PIC16LC774T/PT - 8-Bit 20MHz OTP MCU 7KB Flash | Microchip
Артикул: PIC16LC774T/PT ✗ Снят с производства| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $12.5 | $12,50 |
| 10 | $11.25 | $112,50 |
| 100 | $9.8 | $980,00 |
| 500 | $8.65 | $4.325,00 |
| 1.000 | $7.4 | $7.400,00 |
PIC16LC774T/PT Обзор
What is an 8-bit microcontroller? An 8-bit MCU is a small computer-on-a-chip with an 8-bit data path; the PIC16 family from Microchip uses a Harvard-architecture RISC core with a single accumulator (W register) and a small, fixed instruction set optimized for deterministic single-cycle execution. OTP microcontrollers are programmed once at production and cannot be erased, which lowers unit cost versus flash-based parts in high-volume applications.
The PIC16LC774T/PT features 33 general-purpose digital I/O pins and integrates a 12-bit Analog-to-Digital Converter (ADC) with up to 10 input channels, providing precision mixed-signal capability for sensor-interface designs. Connectivity peripherals include I2C, SPI, and UART/USART interfaces, enabling the part to act as a communication hub or peripheral controller. The 'LC' suffix denotes a low-voltage CMOS variant that operates across 2.5V to 5.5V, ideal for battery-powered and portable systems.
The PIC16LC774 is built on Microchip's enhanced mid-range core, supporting 35 single-word instructions with all instructions executing in a single instruction cycle except program branches (two cycles). The architecture provides 8-level deep hardware stack and interrupt handling with context saving, allowing responsive real-time control loops. An external oscillator interface supports crystals, resonators, or external clock sources up to 20MHz.
Typical applications include industrial sensor conditioning with 12-bit ADC conversion, consumer appliance control panels, automotive body electronics subsystems, HVAC control modules, and embedded data-acquisition front-ends. The 33 I/O pins easily drive keypads, LED indicators, LCDs, and small relay or MOSFET driver stages.
When designing with this device, note the OTP memory cannot be re-programmed in-circuit - firmware must be fully validated before production programming. The 44-pin TQFP package provides compact PCB mounting and adequate thermal performance for industrial temperature grade.
This page consolidates distributor pricing, pin-compatible TQFP-44 alternatives, and practical design notes not found in the manufacturer datasheet.
Аналоги без доработки для PIC16LC774T/PT — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с PIC16LC774T/PT (тот же форм-фактор и посадочное место) — отличается по ADC, Program Memory Size, Core Architecture, Instruction Cycle Time, Maximum Clock Frequency.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC16LC774-I/PT
✅ Прямая замена✓ В наличии
$2.95 / шт.
Открыть даташит →PIC16F877A-I/PT
✅ Прямая замена✓ В наличии
$4.95 / шт.
Открыть даташит →PIC16C774T-I/PT
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC16F877-04/PT
✅ Прямая замена✓ В наличии
$5.2 / шт.
Открыть даташит →PIC16C765-I/PT
✅ Прямая замена✓ В наличии
$4.7 / шт.
Открыть даташит →PIC16LC774T/PT Максимальные параметры и электрические характеристики
| Product Family | PIC16 8-bit Microcontroller |
| Core | PIC 8-bit RISC |
| CPU Architecture | Harvard, 8-bit data path |
| Максимальная тактовая частота | 20 MHz |
| Program Memory Size | 7 KB (4K x 14) OTP |
| RAM Size | 256 x 8 bytes |
| Number of I/O Pins | 33 |
| ADC | 12-bit, 10 channels |
| Communication Interfaces | I2C, SPI, UART/USART |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Рабочая температура | 0C to +70C (commercial) |
| Корпус | 44-pin TQFP (10x10 mm) |
| Тип монтажа | Surface Mount |
| Instruction Set | 35 single-word instructions |
| Instruction Cycle | Single cycle (branches: 2 cycles) |
| Oscillator Type | External |
Руководство по цоколевке PIC16LC774T/PT в корпусе 44-pin tqfp (10x10 mm)
Цоколевка для PIC16LC774T/PT (корпус 44-pin tqfp (10x10 mm)). Эта цифровая ИС включает выводы GPIO, интерфейсы связи (UART, SPI, I2C) и выводы питания. Обратитесь к техническому описанию производителя для альтернативных функций выводов и вариантов конфигурации. Необходимо для проектирования встраиваемых систем и трассировки печатных плат.
