PIC16LF74-I/PTG - 8-Bit 20MHz MCU 7KB Flash 44-TQFP | Microchip
N.º da peça: PIC16LF74-I/PTG ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $8.5 | $8,50 |
| 10 | $7.65 | $76,50 |
| 100 | $6.8 | $680,00 |
| 500 | $6.1 | $3.050,00 |
| 1.000 | $5.45 | $5.450,00 |
PIC16LF74-I/PTG Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, program memory (ROM/FLASH), working RAM, digital I/O, and on-chip peripherals such as timers, capture/compare modules, and communication interfaces. The 8-bit MCU category sits beneath the broader semiconductor hierarchy: MCU -> microcontroller -> embedded processor -> semiconductor IC. The PIC16F mid-range family specifically uses a 14-bit instruction word and Harvard architecture, and the PIC16LF74 belongs to this family.
Key differentiating features include 7KB of in-system self-programmable FLASH (4K x 14 words), 192 bytes of data RAM, three timers, dual analog comparators, and a 10-bit ADC with up to 8 channels (per family datasheet). The 'LF' prefix denotes an extended low-voltage variant (2.0V VDDmin), distinguishing it from the standard PIC16F74 (4.0V VDDmin). The 44-pin TQFP package exposes 33 I/O lines plus oscillator, reset, and power pins, supporting a broad peripheral footprint.
Technical depth: the PIC16LF74 uses an enhanced mid-range 8-bit core with 35 instructions, single-cycle execution at 20 MHz (200 ns instruction cycle), and a hardware multiplier unavailable in baseline PIC cores. The device supports In-Circuit Serial Programming (ICSP) via two pins (RB6/RB7) and In-Circuit Debugger (ICD) on the same pins, simplifying field updates and development without removing the chip.
Typical applications include industrial control panels, sensor signal conditioning front-ends, low-cost motor-driver sub-controllers, automotive body and lighting controllers, and embedded data-acquisition nodes where a low-voltage, low-pin-count 8-bit MCU suffices. The 7KB FLASH supports moderate control-loop code plus a small protocol stack.
Design consideration: at 20 MHz from 5V, power dissipation remains modest (tens of mW), but adequate decoupling (100 nF + 10 uF near VDD/AVDD) and a stable clock source (crystal or internal RC) are required for reliable ADC accuracy. Watchdog timer and brown-out reset (BOR) should be enabled for industrial environments.
This page synthesizes distributor pricing, drop-in PIC16 family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternativas drop-in para PIC16LF74-I/PTG — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC16LF74-I/PTG (mesmo formato e footprint) — diferindo em ADC, Package, Timers, Core Architecture, I/O Pins.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16F74-I/PT
✅ Drop-In✓ Em estoque
$5.55 / unidade
Ver ficha técnica →PIC16LF747-I/PT
✅ Drop-In✓ Em estoque
$4.21 / unidade
Ver ficha técnica →PIC16LF77-I/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$6.85 / unidade
Ver ficha técnica →PIC16F873A-I/PT
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PIC16F874A-I/PT
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PIC16LF74-I/PTG Classificações máximas e características elétricas
| Product Family | PIC16F (mid-range 8-bit) |
| Core | 8-bit RISC, 14-bit instruction word, Harvard |
| Program Memory (FLASH) | 7 KB (4K x 14 words) |
| Data RAM | 192 bytes |
| Frequência máxima de clock | 20 MHz |
| Instruction Cycle Time | 200 ns (at 20 MHz) |
| Operating Voltage (VDD) | 2.0 V to 5.5 V (LF low-voltage family) |
| I/O Pins | 33 digital I/O |
| ADC | 10-bit, up to 8 channels (per family datasheet) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Analog Comparators | 2 |
| Communication Peripherals | AUSART, MSSP (SPI/I2C) (per family datasheet) |
| Encapsulamento | 44-pin TQFP (10x10 mm) |
| Tipo de montagem | Surface Mount |
| Temperatura de operação | -40C to +85C (industrial, 'I' suffix) |
| ICSP / ICD | Yes (RB6/RB7) |
| Status RoHS | Compliant (Pb-free) |
Configuração de pinos do PIC16LF74-I/PTG
