PIC16C74BT-04E/PT - 8-bit PIC MCU, 7KB OTP, 4MHz, 44-TQFP | Microchip
MPN: PIC16C74BT-04E/PT ✓ Hoạt độngPIC16C74BT-04E/PT Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals on one die, and the PIC16CXX mid-range family uses a RISC (Reduced Instruction Set Computer) architecture with 35 single-cycle instructions to deliver predictable deterministic execution. The PIC16C74B specifically sits in the mid-range tier between baseline PIC16C5x and enhanced PIC16C6x/7x parts, balancing peripheral integration with code density for embedded control designs.
Key features include 33 digital I/O lines multiplexed with on-chip peripherals, three timer modules, a USART for asynchronous/synchronous serial communication, an MSSP module for SPI and I2C, an 8-channel 8-bit Analog-to-Digital Converter (ADC), and capture/compare/PWM (CCP) capability. The OTP program memory uses EPROM cells, which the "T" suffix indicates an industrial/automotive temperature window. Power consumption is reduced through the SLEEP mode with wake-up on interrupt or watchdog timeout, and the architecture supports in-circuit serial programming via two pins.
The PIC16C74B uses a Harvard architecture with separate program and data buses, allowing instruction fetch and operand access in a single cycle. The RISC CPU contains an 8-bit ALU, 8-bit working register (W), and a hardware multiply assist. Brown-out Reset (BOR), Power-on Reset (POR), and Watchdog Timer (WDT) with its own on-chip RC oscillator protect against code runaway and unstable supply ramps.
Typical applications include industrial control nodes, automotive body and chassis ECUs, sensor signal conditioning, low-speed motor drivers, HVAC damper controllers, and consumer appliance user interfaces. The 8-bit ADC is well matched to thermistor, potentiometer, and battery monitoring tasks. The PIC16C74BT-04E/PT specifically suits automotive under-hood modules where the extended temperature grade and proven OTP one-time-programmable memory are required. When selecting this part, verify that OTP is acceptable for your production volume - high-volume programs typically migrate to the Flash-based PIC16F74 or PIC16F877A for reprogrammability during board bring-up.
Bộ thay thế dễ dàng lắp đặt cho PIC16C74BT-04E/PT — 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/PT (cùng hình factor và footprint) — khác nhau ở Core Architecture, Timers, Operating Temperature, Program Memory Size, Program Memory Type.
PIC16C74BT-04E/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C74BT-04/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C74B-04E/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C74B-04E/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C74B-04I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65B-04I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C74BT-04E/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC RISC (mid-range PIC16CXX family) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 192 x 8 bytes |
| Number of I/O Pins | 33 |
| Tần số xung maksimum | 4 MHz |
| Supply Voltage (Vcc/Vdd) | 4.0 V to 5.5 V |
| Oscillator Type | External |
| Hộp / Vỏ | 44-TQFP (10x10 mm) |
| Packaging | Tape & Reel (TR) |
| Temperature Grade | Automotive (Extended -40C to +125C) |
| Terminal Form | Gull Wing |
| Number of Terminals | 44 |
| Package Code | TQFP |
| Package Shape | Square |
| Series | PIC 16C |
Cấu hình chân PIC16C74BT-04E/PT
| Chân 1 | MCLR/Vpp — Master Clear (reset) input / Programming voltage |
| Chân 2 | RA0/AN0 — Port A bit 0 / Analog input channel 0 |
| Chân 3 | RA1/AN1 — Port A bit 1 / Analog input channel 1 |
| Chân 4 | RA2/AN2 — Port A bit 2 / Analog input channel 2 |
| Chân 5 | RA3/AN3/Vref+ — Port A bit 3 / Analog input channel 3 / ADC Vref+ |
| Chân 6 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| Chân 7 | RA5/AN4/SS — Port A bit 5 / Analog input channel 4 / SPI slave select |
| Chân 8 | RE0/RD/AN5 — Port E bit 0 / Parallel slave port read / Analog input channel 5 |
| Chân 9 | RE1/WR/AN6 — Port E bit 1 / Parallel slave port write / Analog input channel 6 |
| Chân 10 | RE2/CS/AN7 — Port E bit 2 / Parallel slave port chip select / Analog input channel 7 |
