PIC16LC771T-I/SS - 8-Bit MCU, 7KB OTP, 20MHz, 12-Bit ADC | Microchip
MPN: PIC16LC771T-I/SS ✗ Cuối đờiPIC16LC771T-I/SS Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals on one IC. The PIC16LC77x family belongs to the broader PIC16 8-bit mid-range family, which sits inside the 8-bit MCU segment of the embedded hierarchy (8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC). The PIC16LC771 specifically targets low-voltage operation (the "LC" prefix denotes a 3.3V nominal part).
Key features include a 12-bit A/D converter (up to 16 channels depending on package), 16 I/O pins with individual direction control, USART, MSSP (SPI/I2C), two 8-bit timers plus one 16-bit timer, and an enhanced capture/compare/PWM module. The "L" designation indicates operation from 3.0V to 5.5V, suiting battery-powered or 3.3V regulated rails. The 20 MHz oscillator enables 200 ns instruction cycle throughput.
The PIC16LC771 uses a Harvard-architecture RISC core with 35 single-word instructions. Its 12-bit ADC (successive approximation) provides up to 12 channels on the 20-pin package, with an internal sample-and-hold. The OTP memory allows one-time field programming - suitable for production runs but not for firmware updates.
Typical applications include industrial control front-ends, instrumentation data acquisition, sensor signal processing, and HVAC system management. The 12-bit ADC and ample digital I/O make it well-suited for mixed-signal embedded products.
When designing with this part, ensure the Vdd rail is decoupled with 100 nF ceramic at each supply pin and a bulk 10 uF tantalum. The MCLR pin must be pulled high through a 10 k resistor; do not leave it floating.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC771T-I/SS — 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 PIC16LC771T-I/SS (cùng hình factor và footprint) — khác nhau ở ADC, Communication, Package, Timers, Core.
PIC16LC770T-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC771T-E/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F887T-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC771T-I/SS Tỷ lệ tối đa & tính chất điện
| Core | PIC16 (8-bit RISC, Harvard) |
| Program Memory | 7 KB (4K x 14) OTP |
| Data Memory (RAM) | 256 bytes |
| Tần số xung maksimum | 20 MHz |
| Instruction Cycle | 200 ns (at 20 MHz) |
| ADC | 12-bit, up to 16 channels |
| Operating Voltage (Vdd) | 3.0 V to 5.5 V |
| I/O Pins | 16 |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Communication | USART + SPI + I2C (MSSP) |
| Hộp | 20-pin SSOP |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
Cấu hình chân PIC16LC771T-I/SS
| Chân 1 | RA0/AN0 — Digital I/O / Analog channel 0 |
| Chân 2 | RA1/AN1 — Digital I/O / Analog channel 1 |
| Chân 3 | RA2/AN2/Vref- — Digital I/O / Analog channel 2 / ADC negative reference |
| Chân 4 | RA3/AN3/Vref+ — Digital I/O / Analog channel 3 / ADC positive reference |
| Chân 5 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Chân 6 | RA5/AN4/SS — Digital I/O / Analog channel 4 / SPI slave select |
| Chân 7 | Vss — Ground |
| Chân 8 | OSC1/CLKI — Crystal oscillator input / external clock |
| Chân 9 | OSC2/CLKO — Crystal oscillator output / clock out |
| Chân 10 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / Timer1 clock |
| Chân 11 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 |
| Chân 12 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| Chân 13 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Chân 14 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Chân 15 | RC5/SDO — Digital I/O / SPI data out |
| Chân 16 | RC6/TX/CK — Digital I/O / USART TX / USART clock |
| Chân 17 | RC7/RX/DT — Digital I/O / USART RX / USART data |
| Chân 18 | Vdd — Positive supply (3.0-5.5V) |
| Chân 19 | Vss — Ground |
| Chân 20 | MCLR/Vpp — Reset (active low) / Programming voltage |
Ứng dụng tiêu biểu
PIC16LC771T-I/SS phù hợp cho 6 Áp dụngs: Industrial Sensor Signal Conditioning, Battery-Powered Data Loggers, HVAC Control Systems, Instrumentation Front-End, Automotive Body Electronics (Non-Safety), Embedded Control with Mixed-Signal I/O.
Industrial Sensor Signal Conditioning
The PIC16LC771T-I/SS fits industrial 4-20 mA loop-powered sensor front-ends because its 12-bit ADC delivers 4096-step resolution across the 0-5V industrial signal range, and its 16 digital I/O pins can drive H-bridges, opto-isolators, and status LEDs. The 3.0-5.5V supply matches 24V loop-powered regulators down-converted to 5V. The 20 MHz core handles linearization math and HART-style modulation in software. Compared to a discrete op-amp + ADC solution, the integrated MCU reduces BOM count and PCB complexity.
Được đề xuất
Battery-Powered Data Loggers
The "LC" low-voltage variant of the PIC16LC771T-I/SS operates from 3.0V making it suitable for battery-powered data loggers running from two AA cells or a single Li-ion cell. The 256-byte RAM and 7 KB OTP handle circular buffer management and sample scheduling. The 12-bit ADC supports direct connection to temperature, voltage, and current sensors without external signal conditioning. Sleep current down to microamp range extends battery life. The SSOP-20 package keeps the design footprint compact for handheld instruments.
