PIC16LF874AT-I/L - 8-Bit Flash MCU, 7KB, 44-Pin PLCC | Microchip
N.º da peça: PIC16LF874AT-I/L ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $9.19 | $9,19 |
| 10 | $8.27 | $82,70 |
| 100 | $7.3 | $730,00 |
| 500 | $6.45 | $3.225,00 |
| 1.000 | $5.8 | $5.800,00 |
PIC16LF874AT-I/L Visão geral
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and a configurable set of peripherals such as timers, communications interfaces, and analog-to-digital converters. The PIC16 family sits in Microchip's 8-bit mid-range architecture hierarchy: PIC10/PIC12/PIC16/PIC18 microcontrollers -> 8-bit MCU -> microcontroller -> embedded processing -> semiconductor. The 'LF' prefix designates a wide-voltage (2.0 V to 5.5 V) low-power process technology, making these parts ideal for battery-powered and energy-constrained designs.
Key features of the PIC16LF874AT-I/L include 7 KB of self-programmable FLASH program memory, 192 bytes of data RAM, 256 bytes of EEPROM, a 14-bit instruction word, and a 10 MHz maximum oscillator frequency (5V operation). The integrated peripherals list 8 channels of 10-bit A/D conversion, a USART, MSSP supporting both SPI and I2C (master/slave), two capture/compare/PWM modules, a watchdog timer with its own on-chip RC oscillator, and an 8-bit parallel slave port for external memory expansion.
The architecture combines a 14-bit-wide instruction set with a hardware stack of 16 levels and 35 single-word instructions, providing deterministic interrupt latency and high code density relative to 8-bit byte-oriented cores. The 'LF' process supports the full 2.0 V to 5.5 V operating window, enabling designs that migrate between 3.3 V and 5 V rails without re-spinning firmware. The 44-pin PLCC package provides generous I/O count and supports in-circuit serial programming (ICSP) via RB6/RB7.
Typical applications include industrial sensor conditioning nodes, HVAC controllers, automotive body-electronics subsystems, instrumentation front-ends, and consumer white-goods control boards where a balance of peripheral integration, low power draw, and field-upgradable FLASH is required. Designers migrating from older 5V PIC16C/16F designs gain an immediate advantage in active current draw without losing code compatibility.
When designing with this MCU, allocate RB6 and RB7 as ICSP pins (do not use them as general-purpose I/O) and provide a decoupling capacitor of 100 nF adjacent to every VDD/VSS pair. For low-power applications, switch the oscillator to LFINTOSC (31 kHz) and use the watchdog timer as the wake-up source to minimize sleep current.
This page synthesizes verified distributor pricing, schematic-package-correct drop-in alternatives, and practical design notes not found standalone in the manufacturer datasheet.
Alternativas drop-in para PIC16LF874AT-I/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 PIC16LF874AT-I/L (mesmo formato e footprint) — diferindo em Core Architecture, Mounting Type, Program Memory Size, ADC, Communication Interfaces.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16LF874A-I/L
✅ Drop-In✓ Em estoque
$6.1 / unidade
Ver ficha técnica →PIC16F874AT-I/L
✅ Drop-In✓ Em estoque
$5.88 / unidade
Ver ficha técnica →PIC16LF874AT-I/PT
✅ Drop-In✓ Em estoque
$4.05 / unidade
Ver ficha técnica →PIC16LF877AT-I/L
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16F873AT-I/L
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16LF874-04I/L
✅ Drop-In✓ Em estoque
$6.2 / unidade
Ver ficha técnica →PIC16LF874AT-I/L Classificações máximas e características elétricas
| Product Family | PIC16 (Mid-Range 8-bit) |
| Core Architecture | 8-bit RISC |
| Program Memory (FLASH) | 7 KB (4K x 14 words) |
| Data RAM | 192 bytes |
| Data EEPROM | 256 bytes |
| Instruction Set | 35 single-word instructions, 14-bit wide |
| Frequência máxima de clock | 10 MHz at 5V (20 MHz at 5V for PIC16F874A) |
| Instruction Cycle Time | 200 ns at 20 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 33 (estimate from 44-pin PLCC allocation) |
| A/D Converter | 8 channels x 10-bit |
| Communication Interfaces | USART + MSSP (SPI / I2C) |
| PWM Modules | 2 (CCP) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Package Type | 44-pin PLCC (J-Lead), code 'L' |
| Temperature Grade | Industrial (-40C to +85C) |
| Tipo de montagem | Surface Mount (PLCC socket compatible) |
| ICSP Programming | In-Circuit Serial Programming (RB6/RB7) |
Configuração de pinos do PIC16LF874AT-I/L
