PIC16C74BT-04I/PQ - 8-bit MCU, 7KB OTP, 4MHz, 44-MQFP | Microchip
Référence : PIC16C74BT-04I/PQ ✗ Fin de vie| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour PIC16C74BT-04I/PQ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC16C74BT-04I/PQ (même facteur de forme et même empreinte) — différant par Package, Core Architecture, Serial Interfaces, Timers, Program Memory Size.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16C74BT-04/PQ
✅ Remplacement direct✓ En stock
$5.6 / unité
Voir la fiche technique →PIC16C74BT-04E/PQ
✅ Remplacement direct✓ En stock
$7.9 / unité
Voir la fiche technique →PIC16C74B-04/PQ
✅ Remplacement direct✓ En stock
$7.25 / unité
Voir la fiche technique →PIC16C74B-04I/PQ
✅ Remplacement direct✓ En stock
$1.78 / unité
Voir la fiche technique →PIC16C74B-04E/PQ
✅ Remplacement direct✓ En stock
$9.95 / unité
Voir la fiche technique →ATMEGA8515L-8AUR
✅ Remplacement direct✓ En stock
$1.98 / unité
Voir la fiche technique →PIC16C74BT-04I/PQ Valeurs maximales et caractéristiques électriques
| 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 |
| Fréquence d'horloge maximale | 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 |
| Boîtier | 44-MQFP (10x10 mm), 'PQ' designator |
| Type de montage | 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 |
Configuration des broches de PIC16C74BT-04I/PQ
| Broche 1 | MCLR/Vpp — Master Clear (reset) input / programming voltage |
| Broche 2 | RA0/AN0 — PORTA bit 0 / ADC analog input 0 |
| Broche 3 | RA1/AN1 — PORTA bit 1 / ADC analog input 1 |
| Broche 4 | RA2/AN2 — PORTA bit 2 / ADC analog input 2 |
| Broche 5 | RA3/AN3/VREF — PORTA bit 3 / ADC input 3 / voltage reference |
| Broche 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Broche 7 | RA5/AN4/SS — PORTA bit 5 / ADC input 4 / SPI slave select |
| Broche 8 | RE0/RD — PORTE bit 0 / parallel port read control |
| Broche 9 | RE1/WR — PORTE bit 1 / parallel port write control |
| Broche 10 | RE2/CS — PORTE bit 2 / parallel port chip select |
| Broche 11 | VDD — Positive supply voltage |
| Broche 12 | VSS — Ground reference |
| Broche 13 | OSC1/CLKIN — External oscillator input / clock in |
| Broche 14 | OSC2/CLKOUT — External oscillator output / clock out |
| Broche 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / clock in |
| Broche 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| Broche 17 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM1 |
| Broche 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Broche 19 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Broche 20 | RC5/SDO — PORTC bit 5 / SPI data out |
| Broche 21 | RC6/TX/CK — PORTC bit 6 / UART transmit / clock |
| Broche 22 | RC7/RX/DT — PORTC bit 7 / UART receive / data |
| Broche 23 | RD0 — PORTD bit 0 |
| Broche 24 | RD1 — PORTD bit 1 |
| Broche 25 | RD2 — PORTD bit 2 |
| Broche 26 | RD3 — PORTD bit 3 |
| Broche 27 | RD4 — PORTD bit 4 |
| Broche 28 | RD5 — PORTD bit 5 |
| Broche 29 | RD6 — PORTD bit 6 |
| Broche 30 | RD7 — PORTD bit 7 |
| Broche 31 | VSS — Ground reference |
| Broche 32 | VDD — Positive supply voltage |
| Broche 33 | RB0/INT — PORTB bit 0 / external interrupt |
| Broche 34 | RB1 — PORTB bit 1 |
| Broche 35 | RB2 — PORTB bit 2 |
| Broche 36 | RB3 — PORTB bit 3 |
| Broche 37 | RB4 — PORTB bit 4 |
| Broche 38 | RB5 — PORTB bit 5 |
| Broche 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Broche 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Broche 41 | AN5 — ADC analog input 5 |
| Broche 42 | AN6 — ADC analog input 6 |
| Broche 43 | AN7 — ADC analog input 7 |
| Broche 44 | NC — Not connected (per datasheet) |
Applications typiques
PIC16C74BT-04I/PQ convient pour 7 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16C74BT-04I/PQ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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)
Notes de conception
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.
Informations de conformité
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.
