PIC16LC71-04I/SO - 4MHz 8-Bit OTP MCU 1.75KB | Microchip
MPN: PIC16LC71-04I/SO ✓ Hoạt độngPIC16LC71-04I/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, I/O peripherals, and timers. The PIC16C7X family is a mid-range architecture from Microchip, built around a RISC Harvard CPU with a 14-bit instruction word. PIC microcontrollers sit within the broader 8-bit MCU category alongside 8051 and AVR, and are widely used in low-cost, low-power applications such as appliance controls, sensor interfaces, and battery-powered instruments where an integrated ADC simplifies analog front-end design.
Key features of the PIC16LC71-04I/SO include a Timer0 8-bit timer/counter with 8-bit prescaler, brown-out reset (BOR) circuitry for safe supply-voltage monitoring, a watchdog timer, and an integrated 8-bit multichannel A/D converter that eliminates the need for an external ADC IC. The on-chip oscillator supports various clocking modes including RC and crystal, enabling BOM reduction.
The device uses CMOS static design, so it operates over the full 0 to 4MHz clock range across the rated supply voltage. The Harvard bus architecture separates program memory (14-bit wide) from data memory (8-bit wide RAM), accessed via separate buses, which improves throughput compared with von Neumann designs. The OTP program memory is one-time programmable for production units, while windowed CERDIP variants (PIC16C71) support UV-eraseable prototyping.
Typical applications include appliance controls, automotive body electronics, sensor signal conditioning with on-chip ADC, low-cost remote controls, and battery-powered instrumentation. The integrated ADC with 13 I/O pins allows a complete sensor interface plus actuator drive within a single 18-pin SOIC, replacing discrete ADC plus logic designs.
When designing with this part, allocate sufficient decoupling (100nF plus bulk) close to VDD and VSS, keep ADC analog traces short, and respect the absolute maximum supply of 7V. Program memory is OTP - firmware must be fully verified on windowed (JW) or UV-erasable (PIC16C71) parts before committing to OTP for production.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone - including pin-compatible same-family replacements and parametric guidance for engineering selection.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC71-04I/SO — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16LC71-04I/SO (cùng hình factor và footprint) — khác nhau ở Timers, Package, Program Memory Type, ADC, Core Architecture.
PIC16LC71-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC71-04I/P
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C71-04/SO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F716-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC716-04I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F84A-I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC71-04I/SO Tỷ lệ tối đa & tính chất điện
| Family | PIC16C7X (mid-range 8-bit) |
| Core Architecture | 8-bit RISC Harvard (14-bit instruction word) |
| Program Memory Size | 1.75 KB (1K x 14) OTP |
| Data RAM | 36 bytes |
| Maximum Clock Speed | 4 MHz |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Number of I/O Pins | 13 |
| On-chip ADC | 8-bit, 4-channel |
| Timers | Timer0 (8-bit with 8-bit prescaler), WDT |
| Brown-out Reset (BOR) | Yes |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| Package Type | 18-SOIC (SOIC-18) |
| Kiểu lắp đặt | Surface Mount |
| Oscillator Modes | RC, XT, LP, HS (external clock/crystal) |
| Program Memory Type | One-Time Programmable (OTP) EPROM |
Cấu hình chân PIC16LC71-04I/SO
| Chân 1 | /MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / ADC input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / ADC input 1 |
| Chân 4 | RA2/AN2 — PORTA bit 2 / ADC input 2 |
| Chân 5 | RA3/AN3/VREF — PORTA bit 3 / ADC input 3 / ADC reference voltage |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | VDD — Positive supply voltage |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC2/CLKOUT — Oscillator crystal output / Clock output |
| Chân 10 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Chân 11 | RC0 — PORTC bit 0 |
| Chân 12 | RC1 — PORTC bit 1 |
| Chân 13 | RC2 — PORTC bit 2 |
| Chân 14 | RC3 — PORTC bit 3 |
| Chân 15 | RC4 — PORTC bit 4 |
| Chân 16 | RC5 — PORTC bit 5 |
| Chân 17 | RC6 — PORTC bit 6 |
| Chân 18 | RC7 — PORTC bit 7 |
Ứng dụng tiêu biểu
PIC16LC71-04I/SO phù hợp cho 6 Áp dụngs: Appliance Control Front-Ends, Battery-Powered Sensor Instruments, Automotive Body Electronics (Non-Safety), Remote Control and IR Transmitter/Receiver, Industrial Sensor Signal Conditioning, Simple LED Display and Indicator Controllers.
Appliance Control Front-Ends
The PIC16LC71-04I/SO fits appliance control front-ends where a small 8-bit MCU must read sensors and drive actuators within tight BOM cost. Its integrated 8-bit 4-channel ADC directly digitizes temperature, humidity, or pressure sensors without an external ADC IC, and the 13 GPIO pins drive relays, triacs, LED indicators, or buzzer PWM. The 2.5V-5.5V supply range matches both 3.3V and 5V designs. Industrial -40C to +85C temperature grade supports kitchen, laundry, and HVAC equipment environments. The OTP program memory suits high-volume, firmware-finalized production runs where unit cost dominates over reprogrammability.
Được đề xuất
Battery-Powered Sensor Instruments
Low-power CMOS static operation makes the PIC16LC71-04I/SO a fit for battery-powered sensor instruments where sleep-mode current and ADC-driven duty-cycled measurements dominate the energy budget. The integrated 8-bit ADC captures ratiometric sensor outputs, while brown-out reset (BOR) protects against low-battery brown-out conditions on lithium or alkaline cells. The 2.5V minimum supply operates directly from two AA cells, and the 36-byte RAM is sufficient for short sensor bursts. Industrial temperature range supports outdoor or garage installations. Replacement of a discrete ADC-plus-logic design with this single-chip MCU reduces quiescent current and PCB area.
