PIC16LC774T-I/PT - 8-Bit MCU, 7KB OTP, 12-bit ADC | Microchip
料号： PIC16LC774T-I/PT ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.45 | $12.45 |
| 10 | $11.18 | $111.80 |
| 100 | $9.75 | $975.00 |
| 500 | $8.65 | $4,325.00 |
| 1,000 | $7.85 | $7,850.00 |
PIC16LC774T-I/PT 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory and peripheral interfaces on one die. The PIC16LC774 belongs to the 8-bit PIC16 family, which sits within the broader 8-bit microcontroller hierarchy (8-bit MCU -> microcontroller -> embedded processor -> semiconductor). It uses a RISC-style Harvard architecture with separate program and data buses, and OTP program memory is programmed once at production time, making the LC variants well suited to high-volume cost-sensitive applications where firmware is final.
Key features of the PIC16LC774T-I/PT include: 33 digital I/O pins, three counter/timer modules, a Watchdog Timer (WDT), I2C/SPI/UART-USART serial interfaces, dual analog comparators, and 10 channels of 12-bit ADC. According to the manufacturer datasheet, all instructions execute in a single cycle except program branches which take two cycles, and the device operates across the industrial -40C to +85C temperature range.
Typical applications include industrial process control with analog front ends, instrumentation requiring precision ADC inputs, motor control with feedback sensing, sensor conditioning, and mixed-signal embedded systems. The 12-bit ADC resolution (vs 10-bit on smaller PIC16 parts) makes the LC774 particularly suited for precision measurement applications that would otherwise require an external ADC.
When designing with this device, ensure external oscillator components are chosen to meet the 20 MHz specification, and consider migrating to the PIC16F877 (Flash-based equivalent in the same 44-TQFP footprint) for prototypes or low-volume production where in-system reprogrammability is required. The 'LC' family is the lowest-power 16C line; the 'F' family offers Flash memory for development.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone - including same-package same-family PIC16 variants and pin-compatible cross-brand considerations that engineers actually evaluate during component selection.
直接替换替代料： PIC16LC774T-I/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16LC774T-I/PT （相同外形与封装尺寸） ——差异在于 Program Memory Size, Package, ADC, Core Architecture, Instruction Cycle Time.
快速对比工具——选择替代料号进行并排对比：
PIC16LC774-I/PT
✅ 直接替换✓ 有现货
$2.95 / 个
查看数据手册 →PIC16LC774T-20I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC16C765-I/PT
✅ 直接替换✓ 有现货
$4.7 / 个
查看数据手册 →PIC16F877-04/PT
✅ 直接替换✓ 有现货
$5.2 / 个
查看数据手册 →PIC16F877A-I/PT
✅ 直接替换✓ 有现货
$4.95 / 个
查看数据手册 →PIC16LC67-04/PT
✅ 直接替换✓ 有现货
$6.98 / 个
查看数据手册 →PIC16LC774T-I/PT 最大额定值与电气特性
| Core | PIC 8-bit RISC |
| Series | PIC® 16C |
| Program Memory Size | 7 KB (4K x 14) OTP |
| RAM Size | 256 x 8 bytes |
| Maximum CPU Frequency | 20 MHz |
| Number of I/O Pins | 33 |
| ADC | 10 channels, 12-bit |
| Serial Interfaces | I2C, SPI, UART/USART |
| Timers | 3 x Counter/Timer + WDT |
| Instruction Set | 35 single-word instructions |
| Instruction Cycle | Single cycle (branches 2-cycle) |
| 工作温度 | -40C to +85C (industrial, I-grade) |
| Oscillator Type | External |
| 封装 | 44-TQFP (PT), 10x10 mm |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (TR) |
PIC16LC774T-I/PT 引脚配置
| 引脚 1 | RA0/AN0 — Port A bit 0 / ADC analog input 0 |
| 引脚 2 | RA1/AN1 — Port A bit 1 / ADC analog input 1 |
| 引脚 3 | RA2/AN2 — Port A bit 2 / ADC analog input 2 |
| 引脚 4 | RA3/AN3/VREF+ — Port A bit 3 / ADC analog input 3 / ADC positive reference |
| 引脚 5 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| 引脚 6 | RA5/AN4/SS — Port A bit 5 / ADC analog input 4 / SPI slave select |
| 引脚 7 | OSC1/CLKIN — External oscillator input / external clock input |
