PIC16LF74T-I/ML - 8-bit MCU, 7KB Flash, 44-QFN | Microchip
Артикул: PIC16LF74T-I/ML ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $9.2 | $9,20 |
| 10 | $8.45 | $84,50 |
| 100 | $7.62 | $762,00 |
| 500 | $6.88 | $3.440,00 |
| 1.000 | $6.15 | $6.150,00 |
PIC16LF74T-I/ML Обзор
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/Flash), data memory (RAM), and peripheral interfaces into one package. PIC microcontrollers from Microchip occupy the mid-range PIC16 family branch, sitting between baseline PIC10/12/16F5x devices and the high-performance PIC18 and dsPIC families. They are widely used in cost-sensitive and power-constrained embedded designs where deterministic interrupt latency and ultra-low standby current are critical. PIC16F7x MCUs in particular add hardware peripherals such as 8-channel 8-bit ADC, two Capture/Compare/PWM (CCP) modules, a USART, and a synchronous serial port (SSP) supporting SPI and I2C.
Key features of the PIC16LF74T-I/ML include 7 KB (4 K x 14 words) Flash program memory with self-programming capability, 192 bytes of data RAM, 33 digital I/O pins multiplexed with peripheral functions, an 8-channel 10-bit (rescaled) Analog-to-Digital Converter, two 8-bit timers plus one 16-bit timer, a Watchdog Timer with its own on-chip RC oscillator, and an enhanced USART. Brown-out Reset (BOR), Power-on Reset (POR), and low-power Sleep mode with sub-1 µA typical standby current make the LF variant especially attractive for battery-powered designs.
Typical applications include small-form-factor consumer electronics, sensor interface modules, low-power remote controls, LED driver controllers, battery chargers, HVAC auxiliary controls, and industrial sensor hubs where a small QFN footprint and wide operating voltage are required. The 44-pin QFN (ML) package measures only 8 mm x 8 mm, making it suitable when PCB real estate is tight and a PLCC or TQFP footprint cannot be used.
When designing with this MCU, ensure the MCLR reset line has a proper pull-up and decoupling network, and place a 100 nF bypass capacitor close to each VDD/VSS pair. Programming/debugging is done via ICSP using two pins (RB6/ICSPCLK, RB7/ICSPDAT), so leave these accessible. Compared with PIC16F73/74 parts, the LF variant extends operation down to 2.0 V at the cost of maximum CPU frequency (4 MHz at 2 V vs 20 MHz at 5 V).
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Аналоги без доработки для PIC16LF74T-I/ML — 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 PIC16LF74T-I/ML (тот же форм-фактор и посадочное место) — отличается по Package, Operating Temperature, Timers, ADC, CCP Modules.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC16LF73T-I/ML
✅ Прямая замена✓ В наличии
$3.17 / шт.
Открыть даташит →PIC16LF76T-I/ML
✅ Прямая замена✓ В наличии
$3.89 / шт.
Открыть даташит →PIC16LF77T-I/ML
✅ Прямая замена✓ В наличии
$4.77 / шт.
Открыть даташит →PIC16LF74-I/ML
✅ Прямая замена✓ В наличии
$5.4 / шт.
Открыть даташит →PIC16LF74-I/L
✅ Прямая замена✓ В наличии
$4.32 / шт.
Открыть даташит →PIC16F74T-I/ML
✅ Прямая замена✓ В наличии
$4.7 / шт.