Нет подробных данных о распиновке для PIC16LC774T/PT.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
PIC16LC774T/PT подходит для 6 применениеs: Industrial Sensor Data Acquisition, Consumer Appliance Control Boards, Automotive Body Electronics, HVAC Climate Control Modules, Embedded Data Acquisition Front-Ends, Educational and Development Boards.
Industrial Sensor Data Acquisition
The PIC16LC774T/PT's 12-bit ADC with 10 input channels and 33 GPIO pins makes it well-suited for multi-sensor industrial monitoring panels reading 4-20 mA, 0-10V, and thermistor/resistive sensors simultaneously. At 20MHz it executes ADC conversion and linearization math in a single instruction cycle, suiting real-time process loops. Its 2.5V-5.5V supply accepts battery stacks or regulated 24V industrial rails after buck conversion, and the TQFP-44 footprint fits compact DIN-rail enclosure PCBs. Compared to 10-bit ADC parts, the 12-bit converter quadruples measurement resolution, critical for precision temperature and strain-gauge instrumentation.
Рекомендуется
Consumer Appliance Control Boards
The PIC16LC774T/PT's OTP memory and 33 I/O pins are ideal for cost-sensitive appliance controllers in washing machines, dishwashers, and microwave ovens, where the firmware is finalized at production and never updated. Its 12-bit ADC reads keypad analog inputs and motor current sensing, while I2C/SPI connect to LED display drivers and EEPROM. The 256-byte RAM handles small state machines for control loops, and the 20MHz core provides responsive timing for safety-critical interlocks. OTP memory prevents unauthorized firmware modification, useful for regulatory compliance in appliance safety design.
Рекомендуется
Automotive Body Electronics
In automotive body control modules - window lifters, mirror adjusters, seat controllers - the PIC16LC774T/PT's 33 I/O pins drive multiple motor H-bridges and switch inputs without external multiplexers. The 12-bit ADC provides precise battery voltage monitoring for low-voltage cutoff protection, while the UART peripheral interfaces with the vehicle CAN-bus gateway. Its commercial 0-70C temperature range suits cabin-mounted modules; for under-hood applications the industrial-grade PIC16LC774-I/PT variant is required. The TQFP-44 package withstands automotive vibration profiles when properly PCB-mounted with underfill or staking.
Рекомендуется
HVAC Climate Control Modules
HVAC control panels benefit from the PIC16LC774T/PT's combination of 12-bit ADC for thermistor temperature sensing and 33 I/O for triac-driven fan/valve control. The 20MHz core executes PID control loops in real time, while the I2C peripheral reads indoor air quality sensors and writes to LCD character displays. Operating from 2.5V-5.5V allows direct connection to 5V regulated supplies common in HVAC line-voltage-derived power rails. The OTP memory secures proprietary calibration data and prevents field firmware tampering, important for energy-efficiency certified products requiring locked control algorithms.
Рекомендуется
Embedded Data Acquisition Front-Ends
The PIC16LC774T/PT's 10-channel 12-bit ADC and serial communication peripherals position it as a cost-effective front-end for multi-channel data loggers measuring pressure, flow, level, and environmental variables. At approximately 100 ksps aggregate throughput, it handles slow-industrial signal acquisition well. The 256-byte RAM buffers incoming samples for batch transfer over UART or SPI to a host processor. Its 5V-tolerant I/Os interface directly with 4-20 mA current loop receivers and 0-10V transducers without level shifters, simplifying analog front-end design. Compared to external ADC chips, the integrated converter reduces BOM cost and PCB area.
