PIC16F74T-I/ML - 8-bit 20MHz 7KB Flash MCU | Microchip
N.º de pieza: PIC16F74T-I/ML ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6.95 | $6,95 |
| 10 | $6.4 | $64,00 |
| 100 | $5.8 | $580,00 |
| 500 | $5.2 | $2.600,00 |
| 1.000 | $4.7 | $4.700,00 |
PIC16F74T-I/ML Descripción general
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, RAM, peripheral set, and I/O ports. The PIC16F74 belongs to Microchip's mid-range PIC16 family, a 14-bit instruction-set architecture positioned between the baseline PIC10/12/16F5x family and the enhanced PIC18 family in cost, performance, and peripheral richness. PIC16 mid-range devices are widely used in industrial control, consumer appliances, and automotive body modules because of their deterministic instruction timing, low power consumption, and upward code compatibility from earlier PIC families.
Key features include 8 channels of 8-bit A/D conversion with 2 additional input channels, a synchronous serial port (SSP) supporting SPI and I2C, a USART with 9-bit address masking, two 8-bit timers plus one 16-bit timer, a watchdog timer with on-chip RC oscillator, and in-circuit serial programming (ICSP) capability. The wide operating voltage range of 4.0 V to 5.5 V and industrial temperature range of -40 °C to +85 °C make the PIC16F74 suitable for harsh environments.
Typical applications span industrial control panels, sensor interface modules, motor-drive supervisory logic, HVAC controllers, security and alarm systems, and consumer white goods. The 33 I/O pins and flexible peripheral mix allow the device to act as a system supervisor coordinating analog sensors, keypad input, LCD drive, and serial communication to a host controller.
Designers should note that the PIC16F73 and PIC16F74 differ only in pin count and I/O count; the PIC16F76/77 add 8 more I/O and more A/D channels. The /ML exposed-pad variant requires thermal pad soldering to the PCB for proper electrical grounding and thermal dissipation.
Alternativas directas para PIC16F74T-I/ML — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC16F74T-I/ML (mismo factor de forma y huella) — difiere en Package, Serial Interfaces, Timers, Operating Temperature, Program Memory Size.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC16F74T-E/ML
✅ Sustitución directa✓ En stock
$5.2 / unidad
Ver hoja de datos →PIC16F74-I/ML
✅ Sustitución directa✓ En stock
$3.86 / unidad
Ver hoja de datos →PIC16F74-E/ML
✅ Sustitución directa✓ En stock
$5.8 / unidad
Ver hoja de datos →PIC16F77-I/ML
✅ Sustitución directa✓ En stock
$3.95 / unidad
Ver hoja de datos →PIC16F747-I/ML
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$3.65 / unidad
Ver hoja de datos →PIC16F74T-I/ML Valores máximos y características eléctricas
| Product Type | 8-bit Microcontroller (MCU) |
| Family | PIC16F (Mid-Range 14-bit core) |
| Program Memory Size | 7 KB (4K x 14 words) FLASH |
| RAM Size | 192 x 8 bytes |
| Maximum CPU Speed | 20 MHz |
| Instruction Execution Time | 200 ns (at 20 MHz) |
| Number of I/O Pins | 33 |
| A/D Converter | 8 channels, 8-bit (with 2 additional inputs) |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Serial Interfaces | SSP (SPI / I2C), USART (with 9-bit) |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| In-Circuit Programming | ICSP |
| Operating Voltage | 4.0 V to 5.5 V |
| Temperatura de funcionamiento | -40 °C to +85 °C (Industrial, I grade) |
| Encapsulado | 44-pin QFN Exposed Pad (44-VQFN EP, ML suffix) |
| Tipo de montaje | Surface Mount |
| Packaging | Tape & Reel (TR, /ML suffix) |
| Estado RoHS | Compliant |
| Lead-Free | Yes |
Configuración de pines de PIC16F74T-I/ML
| Pin 1 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Pin 2 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Pin 3 | RA2/AN2 — Digital I/O / Analog input channel 2 |
| Pin 4 | RA3/AN3/VREF — Digital I/O / Analog input 3 / ADC reference |
| Pin 5 | RA4/T0CKI — Digital I/O / Timer 0 clock input |
| Pin 6 | RA5/AN4/SS — Digital I/O / Analog input 4 / SPI slave select |
| Pin 7 | RE0/RD/AN5 — Digital I/O / Parallel slave port read / Analog input 5 |
| Pin 8 | RE1/WR/AN6 — Digital I/O / Parallel slave port write / Analog input 6 |
| Pin 9 | RE2/CS/AN7 — Digital I/O / Parallel slave port chip select / Analog input 7 |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | VSS — Ground |
