PIC16C74BT-04E/L - 8-Bit 4MHz MCU, 7KB OTP, 44-PLCC | Microchip
MPN: PIC16C74BT-04E/L ✗ Cuối đờiPIC16C74BT-04E/L Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, designed for embedded control tasks that require deterministic real-time response, low power, and small footprint. Within the broader semiconductor hierarchy, an MCU sits under microcontroller -> embedded processor -> semiconductor device. The PIC16CXX mid-range family is one of Microchip's classic RISC architectures with a 14-bit instruction word, contrasting with the 16-bit PIC24 and 32-bit PIC32 families.
Key features of the PIC16C74BT-04E/L include an integrated 8-channel 8-bit Analog-to-Digital Converter (ADC), three serial communication peripherals (I2C/SPI, SPI, and UART/USART - the legacy 'SSP' and 'USART' modules of the era), and support for an external oscillator. The automotive-grade 'E' suffix denotes an extended operating temperature grade, while the 'T' denotes tape-and-reel packaging and the '04' designator pins the 4 MHz maximum clock frequency.
Technically, the device uses a Harvard architecture with separate program and data buses, allowing simultaneous instruction fetch and operand access. The 33 I/O pins are multiplexed with analog and peripheral functions, and the chip provides programmable weak pull-ups, interrupt-on-change wake-up, and a watchdog timer for safety-critical designs.
Typical applications include industrial process control modules, automotive body electronics, sensor signal conditioning, motor control drive boards, and legacy embedded controller upgrades where the OTP memory suits low-volume or ruggedized production runs. The 44-PLCC socketed form factor simplifies field service and rapid prototyping.
When designing with this part, note that OTP memory cannot be electrically erased; engineers typically prototype with a windowed UV-erasable CERDIP variant and migrate to OTP only for production. Provide a clean +5V rail and decoupling per the datasheet's recommended layout.
This page synthesizes distributor pricing, drop-in package-matched alternatives, and practical design notes not collected in any single manufacturer or distributor document.
Bộ thay thế dễ dàng lắp đặt cho PIC16C74BT-04E/L — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16C74BT-04E/L (cùng hình factor và footprint) — khác nhau ở ADC, Package, Timers, Mounting Type, Core Architecture.
PIC16C74B-04E/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C74BT-04I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C74BT-04/PQ
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C74B-04E/PQ
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C74BT-04E/L Tỷ lệ tối đa & tính chất điện
| Core | 8-bit RISC (PIC16 mid-range) |
| Program Memory Size | 7 KB (4K x 14) OTP |
| RAM Size | 192 bytes |
| Tần số xung maksimum | 4 MHz |
| Number of I/O Pins | 33 |
| ADC | 8-channel x 8-bit |
| Operating Temperature Grade | Automotive (extended E grade) |
| Communication Interfaces | I2C/SPI (SSP), SPI, UART/USART |
| Oscillator Type | External |
| Hộp / Vỏ | 44-PLCC (16.59 x 16.59 mm, J-lead) |
| Terminal Form | J-BEND |
| Package Code | QCCJ (PLCC-44) |
| Packaging | Tape & Reel (TR) |
| Watchdog Timer | Yes |
| Instruction Word Width | 14-bit |
| Architecture | Harvard (separate program/data bus) |
Cấu hình chân PIC16C74BT-04E/L
| Chân 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Chân 4 | RA2/AN2 — PORTA bit 2 / Analog input channel 2 |
| Chân 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Chân 8 | OSC1/CLKIN — External oscillator input |
| Chân 9 | OSC2/CLKOUT — External oscillator output |
| Chân 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock input |
| Chân 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Chân 12 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Chân 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 16 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Chân 17 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Chân 18 | VSS — Ground reference |
| Chân 19 | VDD — Positive supply voltage |
| Chân 20 | RB0/INT — PORTB bit 0 / External interrupt |
| Chân 21 | RB1 — PORTB bit 1 |
| Chân 22 | RB2 — PORTB bit 2 |
| Chân 23 | RB3 — PORTB bit 3 |
| Chân 24 | RB4 — PORTB bit 4 |
| Chân 25 | RB5 — PORTB bit 5 |
| Chân 26 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 27 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 28 | NC — Not connected (per datasheet) |
| Chân 29 | NC — Not connected (per datasheet) |
| Chân 30 | NC — Not connected (per datasheet) |
| Chân 31 | NC — Not connected (per datasheet) |
| Chân 32 | NC — Not connected (per datasheet) |
| Chân 33 | RD0 — PORTD bit 0 |
| Chân 34 | RD1 — PORTD bit 1 |
| Chân 35 | RD2 — PORTD bit 2 |
| Chân 36 | RD3 — PORTD bit 3 |
| Chân 37 | RD4 — PORTD bit 4 |
| Chân 38 | RD5 — PORTD bit 5 |
| Chân 39 | RD6 — PORTD bit 6 |
| Chân 40 | RD7 — PORTD bit 7 |
| Chân 41 | RE0/RD — PORTE bit 0 / Parallel slave port read |
| Chân 42 | RE1/WR — PORTE bit 1 / Parallel slave port write |
| Chân 43 | RE2/CS — PORTE bit 2 / Parallel slave port chip select |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16C74BT-04E/L phù hợp cho 6 Áp dụngs: Industrial Process Control, Automotive Body Electronics, Sensor Signal Conditioning, Motor Control Drive Boards, Legacy Embedded Controller Upgrades, Educational and Hobbyist Microcontroller Kits.
