PIC16LF74T-I/PT - 8-Bit MCU, 20MHz, 7KB Flash, 44-TQFP | Microchip
MPN: PIC16LF74T-I/PT ✓ Hoạt độngPIC16LF74T-I/PT Tóm tắt
An 8-bit microcontroller is a single-chip processor whose ALU, registers, and program counter operate on 8-bit data words. The PIC16F family is a classic Harvard-architecture core widely used in embedded control; microcontrollers sit in the system hierarchy below microprocessors and above discrete logic, serving as the "brains" of products from consumer appliances to industrial sensor nodes.
Key features of the PIC16LF74T-I/PT include 33 digital I/O pins, three 8-bit timer/counters with optional prescaler, two capture/compare/PWM (CCP) modules, an 8-bit 5-channel ADC, a USART with addressable mode, an MSSP port (SPI/I2C), and 192 bytes of RAM. Built-in peripherals include brown-out reset (BOR), power-on reset (POR), watchdog timer (WDT), and an ICD-2 in-circuit debugger interface.
The PIC16LF74 uses Microchip's 14-bit instruction-word, RISC-style core with a hardware multiplier-free instruction set, dual-bank linear program memory, and paged data memory. The 20 MHz oscillator delivers 5 MIPS peak throughput, and the nanoWatt technology offers selectable idle and sleep modes with wake-on-interrupt and ultra-low-power sleep currents for battery-powered designs.
Typical applications include industrial control panels, sensor signal conditioning, motor-driver logic boards, low-power instrumentation, remote-control units, and white-goods human-machine interfaces. The PIC16LF74's wide 2.0V-5.5V range, low-power modes, and mature peripheral set make it especially well suited to battery-backed devices and cost-sensitive embedded designs.
When designing with this MCU, reserve at least one I/O pin for the ICSP/ICD programming/debug interface (PGC/PGD), and choose an external crystal or internal RC oscillator mode carefully to balance timing accuracy against power consumption in sleep-mode applications.
This page synthesizes distributor pricing, drop-in alternative MPNs from Microchip's PIC16 family, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF74T-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16LF74T-I/PT (cùng hình factor và footprint) — khác nhau ở ADC, Timers, Package, Core Architecture, Operating Temperature.
PIC16LF74T-I/PTG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF74-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF747-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF707-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF1947-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF18877-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF74T-I/PT Tỷ lệ tối đa & tính chất điện
| Product Family | PIC16F |
| Core Architecture | 8-bit PIC16 |
| Instruction Word Width | 14-bit |
| Maximum CPU Frequency | 20 MHz |
| Peak Throughput | 5 MIPS |
| Program Memory (Flash) | 7 KB (4K x 14) |
| Data Memory (SRAM) | 192 bytes |
| Operating Voltage (Vdd) | 2.0 V to 5.5 V |
| I/O Pins | 33 |
| Timers | 3 x 8-bit timer/counters |
| Capture/Compare/PWM (CCP) | 2 modules |
| ADC | 8-bit, 5 channels |
| Serial Interfaces | USART, MSSP (SPI/I2C) |
| Hộp | 44-TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Trạng thái RoHS | Compliant |
| Special Features | Brown-out Reset, Power-on Reset, Watchdog Timer, ICD-2 debug |
Cấu hình chân PIC16LF74T-I/PT
| Chân 1 | RA0/AN0 — PORTA bit 0 / ADC channel 0 |
| Chân 2 | RA1/AN1 — PORTA bit 1 / ADC channel 1 |
| Chân 3 | RA2/AN2 — PORTA bit 2 / ADC channel 2 |
| Chân 4 | RA3/AN3/VREF — PORTA bit 3 / ADC channel 3 / VREF+ |
| Chân 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 6 | RA5/AN4/SS — PORTA bit 5 / ADC channel 4 / SPI slave select |
| Chân 7 | RE0/RD — PORTE bit 0 / Read control for parallel slave port |
| Chân 8 | RE1/WR — PORTE bit 1 / Write control for parallel slave port |
| Chân 9 | RE2/CS — PORTE bit 2 / Chip select for parallel slave port |
| Chân 10 | VDD — Positive supply voltage (2.0V to 5.5V) |
| Chân 11 | VSS — Ground reference |
| Chân 12 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Chân 13 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Chân 14 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 15 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| Chân 16 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Chân 17 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 18 | RD0/PSP0 — PORTD bit 0 / Parallel slave port bit 0 |