Открыть даташит →PIC16LF74T-I/ML Максимальные параметры и электрические характеристики
| Core Architecture | PIC16 enhanced 8-bit RISC |
| Program Memory (Flash) | 7 KB (4 K x 14-bit words) |
| Data RAM | 192 bytes |
| I/O Pins | 33 |
| Корпус | 44-pin QFN (ML) 8x8 mm |
| Тип монтажа | Surface Mount |
| Operating Voltage Range | 2.0 V to 5.5 V |
| Maximum CPU Frequency | 20 MHz (at 5 V), 4 MHz (at 2 V) |
| Timers | 2x 8-bit + 1x 16-bit Timer/Counter |
| CCP Modules | 2 Capture/Compare/PWM |
| Communication | Enhanced USART, SSP (SPI / I2C) |
| Рабочая температура | -40C to +85C (Industrial, "I") |
| Статус RoHS | Compliant |
Конфигурация выводов PIC16LF74T-I/ML
| Контакт 1 | MCLR — Master Clear (Reset) input, active low |
| Контакт 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Контакт 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Контакт 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Контакт 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / Voltage Reference |
| Контакт 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Контакт 7 | RA5/AN4 — PORTA bit 5 / Analog input 4 |
| Контакт 8 | VSS — Ground reference |
| Контакт 9 | OSC1/CLKIN — Oscillator input / External clock input |
| Контакт 10 | OSC2/CLKOUT — Oscillator output / Clock output |
| Контакт 11 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| Контакт 12 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Контакт 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Контакт 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Контакт 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Контакт 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Контакт 17 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Контакт 18 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Контакт 19 | VSS — Ground reference |
| Контакт 20 | VDD — Positive supply voltage |
| Контакт 21 | RB0/INT — PORTB bit 0 / External interrupt |
| Контакт 22 | RB1 — PORTB bit 1 |
| Контакт 23 | RB2 — PORTB bit 2 |
| Контакт 24 | RB3 — PORTB bit 3 |
| Контакт 25 | RB4 — PORTB bit 4 |
| Контакт 26 | RB5 — PORTB bit 5 |
| Контакт 27 | RB6/ICSPCLK — PORTB bit 6 / ICSP clock |
| Контакт 28 | RB7/ICSPDAT — PORTB bit 7 / ICSP data |
| Контакт 29 | VSS — Ground reference |
| Контакт 30 | VDD — Positive supply voltage |
| Контакт 31 | RD0 — PORTD bit 0 |
| Контакт 32 | RD1 — PORTD bit 1 |
| Контакт 33 | RD2 — PORTD bit 2 |
| Контакт 34 | RD3 — PORTD bit 3 |
| Контакт 35 | RC4/SDI/SDA — PORTC bit 4 (alt, redundant) |
| Контакт 36 | RD5 — PORTD bit 5 |
| Контакт 37 | RD6 — PORTD bit 6 |
| Контакт 38 | RD7 — PORTD bit 7 |
| Контакт 39 | VSS — Ground reference |
| Контакт 40 | VDD — Positive supply voltage |
| Контакт 41 | RE0/RD — PORTE bit 0 / Parallel read |
| Контакт 42 | RE1/WR — PORTE bit 1 / Parallel write |
| Контакт 43 | RE2/CS — PORTE bit 2 / Parallel chip select |
| Контакт 44 | NC — Not connected (per datasheet) |
Типичное применение
PIC16LF74T-I/ML подходит для 7 применениеs: Battery-Powered Sensor Interface, Industrial Sensor Hub Module, Remote Control and IR Transmitter, LED Driver and Lighting Controller, HVAC Auxiliary Control Board, USB / Serial Bridge Device, Battery Charger and Fuel Gauge.
Battery-Powered Sensor Interface
The PIC16LF74T-I/ML is well suited for battery-powered sensor interface nodes because its 2.0 V minimum VDD allows direct connection to a single Li-ion cell (3.0 V nominal) or 2x AA cells (3.0 V), while Sleep current under 1 µA extends battery life to years. The 8-channel ADC interfaces with analog sensors (temperature, pressure, light) without an external analog front end, and the 33 I/O pins handle digital sensors and indicators. Compared to PIC16F74, the LF variant saves approximately 30-40% energy per measurement cycle.
Рекомендуется
Industrial Sensor Hub Module
In industrial 4-20 mA loop-powered sensor hubs, the PIC16LF74T-I/ML's 2.0 V minimum operation enables direct interface to loop-powered regulators without boost conversion. The enhanced USART and SSP peripherals support RS-485 or I2C sensor networks, while 192 bytes of RAM buffer real-time readings. The 44-pin QFN (ML) package measures only 8 mm x 8 mm, fitting dense DIN-rail modules where PCB area is constrained. Industrial temperature grade -40C to +85C matches process environment requirements.
Рекомендуется
Remote Control and IR Transmitter
For consumer remote controls and IR transmitter designs, the PIC16LF74T-I/ML provides 33 I/O to drive IR LEDs, matrix keypads, and indicator LEDs without external glue logic. The two CCP modules generate precise 38 kHz / 56 kHz carrier frequencies for IR protocols (RC5, NEC, SIRC) while the 16-bit timer captures incoming signals. Wide 2.0 V-5.5 V operation supports 2x AAA cells at 3.0 V, and Sleep current under 1 µA delivers multi-year battery life on shelf.
Рекомендуется
LED Driver and Lighting Controller
The PIC16LF74T-I/ML controls multi-channel LED drivers via its two CCP modules, generating PWM dimming signals at frequencies above 100 Hz to avoid visible flicker. With 33 I/O pins, the MCU can drive up to 16 channels of constant-current LED drivers through external shift registers. The 8-channel ADC monitors LED current and temperature for closed-loop thermal derating, while the 7 KB Flash stores dimming curves, color-mixing algorithms, and DMX-512 protocol handlers.
