PIC16C71-20I/P - 8-Bit OTP MCU, 1.75KB, 20MHz, 18-PDIP | Microchip
MPN： PIC16C71-20I/P ✗ 停產PIC16C71-20I/P 概覽
A PIC microcontroller is a compact Reduced Instruction Set Computing (RISC) processor that integrates CPU, RAM, non-volatile program memory, and peripherals onto a single CMOS die. PIC16C-series devices sit in the 8-bit MCU product hierarchy (PIC10/PIC12/PIC16/PIC18), belong to the broader category of microcontrollers and microcontrollers/MCUs, and ultimately fall under the system-level class of embedded controllers in power management, motor control, and signal acquisition subsystems. The PIC16C71 was Microchip's first PIC16 family member to integrate an on-chip ADC, enabling single-chip sensor-interface designs.
The PIC16C71-20I/P executes a single 14-bit instruction word in 200ns at 20MHz and features only 35 single-word instructions, which simplifies code generation. The four-channel 8-bit successive-approximation ADC allows direct interface with analog sensors such as thermistors, potentiometers, or bridge outputs. Brown-out reset protects against code corruption during supply dips, and the 13 individually-direction-controlled I/O pins drive LEDs, keypads, low-side FETs, or UART/I2C bit-banged peripherals.
Typical applications include low-cost 8-bit embedded control, sensor front-ends, industrial appliance controllers, and battery-powered instrument readouts. For each of these use cases the integrated ADC, low part count, and through-hole PDIP footprint favor hand-soldered prototypes and educational platforms where ease of reprogramming and breadboard compatibility outweigh the need for in-system flash updates.
When designing with the PIC16C71-20I/P, verify that the chosen compiler toolchain (MPLAB XC8 legacy mode, CCS, or Hi-Tech PICC) supports the OTP EPROM variant, and ensure that the ICSP programming header is brought out to allow device programming after PCB assembly. The OTP memory can be programmed only once, so plan development iterations using a windowed (JW) or flash-based PIC16F equivalent first.
This page synthesizes distributor pricing, drop-in alternatives within the same 18-PDIP footprint, and practical design notes not assembled in any single manufacturer datasheet.
直接替換替代品，適用於 PIC16C71-20I/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： PIC16C71-20I/P （相同外形與佔位） — 差異在於 Mounting Type, Package, Timers, Brown-out Reset (BOR), Core Architecture.
PIC16C711-20I/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C710-20I/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C71-20/P
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC16C71-20I/SO
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F716-I/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16C71-20I/P 最大額定值與電氣特性
| Core Architecture | PIC16C 8-bit RISC |
| Program Memory Size | 1.75 KB (1K x 14) OTP EPROM |
| RAM Size | 36 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Instruction Set Size | 35 single-word instructions |
| ADC | 4 channels x 8-bit successive approximation |
| Timers | 1 x 8-bit Timer0 with 8-bit prescaler |
| I/O Pins | 13 with individual direction control |
| Brown-out Reset (BOR) | Yes |
| Watchdog Timer | Yes |
| Operating Voltage | 3.0 V to 5.5 V |
| 工作溫度 | -40 C to +85 C (Industrial) |
| 封裝 | 18-pin PDIP (0.300 inch, 7.62mm) |
| 安裝類型 | Through Hole |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
| MSL 等級 | 1 (unlimited floor life) |
PIC16C71-20I/P 腳位配置
| 腳位 1 | RA2/AN2 — PORTA bit 2 / ADC channel 2 input |
| 腳位 2 | RA3/AN3 — PORTA bit 3 / ADC channel 3 input |
| 腳位 3 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input (open-drain) |
| 腳位 4 | MCLR — Master Clear (active-low reset input) |
| 腳位 5 | VSS — Ground reference |
| 腳位 6 | RB0/INT — PORTB bit 0 / external interrupt input |
| 腳位 7 | RB1 — PORTB bit 1 digital I/O |
| 腳位 8 | RB2 — PORTB bit 2 digital I/O |
| 腳位 9 | RB3 — PORTB bit 3 digital I/O |
| 腳位 10 | RB4 — PORTB bit 4 digital I/O |
| 腳位 11 | RB5 — PORTB bit 5 digital I/O |
| 腳位 12 | RB6 — PORTB bit 6 digital I/O |
| 腳位 13 | RB7 — PORTB bit 7 digital I/O |
| 腳位 14 | VDD — Positive supply (3.0V to 5.5V) |
| 腳位 15 | OSC2/CLKOUT — Oscillator crystal connection 2 / clock output |
| 腳位 16 | OSC1/CLKIN — Oscillator crystal connection 1 / external clock input |
| 腳位 17 | RA0/AN0 — PORTA bit 0 / ADC channel 0 input |
| 腳位 18 | RA1/AN1 — PORTA bit 1 / ADC channel 1 input |
典型應用
PIC16C71-20I/P 適用於 7 應用s: 8-Bit Sensor Interface with ADC, Industrial Appliance Controller, Battery-Powered Instrument Readout, Educational Microcontroller Platform, Automotive Aftermarket Accessory Controller, Hobbyist and Maker Projects, Replacement of Obsolete PIC16C5X Designs.
8-Bit Sensor Interface with ADC
The PIC16C71-20I/P is well matched to 8-bit sensor-interface designs where 4 ADC channels are sufficient and a through-hole footprint simplifies prototyping. The 20MHz CPU delivers a 200ns instruction cycle, allowing the ADC acquisition loop to run with minimal latency. With 1.75KB of OTP program memory and 36 bytes RAM, the part comfortably runs a polled sensor-read sequence plus UART bit-bang output. Compared to discrete ADC-plus-logic designs, integrating the ADC on-chip reduces BOM count and PCB area.
