PIC16C74BT-04I/PQ - 8-bit MCU, 7KB OTP, 4MHz, 44-MQFP | Microchip
部品番号: PIC16C74BT-04I/PQ ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 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 概要
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.
ドロップイン代替品: PIC16C74BT-04I/PQ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PIC16C74BT-04I/PQ （同一形状・フットプリント） — 相違点: Package, Core Architecture, Serial Interfaces, Timers, Program Memory Size.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16C74BT-04/PQ
✅ ドロップイン✓ 在庫あり
$5.6 / 個
データシートを見る →PIC16C74BT-04E/PQ
✅ ドロップイン✓ 在庫あり
$7.9 / 個
データシートを見る →PIC16C74B-04/PQ
✅ ドロップイン✓ 在庫あり
$7.25 / 個
データシートを見る →PIC16C74B-04I/PQ
✅ ドロップイン✓ 在庫あり
$1.78 / 個
データシートを見る →PIC16C74B-04E/PQ
✅ ドロップイン✓ 在庫あり
$9.95 / 個
データシートを見る →ATMEGA8515L-8AUR
✅ ドロップイン✓ 在庫あり
$1.98 / 個
データシートを見る →PIC16C74BT-04I/PQ 最大定格＆電気的特性
| 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 |
| 最大クロック周波数 | 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 |
| パッケージ | 44-MQFP (10x10 mm), 'PQ' designator |
| 実装タイプ | 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 |
PIC16C74BT-04I/PQ ピン構成
| ピン 1 | MCLR/Vpp — Master Clear (reset) input / programming voltage |
| ピン 2 | RA0/AN0 — PORTA bit 0 / ADC analog input 0 |
| ピン 3 | RA1/AN1 — PORTA bit 1 / ADC analog input 1 |
| ピン 4 | RA2/AN2 — PORTA bit 2 / ADC analog input 2 |
| ピン 5 | RA3/AN3/VREF — PORTA bit 3 / ADC input 3 / voltage reference |
| ピン 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| ピン 7 | RA5/AN4/SS — PORTA bit 5 / ADC input 4 / SPI slave select |
| ピン 8 | RE0/RD — PORTE bit 0 / parallel port read control |
| ピン 9 | RE1/WR — PORTE bit 1 / parallel port write control |
| ピン 10 | RE2/CS — PORTE bit 2 / parallel port chip select |
| ピン 11 | VDD — Positive supply voltage |
| ピン 12 | VSS — Ground reference |
| ピン 13 | OSC1/CLKIN — External oscillator input / clock in |
| ピン 14 | OSC2/CLKOUT — External oscillator output / clock out |
| ピン 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / clock in |
| ピン 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| ピン 17 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM1 |
| ピン 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| ピン 19 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| ピン 20 | RC5/SDO — PORTC bit 5 / SPI data out |
| ピン 21 | RC6/TX/CK — PORTC bit 6 / UART transmit / clock |
| ピン 22 | RC7/RX/DT — PORTC bit 7 / UART receive / data |
| ピン 23 | RD0 — PORTD bit 0 |
| ピン 24 | RD1 — PORTD bit 1 |
| ピン 25 | RD2 — PORTD bit 2 |
| ピン 26 | RD3 — PORTD bit 3 |
| ピン 27 | RD4 — PORTD bit 4 |
| ピン 28 | RD5 — PORTD bit 5 |
| ピン 29 | RD6 — PORTD bit 6 |
| ピン 30 | RD7 — PORTD bit 7 |
| ピン 31 | VSS — Ground reference |
| ピン 32 | VDD — Positive supply voltage |
| ピン 33 | RB0/INT — PORTB bit 0 / external interrupt |
| ピン 34 | RB1 — PORTB bit 1 |
| ピン 35 | RB2 — PORTB bit 2 |
| ピン 36 | RB3 — PORTB bit 3 |
| ピン 37 | RB4 — PORTB bit 4 |
| ピン 38 | RB5 — PORTB bit 5 |
| ピン 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| ピン 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| ピン 41 | AN5 — ADC analog input 5 |
| ピン 42 | AN6 — ADC analog input 6 |
| ピン 43 | AN7 — ADC analog input 7 |
| ピン 44 | NC — Not connected (per datasheet) |
主な用途
PIC16C74BT-04I/PQ の用途: 7 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PIC16C74BT-04I/PQ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- 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)
設計ノート
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.
コンプライアンス情報
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.
