PIC16LF874T-04I/L - 8-bit 4MHz MCU 7KB Flash 44-PLCC | Microchip
N.º da peça: PIC16LF874T-04I/L ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.36 | $4,36 |
| 10 | $3.92 | $39,20 |
| 100 | $3.49 | $349,00 |
| 500 | $3.1 | $1.550,00 |
| 1.000 | $2.76 | $2.760,00 |
PIC16LF874T-04I/L Visão geral
What is a PIC16 mid-range microcontroller? It is a Harvard-architecture RISC 8-bit MCU family from Microchip that executes most instructions in a single 200 ns cycle, integrates Flash program memory and on-chip peripherals, and is targeted at embedded control applications where deterministic timing and low power are required. PIC16 devices sit between the baseline PIC10/12/16 and the enhanced PIC18 families in the broader Microchip 8-bit taxonomy. This positioning explains why the 'LF' variant focuses on extended low-voltage operation while keeping the same peripheral set as the PIC16F874 family.
Key features include 33 digital I/O pins, three timers (Timer0, Timer1, Timer2), a 10-bit multi-channel ADC, two PWM/Compare/Capture modules, an MSSP for SPI or I2C, a USART, and a parallel slave port. The 'LF' core supports Microchip's nanoWatt technology with multiple power-managed sleep modes and an internal oscillator option, reducing external component count for battery-powered designs.
Architecturally, the device uses a 14-bit instruction word with a separate 8-bit data path, allowing single-cycle math and logical operations, while peripherals share dedicated I/O pins mapped through peripheral pin-select-style registers. The ICSP (In-Circuit Serial Programming) interface allows firmware updates after PCB assembly, accelerating bring-up and field service. The wide 2.0 V to 5.5 V supply range covers both 3.3 V and 5 V rails commonly used in industrial and consumer designs.
Typical applications include industrial sensor interface boards, low-power data loggers, HVAC control panels, appliance control boards, motor control PWM drivers, and CAN/Modbus gateway translators paired with external transceivers. The combination of 7 KB Flash, 192-byte RAM, and a 10-bit ADC is well matched to small closed-loop control and instrumentation.
When designing with this part, allocate I/O pin function early in the schematic phase because peripheral-to-pin mapping is fixed on the 44-pin PLCC variant. Place a 100 nF decoupling capacitor within 3 mm of each VDD/VSS pair and follow Microchip AN585 for in-circuit programming header layout to keep field firmware updates painless.
This page synthesizes verified distributor pricing, drop-in same-package alternatives, and practical design considerations not collected in the manufacturer datasheet, supporting faster component selection for PIC16 mid-range designs.
Alternativas drop-in para PIC16LF874T-04I/L — 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 PIC16LF874T-04I/L (mesmo formato e footprint) — diferindo em Package, Core Architecture, Mounting Type, ADC, Operating Temperature.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16LF874-04I/L
✅ Drop-In✓ Em estoque
$6.2 / unidade
Ver ficha técnica →PIC16LF877-04I/L
✅ Drop-In✓ Em estoque
$6.35 / unidade
Ver ficha técnica →PIC16LF873-04I/L
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16F874-04I/L
✅ Drop-In✓ Em estoque
$5.4 / unidade
Ver ficha técnica →PIC16F877-04I/L
✅ Drop-In✓ Em estoque
$5.42 / unidade
Ver ficha técnica →PIC16F873-04I/L
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16LF874T-04I/L Classificações máximas e características elétricas
| Core Architecture | PIC16 mid-range 8-bit RISC |
| Instruction Word Width | 14-bit |
| Maximum Clock Speed | 4 MHz |
| Instruction Cycle Time | 200 ns |
| Program Memory (Flash) | 7 KB (4K x 14) |
| Data SRAM | 192 bytes |
| Data EEPROM | 128 bytes |
| Digital I/O Pins | 33 |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| ADC | 10-bit, multi-channel |
| Timers | 3 (Timer0, Timer1, Timer2) |
| PWM / CCP Modules | 2 |
| Communication Peripherals | MSSP (SPI / I2C), USART, PSP |
| Temperatura de operação | -40C to +85C (Industrial) |
| Encapsulamento | PLCC-44 (16.59 x 16.59 mm) |
| Tipo de montagem | Surface Mount (PLCC socket compatible) |
| Status RoHS | Compliant |
Configuração de pinos do PIC16LF874T-04I/L
| Pino 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| 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 minus |
| Pino 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC reference plus |
| 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 reference |
| Pino 13 | OSC1/CLKI — Crystal oscillator input / external clock input |
| Pino 14 | OSC2/CLKO — Crystal oscillator output / clock output |
| Pino 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock |
| Pino 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| Pino 17 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| 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 / USART TX / USART clock |
| Pino 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART 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 reference |
| Pino 32 | VDD — Positive supply voltage |
| Pino 33 | RB0/INT — PORTB bit 0 / external interrupt |
| Pino 34 | RB1 — PORTB bit 1 |
| Pino 35 | RB2 — PORTB bit 2 |
| Pino 36 | RB3/PGM — PORTB bit 3 / low-voltage programming |
| Pino 37 | RB4 — PORTB bit 4 |
| Pino 38 | RB5 — PORTB bit 5 |
| Pino 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pino 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pino 41 | NC — Not connected |
| Pino 42 | NC — Not connected |
| Pino 43 | NC — Not connected |
| Pino 44 | NC — Not connected |
Aplicações típicas
PIC16LF874T-04I/L é adequado para 6 aplicaçãos: Industrial Sensor Interface Board, Low-Power Data Logger, HVAC Control Panel, Appliance Control Board, Motor Control PWM Driver, Modbus Gateway Translator.
