 腳位 37 | RB4 — PORTB bit 4 |
| 腳位 38 | RB5 — PORTB bit 5 |
| 腳位 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 腳位 40 | RB7/PGD — PORTB bit 7 / ICSP data |
典型應用
PIC16C662-20I/P 適用於 6 應用s: Industrial Process Controller, Appliance Control Board (Washer / Oven / HVAC), Sensor Signal Conditioning Hub, Battery Management Supervisory Node, Operator Interface / HMI Panel, Educational / Legacy Embedded Trainer.
Industrial Process Controller
The PIC16C662-20I/P fits industrial process controllers with 33 I/O pins to read limit switches, drive relay coils, and interface with 4-20 mA loops via the two on-chip analog comparators. Operating at 20 MHz (200 ns instruction cycle), it samples inputs fast enough for PID loops with millisecond update rates while the industrial -40C to +85C temperature grade tolerates factory-floor environments. Place the MCU near optocouplers and TVS arrays; route the SSP (SPI/I2C) lines to local EEPROM for parameter storage. Compared with a 16-bit MCU it offers lower BOM cost and simpler toolchain.
推薦
Appliance Control Board (Washer / Oven / HVAC)
The PIC16C662-20I/P is well-suited to white-goods control boards where its 33 I/O lines drive keypads, 7-segment displays, triac-fired heater elements, and door-lock solenoids. The 4.5-5.5V supply range aligns with rectified 5V rails, and OTP memory locks firmware against field tampering - reducing warranty cost in high-volume appliance production. Three timers (2x 8-bit, 1x 16-bit) generate the PWM and time-base interrupts for closed-loop temperature control. The SSP supports EEPROM and RTC chips via I2C for schedule storage.
推薦
Sensor Signal Conditioning Hub
The PIC16C662-20I/P's two on-chip analog comparators make it a practical front-end for sensor conditioning - thresholding thermocouple, NTC, or Hall-effect signals before digital readouts. With 20 MHz clock and 200 ns instruction cycle, the MCU executes averaging and linearization routines on multiple sensor channels in real time, while the SSP streams results over SPI to a host controller or display. Industrial temperature range ensures reliable operation in field-deployed sensor nodes. The 40-pin PDIP package suits hand-soldered prototype installations.
推薦
Battery Management Supervisory Node
In battery management systems the PIC16C662-20I/P acts as a low-cost supervisory MCU monitoring cell voltages via analog comparators and toggling balancing MOSFETs through its 33 I/O pins. Operating from a 5V rail derived from the battery stack, the part draws microamp-level sleep currents when idle, preserving pack energy. The 35-instruction RISC core is well-documented in legacy designs, simplifying safety certification for industrial UPS and e-bike battery packs. Note that OTP memory complicates late-stage firmware fixes - design accordingly.
推薦
Operator Interface / HMI Panel
The PIC16C662-20I/P drives small operator interface panels - keypad scanning, LCD driving via parallel port, and LED status indication. With 33 I/O lines the MCU handles a 4x4 matrix keypad, a 16x2 character LCD, eight status LEDs, and a beeper without external I/O expanders. The 200 ns instruction cycle scans keypads faster than human perception (<10 ms response), while the SSP interfaces to a remote PLC for status updates. Through-hole PDIP simplifies hand assembly for low-volume HMI units.
推薦
Educational / Legacy Embedded Trainer
The PIC16C662-20I/P serves educational labs teaching PIC assembly and C programming on a 40-pin PDIP breadboard-friendly footprint. With only 35 instructions and abundant I/O, students learn timers, interrupts, and serial protocols hands-on. The 20 MHz speed is forgiving for educational timing experiments, and the OTP memory caveat introduces real-world design considerations around firmware versioning. The PIC16F877A-I/P is the recommended upgrade for classroom kits requiring flash reprogramming.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C662-20I/P — 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 | PIC16F877A-I/P | PIC16F887-I/P | PIC16C662-04I/P | PIC16C662-10/P | PIC16C65B-20I/P |
|---|---|---|---|---|---|---|
| Package | 40-pin PDIP (DIP-40) | 40-pin PDIP (DIP-40) - same | 40-pin PDIP (DIP-40) - same | 40-pin PDIP (DIP-40) - same | 40-pin PDIP (DIP-40) - same | 40-pin PDIP (DIP-40) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP EPROM (7 KB) | Flash (14 KB) | Flash (14 KB) | OTP EPROM (7 KB) | OTP EPROM (7 KB) | OTP EPROM (7 KB) |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 4 MHz (-80%) | 10 MHz (-50%) | 20 MHz |
| I/O Pins | 33 | 33 | 36 | 33 | 33 | 33 |
| ADC | None (comparators only) | 8-ch 10-bit | 14-ch 10-bit | None (comparators only) | None (comparators only) | None (comparators only) |
| Supply Voltage | 4.5V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) |
| Approx. Qty-1 Price | $8.20 | $7.50 (active, lower) | $6.80 (active, lower) | $7.90 | $7.60 | $8.40 |
主要差異化特點
- Flash memory for in-field firmware updates vs OTP lock (對比PIC16F877A-I/P)
- Integrated 10-bit ADC vs analog comparators only (對比PIC16F887-I/P)
- Lower cost per unit in mature production (對比PIC16C662-04I/P)
- Wide supply voltage compatibility for modern designs (對比PIC16C662-10/P)
設計說明
Place a 0.1 uF decoupling capacitor within 5 mm of each VDD pin (11 and 32) and a single 10 uF bulk capacitor near the MCU supply input. The PIC16C662-20I/P has two VDD/VSS pairs on opposite sides of the package - both must be connected. A 100 nF capacitor on MCLR (pin 1) improves reset noise immunity; pull MCLR high through a 10 kohm resistor to VDD.
The OTP (One-Time Programmable) program memory cannot be erased - any firmware bug becomes a permanent defect in production. Burn a windowed or flash-based PIC16F equivalent during prototyping and qualification, then lock down the OTP PIC16C662 only after firmware is fully validated. Use Microchip's ICD or REAL ICE for in-circuit debugging of the flash equivalent before committing to OTP.
The 20 MHz oscillator input (OSC1, pin 13) is sensitive to capacitive loading - keep the crystal or resonator within 10 mm of the MCU and route the traces over a continuous ground plane. For EMI-sensitive applications, add a series 10-33 pF trimmer on OSC2 to pull the frequency precisely to 20 MHz. The HS oscillator mode requires a 1 kohm feedback resistor across OSC1/OSC2 for stable operation.
Estimated: At 20 MHz clock and 5V supply with all 33 I/O pins toggling, the PIC16C662-20I/P draws approximately 20 mA active (per datasheet typical curves) - resulting in 100 mW dissipation. The 40-pin PDIP has a theta_JA of approximately 50 C/W, yielding a 5C junction rise above ambient. No heatsink is required, but ensure ambient airflow is adequate in enclosed industrial enclosures.
Brown-out reset is not enabled by default on the PIC16C662 - configure the BOREN bit in the configuration word to enable it for industrial environments where 5V rails may dip during motor inrush. The 4.5V minimum supply spec is tight; add a 100 uF bulk capacitor if the design shares the 5V rail with high-current loads. The on-chip watchdog timer (WDT) should be enabled for unattended industrial controllers.
合規資訊
RoHS and REACH compliant per Microchip product declaration. Not AEC-Q100 qualified - not suitable for automotive safety-critical applications. Lead-free and halogen-free packaging per Microchip environmental compliance data.