Рекомендуется
HVAC Auxiliary Control Board
In HVAC systems, the PIC16LF74T-I/ML serves as an auxiliary controller for damper actuators, fan speed control, and air-quality sensor reading. Its 8-channel ADC interfaces with NTC thermistors and pressure transducers; the USART communicates with the main thermostat over RS-485 or UART; and the wide 2.0 V-5.5 V range tolerates 24 VAC-derived unregulated supplies. Industrial -40C to +85C temperature grade covers rooftop and basement installations without derating.
Рекомендуется
USB / Serial Bridge Device
For low-cost USB-to-UART or USB-to-SPI bridge applications, the PIC16LF74T-I/ML uses its enhanced USART plus SSP (SPI) peripherals to interface with an external USB controller like the MCP2200 or MCP2221A. The MCU acts as the protocol translator, command processor, and GPIO controller, with 7 KB Flash storing USB HID class descriptors and command handlers. The 44-pin QFN (ML) footprint is small enough for thumb-drive form factors.
Рекомендуется
Battery Charger and Fuel Gauge
The PIC16LF74T-I/ML implements single-cell Li-ion or NiMH charge controllers using its ADC to monitor battery voltage, charge current, and temperature. The two CCP modules drive PWM charging waveforms with smooth current regulation, while the USART reports state-of-charge to a host system. Wide 2.0 V-5.5 V range supports direct connection to battery nodes without a boost regulator, and Sleep current under 1 µA preserves standby charge during storage.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC16LF74T-I/ML — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | PIC16LF73T-I/ML | PIC16LF76T-I/ML | PIC16LF77T-I/ML | PIC16F74T-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin QFN (ML) | 44-pin QFN (ML) - same | 44-pin QFN (ML) - same | 44-pin QFN (ML) - same | 44-pin QFN (ML) - same |
| Flash Memory | 7 KB | 4 KB | 14 KB | 14 KB | 7 KB |
| RAM | 192 bytes | 192 bytes | 368 bytes | 368 bytes | 192 bytes |
| Minimum VDD | 2.0 V (LF) | 2.0 V (LF) | 2.0 V (LF) | 2.0 V (LF) | 4.0 V (no LF) |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Ключевые отличия
- Wide 2.0 V-5.5 V operating range (LF family) (против PIC16F74T-I/ML)
- 44-pin QFN (ML) ultra-small footprint (против PIC16LF74-I/P (40-pin PDIP))
- On-chip enhanced USART and SSP peripherals (против PIC16LF73T-I/ML)
Заметки по проектированию
Place a 100 nF decoupling capacitor close to each VDD/VSS pair (the 44-pin QFN has 4 VDD/VSS pairs). Add a 10 µF bulk capacitor on the main VDD rail. For battery-powered designs, place a reverse-polarity protection diode (Schottky or P-FET) at the input and consider a 4.7 µF reservoir capacitor on the high-impedance VDD node to support voltage dips during transmit bursts.
The 44-pin QFN (ML) package has an exposed thermal pad (EP) on the underside that MUST be soldered to a PCB pad of at least equal area for mechanical reliability and thermal dissipation. Connect the EP to a quiet ground pour (VSS) using multiple thermal vias (typically 4-9 vias, 0.3 mm drill) to reduce ground impedance. QFN packages are more challenging to inspect than QFP, so use solder paste inspection and AOI to detect solder defects.
Do not exceed 20 MHz CPU frequency when VDD is below 4.5 V; the Fosc vs VDD derating curve in the datasheet shows 4 MHz at 2.0 V, 10 MHz at 3.0 V, and 20 MHz only at 4.5 V or higher. Configure the configuration bits (CONFIG1) for the correct oscillator mode (HS, XT, LP, or RC) before programming. Leaving the MCLR pin floating may cause spurious resets; always use a 10 kΩ pull-up to VDD and a 100 nF cap to ground for noise immunity.
When using the ADC, place a 100 nF capacitor close to AVdd (which on PIC16F7x shares the digital VDD pin). For high-impedance analog sources, add an op-amp buffer or sample-hold extension. Route analog traces away from digital switching lines (PWM outputs, oscillator) to avoid crosstalk. The 8-channel ADC has a recommended input impedance below 10 kΩ for full accuracy at the chosen sampling rate.
Информация о соответствии
RoHS compliant per Microchip product page. Lead-free reflow-compatible. Not AEC-Q100 qualified - choose PIC16F74 automotive variants for vehicle applications. Halogen-free per Microchip environmental compliance documentation.