PIC16C74BT-04I/PQ - 8-bit MCU, 7KB OTP, 4MHz, 44-MQFP | Microchip
N.º da peça: PIC16C74BT-04I/PQ ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $9.5 | $9,50 |
| 10 | $8.55 | $85,50 |
| 100 | $7.65 | $765,00 |
| 500 | $6.85 | $3.425,00 |
| 1.000 | $6.1 | $6.100,00 |
PIC16C74BT-04I/PQ Visão geral
A microcontroller (MCU) is a single-chip computer that contains a CPU, non-volatile program memory, working RAM, and configurable peripherals. Within the broader semiconductor taxonomy, the PIC16C74BT-04I/PQ sits in the 8-bit mid-range MCU category, which itself is a subset of the embedded microcontroller family, sitting below 16-bit and 32-bit MCUs in computational throughput but excelling in deterministic interrupt response, low cost, and ease of programming. OTP memory means the device is programmed once at production; for re-programmable equivalents, the PIC16F74 in the flash-based PIC16F family is the modern counterpart.
Key features include 33 digital I/O pins, three serial communication peripherals (I2C/SPI, SPI, and UART/USART), an 8-channel 8-bit ADC, Brown-out Detect and Power-On Reset (POR) for robust supply supervision, and a wide 2.5V to 6.0V operating voltage range. The device supports external oscillator operation, allowing the system designer to choose crystal, resonator, or RC oscillator sources matched to EMI and timing requirements.
The PIC16C74BT-04I/PQ is built on Microchip's CMOS, fully-static mid-range architecture, providing low power consumption and instruction execution in a single instruction cycle (excluding branches). With 14-bit instruction width, code density is excellent, allowing rich peripheral interaction in 7KB of memory. The integrated ADC with eight channels makes analog sensor interfacing straightforward without external components.
Typical applications include industrial control systems, appliance and HVAC controllers, automotive body electronics, instrumentation front-ends with analog inputs, and embedded sensor hubs requiring UART or SPI host communication. Because the part is OTP, it is best suited to mature, high-volume products where the firmware is finalized and ongoing field updates are not required.
Designers should pay attention to the difference between the -04 speed grade (4 MHz) and the -20 speed grade (20 MHz) within the same family; this variant runs at 4 MHz maximum oscillator frequency. The 'T' suffix indicates tape-and-reel packaging, and 'I' indicates the industrial temperature grade.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes - including pin-compatibility analysis across the PIC16C74B and PIC16C73B families - that are not consolidated in any single manufacturer datasheet or distributor listing.
Alternativas drop-in para PIC16C74BT-04I/PQ — 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 PIC16C74BT-04I/PQ (mesmo formato e footprint) — diferindo em Package, Core Architecture, Serial Interfaces, Timers, Program Memory Size.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16C74BT-04/PQ
✅ Drop-In✓ Em estoque
$5.6 / unidade
Ver ficha técnica →PIC16C74BT-04E/PQ
✅ Drop-In✓ Em estoque
$7.9 / unidade
Ver ficha técnica →PIC16C74B-04/PQ
✅ Drop-In✓ Em estoque
$7.25 / unidade
Ver ficha técnica →PIC16C74B-04I/PQ
✅ Drop-In✓ Em estoque
$1.78 / unidade
Ver ficha técnica →PIC16C74B-04E/PQ
✅ Drop-In✓ Em estoque
$9.95 / unidade
Ver ficha técnica →ATMEGA8515L-8AUR
✅ Drop-In✓ Em estoque
$1.98 / unidade
Ver ficha técnica →PIC16C74BT-04I/PQ Classificações máximas e características elétricas
| Core Architecture | 8-bit PIC16CXX mid-range |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7KB (4K x 14 words) |
| Data RAM | 192 x 8 bytes |
| Frequência máxima de clock | 4 MHz |
| Operating Voltage Range | 2.5 V to 6.0 V |
| Number of I/O Pins | 33 |
| ADC | 8-channel, 8-bit |
| Communication Peripherals | I2C/SPI, SPI, UART/USART |
| Encapsulamento | 44-MQFP (10x10 mm), 'PQ' designator |
| Tipo de montagem | Surface Mount |
| Temperature Grade | Industrial (-40C to +85C) |
| Oscillator Type | External |
| Reset / Supervision | Brown-out Detect, Power-On Reset (POR) |
| Instruction Width | 14 bits |
| Instruction Cycle | 1 cycle (4 clock periods) |
| Process Technology | CMOS, fully static |
Configuração de pinos do PIC16C74BT-04I/PQ
| Pino 1 | MCLR/Vpp — Master Clear (reset) input / programming voltage |
| Pino 2 | RA0/AN0 — PORTA bit 0 / ADC analog input 0 |