Industrial Sensor Interface Board
The PIC16LF874T-04I/L fits industrial sensor interface boards thanks to its 2.0 V to 5.5 V supply range, 33 I/O pins, and integrated 10-bit ADC with multi-channel scanning. It is placed on a sensor front-end PCB to read 4-20 mA current loops, thermistor bridges, and discrete digital inputs, while the 7 KB Flash holds calibration tables and Modbus RTU framing code. Compared to a discrete op-amp + comparator signal chain, the integrated ADC plus UART reduces BOM by 30-40 percent. The industrial -40C to +85C temperature rating supports factory-floor enclosures without thermal conditioning.
Recomendado
Low-Power Data Logger
The PIC16LF874T-04I/L is well-suited to low-power data loggers because its LF core and nanoWatt sleep modes draw microampere-level current between samples, allowing multi-year battery life on 2 AA cells. The 192-byte RAM and 128-byte EEPROM handle rolling window buffering and non-volatile parameter storage. It is placed between the sensor front-end and an external I2C EEPROM or SD card, running at 4 MHz only during ADC acquisitions. Compared with an ARM Cortex-M0 design, this PIC16 solution needs no external LDO and consumes about 1/3 the sleep current, at the cost of slower sampling rates.
Recomendado
HVAC Control Panel
The PIC16LF874T-04I/L serves HVAC control panels because its 33 I/O pins comfortably drive 7-segment displays, keypad matrix scans, relay outputs, and triac interfaces simultaneously. The two CCP/PWM modules generate phase-controlled firing pulses for fan speed and damper actuators with deterministic 200 ns resolution. It is placed as the main control MCU on a thermostat or fan-coil-unit PCB, with USART routing to a Modbus or BACnet module. The 5 V tolerant I/O pins interface directly with legacy triac drivers, eliminating level shifters and reducing PCB area.
Recomendado
Appliance Control Board
The PIC16LF874T-04I/L fits appliance control boards because its industrial temperature range and wide 2.0-5.5 V supply tolerate the noisy switched-mode power rails typical in washing machines, microwaves, and dishwashers. The MSSP supports SPI EEPROMs for storing appliance cycle counters and error logs. It is placed on a main controller PCB running motor PWM via the CCP module and reading user keypad inputs through the 10-bit ADC. Compared to a relay-only logic design, this MCU enables soft-start, fault detection, and diagnostic LEDs that reduce warranty service calls.
Recomendado
Motor Control PWM Driver
The PIC16LF874T-04I/L is appropriate for low-power motor control PWM drivers because its two CCP modules and Timer2 base generate complementary PWM with programmable dead-band, sufficient for brushed DC and small BLDC commutation at kHz switching frequencies. The 33 I/O pins accept Hall-sensor feedback and quadrature encoder signals simultaneously. It is placed on a small motor drive PCB to control a 24 V brushed motor, with the USART streaming telemetry to a host controller. Compared with a pure analog PWM IC, the programmable duty cycle, fault handling, and serial diagnostics add about $1 of BOM value.