| Pino 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage / PORTE bit 3 |
| Pino 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pino 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pino 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC reference negative |
| Pino 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC reference positive |
| Pino 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pino 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Pino 8 | RE0/RD/AN5 — PORTE bit 0 / Parallel port read / Analog input 5 |
| Pino 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel port write / Analog input 6 |
| Pino 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel port chip select / Analog input 7 |
| Pino 11 | VDD — Positive supply voltage |
| Pino 12 | VSS — Ground |
| Pino 13 | OSC1/CLKIN — Oscillator input / external clock input |
| Pino 14 | OSC2/CLKOUT — Oscillator output / clock output |
| Pino 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pino 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 module |
| Pino 17 | RC2/CCP1 — PORTC bit 2 / CCP1 module |
| Pino 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pino 19 | RD0/PSP0 — PORTD bit 0 / Parallel slave port bit 0 |
| Pino 20 | RD1/PSP1 — PORTD bit 1 / Parallel slave port bit 1 |
| Pino 21 | RD2/PSP2 — PORTD bit 2 / Parallel slave port bit 2 |
| Pino 22 | RD3/PSP3 — PORTD bit 3 / Parallel slave port bit 3 |
| Pino 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pino 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pino 25 | RC6/TX/CK — PORTC bit 6 / AUSART transmit / clock |
| Pino 26 | RC7/RX/DT — PORTC bit 7 / AUSART receive / data |
| Pino 27 | RD4/PSP4 — PORTD bit 4 / Parallel slave port bit 4 |
| Pino 28 | RD5/PSP5 — PORTD bit 5 / Parallel slave port bit 5 |
| Pino 29 | RD6/PSP6 — PORTD bit 6 / Parallel slave port bit 6 |
| Pino 30 | RD7/PSP7 — PORTD bit 7 / Parallel slave port bit 7 |
| Pino 31 | VSS — Ground |
| Pino 32 | VDD — Positive supply voltage |
| Pino 33 | RB0/INT — PORTB bit 0 / External interrupt input |
| Pino 34 | RB1 — PORTB bit 1 |
| Pino 35 | RB2 — PORTB bit 2 |
| Pino 36 | RB3 — PORTB bit 3 |
| Pino 37 | RB4 — PORTB bit 4 |
| Pino 38 | RB5 — PORTB bit 5 |
| Pino 39 | RB6/PGC — PORTB bit 6 / ICSP clock / ICD clock |
| Pino 40 | RB7/PGD — PORTB bit 7 / ICSP data / ICD data |
| Pino 41 | NC — Not connected (no internal bond) |
| Pino 42 | NC — Not connected (no internal bond) |
| Pino 43 | NC — Not connected (no internal bond) |
| Pino 44 | NC — Not connected (no internal bond) |
Aplicações típicas
PIC16LF74-I/PTG é adequado para 6 aplicaçãos: Industrial Control Panel PLCs, Automotive Body and Lighting Controllers, Sensor Signal Conditioning Front-Ends, Low-Cost Motor Driver Sub-Controllers, Embedded Data Acquisition Nodes, HVAC and Building Automation Sub-Systems.
Industrial Control Panel PLCs
The PIC16LF74-I/PTG fits industrial control panels where 7KB FLASH and 33 I/O pins drive relays, sensors, and HMI keypads. Its 2.0V-5.5V VDD supports 24V->5V regulated rails common in PLC backplanes. The AUSART and MSSP peripherals handle Modbus RTU (RS-485) master communication via an external transceiver, while the 10-bit ADC reads 4-20mA loopback sensors through a current-sense amplifier. Industrial temperature grade (-40C to +85C) and brown-out reset (BOR) deliver the reliability demanded by IEC 61131-2 environments.
Recomendado
Automotive Body and Lighting Controllers
The PIC16LF74-I/PTG is well suited to interior body and lighting modules - seat controllers, mirror adjusters, ambient lighting drivers, and CAN/LIN sub-nodes. Its 20 MHz core and 7KB FLASH handle LIN protocol stacks and PWM lighting routines within automotive electrical transient envelopes. The industrial-grade -40C to +85C temperature range covers cabin environments; for under-hood modules migrate to AEC-Q100-qualified PIC16F equivalents. The 33 I/O lines drive multiple LED channels via MOSFET drivers and read switch matrix inputs through pin-change interrupts.