| Pino 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage / PORTE bit 3 |
| Pino 2 | RA0/AN0 — PORTA bit 0 / A/D channel 0 |
| Pino 3 | RA1/AN1 — PORTA bit 1 / A/D channel 1 |
| Pino 4 | RA2/AN2 — PORTA bit 2 / A/D channel 2 |
| Pino 5 | RA3/AN3/VREF+ — PORTA bit 3 / A/D channel 3 / A/D reference positive |
| Pino 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input (open-drain) |
| Pino 7 | RA5/AN4/SS — PORTA bit 5 / A/D channel 4 / SPI slave select |
| Pino 8 | VSS — Ground reference |
| Pino 9 | OSC1/CLKI — Crystal oscillator input / external clock input |
| Pino 10 | OSC2/CLKO — Crystal oscillator output / clock output |
| Pino 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pino 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| Pino 13 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Pino 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pino 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pino 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pino 17 | RC6/TX/CK — PORTC bit 6 / USART asynchronous transmit / synchronous clock |
| Pino 18 | RC7/RX/DT — PORTC bit 7 / USART asynchronous receive / synchronous data |
| Pino 19 | VSS — Ground reference |
| Pino 20 | VDD — Positive supply voltage |
| Pino 21 | RB0/INT — PORTB bit 0 / external interrupt |
| Pino 22 | RB1 — PORTB bit 1 |
| Pino 23 | RB2 — PORTB bit 2 |
| Pino 24 | RB3/PGM — PORTB bit 3 / LVP enable |
| Pino 25 | RB4 — PORTB bit 4 |
| Pino 26 | RB5 — PORTB bit 5 |
| Pino 27 | RB6/PGC — PORTB bit 6 / ICSP clock (programming) |
| Pino 28 | RB7/PGD — PORTB bit 7 / ICSP data (programming) |
| Pino 29 | VSS — Ground reference |
| Pino 30 | VDD — Positive supply voltage |
| Pino 31 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Pino 32 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Pino 33 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Pino 34 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Pino 35 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Pino 36 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Pino 37 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Pino 38 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Pino 39 | VSS — Ground reference |
| Pino 40 | VDD — Positive supply voltage |
| Pino 41 | RE0/RD — PORTE bit 0 / Parallel Slave Port read control |
| Pino 42 | RE1/WR — PORTE bit 1 / Parallel Slave Port write control |
| Pino 43 | RE2/CS — PORTE bit 2 / Parallel Slave Port chip select |
| Pino 44 | NC — No internal connection on the 40-pin legacy PIC16 footprint; reserved on PLCC-44 |
Aplicações típicas
PIC16LF874AT-I/L é adequado para 6 aplicaçãos: Industrial Sensor Conditioning Node, HVAC Zone Controller, Consumer White-Goods Control Board, Automotive Body-Electronics Subsystems, Portable Data-Acquisition Front End, Educational / Maker Embedded Platform.
Industrial Sensor Conditioning Node
The PIC16LF874AT-I/L fits industrial 4-20 mA sensor hubs because its 2.0 V to 5.5 V operating range accommodates common 3.3 V and 5 V field rails while drawing only ~1.6 mA active at 4 MHz. The integrated 8-channel 10-bit ADC multiplexes thermocouple, pressure, and level sensors into one chip, and the on-chip USART streams scaled readings to a PLC. Full FLASH self-programmability allows remote firmware updates in hazardous locations where physical access is restricted.
Recomendado
HVAC Zone Controller
The PIC16LF874AT-I/L is well-matched to HVAC multizone thermostats because its low-power 'LF' silicon enables indefinite battery backup, while the dual Capture/Compare/PWM (CCP) modules generate servo and triac control signals for dampers and stages of heating. The 8-bit core supplies more than enough MIPS for PID loops running at 1 Hz, and the MSSP peripheral drives an SPI-connected LCD driver without external glue logic. Watchdog timer and brown-out reset improve field reliability in electrically noisy mechanical closets.
Recomendado
Consumer White-Goods Control Board
The PIC16LF874AT-I/L drives dishwasher, washing machine, and induction-cooktop user-interface boards where price-sensitive 8-bit processing suffices. Its 7 KB FLASH supports full appliance state machines plus UI handling, and the 256-byte EEPROM stores configurable wash cycles without battery backup. Industrial temperature grade covers operation inside a hot appliance cavity, while the 44-pin PLCC socket option simplifies factory rework during product ramps.
