PIC16C74BT-04E/PQ - 8-Bit 4MHz OTP MCU 7KB Flash 44-MQFP
料号： PIC16C74BT-04E/PQ ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.85 | $985.00 |
| 500 | $8.75 | $4,375.00 |
| 1,000 | $7.9 | $7,900.00 |
PIC16C74BT-04E/PQ 概述
An 8-bit microcontroller (MCU) is a single-chip computer that integrates an 8-bit CPU core, program memory, working RAM, and peripherals such as timers, communication interfaces, and analog-to-digital converters into one IC. Within the broader semiconductor hierarchy, MCUs belong to the microcontroller -> embedded controller -> semiconductor device taxonomy. The PIC16CXX mid-range family sits between Microchip's baseline PIC10/PIC12/PIC16C5X and enhanced PIC17/PIC18 families, targeting applications that need more peripherals and code space than baseline parts while staying in a compact footprint.
Key features of the PIC16C74BT-04E/PQ include Brown-out Reset (BOR) and Power-on Reset (POR) for robust supply start-up, an internal/external oscillator selection, an ICD-friendly in-circuit debug capability, and a wide 5V operating supply. The OTP memory allows one-time programming of the application code - lower unit cost than UV-EPROM or windowed parts, but the device cannot be erased and reprogrammed.
Architecturally, the PIC16C74B uses a 14-bit instruction word, separate program and data buses (Harvard architecture), and a fully-static design so the clock can be stopped for power saving. The 4MHz input oscillator combined with a 4-cycle-per-instruction pipeline yields 1 MIPS of processing throughput, which is sufficient for control loops, simple user interfaces, and slow serial communication.
Typical applications for the PIC16C74BT-04E/PQ include industrial motor control, sensor signal conditioning, low-speed data acquisition, appliance control boards, and embedded user-interface controllers. Its small footprint and integrated ADC reduce bill-of-materials cost in space-constrained designs.
When designing with this part, confirm that 5V supply tolerance matches downstream peripherals and that the chosen oscillator components meet the 4MHz spec across the full operating temperature range. Designers should plan firmware carefully because OTP parts cannot be re-flashed during field service.
This page synthesizes distributor pricing, drop-in Microchip same-family alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： PIC16C74BT-04E/PQ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16C74BT-04E/PQ （相同外形与封装尺寸） ——差异在于 Core Architecture, ADC, Timers, Package, Program Memory Size.
快速对比工具——选择替代料号进行并排对比：
PIC16C74B-04E/PQ
✅ 直接替换✓ 有现货
$9.95 / 个
查看数据手册 →PIC16C74BT-04/PQ
✅ 直接替换✓ 有现货
$5.6 / 个
查看数据手册 →PIC16C74B-04/PQ
✅ 直接替换✓ 有现货
$7.25 / 个
查看数据手册 →PIC16C74B-04I/P
✅ 直接替换✓ 有现货
$5.55 / 个
查看数据手册 →PIC16C74A-04E/PQ
✅ 直接替换✓ 有现货
$6.2 / 个
查看数据手册 →PIC16C74A-04/PQ
✅ 直接替换✓ 有现货
$5.8 / 个
查看数据手册 →PIC16C74AT-20I/PQ
✅ 直接替换✓ 有现货
$7.1 / 个
查看数据手册 →PIC16C74AT-10I/PQ
✅ 直接替换✓ 有现货
$5.8 / 个
查看数据手册 →PIC16C74BT-04E/PQ 最大额定值与电气特性
| Core | PIC 8-bit |
| Program Memory Size | 7 KB (4K x 14) OTP |
| RAM Size | 192 x 8 bytes |
| 最大时钟频率 | 4 MHz |
| Number of I/O Pins | 33 |
| 封装 / 外壳 | 44-MQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| ADC | 8-channel, 8-bit |
| Communication Interfaces | I2C, SPI, UART/USART |
| Oscillator Type | External |
| 电源电压 | 5 V |
| 工作温度 | -40C to +125C (E suffix = extended) |