| Pino 3 | RA1/AN1 — PORTA bit 1 / ADC analog input 1 |
| Pino 4 | RA2/AN2 — PORTA bit 2 / ADC analog input 2 |
| Pino 5 | RA3/AN3/VREF — PORTA bit 3 / ADC input 3 / voltage reference |
| Pino 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pino 7 | RA5/AN4/SS — PORTA bit 5 / ADC input 4 / SPI slave select |
| Pino 8 | RE0/RD — PORTE bit 0 / parallel port read control |
| Pino 9 | RE1/WR — PORTE bit 1 / parallel port write control |
| Pino 10 | RE2/CS — PORTE bit 2 / parallel port chip select |
| Pino 11 | VDD — Positive supply voltage |
| Pino 12 | VSS — Ground reference |
| Pino 13 | OSC1/CLKIN — External oscillator input / clock in |
| Pino 14 | OSC2/CLKOUT — External oscillator output / clock out |
| Pino 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / clock in |
| Pino 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| Pino 17 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM1 |
| Pino 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pino 19 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pino 20 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pino 21 | RC6/TX/CK — PORTC bit 6 / UART transmit / clock |
| Pino 22 | RC7/RX/DT — PORTC bit 7 / UART receive / data |
| Pino 23 | RD0 — PORTD bit 0 |
| Pino 24 | RD1 — PORTD bit 1 |
| Pino 25 | RD2 — PORTD bit 2 |
| Pino 26 | RD3 — PORTD bit 3 |
| Pino 27 | RD4 — PORTD bit 4 |
| Pino 28 | RD5 — PORTD bit 5 |
| Pino 29 | RD6 — PORTD bit 6 |
| Pino 30 | RD7 — PORTD 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 — PORTB bit 3 |
| 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 | AN5 — ADC analog input 5 |
| Pino 42 | AN6 — ADC analog input 6 |
| Pino 43 | AN7 — ADC analog input 7 |
| Pino 44 | NC — Not connected (per datasheet) |
Aplicações típicas
PIC16C74BT-04I/PQ é adequado para 7 aplicaçãos: Industrial Control Systems, Appliance and HVAC Controllers, Automotive Body Electronics, Instrumentation Front-Ends, Embedded Sensor Hubs, Consumer Electronics Controllers, Educational and Development Platforms.
Industrial Control Systems
The PIC16C74BT-04I/PQ fits industrial control boards where its 33 digital I/O can drive relays, switches, and status LEDs while the 8-channel 8-bit ADC reads analog sensors. With a 4 MHz mid-range core executing most instructions in one cycle and Brown-out Detect plus Power-On Reset, the part tolerates noisy 24V-derived 5V rails. Industrial temperature grade (-40C to +85C) supports factory floor enclosures without derating.
Recomendado
Appliance and HVAC Controllers
The PIC16C74BT-04I/PQ drives compressor, fan, and valve control loops in white-goods and HVAC systems. Its UART/USART interfaces to a wall thermostat or display panel, while the I2C/SPI bus reads temperature and humidity sensors. With 192 bytes of RAM and a 4 MHz instruction rate, the part handles PID loops and user-interface scanning in real time, and the 2.5V to 6.0V Vdd range accommodates rectified 5V rails typical in appliance power supplies.
Recomendado
Automotive Body Electronics
Body-control modules for lighting, mirror, and seat positioning benefit from the PIC16C74BT-04I/PQ's 33 I/O and 8-bit ADC. SPI/UART links connect to BCM bus masters and remote switch panels. While this part is OTP-only and not AEC-Q100 qualified, design teams using it for non-safety automotive subsystems find the 4 MHz core deterministic for switch debouncing and PWM generation. Industrial temperature grade covers in-cabin environments.
Recomendado
Instrumentation Front-Ends
Bench-top meters, panel indicators, and process-control instruments use the PIC16C74BT-04I/PQ for analog conditioning and display driving. Its 8-channel ADC samples up to 4 inputs at the part's throughput, supporting temperature, pressure, and 4-20 mA loop conversions. The 7KB OTP holds calibration tables and menu logic; UART outputs to a host PC or external display controller. Brown-out Detect prevents corrupted readings during supply dips.
Recomendado
Embedded Sensor Hubs
Distributed sensor nodes for environmental monitoring use the PIC16C74BT-04I/PQ as a low-cost aggregator. Its UART links to a wireless module (XBee, LoRa) while the I2C/SPI bus reads multiple digital sensors. At 4 MHz with CMOS static design, current draw is minimal between samples. The 33 I/O drives status LEDs and control outputs, and the 192-byte RAM stores sample buffers and protocol framing.