Рекомендуется
Educational and Development Boards
The PIC16LC774T/PT remains popular in university embedded systems courses and hobbyist development kits due to its accessible instruction set, comprehensive peripheral set, and extensive documentation from Microchip's academic program. The 33 I/Os connect to breadboard-friendly prototyping boards, while I2C/SPI/UART peripherals demonstrate real-world communication protocols. The 12-bit ADC teaches mixed-signal design concepts. Although the part is NRND, educational labs continue using it because PIC16 development tools (MPLAB X IDE, XC8 compiler, PICkit programmers) remain free and well-supported. Students learn the same PIC16 core that underpins the active PIC16F877A.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC16LC774T/PT — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | PIC16LC774-I/PT | PIC16F877A-I/PT | PIC16C774T-I/PT | PIC16F877-04/PT | PIC16C765-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (10x10 mm) | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same | 44-pin TQFP (10x10 mm) - same |
| Program Memory | 7 KB OTP | 7 KB OTP | 14 KB Flash | 7 KB OTP | 14 KB Flash | 14 KB OTP |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 20 MHz |
| RAM Size | 256 B | 256 B | 368 B | 256 B | 368 B | 256 B |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| ADC | 12-bit, 10 channels | 12-bit, 10 channels | 10-bit, 8 channels | 12-bit, 10 channels | 10-bit, 8 channels | 12-bit, 10 channels |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.0 V to 5.5 V | 4.5 V to 5.5 V | 2.0 V to 5.5 V | 4.5 V to 5.5 V |
| Lifecycle Status | NRND | NRND | Active | NRND | Active | NRND |
Ключевые отличия
- Industry-standard 44-pin TQFP PIC16 platform (против PIC16F877A-I/PT)
- Low-voltage 2.5V operation versus standard PIC16C (против PIC16C774T-I/PT)
- 12-bit ADC versus 10-bit in F-series variants (против PIC16F877A-I/PT)
- Same 20MHz maximum clock across alternatives (против PIC16F877-04/PT)
Заметки по проектированию
The PIC16LC774T/PT operates from 2.5V to 5.5V with a typical supply current of 13 mA at 20 MHz and 5V. For stable ADC operation, place a 10 uF tantalum and 100 nF ceramic decoupling capacitor as close as possible to the VDD/VSS pins. Use separate analog and digital VDD planes if the PCB layout permits - connect them at a single point near the MCU. For battery-powered designs, leverage the PIC16LC's low-voltage capability (down to 2.5V) versus the standard PIC16C variant's 4.5V minimum.
The 44-pin TQFP (10x10 mm) package has a 0.8 mm pitch and exposed thermal pad on the bottom that should be soldered to a copper pour for improved thermal dissipation and mechanical reliability. Per Microchip AN1239 'PCB Design Guidelines for TQFP Packages', keep all four TQFP sides clear of components within 2 mm to allow proper solder paste application and inspection. Route clock traces (OSC1/OSC2) on the top layer with a ground guard trace to reduce EMI radiation.
OTP memory on the PIC16LC774T/PT cannot be erased or rewritten - any code bug locked into the part requires a complete re-spin. For prototype runs, use the UV-erasable PIC16LW774 (windowed CERDIP) or the Flash-based PIC16F877A-I/PT (pin-compatible, active). Also note that the PIC16C variant requires 4.5V minimum - substituting it into a 3.3V design will cause POR failures. Always verify the operating voltage range in the datasheet (DS30224E) before substitution.
When using the 12-bit ADC for precision measurement, add a 1 kHz to 10 kHz RC low-pass filter (typically 1 kohm + 100 nF) on each analog input to reject high-frequency noise that would otherwise alias into the ADC's 100 ksps bandwidth. For 4-20 mA current-loop inputs, convert to 0-5V with a 250 ohm precision resistor before the ADC input. Keep analog traces short and guarded by a ground plane to minimize capacitive coupling from switching digital signals on adjacent PORTB pins.
Информация о соответствии
RoHS and halogen-free status not explicitly stated in Verified Web Data; marked as unknown pending manufacturer datasheet confirmation. AEC-Q100 not applicable - this is a commercial-grade 8-bit MCU without automotive qualification. Lead-free TQFP packaging confirmed via Microchip ordering code structure.