| Chân 19 | RD1/PSP1 — PORTD bit 1 / Parallel slave port bit 1 |
| Chân 20 | RD2/PSP2 — PORTD bit 2 / Parallel slave port bit 2 |
| Chân 21 | RD3/PSP3 — PORTD bit 3 / Parallel slave port bit 3 |
| Chân 22 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 23 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 24 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Chân 25 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Chân 26 | RD4/PSP4 — PORTD bit 4 / Parallel slave port bit 4 |
| Chân 27 | RD5/PSP5 — PORTD bit 5 / Parallel slave port bit 5 |
| Chân 28 | RD6/PSP6 — PORTD bit 6 / Parallel slave port bit 6 |
| Chân 29 | RD7/PSP7 — PORTD bit 7 / Parallel slave port bit 7 |
| Chân 30 | VSS — Ground reference |
| Chân 31 | VDD — Positive supply voltage (2.0V to 5.5V) |
| Chân 32 | RB0/INT — PORTB bit 0 / External interrupt input |
| Chân 33 | RB1 — PORTB bit 1 |
| Chân 34 | RB2 — PORTB bit 2 |
| Chân 35 | RB3/PGM — PORTB bit 3 / Low-voltage programming input |
| Chân 36 | RB4 — PORTB bit 4 |
| Chân 37 | RB5 — PORTB bit 5 |
| Chân 38 | RB6/PGC — PORTB bit 6 / ICSP clock (debugger) |
| Chân 39 | RB7/PGD — PORTB bit 7 / ICSP data (debugger) |
| Chân 40 | MCLR/VPP — Master clear reset / Programming voltage input |
| Chân 41 | RA6/OSC2/CLKO — PORTA bit 6 / Oscillator output / Clock output |
| Chân 42 | RA7/OSC1/CLKI — PORTA bit 7 / Oscillator input / Clock input |
| Chân 43 | RB0 — PORTB bit 0 (alternate function) |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16LF74T-I/PT phù hợp cho 7 Áp dụngs: Industrial Control Panel, Battery-Powered Sensor Node, Motor Driver Logic Board, White Goods HMI, Remote Control / RF Transmitter, Low-Cost Instrumentation, LED Lighting Controller.
Industrial Control Panel
The PIC16LF74T-I/PT's 33 I/O pins and proven PIC16F architecture make it well-suited for industrial control panels driving relays, opto-isolators, and status indicators. The 8-bit 5-channel ADC reads sensor signals from thermistors, pressure transducers, and potentiometers with adequate resolution for setpoint monitoring and fault detection. Operating from 2.0 V to 5.5 V allows direct connection to industrial 24 V buses via a switching pre-regulator, while the -40C to +85C industrial temperature range satisfies factory-floor specifications.
Được đề xuất
Battery-Powered Sensor Node
The PIC16LF74T-I/PT's low-voltage operation down to 2.0 V and nanoWatt sleep mode make it a good fit for battery-powered sensor nodes transmitting on a 2-cell alkaline or single-cell lithium supply. Sleep currents under 1 uA combined with the 192-byte RAM retention enable multi-year battery life in duty-cycled wake-measure-sleep patterns. The MSSP (SPI/I2C) port connects to sensors such as the MCP9808 temperature IC, while the USART provides a low-speed wireless link to sub-GHz transceivers for IoT telemetry.
Được đề xuất
Motor Driver Logic Board
With two CCP modules generating complementary PWM outputs and three 8-bit timer/counters, the PIC16LF74T-I/PT can manage brushed DC motor speed, stepper sequencing, or simple BLDC commutation in low-to-medium-power driver boards. The wide Vdd range supports 3.3 V logic-level FET bridges, while the brown-out reset and watchdog timer ensure safe startup and recovery from fault conditions in motor-control systems.
Được đề xuất
White Goods HMI
The PIC16LF74T-I/PT drives segment LCDs, keypads, and encoder inputs in appliances such as washing machines, dishwashers, and microwave oven user interfaces. With 33 I/O lines, it easily interfaces with 7-segment displays, triac control signals, and buzzer/LED indicators. The 5 MIPS throughput handles menu navigation, timer logic, and safety interlocks for IEC 60730-compliant appliance firmware.
Được đề xuất
Remote Control / RF Transmitter
The PIC16LF74T-I/PT's low power consumption and small 44-TQFP footprint suit handheld remote controls encoding sub-GHz OOK/FSK transmissions via SPI to a transmitter IC. The 8-bit core encodes IR/RF protocols such as RC-5, NEC, or proprietary protocols efficiently. Brown-out reset prevents lockups during battery end-of-life discharge.