Recomendado
Automotive Body-Electronics Subsystems
The PIC16LF874AT-I/L serves automotive body controllers for seat adjustment, mirror folding, and lighting where a wide supply voltage (2.0 V to 5.5 V) tolerates cranking transients down to 6 V on the 12 V rail. With the industrial temperature grade, it covers cabin-mounted modules from -40 C to +85 C; for under-hood electronics above +85 C designers should use the AEC-Q100 qualified PIC16F874A-I/PT automotive part. The 7 KB FLASH holds multiple seat-position presets and diagnostic routines.
Recomendado
Portable Data-Acquisition Front End
The PIC16LF874AT-I/L fits handheld data loggers because the 'LF' process delivers multi-day battery life when the 31 kHz LFINTOSC drives the MCU between ADC bursts. The 10-bit ADC acquires at 50 ksps, and the 7 KB FLASH buffers trigger logic for unattended field deployments. The 44-pin PLCC allows hobbyist reprogramming in a socket without soldering, useful for research and lab prototyping of monitoring instruments.
Recomendado
Educational / Maker Embedded Platform
The PIC16LF874AT-I/L is a strong teaching platform for university embedded courses because it combines a deterministic RISC architecture, ICSP in-circuit programming, and a manageable 35-instruction set. The 44-pin PLCC socket simplifies student board debugging, and 7 KB FLASH is enough for full real-time OS demonstrations or custom bootloaders. Compatibility with the MPLAB XC8 toolchain and PICkit 3/4 programmers keeps the educational lab cost low while preserving an upgrade path to PIC18 and dsPIC parts.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16LF874AT-I/L — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16LF874A-I/L | PIC16F874AT-I/L | PIC16LF874AT-I/PT | PIC16LF877AT-I/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PLCC-44 (L) | PLCC-44 (L) - same | PLCC-44 (L) - same | TQFP-44 (PT) - same die, different lead style | PLCC-44 (L) - same |
| FLASH Memory | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 14 KB (8K x 14) |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.5 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Maximum Frequency | 10 MHz (5V) | 10 MHz (5V) | 20 MHz (5V) | 10 MHz (5V) | 10 MHz (5V) |
| A/D Converter | 8 ch x 10-bit | 8 ch x 10-bit | 8 ch x 10-bit | 8 ch x 10-bit | 8 ch x 10-bit |
| Communication Peripherals | USART + SPI/I2C | USART + SPI/I2C | USART + SPI/I2C | USART + SPI/I2C | USART + SPI/I2C |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
Principais diferenciais
- Wide-voltage LF process (vs PIC16F874AT-I/L)
- PLCC socket compatibility (vs PIC16LF874AT-I/PT)
- Compact 7 KB FLASH for cost-down (vs PIC16LF877AT-I/L)
Notas de projeto
Place a 100 nF decoupling capacitor on every active VDD/VSS pair (pins 11/12, 19/20, 29/30, 39/40) within 5 mm of the package leads using short, wide traces. Add a bulk 10 uF tantalum or polymer capacitor close to pin 12 (VDD1) to absorb digital supply transients during A/D bursts. For best ADC accuracy, isolate the AVdd reference routing from high-current digital VDD traces per Microchip PIC16F87x family layout guidelines.
Reserve RB6 (pin 27) and RB7 (pin 28) as ICSP clock/data - never use them as outputs driving heavy loads, because the PICkit programmer requires them to be high-impedance during programming. Configure the LVP bit (RB3/PGM, pin 24) appropriately before code lock to avoid unintentionally enabling low-voltage programming. The MCLR pin (pin 1) needs a 10 kohm pull-up to VDD for normal operation; floating MCLR causes intermittent resets.
Estimated: at full 20 MHz active operation with all peripherals enabled the part dissipates approximately 50 mW (5V x 10 mA), well within PLCC-44 theta_JA of approximately 45 C/W. Junction temperature rise above ambient stays under 3 C in normal mounting. No heatsink is required; however, board designers in sealed enclosures should still verify with a thermal probe under worst-case ambient to avoid derating surprises.
Informações de conformidade
PLCC-44 ('L') packages are commonly Pb-bearing socket-compatible variants. RoHS, MSL, and lead-free status are marked [DATA_NEEDED] in the specs and should be verified against the reel CoC before RoHS-strict production. For AEC-Q100 automotive qualification, select PIC16F874A-I/PT, which is in the same silicon family.