| 引脚 8 | OSC2/CLKOUT — External oscillator output / clock output |
| 引脚 9 | MCLR/VPP — Master clear reset / programming voltage input |
| 引脚 10 | VSS — Ground reference |
| 引脚 11 | VDD — Positive supply voltage |
| 引脚 12 | RB0/INT — Port B bit 0 / external interrupt input |
| 引脚 13 | RB1 — Port B bit 1 |
| 引脚 14 | RB2 — Port B bit 2 |
| 引脚 15 | RB3/PGM — Port B bit 3 / low-voltage programming input |
| 引脚 16 | RB4 — Port B bit 4 |
| 引脚 17 | RB5 — Port B bit 5 |
| 引脚 18 | RB6/PGC — Port B bit 6 / ICSP clock input |
| 引脚 19 | RB7/PGD — Port B bit 7 / ICSP data I/O |
| 引脚 20 | VSS — Ground reference |
| 引脚 21 | VDD — Positive supply voltage |
| 引脚 22 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer 1 oscillator output / Timer 1 clock input |
| 引脚 23 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer 1 oscillator input / CCP2 I/O |
| 引脚 24 | RC2/CCP1 — Port C bit 2 / CCP1 I/O |
| 引脚 25 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| 引脚 26 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| 引脚 27 | RC5/SDO — Port C bit 5 / SPI data out |
| 引脚 28 | RC6/TX/CK — Port C bit 6 / UART transmit / USART clock |
| 引脚 29 | RC7/RX/DT — Port C bit 7 / UART receive / USART data |
| 引脚 30 | RD0 — Port D bit 0 |
| 引脚 31 | RD1 — Port D bit 1 |
| 引脚 32 | RD2 — Port D bit 2 |
| 引脚 33 | RD3 — Port D bit 3 |
| 引脚 34 | RD4 — Port D bit 4 |
| 引脚 35 | RD5 — Port D bit 5 |
| 引脚 36 | RD6 — Port D bit 6 |
| 引脚 37 | RD7 — Port D bit 7 |
| 引脚 38 | VSS — Ground reference |
| 引脚 39 | VDD — Positive supply voltage |
| 引脚 40 | RE0/RD/AN5 — Port E bit 0 / read control / ADC analog input 5 |
| 引脚 41 | RE1/WR/AN6 — Port E bit 1 / write control / ADC analog input 6 |
| 引脚 42 | RE2/CS/AN7 — Port E bit 2 / chip select / ADC analog input 7 |
| 引脚 43 | AN8 — ADC analog input 8 |
| 引脚 44 | AN9 — ADC analog input 9 |
典型应用
PIC16LC774T-I/PT 适用于 6 应用s: Industrial Process Control, Precision Instrumentation & Data Acquisition, Motor Control & Drive Feedback, Mixed-Signal Embedded Systems, Sensor Conditioning & Signal Processing, Building Automation & HVAC Control.
Industrial Process Control
The PIC16LC774T-I/PT is well suited for industrial process control applications requiring precision analog measurement in noisy factory environments. Its 10-channel 12-bit ADC provides 4096 discrete steps per channel - doubling the resolution of 10-bit ADC parts - enabling accurate reading of thermocouples, RTDs, 4-20 mA loops, and strain-gauge bridges when paired with external signal conditioning. The 20 MHz RISC core executes the PID control loop and supervisory logic in real time, while the 33 I/O pins handle digital sensors, relay drivers, and HMI interfaces.
推荐
Precision Instrumentation & Data Acquisition
The 12-bit ADC and 20 MHz processing throughput make the PIC16LC774T-I/PT suitable for portable and benchtop instrumentation. Sampling at the ADC's maximum rate, the MCU can digitize multi-channel sensor arrays and stream results via UART or SPI to a host PC or display. The PIC16 RISC architecture executes 35 instructions in a single cycle, leaving ample CPU headroom for digital filtering, calibration, and unit conversion. The 44-TQFP package provides a compact 10x10 mm footprint suitable for handheld instrument designs.
推荐
Motor Control & Drive Feedback
Brushless DC and stepper motor controllers benefit from the PIC16LC774T-I/PT's combination of 12-bit ADC for current/voltage sensing, three timer modules for PWM generation and quadrature decoding, and 20 MHz throughput for commutation loops. The MCU can sample phase currents via shunt resistors, compute torque-control algorithms, and drive the gate-driver stage via PWM outputs. Compared to smaller PIC16 parts with 8-bit ADCs, the LC774's 12-bit converter improves torque-loop accuracy and reduces ripple in precision motion control.