Được đề xuất
Low-Cost Instrumentation
For low-cost digital multimeters, panel meters, and simple data loggers, the PIC16LF74T-I/PT provides the right balance of features and cost. The 8-bit ADC measures voltage/current with adequate resolution for consumer-grade instruments, and the USART outputs to PC or displays. nanoWatt sleep mode extends battery life in portable handheld meters that spend most of their time in standby.
Được đề xuất
LED Lighting Controller
The PIC16LF74T-I/PT drives multi-channel LED drivers via its PWM modules and USART-connected DMX/RDM receivers in architectural lighting fixtures. The 5 MIPS throughput enables smooth dimming curves and color-mixing algorithms for RGBW fixtures. Wide Vdd range allows direct 5 V operation from switching LED driver outputs while nanoWatt sleep reduces standby power below regulatory limits for connected lighting.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF74T-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16LF74T-I/PTG | PIC16LF74-I/PT | PIC16LF747-I/PT | PIC16LF707-I/PT | PIC16LF1947-I/PT | PIC16LF18877-I/PT |
|---|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 7 KB | 7 KB | 7 KB | 7 KB | 14 KB | 14 KB | 56 KB |
| Data SRAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 512 bytes | 1 KB | 4 KB |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| ADC Resolution / Channels | 8-bit / 5 channels | 8-bit / 5 channels | 8-bit / 5 channels | 10-bit / 8 channels | 10-bit / 14 channels | 10-bit / 17 channels | 10-bit / 24 channels |
| Lead-Free Finish (RoHS) | Yes (matte tin) | Yes (Pb-free) | Yes (Pb-free) | Yes (Pb-free) | Yes (Pb-free) | Yes (Pb-free) | Yes (Pb-free) |
| Unit Price (qty 1, USD) | 8.40 | 8.40 | 8.20 | 9.20 | 5.40 | 6.10 | 7.20 |
Bảo phân biệt quan trọng
- Wider Vdd range (2.0-5.5 V) than PIC16F74 (4.0-5.5 V) (vsPIC16F74T-I/PT)
- Enhanced 10-bit ADC upgrade path (vsPIC16LF747-I/PT)
- Lower power XLP technology upgrade path (vsPIC16LF1947-I/PT)
Ghi chú thiết kế
The PIC16LF74T-I/PT operates from 2.0 V to 5.5 V; place a 100 nF decoupling capacitor close to each Vdd pin (pins 10, 31) and a bulk 10 uF tantalum or ceramic on the main supply rail. For battery applications using 2-cell alkaline or single-cell Li chemistries, ensure the undervoltage lockout setting matches the battery end-of-life voltage (typically 2.0 V for alkaline, 3.0 V for Li primary) to prevent brown-out-induced data corruption in flash or EEPROM.
Route the ICSP pins (RB6/PGC = pin 38, RB7/PGD = pin 39, MCLR/Vpp = pin 40) so they are accessible for in-circuit programming and debugging. Avoid placing other signal traces too close to the OSC1/OSC2 pins (12-13) to minimize capacitive loading on the crystal. If using the internal RC oscillator instead of an external crystal, leave the OSC pins floating or tie them to a known state per datasheet.
Do not confuse PIC16LF74 (2.0-5.5 V) with PIC16F74 (4.0-5.5 V). Operating a PIC16F74 below 4.0 V can cause EEPROM corruption and erratic ADC readings. Also note: the 192 B RAM includes general-purpose registers; user data buffers must be allocated from the GPR area after bank selection, not the SFR area. Lastly, the MCLR pin (pin 40) requires a 10 kohm pull-up to Vdd if external reset is desired; leaving it floating causes unpredictable resets.
The PIC16LF74T-I/PT in the 44-pin TQFP package dissipates under 200 mW even at full 20 MHz clock and all peripherals active, so thermal management is generally not a concern. However, in enclosed industrial enclosures above 60 C ambient, verify theta_JA (~40 C/W for 44-TQFP) against worst-case power dissipation. For continuous high-temperature operation above 85 C, derate clock frequency or move to the PIC16LF1947-I/PT enhanced mid-range part with better thermal characteristics.
Thông tin tuân thủ
RoHS compliant per Microchip product page and DigiKey listing 443675. REACH compliant per EU Declaration of Conformity. Not AEC-Q100 qualified; this MCU is targeted at industrial and consumer markets, not automotive.