| Chân 11 | Vdd — Positive supply voltage (4.0 V to 5.5 V) |
| Chân 12 | Vss — Ground reference |
| Chân 13 | OSC1/CLKIN — Crystal oscillator input / External clock input |
| Chân 14 | OSC2/CLKOUT — Crystal oscillator output / Clock output (Fosc/4) |
| Chân 15 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer 1 oscillator output / Timer 1 clock input |
| Chân 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer 1 oscillator input / Capture-Compare-PWM 2 |
| Chân 17 | RC2/CCP1 — Port C bit 2 / Capture-Compare-PWM 1 |
| Chân 18 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Chân 19 | RD0/PSP0 — Port D bit 0 / Parallel slave port data bit 0 |
| Chân 20 | RD1/PSP1 — Port D bit 1 / Parallel slave port data bit 1 |
| Chân 21 | RD2/PSP2 — Port D bit 2 / Parallel slave port data bit 2 |
| Chân 22 | RD3/PSP3 — Port D bit 3 / Parallel slave port data bit 3 |
| Chân 23 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Chân 24 | RC5/SDO — Port C bit 5 / SPI data out |
| Chân 25 | RC6/TX/CK — Port C bit 6 / USART async transmit / USART sync clock |
| Chân 26 | RC7/RX/DT — Port C bit 7 / USART async receive / USART sync data |
| Chân 27 | RD4/PSP4 — Port D bit 4 / Parallel slave port data bit 4 |
| Chân 28 | RD5/PSP5 — Port D bit 5 / Parallel slave port data bit 5 |
| Chân 29 | RD6/PSP6 — Port D bit 6 / Parallel slave port data bit 6 |
| Chân 30 | RD7/PSP7 — Port D bit 7 / Parallel slave port data bit 7 |
| Chân 31 | Vss — Ground reference |
| Chân 32 | Vdd — Positive supply voltage (4.0 V to 5.5 V) |
| Chân 33 | RB0/INT — Port B bit 0 / External interrupt input |
| Chân 34 | RB1 — Port B bit 1 |
| Chân 35 | RB2 — Port B bit 2 |
| Chân 36 | RB3/PGM — Port B bit 3 / Low-voltage programming input |
| Chân 37 | RB4 — Port B bit 4 |
| Chân 38 | RB5 — Port B bit 5 |
| Chân 39 | RB6/PGC — Port B bit 6 / In-circuit serial programming clock |
| Chân 40 | RB7/PGD — Port B bit 7 / In-circuit serial programming data |
| Chân 41 | Vss — Ground reference |
| Chân 42 | Vdd — Positive supply voltage (4.0 V to 5.5 V) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16C74BT-04E/PT phù hợp cho 6 Áp dụngs: Automotive Body Control Modules, Industrial Sensor Signal Conditioning, HVAC Damper and Valve Controllers, Low-Speed DC Motor Drivers, Consumer Appliance User Interfaces, Battery-Powered Telemetry Nodes.
Automotive Body Control Modules
The PIC16C74BT-04E/PT's automotive E-grade (-40C to +125C) and 33 digital I/O make it a strong fit for body-control ECUs that switch lighting, wipers, and accessory relays. Its 4 MHz RISC core handles 1 MIPS, which is more than enough for body-domain state machines and PWM dimming. The on-chip 8-channel 8-bit ADC reads thermistor, potentiometer, and battery-sense inputs directly, eliminating external signal conditioning.
Được đề xuất
Industrial Sensor Signal Conditioning
The 8-channel 8-bit ADC and USART peripherals enable the PIC16C74BT-04E/PT to act as a multi-channel sensor front-end, digitizing thermocouple bridges, pressure transducers, and 4-20 mA loops into serial data for a host PLC. With 192 bytes of RAM and 7 KB of OTP, it can host calibration tables and linearization routines on-chip. The 4.0-5.5 V supply matches industrial 5 V rails directly.
Được đề xuất
HVAC Damper and Valve Controllers
For HVAC damper actuators and proportional valves, the PIC16C74BT-04E/PT combines the capture/compare/PWM module with the 33 I/O lines to drive multiple servo outputs and read position feedback. The PIC16 RISC core delivers deterministic interrupt latency, critical for closed-loop valve control where jitter would translate into actuator hunting. Brown-out Reset and Watchdog Timer protect against supply sag during compressor inrush.
Được đề xuất
Low-Speed DC Motor Drivers
The PIC16C74BT-04E/PT drives brushed DC motors up to a few hundred RPM through PWM control from its CCP module and discrete H-bridge FETs. The 33 I/O pins allow multi-axis control, with the USART relaying telemetry back to a higher-level controller. OTP memory locks the firmware against field tampering, which is useful in commercial appliance and vending machine applications.