推薦
Industrial Appliance Controller
The PIC16C71-20I/P suits low-cost industrial appliance controllers such as pump drivers, fan controllers, and small heating elements. Its industrial -40C to +85C temperature range and brown-out reset ensure robust operation in factory environments with noisy supply rails. The 13 I/O pins drive relays, low-side MOSFETs, status LEDs, and keypad matrices. The 20MHz CPU executes the control loop fast enough for a 1ms PID cycle, leaving margin for display and button-scan tasks.
推薦
Battery-Powered Instrument Readout
The PIC16C71-20I/P is a good fit for battery-powered handheld instruments like multimeters, thermometers, and portable data loggers where the integrated 4-channel ADC directly digitizes sensor outputs. The PIC16C core's low-power sleep mode combined with the 3.0V to 5.5V operating range enables single-coin-cell or 2xAA designs. Brown-out reset prevents data corruption when batteries sag, and the 8-bit Timer0 drives a low-power RTC tick. Total BOM cost stays low because the MCU needs no external ADC or reset supervisor.
推薦
Educational Microcontroller Platform
The PIC16C71-20I/P serves as an educational platform for teaching 8-bit embedded design because the 18-PDIP through-hole package is breadboard-friendly and hand-solderable. Students can program the OTP device via Microchip's PICSTART Plus or ICD2 programmers and observe the 35-instruction RISC architecture in action. The 4 ADC channels introduce ADC concepts such as acquisition time and reference selection. While OTP restricts reuse, the PIC16C71-20I/P remains in stock for laboratory course consumables.
推薦
Automotive Aftermarket Accessory Controller
The PIC16C71-20I/P fits automotive aftermarket accessory controllers such as alarm LED drivers, lighting sequencers, and auxiliary fan controllers. Although the standard -40C to +85C industrial grade does not cover AEC-Q100 automotive qualification, it remains in widespread use in non-safety-critical aftermarket products. The 13 I/O pins drive relays, LEDs, and the brown-out reset handles crank-dip transients when paired with a TVS-protected 12V supply rail.
推薦
Hobbyist and Maker Projects
The PIC16C71-20I/P remains popular among hobbyists and makers building retro 8-bit projects, custom MIDI controllers, and discrete Christmas light sequencers. The PDIP package accepts standard IC sockets, and the part's instruction cycle is fast enough to bit-bang WS2812 addressable RGB LEDs with timing margins that satisfy the datasheet's reset low-time requirement. Combined with the integrated ADC, the chip can read potentiometers and pushbuttons while driving PWM-emulated LED dimming via Timer0 ISR.
推薦
Replacement of Obsolete PIC16C5X Designs
The PIC16C71-20I/P serves as a drop-in upgrade path for legacy designs based on the older PIC16C5X family, offering more program memory (1.75KB vs 0.5-1KB), an integrated ADC, brown-out reset, and 13 I/O pins. The PIC16C7X is upwards source-code compatible with the PIC16C5X and PIC12Cxxx instruction set, so existing assembly code typically recompiles with only minor modifications. Engineers modernizing legacy equipment can swap the chip without re-laying out the PCB.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C71-20I/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 | PIC16C711-20I/P | PIC16C710-20I/P | PIC16F716-I/P |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-PDIP (0.300 inch) | 18-PDIP (0.300 inch) - same | 18-PDIP (0.300 inch) - same | 18-PDIP (0.300 inch) - same |
| Program Memory | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP | 0.875 KB (512 x 14) OTP | 14 KB Flash |
| RAM | 36 bytes | 68 bytes | 36 bytes | 128 bytes |
| ADC Channels | 4 x 8-bit | 6 x 8-bit | 4 x 8-bit | 8 x 8-bit |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 13 | 13 | 13 | 13 |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | Flash (reprogrammable) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
主要差異化特點
- First PIC16 family member with integrated ADC (對比PIC16C56 / PIC16C58)
- Industrial -40C to +85C temperature range (對比PIC16C71-20/P (commercial grade))
- Brown-out reset for supply-dip immunity (對比Discreet MCU with external supervisor)
設計說明
The PIC16C71-20I/P uses OTP EPROM and can be programmed only once. Engineers must validate code on a windowed PIC16C71/JW or a flash-based PIC16F716-I/P development board before committing production units. Estimating: at typical development cycle cost of $20 per blank PIC16C71-20I/P, validation errors late in the design can add $500-$2000 to development budgets. Always use ICSP headers to allow post-assembly programming for the OTP device.
The PIC16C71-20I/P operates from 3.0V to 5.5V with brown-out reset protecting against code corruption at supply dips below 4.0V (typical BOR threshold). For battery applications, an MCP1700 LDO is recommended because of its 1.6 microamp quiescent current. Estimated: at 5V and 20MHz active mode the part draws approximately 5-10mA, dropping to under 1 microamp in sleep mode. Add a 100nF decoupling capacitor directly across VDD and VSS pins 14 and 5.
Place the oscillator crystal or resonator within 0.5 inch of pins 15 (OSC2/CLKOUT) and 16 (OSC1/CLKIN) and guard the traces with a ground ring to reduce EMI susceptibility. The 18-PDIP package has long through-hole leads that add parasitic inductance, so keep ADC analog traces away from digital switching lines. The MCLR pin (pin 4) requires a 10k pull-up to VDD and a 100nF decoupling capacitor for reliable reset behavior during power-up.
合規資訊
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - the industrial grade -40C to +85C range is not equivalent to automotive certification. Halogen-free status not explicitly stated in retrieved product data.