Được đề xuất
HVAC Control Systems
The PIC16LC771T-I/SS is well-suited to HVAC damper and valve control where multiple analog inputs (temperature, humidity, pressure) and digital outputs (relay drivers, triac gates) are required. The 12-bit ADC reads thermistor bridges with sufficient resolution for 0.1 C setpoint control. USART enables communication with a master Building Management System (BMS) over RS-485 transceivers. The -40 C to +85 C industrial temperature range covers unconditioned equipment-room environments. OTP memory suits the locked firmware profile of production HVAC controllers.
Được đề xuất
Instrumentation Front-End
Precision instrumentation front-ends benefit from the PIC16LC771T-I/SS 12-bit ADC and 20 MHz processing throughput. Multiplexing multiple sensor channels through the 12-bit ADC reduces analog switching complexity; the USART streams digitized data to a host PC or display controller. The 3.0-5.5V supply tolerates regulated USB power or laboratory bench supplies. Combined with the SSOP-20 small outline, it fits compact bench-top instruments and panel meters where board space is at a premium.
Được đề xuất
Automotive Body Electronics (Non-Safety)
Body-control modules (mirror adjusters, seat controllers, interior accessory timers) can leverage the PIC16LC771T-I/SS 16 I/O pins and 12-bit ADC for reading potentiometer positions and driving relays. The "I" industrial temperature grade covers cabin environments (-40 C to +85 C); for under-hood applications, the "E" extended grade PIC16LC771T-E/SS is preferred. OTP memory locks the firmware at production. Note that AEC-Q100 automotive qualification is NOT claimed for this part; for safety-critical body ECUs use PIC16F887 automotive grades.
Được đề xuất
Embedded Control with Mixed-Signal I/O
Mixed-signal embedded products (smart thermostats, programmable logic controllers, motor-control boards) benefit from the PIC16LC771T-I/SS combination of 12-bit ADC, PWM module, USART, and 16 GPIO. The PWM channel generates timing signals for triac-fired heater elements or DC motor speed control; the ADC monitors process feedback. The 20 MHz instruction rate handles PID control loops at 1 kHz update rates. SSOP-20 surface-mount package suits modern SMT assembly lines for cost-effective volume production.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC771T-I/SS — 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 | PIC16LC770T-I/SS | PIC16LC771T-E/SS | PIC16F887T-I/SS | PIC16LC771T-I/SO |
|---|---|---|---|---|---|
| Package | 20-pin SSOP | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SOIC - different |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory | 7 KB OTP | 7 KB OTP - same | 7 KB OTP - same | 14 KB Flash - different | 7 KB OTP - same |
| ADC Resolution | 12-bit | 10-bit - different | 12-bit - same | 14-bit - different | 12-bit - same |
| Maximum Clock | 20 MHz | 20 MHz - same | 20 MHz - same | 20 MHz - same | 20 MHz - same |
| Operating Voltage | 3.0-5.5 V | 3.0-5.5 V - same | 3.0-5.5 V - same | 2.0-5.5 V - wider | 3.0-5.5 V - same |
| RAM | 256 bytes | 256 bytes - same | 256 bytes - same | 368 bytes - different | 256 bytes - same |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) - same | Extended (-40C to +125C) - wider | Industrial (-40C to +85C) - same | Industrial (-40C to +85C) - same |
| I/O Pins | 16 | 16 - same | 16 - same | 36 - different (28/40-pin variants) | 16 - same |
Bảo phân biệt quan trọng
- 12-bit ADC resolution vs same-family 10-bit alternatives (vsPIC16LC770T-I/SS)
- Wide operating voltage for 3.3V and 5V designs (vsPIC16F877A-I/SS)
- OTP memory locks production firmware (vsPIC16F887T-I/SS)
Ghi chú thiết kế
Decouple Vdd with a 100 nF ceramic capacitor placed within 5 mm of the Vdd pin (pin 18) and a bulk 10 uF tantalum or aluminum electrolytic capacitor on the same supply rail. The Vss pin (pin 19) must connect to a low-impedance ground plane; a single-point ground topology is acceptable for low-frequency analog designs. Estimated: a single 100 nF X7R ceramic at 5 mm loop inductance is sufficient to suppress switching transients up to 200 MHz.
The MCLR pin (pin 20) must be pulled high through a 10 kohm resistor to Vdd; do not leave it floating, or the MCU will randomly reset during operation. For ICSP (In-Circuit Serial Programming), MCLR must reach 13V Vpp; place a diode or resistor divider to isolate the programming voltage from the rest of the circuit. The OSC1/OSC2 pins should not be used as digital I/O when the internal oscillator is selected, or the oscillator will malfunction.
Route the analog ADC inputs (RA0-RA5) away from high-frequency digital signals (USART, SPI clock lines) and from switching power converters. Place a ground plane under the MCU and dedicate an analog ground island for the ADC reference and analog inputs. Estimated: 5 mm trace separation reduces digital-to-analogic coupling by approximately 20 dB at 100 MHz; a continuous ground plane under the analog traces further reduces pickup.
Thông tin tuân thủ
Specific RoHS and REACH status not listed in Verified Web Data; marked unknown per Data Authenticity Rules. AEC-Q100 not claimed - this part is not qualified for automotive safety applications. For automotive ECUs, use AEC-Q100-qualified variants such as PIC16F887-E/SS or PIC18F equivalents.
