PIC16LC771T-I/SS - 8-Bit MCU, 7KB OTP, 20MHz, 12-Bit ADC | Microchip
部品番号: PIC16LC771T-I/SS ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.78 | $4.78 |
| 10 | $4.31 | $43.10 |
| 100 | $3.83 | $383.00 |
| 500 | $3.45 | $1,725.00 |
| 1,000 | $3.07 | $3,070.00 |
PIC16LC771T-I/SS 概要
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.
ドロップイン代替品: PIC16LC771T-I/SS — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PIC16LC771T-I/SS （同一形状・フットプリント） — 相違点: ADC, Communication, Package, Timers, Core.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16LC770T-I/SS
✅ ドロップイン✓ 在庫あり
$2.58 / 個
データシートを見る →PIC16LC771T-E/SS
✅ ドロップイン✓ 在庫あり
$2.62 / 個
データシートを見る →PIC16F887T-I/SS
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC16LC771T-I/SS 最大定格＆電気的特性
| Core | PIC16 (8-bit RISC, Harvard) |
| Program Memory | 7 KB (4K x 14) OTP |
| Data Memory (RAM) | 256 bytes |
| 最大クロック周波数 | 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) |
| パッケージ | 20-pin SSOP |
| 実装タイプ | Surface Mount |
| 動作温度 | -40C to +85C (Industrial) |
PIC16LC771T-I/SS ピン構成
| ピン 1 | RA0/AN0 — Digital I/O / Analog channel 0 |
| ピン 2 | RA1/AN1 — Digital I/O / Analog channel 1 |
| ピン 3 | RA2/AN2/Vref- — Digital I/O / Analog channel 2 / ADC negative reference |
| ピン 4 | RA3/AN3/Vref+ — Digital I/O / Analog channel 3 / ADC positive reference |
| ピン 5 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| ピン 6 | RA5/AN4/SS — Digital I/O / Analog channel 4 / SPI slave select |
| ピン 7 | Vss — Ground |
| ピン 8 | OSC1/CLKI — Crystal oscillator input / external clock |
| ピン 9 | OSC2/CLKO — Crystal oscillator output / clock out |
| ピン 10 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / Timer1 clock |
| ピン 11 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 |
| ピン 12 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| ピン 13 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| ピン 14 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| ピン 15 | RC5/SDO — Digital I/O / SPI data out |
| ピン 16 | RC6/TX/CK — Digital I/O / USART TX / USART clock |
| ピン 17 | RC7/RX/DT — Digital I/O / USART RX / USART data |
| ピン 18 | Vdd — Positive supply (3.0-5.5V) |
| ピン 19 | Vss — Ground |
| ピン 20 | MCLR/Vpp — Reset (active low) / Programming voltage |
主な用途
PIC16LC771T-I/SS の用途: 6 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PIC16LC771T-I/SS — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- 12-bit ADC resolution vs same-family 10-bit alternatives （vs PIC16LC770T-I/SS)
- Wide operating voltage for 3.3V and 5V designs （vs PIC16F877A-I/SS)
- OTP memory locks production firmware （vs PIC16F887T-I/SS)
設計ノート
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.
コンプライアンス情報
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.