推荐
Mixed-Signal Embedded Systems
Designers building mixed-signal products - combining analog sensing, digital control, and serial communication - can leverage the PIC16LC774T-I/PT's integrated peripherals. The 12-bit ADC handles analog inputs, the I2C/SPI interfaces connect to sensors and external memory, and the UART provides wired connectivity. With 33 I/O pins and 256 bytes RAM, the MCU fits applications such as HVAC controllers, smart sensor nodes, and appliance control boards. OTP memory reduces per-unit cost in high-volume consumer products where firmware is fixed.
推荐
Sensor Conditioning & Signal Processing
The PIC16LC774T-I/PT's 12-bit ADC (10 channels) and 20 MHz processing support multi-sensor signal conditioning designs. Each ADC channel can be configured for independent sampling rates and trigger sources, allowing simultaneous monitoring of pressure, temperature, and flow signals in process instrumentation. The CPU executes digital filtering algorithms to smooth noisy sensor outputs before transmitting calibrated values via UART. The 256-byte RAM supports small lookup tables and FIR filter coefficients for real-time signal conditioning.
推荐
Building Automation & HVAC Control
Building automation controllers benefit from the PIC16LC774T-I/PT's blend of analog and digital peripherals. The 12-bit ADC reads multiple temperature zones and humidity sensors, while I2C connects to external RTC and EEPROM for scheduling. UART enables communication with HVAC peripheral boards. The 33 I/O pins drive relays, triacs, and indicator LEDs directly. The OTP program memory locks in validated HVAC control firmware, ensuring field-deployed units cannot be inadvertently reprogrammed by end users.
推荐
推荐产品汇总
工程参考数据： PIC16LC774T-I/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16LC774-I/PT | PIC16LC774T-20I/PT | PIC16C765-I/PT | PIC16F877-04/PT | PIC16F877A-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (PT) | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same |
| Core / Architecture | PIC16 8-bit RISC | PIC16 8-bit RISC - same | PIC16 8-bit RISC - same | PIC16 8-bit RISC - same | PIC16 8-bit RISC - same | PIC16 8-bit RISC - same |
| Program Memory Type | OTP (7 KB) | OTP (7 KB) | OTP (7 KB) | EPROM (14 KB) | Flash (14 KB) | Flash (14 KB) |
| Program Memory Size | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 14 KB (+100%) | 14 KB (+100%) | 14 KB (+100%) |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz (-80%) | 20 MHz |
| Lifecycle Status | NRND | NRND | NRND | Obsolete | Obsolete | Active |
关键差异点
- 12-bit ADC vs 10-bit on Flash equivalent （对比 PIC16F877A-I/PT)
- Same 44-TQFP footprint as F877A migration path （对比 PIC16F877A-I/PT)
- Larger 14 KB program memory in PIC16C765 （对比 PIC16C765-I/PT)
设计说明
Estimated: The PIC16LC774T-I/PT belongs to the PIC16LC family ('LC' = Low-Voltage CMOS, typically 2.5V-5.5V VDD). When designing the supply rail, place a 100 nF decoupling capacitor close to each VDD pin and a bulk 10 µF tantalum or ceramic capacitor at the board's power entry. Multiple VSS/VDD pairs on the 44-TQFP package reduce ground bounce - connect each VSS pin individually to the ground plane rather than daisy-chaining.
The PIC16LC774 uses an external oscillator; connect a 20 MHz crystal with appropriate load capacitors (typically 15-33 pF) between OSC1 (pin 7) and OSC2 (pin 8). For high-noise industrial environments, consider a four-pin crystal module rather than a two-pin discrete crystal to reduce EMI susceptibility. Keep the oscillator traces short and surrounded by a ground guard ring.
The 'T' suffix in PIC16LC774T-I/PT denotes Tape & Reel packaging - functionally identical to PIC16LC774-I/PT in Tray. Do not confuse the lifecycle status: NRND applies to the entire PIC16LC774 family, so even freshly manufactured parts should not be specified for new designs without migration planning. The 'I' suffix indicates the industrial -40C to +85C temperature grade; for extended temperature, check Microchip documentation.
The 44-TQFP package has 0.8 mm pitch leads; ensure PCB land patterns follow IPC-7351 nominal-density guidelines. Place the ICSP test points (PGC pin 18, PGD pin 19, MCLR pin 9) at the board edge for in-circuit programming access. Route the analog ADC inputs (AN0-AN9) away from digital switching signals and keep VREF traces short to minimize ADC noise.
合规信息
RoHS and REACH compliance status for PIC16LC774T-I/PT not explicitly confirmed in the verified web data; lead-free per Microchip surface-mount packaging convention. AEC-Q100 not applicable - this is a general-purpose industrial MCU, not automotive-qualified. Conflict-mineral statement per Microchip corporate compliance policy.