| Instruction Set Architecture | Harvard, 14-bit instruction word |
| Program Memory Type | OTP (One-Time Programmable) |
| Packaging | Tape & Reel (TR) |
| RoHS 状态 | unknown |
| Architecture Family | PIC16CXX mid-range |
PIC16C74BT-04E/PQ 引脚配置
| 引脚 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| 引脚 2 | OSC1/CLKIN — External clock input / Crystal oscillator pin 1 |
| 引脚 3 | OSC2/CLKOUT — Oscillator output / Clock out (4x fosc) |
| 引脚 4 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| 引脚 5 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| 引脚 6 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| 引脚 7 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / ADC reference |
| 引脚 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 引脚 9 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| 引脚 10 | VSS — Ground reference |
| 引脚 11 | VDD — Positive supply (5V) |
| 引脚 12 | RB0/INT — PORTB bit 0 / External interrupt |
| 引脚 13 | RB1 — PORTB bit 1 |
| 引脚 14 | RB2 — PORTB bit 2 |
| 引脚 15 | RB3/PGM — PORTB bit 3 / Low-voltage programming |
| 引脚 16 | RB4 — PORTB bit 4 |
| 引脚 17 | RB5 — PORTB bit 5 |
| 引脚 18 | RB6/PGC — PORTB bit 6 / ICD clock |
| 引脚 19 | RB7/PGD — PORTB bit 7 / ICD data |
| 引脚 20 | VSS — Ground reference |
| 引脚 21 | VDD — Positive supply (5V) |
| 引脚 22 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / clock in |
| 引脚 23 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| 引脚 24 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM1 |
| 引脚 25 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 26 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 28 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| 引脚 29 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| 引脚 30 | VSS — Ground reference |
| 引脚 31 | VDD — Positive supply (5V) |
| 引脚 32 | RD0 — PORTD bit 0 |
| 引脚 33 | RD1 — PORTD bit 1 |
| 引脚 34 | RD2 — PORTD bit 2 |
| 引脚 35 | RD3 — PORTD bit 3 |
| 引脚 36 | RD4 — PORTD bit 4 |
| 引脚 37 | RD5 — PORTD bit 5 |
| 引脚 38 | RD6 — PORTD bit 6 |
| 引脚 39 | RD7 — PORTD bit 7 |
| 引脚 40 | VSS — Ground reference |
| 引脚 41 | VDD — Positive supply (5V) |
| 引脚 42 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input 5 |
| 引脚 43 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog input 6 |
| 引脚 44 | RE2/CS/AN7 — PORTE bit 2 / Chip select / Analog input 7 |
典型应用
PIC16C74BT-04E/PQ 适用于 6 应用s: Industrial Motor Control Board, Sensor Signal Conditioning Hub, Appliance Control Board (White Goods), Low-Speed Data Acquisition Module, Embedded User-Interface Controller, Automotive Body Electronics (Legacy).
Industrial Motor Control Board
The PIC16C74BT-04E/PQ fits industrial motor-control daughter boards where its 8-channel 8-bit ADC digitizes current-sensor and back-EMF feedback, while the on-chip UART/SPI links to a host PLC or display. The 33 I/O lines handle direction-control GPIO, brake outputs, and fault flags. Compared with a discrete logic solution, the integrated MCU reduces BOM by 30% and consolidates the commutation loop into firmware.
推荐
Sensor Signal Conditioning Hub
Sensor hubs aggregating thermocouple, RTD, or bridge-pressure signals benefit from the PIC16C74BT-04E/PQ's 8-channel ADC and 33 GPIO. The Harvard architecture and 4MHz clock support 1 MIPS throughput, sufficient for oversampling averaging and linearization routines. The extended -40C to +125C range handles plant-floor environments without derating.