| Pin 12 | OSC1/CLKIN — Crystal/Resonator or external clock input |
| Pin 13 | OSC2/CLKOUT — Crystal/Resonator or clock output |
| Pin 14 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / Timer1 clock input |
| Pin 15 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 |
| Pin 16 | RC2/CCP1 — Digital I/O / CCP1 (PWM) |
| Pin 17 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Pin 18 | RD0 — Digital I/O / Parallel slave port data bit 0 |
| Pin 19 | RD1 — Digital I/O / Parallel slave port data bit 1 |
| Pin 20 | RD2 — Digital I/O / Parallel slave port data bit 2 |
| Pin 21 | RD3 — Digital I/O / Parallel slave port data bit 3 |
| Pin 22 | RD4 — Digital I/O / Parallel slave port data bit 4 |
| Pin 23 | RD5 — Digital I/O / Parallel slave port data bit 5 |
| Pin 24 | RD6 — Digital I/O / Parallel slave port data bit 6 |
| Pin 25 | RD7 — Digital I/O / Parallel slave port data bit 7 |
| Pin 26 | VSS — Ground |
| Pin 27 | VDD — Positive supply voltage |
| Pin 28 | RB0/INT — Digital I/O / External interrupt |
| Pin 29 | RB1 — Digital I/O |
| Pin 30 | RB2 — Digital I/O |
| Pin 31 | RB3 — Digital I/O |
| Pin 32 | RB4 — Digital I/O |
| Pin 33 | RB5 — Digital I/O |
| Pin 34 | RB6/PGC — Digital I/O / ICSP clock |
| Pin 35 | RB7/PGD — Digital I/O / ICSP data |
| Pin 36 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Pin 37 | RC5/SDO — Digital I/O / SPI data out |
| Pin 38 | RC6/TX/CK — Digital I/O / USART transmit / clock |
| Pin 39 | RC7/RX/DT — Digital I/O / USART receive / data |
| Pin 40 | MCLR/VPP — Master clear reset / ICSP programming voltage |
| Pin 41 | AVDD — Analog positive supply voltage |
| Pin 42 | AVSS — Analog ground |
| Pin 43 | NC — Not connected (per datasheet QFN pinout) |
| Pin 44 | EP — Exposed thermal pad - tie to VSS for thermal/grounding |
Aplicaciones típicas
PIC16F74T-I/ML es adecuado para 6 aplicacións: Industrial Control Panels, Sensor Interface Modules, Appliance Control Boards, Security and Alarm Systems, HVAC Controllers, Motor-Drive Supervisory Logic.
Industrial Control Panels
The PIC16F74T-I/ML fits industrial control panel designs because it combines 33 digital I/O, an 8-channel 8-bit ADC, and SPI/I2C/USART serial interfaces in a compact 44-VQFN EP package. Its 4.0-5.5 V supply and -40 to +85 C industrial range let it sit alongside 24 V-signal conditioning circuitry. The exposed thermal pad reduces junction temperature in enclosed cabinets where airflow is limited. The PIC16F74's deterministic 200 ns instruction timing simplifies the timing analysis required for safety-relevant logic in panel controllers.
Recomendado
Sensor Interface Modules
For multi-sensor analog front-end modules, the PIC16F74T-I/ML delivers 8 ADC channels with two additional analog inputs, ample for temperature, pressure, and flow transducers after signal conditioning. The 192-byte SRAM is sufficient for averaging and threshold logic on each channel, and the USART enables digital transmission to a host PLC. The 5 V supply is ideal for legacy 5 V sensor ecosystems, and the ICSP interface allows field firmware updates. The exposed pad QFN package keeps the footprint below 9 mm x 9 mm, allowing dense sensor-node PCBs.
Recomendado
Appliance Control Boards
White-goods appliance controllers (washers, dishwashers, ovens) benefit from the PIC16F74T-I/ML's 33 I/O for keypad, LED, and relay drive, plus its PWM-friendly CCP module for motor speed or heating-element control. The 20 MHz CPU with hardware multiplier support handles UI state machines and safety interlocks deterministically. The wide 4.0-5.5 V supply tolerates rectified 5 V rails common in appliance SMPS designs, and the industrial temperature rating covers under-cabinet thermal rise.
Recomendado
Security and Alarm Systems
The PIC16F74T-I/ML is well suited to alarm-panel logic: 33 I/O can scan multiple PIR, door, and glass-break zones, the USART with 9-bit addressing talks to a keypad or GSM module, and the SSP port in I2C mode connects to EEPROM for event logging. Its low power-down current supports battery-backed operation, and the watchdog timer with on-chip RC oscillator provides robust recovery from brownouts. The 44-QFN EP package enables slim panel enclosures.
