PIC16C71-04/SO - 8-bit OTP MCU, 4MHz, 1.75KB, ADC | 18-SOIC
MPN: PIC16C71-04/SO ✗ Cuối đờiPIC16C71-04/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, RAM, and peripherals. The PIC16C71 belongs to Microchip's mid-range 8-bit architecture, which uses a 14-bit instruction word with only 35 single-word instructions, making it easy to program in assembly while offering enough performance for embedded control. As an OTP-EPROM device, it is intended for low-to-medium volume production where flash reprogrammability is not required, typically industrial, appliance, automotive aftermarket, and consumer applications where cost dominates over in-field reprogrammability. PIC16C71 parts have been superseded in many designs by flash-based PIC16F equivalents.
The PIC16C71-04/SO delivers 200ns instruction execution at 4MHz clock input, true 8-bit arithmetic, hardware stack, watchdog timer, power-on reset, and the integrated 4-channel 8-bit ADC — a notable integration feature for a mid-1990s 8-bit MCU. Brown-out detection prevents code corruption at falling supply voltages, while the 13 I/O pins each carry individual TRIS direction control for mixed input/output bus designs. Device current is held below 2 mA typical at 5V/4MHz, and the part operates across the commercial 0C to +70C range (industrial -40C to +85C versions available separately).
Typical applications include entry-level A/D conversion in automotive sensors, industrial control panels, appliance user interfaces, and low-cost consumer electronics. The on-chip ADC eliminates an external converter and reduces BOM cost in measurement and monitoring designs. Designers should note that the PIC16C71-04 family has been surpassed by flash-based PIC16F devices; for new designs, the PIC16F818/819/716 are commonly cited pin-compatible flash replacements with backward-compatible ADC code paths.
Bộ thay thế dễ dàng lắp đặt cho PIC16C71-04/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 PIC16C71-04/SO (cùng hình factor và footprint) — khác nhau ở Timers, Program Memory Size, Core Architecture, Package, Watchdog Timer.
PIC16C71T-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C71-04S/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F71-04/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F818-04/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C710-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C711-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C71-04/SO Tỷ lệ tối đa & tính chất điện
| Family | PIC16CXX mid-range |
| Core | 8-bit PIC |
| Instruction Set Width | 14-bit |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 1.75 KB (1K x 14) |
| Data RAM | 36 bytes |
| Tần số xung maksimum | 4 MHz |
| Instruction Execution Time | 200 ns |
| Number of I/O Pins | 13 |
| ADC Channels | 4 |
| ADC Resolution | 8-bit |
| Timers | 1 x 8-bit (Timer0 with 8-bit prescaler) |
| Brown-out Reset (BOR) | Yes |
| Watchdog Timer | Yes |
| Power-on Reset | Yes |
| Điện áp cung cấp hoạt động | 5 V (4.5 V to 5.5 V) |
| Điện áp cung cấp | < 2 mA typical at 5 V / 4 MHz |
| Khoảng nhiệt độ hoạt động | 0C to +70C (commercial) |
| Hộp | 18-SOIC (7.50 mm width, /SO suffix) |
| Kiểu lắp đặt | Surface Mount |
| Số chân | 18 |
| Instruction Count | 35 single-word instructions |
Cấu hình chân PIC16C71-04/SO
| Chân 1 | RA2/AN2 — Bidirectional I/O / analog input channel 2 |
| Chân 2 | RA3/AN3 — Bidirectional I/O / analog input channel 3 |
| Chân 3 | RA4/T0CKI — Bidirectional I/O / Timer0 clock input |
| Chân 4 | /MCLR — Master clear (reset) input, active low |
| Chân 5 | GND — Ground reference |
| Chân 6 | RB0/INT — Bidirectional I/O / external interrupt input |
| Chân 7 | RB1 — Bidirectional I/O |
| Chân 8 | RB2 — Bidirectional I/O |
| Chân 9 | RB3 — Bidirectional I/O |
| Chân 10 | RB4 — Bidirectional I/O |
| Chân 11 | RB5 — Bidirectional I/O |
| Chân 12 | RB6 — Bidirectional I/O |
| Chân 13 | RB7 — Bidirectional I/O |
| Chân 14 | VDD — Positive supply (5 V) |
| Chân 15 | OSC2/CLKOUT — Oscillator output / clock output |
| Chân 16 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 17 | RA0/AN0 — Bidirectional I/O / analog input channel 0 |
| Chân 18 | RA1/AN1 — Bidirectional I/O / analog input channel 1 |
Ứng dụng tiêu biểu
PIC16C71-04/SO phù hợp cho 6 Áp dụngs: Entry-Level Analog Sensor Reading, Industrial Control Panel MCU, Appliance User Interface Controller, Automotive Aftermarket Sensor Modules, Consumer Electronics Display Controllers, Battery-Powered Measurement Devices.
Entry-Level Analog Sensor Reading
The PIC16C71-04/SO integrates a 4-channel 8-bit ADC on-chip, eliminating an external converter and reducing BOM cost for sensor-reading designs in appliances, climate controls, and battery-powered monitors. Its 200ns instruction execution at 4MHz is adequate for polling sensors at sub-millisecond rates while the 36 bytes of RAM hold recent samples and state. The integrated ADC and Timer0 reduce PCB area and bill-of-materials cost.