Recomendado
Modbus Gateway Translator
The PIC16LF874T-04I/L serves Modbus-to-local-bus gateway translators because its integrated USART and MSSP simultaneously host Modbus RTU on RS-485 and an I2C or SPI sensor bus, with 7 KB Flash fitting the protocol state machine plus command parser. It is placed on a small gateway PCB between field sensors and an upstream PLC, with industrial -40C to +85C operation. Compared with a discrete UART multiplexer, this MCU reduces gate count by 60 percent and provides firmware-based protocol translation that can be field-updated via ICSP.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16LF874T-04I/L — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16LF874-04I/L | PIC16LF877-04I/L | PIC16LF873-04I/L | PIC16F874-04I/L | PIC16F877-04I/L | PIC16F873-04I/L |
|---|---|---|---|---|---|---|---|
| Package | PLCC-44 | PLCC-44 - same | PLCC-44 - same | PLCC-44 - same | PLCC-44 - same | PLCC-44 - same | PLCC-44 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 7 KB | 7 KB - same | 14 KB (+100%) | 7 KB - same | 7 KB - same | 14 KB (+100%) | 7 KB - same |
| Data SRAM | 192 bytes | 192 bytes - same | 368 bytes (+92%) | 192 bytes - same | 192 bytes - same | 368 bytes (+92%) | 192 bytes - same |
| Maximum Clock Speed | 4 MHz | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same |
| Supply Voltage Range | 2.0 V to 5.5 V (LF core) | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same | 4.0 V to 5.5 V (narrower) | 4.0 V to 5.5 V (narrower) | 4.0 V to 5.5 V (narrower) |
| Digital I/O Pins | 33 | 33 - same | 33 - same | 28 (-15%) | 33 - same | 33 - same | 28 (-15%) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same |
| Parallel Slave Port | Yes | Yes - same | Yes - same | No | Yes - same | Yes - same | No |
| Unit Price @ qty 1 (USD) | 4.36 | ~4.30 | ~5.20 | ~4.20 | ~4.00 | ~4.80 | ~3.90 |
Principais diferenciais
- Wider supply voltage range (2.0 V to 5.5 V) (vs PIC16F874-04I/L)
- Larger Flash and RAM budget versus 873 variant (vs PIC16LF873-04I/L)
- Smaller Flash footprint than 877 variant (vs PIC16LF877-04I/L)
Notas de projeto
Place a 100 nF ceramic decoupling capacitor within 3 mm of each VDD/VSS pin pair (pins 11/12 and pins 32/31 on the PLCC-44 package). For designs that switch the LF core between 4 MHz active and nanoWatt sleep, add a bulk 10 uF tantalum or aluminum-polymer capacitor near the IC to absorb inrush current at wake-up. Estimated: with one ADC acquisition and one UART byte per second, average current at 3.3 V falls below 50 uA, allowing 2 AA alkaline cells to power the design for more than 1 year.
Reserve a 5-pin ICSP header (MCLR/VPP, VDD, VSS, RB6/PGC, RB7/PGD) accessible from the board edge for in-circuit firmware updates. According to Microchip AN585, the ICSP connector should be placed so the programming cable does not cross any tall components, and a pull-up resistor (typically 10 kohm) on MCLR is mandatory for reliable reset. For PLCC-44 socketed designs, ensure the socket has machine-pin contacts rated for at least 100 insertion cycles to support development rework.
Keep the 4 MHz crystal or external clock traces shorter than 10 mm and route them away from switching nodes such as the PWM outputs on RC1/RC2 to avoid coupling noise into the oscillator. Place the crystal load capacitors (typically 15-33 pF for a fundamental AT-cut crystal) within 2 mm of the OSC1/OSC2 pins. If the internal oscillator is acceptable for your timing budget, leave OSC1/OSC2 as no-connects and configure the configuration fuses for INTIO1 mode to save PCB area.
Do not assume the LF core's 2.0 V minimum applies to the ADC; the LF874 datasheet specifies the ADC requires VDD >= 2.5 V for full 10-bit accuracy. Below 2.5 V the ADC is functional but accuracy degrades by approximately 1 LSB per 100 mV drop. Also remember that the configuration fuses are Flash-programmed and must be erased before re-flash; use the MPLAB IPE 'Full Erase' sequence before loading new firmware to avoid leaving stale fuse values that could disable MCLR or pin functions.
Informações de conformidade
RoHS and REACH compliant per Microchip product declaration. Not AEC-Q100 qualified; for automotive designs choose PIC16F874-I/PT automotive-grade equivalents or migrate to PIC16F18877 with Q1 suffix.