Recomendado
HVAC Controllers
In heating, ventilation, and air-conditioning controllers the PIC16F74T-I/ML coordinates temperature sensors (via the 8-channel ADC), drives triac-controlled fans through optoisolators, and displays status on character LCDs through parallel I/O. The 16-bit timer delivers accurate PWM for variable-speed blower control, and the synchronous serial port interfaces to wireless or wired thermostats. Industrial temperature rating and 5 V tolerance fit rooftop unit electronics with wide thermal swings.
Recomendado
Motor-Drive Supervisory Logic
As a supervisory MCU in brushed-DC or stepper motor drives, the PIC16F74T-I/ML reads feedback from Hall sensors or incremental encoders, monitors current shunt amplifiers, and asserts enable/FAULT lines to gate drivers. Its 33 I/O accommodate fault multiplexing, brake control, and host-side CAN or RS-485 communication. The 200 ns instruction execution supports fast over-current reaction times, and the exposed thermal pad keeps the supervisor cool when mounted near power-stage heat sinks.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC16F74T-I/ML — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC16F74T-E/ML | PIC16F74-I/ML | PIC16F74-E/ML | PIC16F77-I/ML | PIC16F747-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-VQFN EP (ML) | 44-VQFN EP (ML) - same | 44-VQFN EP (ML) - same | 44-VQFN EP (ML) - same | 44-VQFN EP (ML) - same | 44-VQFN EP (ML) - same |
| Program Memory | 7 KB FLASH | 7 KB FLASH | 7 KB FLASH | 7 KB FLASH | 14 KB FLASH | 7 KB FLASH |
| RAM | 192 B | 192 B | 192 B | 192 B | 368 B | 192 B |
| I/O Pins | 33 | 33 | 33 | 33 | 40 | 33 |
| ADC | 8-ch 8-bit | 8-ch 8-bit | 8-ch 8-bit | 8-ch 8-bit | 8-ch 8-bit | 8-ch 8-bit |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Temperature | -40 C to +85 C (I) | -40 C to +125 C (E) | -40 C to +85 C (I) | -40 C to +125 C (E) | -40 C to +85 C (I) | -40 C to +85 C (I) |
| Packaging | Tape & Reel | Tape & Reel | Tube | Tube | Tube | Tube |
Diferenciadores clave
- Tape-and-reel packaging optimized for high-volume SMT assembly (frente a PIC16F74-I/ML)
- Industrial temperature grade coverage without extended-range cost (frente a PIC16F74T-E/ML)
- 8-channel 8-bit ADC with two additional analog inputs (frente a PIC16F73-I/SO)
Notas de diseño
The 44-VQFN EP package exposes a large thermal pad (pin 44) that MUST be soldered to the PCB ground pour for proper heat sinking and electrical grounding. Estimated: with a 4-layer 1-oz copper 44-QFN land pattern, theta_JA is roughly 28 C/W; at 25 mA active and 5 V the device dissipates ~125 mW, yielding a 3.5 C rise - well within the 125 C junction limit, but enclosed industrial enclosures should still verify with thermocouple measurement.
Place a 0.1 uF decoupling capacitor within 3 mm of each VDD/VSS pair (pins 10-11 and 26-27) and a 10 uF bulk capacitor near the MCLR/VPP pin. The AVDD/AVSS pins (41/42) require a dedicated 0.1 uF + 10 uF filter for ADC noise rejection. Keep the crystal traces to OSC1/OSC2 short and surround them with a ground guard ring to avoid injection of switching noise into the 20 MHz oscillator.
Do not leave MCLR floating - it must be pulled high through a 10 kohm resistor to VDD for normal operation, or driven high by the ICSP programmer. Brown-out reset (BOR) should be enabled in the configuration word for industrial designs to recover from supply dips below 4.0 V. When migrating from PIC16F73 firmware, verify CCP and timer port assignments since the PIC16F74 has additional ports D and E that map differently.
Route the analog signals (RA0-RA5, RE0-RE2) away from the high-current digital lines on PORTD. The parallel slave port (PSP) on PORTD can inject fast edge rates; isolate with a ground trace or place analog inputs on PORTE where possible. Keep the ICSP clock/data lines (RB6/RB7) accessible for in-circuit programming during bring-up.
Información de cumplimiento
RoHS compliant and lead-free per Microchip product declaration. Not AEC-Q100 qualified - choose the automotive-grade PIC16F74-E/ML or PIC18F family for AEC-Q100 requirements.