推荐
Appliance Control Board (White Goods)
Washing-machine, dishwasher, and oven controllers traditionally use PIC16C mid-range MCUs for relay drivers, keypad scan, and LCD interface. The PIC16C74BT-04E/PQ offers 33 I/O for 7-segment displays plus 8-channel ADC for temperature and water-level sensing. OTP programming lowers unit cost versus flash parts in high-volume appliance production.
推荐
Low-Speed Data Acquisition Module
Multi-channel analog front ends digitizing 0-5V transducer signals use the PIC16C74BT-04E/PQ's 8-channel 8-bit ADC to capture sensor data and forward it over UART or SPI to a host logger. The Harvard architecture provides deterministic interrupt latency for sampled-data pipelines. The 5V supply rail aligns with industrial 24V->5V buck converters.
推荐
Embedded User-Interface Controller
Front-panel keypads, LED/LCD indicators, and rotary-encoder inputs map cleanly to the PIC16C74BT-04E/PQ's 33 GPIO. The integrated I2C/SPI peripherals drive character LCDs or capacitive-touch front-ends. With the 'E' temperature rating, the same part serves both indoor and outdoor kiosks.
推荐
Automotive Body Electronics (Legacy)
Pre-CAN-era body controllers (lamp drivers, mirror controls, simple wiper logic) used PIC16C74B-family MCUs. The PIC16C74BT-04E/PQ's -40C to +125C rating covers under-hood and cabin environments. Although newer designs use PIC18 or dsPIC, the legacy design base keeps demand for this part in aftermarket rebuilds.
推荐
推荐产品汇总
工程参考数据： PIC16C74BT-04E/PQ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16C74B-04E/PQ | PIC16C74BT-04/PQ | PIC16C74B-04/PQ | PIC16C74A-04E/PQ | PIC16C74AT-20I/PQ |
|---|---|---|---|---|---|---|
| Package | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | 8-bit PIC | 8-bit PIC | 8-bit PIC | 8-bit PIC | 8-bit PIC | 8-bit PIC |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| RAM Size | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | -40C to +125C (E) | -40C to +125C (E) | 0C to +70C | 0C to +70C | -40C to +125C (E) | -40C to +85C (I) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
关键差异点
- Same die across 04/04E temperature grades （对比 PIC16C74BT-04/PQ)
- Tape-and-reel packaging for SMT （对比 PIC16C74B-04E/PQ)
- Extended-temperature option vs A revision （对比 PIC16C74A-04E/PQ)
设计说明
The PIC16C74BT-04E/PQ operates from a single 5V supply. Decouple VDD with a 100nF ceramic capacitor placed within 5mm of each VDD pin (the device has multiple VDD/VSS pairs: pins 11, 21, 31, 41 and 10, 20, 30, 40 respectively). A bulk 10uF tantalum or aluminum polymer cap on the main 5V rail handles transient current from I/O switching. Brown-out Reset (BOR) is enabled by configuration fuse to protect against supply droops.
Place the 4MHz crystal or resonator within 10mm of OSC1 (pin 2) and OSC2 (pin 3). Use short, symmetrical traces and a ground plane reference underneath to minimize EMI. The 44-MQFP package has a center thermal pad that MUST be soldered to a grounded copper pour for mechanical stability; ensure the pad pattern matches the land geometry in the Microchip package drawing.
OTP parts cannot be erased or re-flashed. Plan firmware development on a windowed or flash-equivalent PIC16F877A-I/PQ first, then port the verified firmware to the PIC16C74BT-04E/PQ for production. Do not exceed 5V on any pin - the MCLR/VPP pin (pin 1) tolerates up to 13.5V only in programming mode, not in run mode. Always tie MCLR through a 10k pull-up to VDD.
合规信息
Compliance data not provided in verified web sources; marked unknown per data authenticity rules. The 'E' temperature suffix is Microchip's extended industrial grade, not automotive AEC-Q100.
