PIC16LC774T/PT - 8-Bit 20MHz OTP MCU 7KB Flash | Microchip
MPN: PIC16LC774T/PT ✗ Son Kullanım ZamanıPIC16LC774T/PT Genel Bakış
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.
Drop-in alternatifler için PIC16LC774T/PT — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller PIC16LC774T/PT (aynı form faktörü ve ayağa oturma) — farklı olan ADC, Program Memory Size, Core Architecture, Instruction Cycle Time, Maximum Clock Frequency.
PIC16LC774-I/PT
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →PIC16F877A-I/PT
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →PIC16C774T-I/PT
✅ Yerleştirme📋 Katalogda Olmayan Referans Alternatifi
PIC16F877-04/PT
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →PIC16C765-I/PT
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →PIC16LC774T/PT Maksimum Değerlendirmeler & Elektriksel Özellikler
| Product Family | PIC16 8-bit Microcontroller |
| Core | PIC 8-bit RISC |
| CPU Architecture | Harvard, 8-bit data path |
| Azami Saat Hızı | 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 |
| İşletim Sıcaklığı | 0C to +70C (commercial) |
| Paket | 44-pin TQFP (10x10 mm) |
| Montaj Türü | Surface Mount |
| Instruction Set | 35 single-word instructions |
| Instruction Cycle | Single cycle (branches: 2 cycles) |
| Oscillator Type | External |
PIC16LC774T/PT 44-pin tqfp (10x10 mm) Pin Yapısı Kılavuzu
PIC16LC774T/PT (44-pin tqfp (10x10 mm) paket) için pin yapısı. Bu dijital IC, GPIO, iletişim arayüzleri (UART, SPI, I2C) ve güç pinleri içerir. Alternatif pin işlevleri ve yapılandırma seçenekleri için üretici veri kitapçığını referans alın. Tünel sistem tasarımı ve PCB yerleşimi için temel bir bileşendir.
Ayrıntılı pin çıkış verisi mevcut değil: PIC16LC774T/PT.
Aşağıdaki veri sayfası tam pin konfigürasyonu için.
Tipik Uygulamalar
PIC16LC774T/PT için uygundur 6 uygulamas: 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.
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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.
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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.
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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.
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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.
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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.
Önerilen
Önerilen Ürünler Özeti
Mühendislik referans verileri: PIC16LC774T/PT — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | 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 |
Ana Farklılayıcılar
- Industry-standard 44-pin TQFP PIC16 platform (karşılaştırma:PIC16F877A-I/PT)
- Low-voltage 2.5V operation versus standard PIC16C (karşılaştırma:PIC16C774T-I/PT)
- 12-bit ADC versus 10-bit in F-series variants (karşılaştırma:PIC16F877A-I/PT)
- Same 20MHz maximum clock across alternatives (karşılaştırma:PIC16F877-04/PT)
Tasarım Notları
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.
Uyumluluk Bilgisi
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.