Được đề xuất
Automotive Body Electronics (Non-Safety)
For non-safety automotive body electronics such as interior lighting controllers, seat-position memories, or simple dashboard switch readers, the PIC16LC71-04I/SO delivers industrial-grade temperature tolerance and an integrated 8-bit ADC. The 13 I/O pins support direct switch-matrix reading and LED driver outputs. However, this is NOT AEC-Q100 qualified - it is intended for non-critical body applications only. The brown-out reset feature is critical for automotive supply transients. OTP memory locks in production firmware; for development, the PIC16F716-I/SO Flash variant is recommended as a pin-compatible alternative.
Được đề xuất
Remote Control and IR Transmitter/Receiver
Cost-sensitive IR remote controls and receivers benefit from the PIC16LC71-04I/SO's small footprint and integrated ADC. The 4MHz clock and RISC core handle standard RC5/RC6 or NEC protocol encoding/decoding in software. The Timer0 with 8-bit prescaler provides accurate carrier-frequency generation (typically 36-40 kHz) for IR modulation. Industrial temperature grade supports outdoor or garage-door applications. The 13 GPIO pins drive IR LEDs, status indicators, and read button matrices. Low BOM cost (one MCU, one IR LED, one receiver module) enables sub-$2 remote designs.
Được đề xuất
Industrial Sensor Signal Conditioning
Industrial 4-20mA loop-powered sensor transmitters and bridge-sensor signal conditioners use the PIC16LC71-04I/SO to digitize low-level analog signals via its 8-bit 4-channel ADC. The MCU scales, linearizes, and outputs the measurement digitally or via PWM-to-voltage conversion. Industrial -40C to +85C operation handles factory floor environments. The integrated BOR protects against supply droop on long industrial cables. The OTP memory locks in factory calibration coefficients, and the 36-byte RAM is sufficient for short linearization lookup tables.
Được đề xuất
Simple LED Display and Indicator Controllers
Cost-driven LED indicator boards and small 7-segment displays use the PIC16LC71-04I/SO to multiplex LEDs and read user inputs. The 13 GPIO pins support up to 8-segment plus 5-digit direct drive, or larger matrices via external drivers. Timer0 generates display-refresh interrupts. The integrated ADC is unused in pure digital display designs but available for ambient-light sensing or potentiometer input. Industrial temperature supports outdoor signage. The compact 18-SOIC package fits small form-factor controller PCBs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC71-04I/SO — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16LC71-04/SO | PIC16LC71-04I/P | PIC16C71-04/SO | PIC16F716-I/SO | PIC16LC716-04I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC | 18-SOIC (same) | 18-PDIP (THT, same pinout) | 18-SOIC (same) | 18-SOIC (same) | 18-SOIC (same) |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB EPROM (UV-erasable) | 2 KB Flash | 1.75 KB OTP/EPROM |
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 3.0 V to 6.0 V (PIC16C standard) | 2.0 V to 5.5 V (F-series) | 2.5 V to 5.5 V |
| Temperature Range | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) | -40 C to +85 C | 0 C to +70 C | -40 C to +85 C | -40 C to +85 C |
| On-chip ADC | 8-bit, 4-ch | 8-bit, 4-ch | 8-bit, 4-ch | 8-bit, 4-ch | 8-bit, 4-ch + enhanced | 8-bit, 4-ch |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | Windowed EPROM | Flash | OTP EPROM |
Bảo phân biệt quan trọng
- Industrial temperature grade with OTP memory (vsPIC16LC71-04/SO)
- Lower unit cost than Flash alternatives (vsPIC16F716-I/SO)
- Integrated 8-bit ADC eliminates external ADC (vsPIC16F84A-I/SO)
Ghi chú thiết kế
Decouple VDD (pin 14) with a 100nF ceramic capacitor placed within 5mm of the pin, plus a 10uF bulk capacitor near the supply entry. The PIC16LC71-04I/SO can operate down to 2.5V, but at low VDD the ADC reference range shrinks proportionally - design sensor excitation to match the supply headroom. The brown-out reset (BOR) module should be enabled in config fuses to protect against supply droop, especially in industrial 24V-bus-derived rails.
Keep ADC analog traces (RA0-RA3) short and isolated from digital switching traces. Place the VDD decoupling first, then the analog reference capacitor on RA3/VREF if used, then the analog input traces. The 18-SOIC package has standard 1.27mm pin pitch - follow JEDEC SOIC-18 land pattern recommendations. Avoid running high-current traces under or near the IC to minimize digital switching noise coupling into ADC readings.
OTP program memory cannot be erased - any code bug ships in every unit. Always validate firmware on a windowed PIC16C71-04/JW or PIC16F716-I/SO Flash variant before committing to PIC16LC71-04I/SO for production. The /MCLR pin (pin 1) requires a 10kohm pull-up to VDD; if left floating, the device will reset intermittently. Ensure the configuration fuses are set correctly - especially the watchdog timer (WDT) and oscillator mode - because wrong fuse values can lock the device.
Thông tin tuân thủ
RoHS/REACH compliance for PIC16LC71-04I/SO not explicitly listed in the verified distributor data - [DATA_NEEDED]. AEC-Q100 not applicable (no automotive qualification for this legacy PIC16C7x OTP family). Conflict-minerals compliance declared by Microchip per standard policy.