Recomendado
Sensor Signal Conditioning Front-Ends
The PIC16LF74-I/PTG serves as a low-cost analog front-end MCU, reading 4-20mA current loops, RTD/thermocouple amplified signals, and bridge sensor outputs via its 8-channel 10-bit ADC. Its 192B RAM and 7KB FLASH fit digital filtering (moving average, Kalman-lite) plus linearization routines. The 2 analog comparators enable threshold detection for alarm outputs without CPU overhead, while the AUSART streams conditioned data to upstream PLCs or IoT gateways at 9600-115200 baud. Low-voltage operation (2.0V-5.5V) suits battery-powered remote sensor nodes.
Recomendado
Low-Cost Motor Driver Sub-Controllers
The PIC16LF74-I/PTG drives small BLDC, stepper, and DC motors as a sub-controller offloading commutation and PID from a higher-tier MCU. Its 3 timers provide time bases for PWM generation at up to 20 MHz / 2 = 10 MHz PWM clock, sufficient for 20 kHz switching frequencies. The CCP module captures encoder feedback for closed-loop speed control, while 33 I/O drive H-bridge gate drivers, current sense amplifiers, and tachometer inputs. The 7KB FLASH fits trapezoidal commutation tables and soft-start ramps.
Recomendado
Embedded Data Acquisition Nodes
The PIC16LF74-I/PTG powers battery-operated remote data loggers reading temperature, humidity, and vibration sensors with sample rates up to 100 kSps aggregate. Its 8-channel ADC and 192B RAM buffer sensor bursts before AUSART transmission, while 7KB FLASH accommodates SD card FAT16 drivers or simple compression algorithms. Sleep current in the microamp range enables multi-year battery life on 2x AA cells. ICSP on RB6/RB7 permits field firmware updates without disassembly.
Recomendado
HVAC and Building Automation Sub-Systems
The PIC16LF74-I/PTG operates as a zone controller for HVAC dampers, VAV boxes, and thermostat sub-systems, where its 33 I/O lines drive TRIAC controls, read NTC thermistors, and communicate via Modbus or BACnet MS/TP over RS-485. Industrial temperature rating (-40C to +85C) handles unconditioned mechanical rooms. The PIC16LF74's 2.0V VDDmin permits 3.3V-only designs, reducing power consumption versus 5V PIC16F74 in always-on building controllers.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16LF74-I/PTG — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16F74-I/PT | PIC16LF747-I/PT | PIC16LF77-I/PT | PIC16F873A-I/PT | PIC16F874A-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Program Memory (FLASH) | 7 KB | 7 KB | 7 KB | 14 KB | 7 KB | 7 KB |
| Data RAM | 192 bytes | 192 bytes | 192 bytes | 368 bytes | 192 bytes | 192 bytes |
| I/O Pins | 33 | 33 | 36 | 33 | 28 | 33 |
| Operating Voltage (VDD) | 2.0V to 5.5V | 4.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 11 channels | 10-bit, 8 channels | 10-bit, 5 channels | 10-bit, 8 channels |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
Principais diferenciais
- Extended low-voltage operation (2.0V-5.5V) (vs PIC16F74-I/PT)
- Pin-compatible upgrade path within Microchip PIC16F family (vs PIC16F873A-I/PT)
- Mature, well-documented 8-bit mid-range core (vs PIC16LF77-I/PT)
Notas de projeto
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD/VSS pin pair (pins 11/12 and 31/32) to suppress switching noise on the digital supply. Add a bulk 10 uF tantalum or aluminum-polymer capacitor near the MCU for transient response during ADC bursts. Estimated: with 33 I/O toggling at 10 MHz and an internal oscillator, average supply current stays below 25 mA at 5V - well within the chip's 250 mW power budget.
At 20 MHz, 5V, all I/O toggling, power dissipation is approximately 100 mW. The 44-TQFP package has a theta_JA around 50 C/W, yielding a junction temperature rise of only 5C above ambient. No heatsink is required for normal industrial operation; ensure ambient does not exceed 85C to preserve the industrial-grade spec. Estimated: based on typical PIC16F7x datasheet power tables.
Always configure the MCLR pin with a 10 kohm pull-up to VDD; floating MCLR causes spurious resets in noisy industrial environments. Enable the Brown-Out Reset (BOR) in the configuration word to protect against VDD brown-outs during motor inrush events. For ADC accuracy, place the analog reference (VREF+/VREF-) traces away from switching digital lines and use a guard ring around analog input pins to reduce digital crosstalk.
Informações de conformidade
RoHS compliant per Pb-free 'G' suffix on order code. Not AEC-Q100 qualified; for AEC-Q100 automotive applications use PIC16F equivalent from Microchip automotive portfolio.