Industrial Process Control
The PIC16C74BT-04E/L fits industrial process-control modules because of its 33 digital I/O pins and integrated 8-channel 8-bit ADC, which is sufficient for monitoring temperature, pressure, and flow-loop transducers. Its 4 MHz RISC core (1 us instruction cycle) handles PID calculations and HMI key-scan routines deterministically. The 44-PLCC socketed form factor allows field-replacement without desoldering in plant-floor installations.
Được đề xuất
Automotive Body Electronics
The 'E' automotive extended temperature grade makes the PIC16C74BT-04E/L suitable for under-dash body modules, lighting controllers, and HVAC blend-door actuators. Its 8-bit ADC reads thermistor and rheostat inputs while the USART drives body-network communication. Although NRND, the part remains supported by Microchip for ongoing automotive programs with established PPAP documentation.
Được đề xuất
Sensor Signal Conditioning
The on-chip 8-bit ADC and SSP/I2C peripheral allow the PIC16C74BT-04E/L to serve as a low-cost sensor-conditioning front-end that pre-processes analog inputs and forwards calibrated values over SPI to a host processor. The 192-byte RAM holds 64 8-bit samples for moving-average filtering, and the watchdog timer resets the MCU on firmware lock-up, improving field reliability.
Được đề xuất
Motor Control Drive Boards
Stepper and brushed-DC motor control boards benefit from the PIC16C74BT-04E/L's 33 I/O pins for driving H-bridges, optical-encoder inputs, and PWM channels derived from the on-chip timers. The 4 MHz instruction rate is adequate for low-RPM trapezoidal commutation. The 44-PLCC package sits on top of the heatsink area with adequate clearance for power-stage isolation.
Được đề xuất
Legacy Embedded Controller Upgrades
The PIC16C74BT-04E/L is a direct form-fit-function upgrade path for legacy products that originally shipped with the PIC16C74, PIC16C73B, or PIC16C74A on the same 44-PLCC footprint. The OTP memory simplifies firmware security in security-sensitive applications, and the instruction-set-compatible RISC core allows existing assembly code to recompile unchanged for the 74B silicon revision.
Được đề xuất
Educational and Hobbyist Microcontroller Kits
The PIC16C74BT-04E/L remains a teaching tool in university embedded-curriculum labs because of its well-documented mid-range instruction set and 44-PLCC socket that allows students to repeatedly insert and remove the device during firmware development. The 7 KB OTP memory exercises practical consideration of code-space budgeting, mirroring the discipline required by production OTP parts.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C74BT-04E/L — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16C74B-04E/L | PIC16C74BT-04I/L | PIC16C74BT-04/PQ |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (16.59 x 16.59 mm) | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Program Memory | 7 KB (4K x 14) OTP | 7 KB (4K x 14) OTP | 7 KB (4K x 14) OTP | 7 KB (4K x 14) OTP |
| RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| I/O Pins | 33 | 33 | 33 | 33 |
| ADC | 8-ch x 8-bit | 8-ch x 8-bit | 8-ch x 8-bit | 8-ch x 8-bit |
| Temperature Grade | Automotive E | Automotive E | Industrial I | Commercial |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tape & Reel |
Bảo phân biệt quan trọng
- Automotive 'E' temperature grade with 44-PLCC socket-friendly footprint (vsPIC16C74BT-04I/L)
- Tape-and-reel packaging for automated SMT assembly (vsPIC16C74B-04E/L)
- Legacy Microchip PIC16 mid-range architecture with 7 KB OTP (vsPIC16F74)
Ghi chú thiết kế
The PIC16C74BT-04E/L requires a clean +5V supply rail with a 0.1 uF ceramic decoupling capacitor placed within 5 mm of the VDD pin (pin 19) and a bulk capacitor of at least 10 uF on the board. The PIC16C mid-range family's ADC reference is software-selectable between VDD and VREF+; if high absolute accuracy is required, drive VREF+ (pin 5, shared with RA3/AN3) from a low-noise external reference such as an MCP1525 rather than VDD to avoid ADC gain error on noisy rails.
OTP memory cannot be electrically erased. For development, use a UV-erasable CERDIP or windowed PLCC variant (if available in your product family) or substitute a flash-based PIC16F74 on the same 44-PLCC footprint for prototyping. When migrating from prototype to production, remember that the OTP blank parts must be programmed in a gang programmer before SMT placement - any unprogrammed parts are scrap.
Place the 4 MHz crystal or external oscillator within 10 mm of the OSC1/OSC2 pins (pins 8 and 9) and route the traces symmetrically with a ground guard ring on both sides. Keep the OSC1/OSC2 traces away from the ADC analog inputs (RA0-RA5) and from the USART pins (RC6/RC7) to minimize digital-to-analog crosstalk. Maintain a continuous ground plane under the MCU and place bulk decoupling close to the VDD/VSS pair.
Thông tin tuân thủ
Verified web data did not include RoHS/REACH declarations. The 'E' suffix indicates an automotive operating temperature grade, but does not by itself imply AEC-Q100 qualification - the part was released prior to widespread AEC-Q100 adoption in the PIC16C OTP family.