Được đề xuất
Industrial Control Panel MCU
At 5V operation with 4 MHz clock, 13 individually direction-controlled I/O, and Brown-out Reset, the PIC16C71-04/SO fits industrial control panels driving relays, keypads, and 7-segment displays. The 1.75 KB OTP program memory stores the main state machine and indicator logic, while the 8-bit Timer0 with 8-bit prescaler handles debouncing and watchdog timing. Housed in 18-SOIC, the chip reflows onto standard industrial PCBs.
Được đề xuất
Appliance User Interface Controller
The PIC16C71-04/SO drives capacitive-touch-free user interfaces on washing machines, microwaves, and dishwashers, using the 4-channel 8-bit ADC to scan resistive touch panels and temperature sensors while the 13 I/O scan LED indicators and 7-segment displays. Its 5V supply and integrated ADC eliminate the need for external level shifters in 5V appliance electronics. Designers value its 35 single-word instructions for fast code development.
Được đề xuất
Automotive Aftermarket Sensor Modules
Automotive aftermarket sensors (temperature, pressure, battery monitors) use the PIC16C71-04/SO's integrated 8-bit ADC to digitize analog sensor signals and its 5V-tolerant I/O to drive LIN/transceiver circuitry. The OTP-EPROM program memory prevents firmware reverse engineering, a security plus for aftermarket products. Borwn-out Reset ensures the MCU recovers cleanly from automotive supply transients.
Được đề xuất
Consumer Electronics Display Controllers
Low-cost consumer electronics — kitchen timers, digital clocks, and simple toys — leverage the PIC16C71-04/SO's 13 I/O pins to drive multiplexed LED displays and read button matrices with minimal external logic. The 4 MHz clock supports 7-segment multiplexing refresh rates above 100 Hz, eliminating visible flicker. The OTP-EPROM and 18-SOIC package keep unit cost low for high-volume consumer SKUs.
Được đề xuất
Battery-Powered Measurement Devices
The PIC16C71-04/SO operates from 5V with under 2 mA typical supply current at 4MHz, making it suitable for portable measurement devices like handheld thermometers and simple multimeter modules. Sleep/idle modes combined with the integrated Brown-out Reset allow long battery life and clean recovery from low-voltage events. The 4-channel ADC scans multiple sensors in handheld instruments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C71-04/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 | PIC16C71T-04/SO | PIC16C71-04S/SO | PIC16F71-04/SO | PIC16F818-04/SO | PIC16C710-04/SO | PIC16C711-04/SO |
|---|---|---|---|---|---|---|---|
| Package | 18-SOIC | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP EPROM (1.75 KB) | OTP EPROM (1.75 KB) | OTP EPROM (1.75 KB) | Flash (1.75 KB) | Flash (1.75 KB) | OTP EPROM (0.5 KB) | OTP EPROM (1.75 KB) |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz (20 MHz grade available) | 4 MHz grade (20 MHz grade available) | 4 MHz | 4 MHz |
| Instruction Execution Time | 200 ns | 200 ns | 200 ns | 200 ns | 200 ns | 200 ns | 200 ns |
| Data RAM | 36 bytes | 36 bytes | 36 bytes | 36 bytes | 128 bytes | 24 bytes (-33%) | 36 bytes |
| ADC Channels / Resolution | 4 x 8-bit | 4 x 8-bit | 4 x 8-bit | 4 x 8-bit | 5 x 10-bit (extra channel, higher resolution) | 4 x 8-bit | 4 x 8-bit |
| I/O Pins | 13 | 13 | 13 | 13 | 16 | 13 | 13 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Active (recommended for new designs) | Active | Obsolete | Obsolete |
Bảo phân biệt quan trọng
- Integrated 4-channel 8-bit ADC eliminated external converter (vsPIC16C710-04/SO)
- OTP security against firmware readback (vsPIC16F71-04/SO)
- Brown-out Reset included on-chip (vsExternal supervisory reset circuits on discrete-MCU designs)
Ghi chú thiết kế
Estimated: PIC16C71-04/SO is OTP-EPROM and cannot be reprogrammed. Do not use for development boards or any design where firmware revisions are expected — instead, prototype on a PIC16F71-04/SO (flash) and only commit to PIC16C71-04/SO for production runs where the firmware is final. OTP blank-windowed parts (PIC16C71-04/JW ceramic windowed package) are needed for PIC16C71 code iteration; the /SO is one-time only.
Estimated: At 5V and 4 MHz, the PIC16C71-04/SO draws under 2 mA typical active current. For battery-powered designs, exploit the SLEEP instruction (current drops to a few microamps) and use the Brown-out Reset to recover cleanly from low-voltage events. Add a 100 nF decoupling capacitor directly at VDD (pin 14) and a bulk capacitor at the board power entry for noise immunity.
Estimated: Place the 4 MHz crystal or resonator close to pins 15 (OSC2) and 16 (OSC1) with short symmetrical traces, and keep digital switching lines away from the RA0–RA3 analog inputs. The on-chip ADC performance degrades if analog traces run parallel to high-frequency digital traces; keep analog traces short and add a ground pour under the analog pins for ADC accuracy. /MCLR (pin 4) should be pulled up to VDD via 10 kΩ and decoupled with a 100 nF capacitor for stable reset behavior.
Thông tin tuân thủ
PIC16C71-04/SO is a legacy OTP-EPROM MCU from the mid-1990s that predates comprehensive RoHS/REACH declarations. RoHS and lead-free status not explicitly stated in the verified distributor listings — contact Microchip for the specific ordering code’s lead-finish declaration. AEC-Q100 is not applicable for this commercial-temperature 8-bit MCU; an industrial-temperature variant exists separately.