Recomendado
Consumer Electronics Controllers
The PIC16C74BT-04I/PQ powers mature consumer products where the firmware is finalized and OTP is acceptable: exercise equipment, kitchen appliances, and toy controllers. Its UART/I2C/SPI set interfaces to displays, audio chips, and user inputs. The 7KB OTP holds full application code including menu logic and motor-control routines; industrial temp grade covers indoor and sheltered-outdoor use cases.
Recomendado
Educational and Development Platforms
Universities and training labs use the PIC16C74BT-04I/PQ as a teaching vehicle for mid-range 8-bit MCU fundamentals. Its instruction set, 14-bit word width, and rich peripheral set provide a complete learning target before graduates move to 32-bit platforms. With 33 I/O on the 44-MQFP footprint, breakout boards expose enough pins for breadboard prototyping, and the OTP memory enforces good code-revision discipline in coursework.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16C74BT-04I/PQ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16C74BT-04/PQ | PIC16C74BT-04E/PQ | PIC16C74B-04/PQ | PIC16C74B-04I/PQ | PIC16C74B-04E/PQ | ATMEGA8515L-8AU |
|---|---|---|---|---|---|---|---|
| Package | 44-MQFP (PQ) 10x10 mm | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-TQFP (AU) - same footprint class |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology (Atmel legacy) |
| Core Architecture | 8-bit PIC mid-range | 8-bit PIC mid-range | 8-bit PIC mid-range | 8-bit PIC mid-range | 8-bit AVR | ||
| Program Memory | 7KB OTP (4K x 14) | 7KB OTP | 7KB OTP | 8KB Flash (+14%) | |||
| Data RAM | 192 x 8 bytes | 192 x 8 bytes | 192 x 8 bytes | 512 bytes (+167%) | |||
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 8 MHz (+100%) | |||
| I/O Pins | 33 | 33 | 33 | 35 | |||
| ADC | 8-ch, 8-bit | 8-ch, 8-bit | 8-ch, 8-bit | No ADC | |||
| Temperature Grade | Industrial -40C to +85C | Commercial 0C to +70C | Extended -40C to +125C | Industrial -40C to +85C | Extended -40C to +125C | Industrial -40C to +85C |
Principais diferenciais
- Industrial temperature grade at -40C to +85C (vs PIC16C74BT-04/PQ)
- Integrated 8-channel 8-bit ADC (vs ATMEGA8515L-8AU)
- Deterministic 4-cycle interrupt response (vs ATMEGA8515L-8AU)
Notas de projeto
Power the PIC16C74BT-04I/PQ from a clean regulated 5V or 3.3V rail with a decoupling network of 100 nF ceramic plus 10 uF electrolytic placed within 10 mm of Vdd pins 11 and 32. According to the PIC16C7X datasheet, both Vdd pins must be tied to the same supply, and both Vss pins (12 and 31) must be grounded. Brown-out Detect and Power-On Reset require the supply rise time to remain within the datasheet's specified slope to avoid spurious resets on power-up.
Route the external oscillator traces (OSC1 pin 13, OSC2 pin 14) as short, symmetric loops and place the crystal or resonator within 5 mm of the MCU to minimize EMI pickup. According to the PIC16C7X datasheet, the load capacitors for the crystal must match the manufacturer's recommended values (typically 15-33 pF) and should be grounded to the same Vss plane as the MCU. Avoid routing digital switching signals adjacent to OSC1/OSC2 to prevent clock jitter.
Because the PIC16C74BT-04I/PQ is OTP (One-Time Programmable), firmware bugs cannot be patched in the field. Verify firmware on a flash-based equivalent (PIC16F74-04I/PQ in the same 44-MQFP footprint) before committing to OTP programming. According to Microchip migration notes, the PIC16F74 is pin-compatible and supports in-circuit serial programming (ICSP) via the RB6/RB7 pins, allowing prototype iteration before final OTP burn-in production.
The PIC16C74BT-04I/PQ's analog inputs (RA0-RA5, RE0-RE2 alternate AN5-AN7) are sensitive to digital switching noise on adjacent PORTD or PORTC pins. According to the PIC16C7X datasheet, AC coupling from digital traces can inject 1-2 LSB error into the 8-bit ADC; route analog inputs separated from digital outputs, place a small RC filter (1 kohm + 100 nF) at each analog input when the source impedance is high, and ground the ADC Vref to a quiet analog ground island.
Informações de conformidade
This part is OTP-only and listed as obsolete by Microchip. Compliance status not confirmed in the verified distributor data; consult Microchip product discontinuation notices for the latest environmental compliance documentation before substituting into new designs.