Được đề xuất
Consumer Appliance User Interfaces
In washing machines, dishwashers, and microwave ovens, the PIC16C74BT-04E/PT scans keypad matrices, drives LED/LCD displays, and times appliance cycles with its three on-chip timers. The USART interfaces to inverter boards or wireless modules, while the ADC monitors motor current and temperature sensors. OTP memory at qty-1k pricing below USD 7 supports cost-sensitive consumer SKUs.
Được đề xuất
Battery-Powered Telemetry Nodes
Although the PIC16C74BT-04E/PT is not optimized for ultra-low-power designs, its SLEEP mode combined with Watchdog Timer wake-up allows duty-cycled telemetry in remote sensor installations. The ADC samples slow-changing analog inputs, and the USART transmits burst data before returning to sleep, dramatically extending battery life in remote solar-powered nodes.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C74BT-04E/PT — 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 | PIC16C74BT-04E/PQ | PIC16C74BT-04/PQ | PIC16C74B-04E/PQ | PIC16C65B-04I/PT |
|---|---|---|---|---|---|
| Package | 44-TQFP (PT) 10x10 mm | 44-MQFP (PQ) - equivalent SMT footprint | 44-MQFP (PQ) - equivalent SMT footprint | 44-MQFP (PQ) - equivalent SMT footprint | 44-TQFP (PT) - same package |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7 KB (4K x 14) OTP EPROM | 7 KB OTP EPROM - same | 7 KB OTP EPROM - same | 7 KB OTP EPROM - same | Smaller OTP - check code fit |
| RAM Size | 192 x 8 bytes | 192 x 8 bytes - same | 192 x 8 bytes - same | 192 x 8 bytes - same | 192 x 8 bytes - same |
| Maximum Clock | 4 MHz | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same |
| Temperature Grade | Automotive -40C to +125C (E-grade) | Automotive -40C to +125C - same | Commercial 0C to +70C | Automotive -40C to +125C - same | Industrial -40C to +85C |
| Number of I/O | 33 | 33 - same | 33 - same | 33 - same | 33 - same |
| Supply Voltage | 4.0 V to 5.5 V | 4.0 V to 5.5 V - same | 4.0 V to 5.5 V - same | 4.0 V to 5.5 V - same | 4.0 V to 5.5 V - same |
| Memory Type | OTP EPROM | OTP EPROM - same | OTP EPROM - same | OTP EPROM - same | OTP EPROM - same |
Bảo phân biệt quan trọng
- Automotive E-grade temperature window (vsPIC16C74BT-04/PQ)
- Same TQFP-44 surface-mount footprint for modern reflow assembly (vsPIC16C74B-04E/L)
- Larger code space than mid-tier siblings (vsPIC16C65B-04I/PT)
Ghi chú thiết kế
Power the PIC16C74BT-04E/PT from a regulated 5 V rail with bulk decoupling of at least 10 uF tantalum plus a 100 nF ceramic placed within 5 mm of each Vdd pin. The part has three Vdd pins (11, 32, 42) and three Vss pins (12, 31, 41); each pair must be decoupled to ensure clean ADC and oscillator operation. Brown-out Reset should be enabled in the configuration word to prevent code execution during Vdd ramp-up below 4.0 V.
OTP EPROM memory can be programmed only once - there is no in-circuit erase. Use a socketed prototype or a PIC16F74 / PIC16F877A Flash equivalent for development, then migrate the verified firmware to the PIC16C74B OTP part for production. A failed or corrupted OTP programming leaves the part unusable, so always verify the device ID and blank-check before issuing the row-program command.
Route the 4 MHz crystal traces (OSC1/OSC2) as short as possible and guard them with a ground pour to avoid coupling noise into the ADC reference. Place the analog Vref+ trace (RA3) away from digital switching lines like RC6/RC7 (USART) to prevent ADC noise injection. The TQFP-44 package has a 10x10 mm body with 0.8 mm pitch leads, requiring 0.4 mm wide traces and 0.2 mm solder mask sliver.
Thông tin tuân thủ
RoHS, REACH, lead-free, halogen-free, and conflict-mineral status were not stated in the Verified Web Data; users should request the latest material declaration from Microchip. The PIC16C OTP family is not formally AEC-Q100 qualified; designers requiring AEC-Q100 must select a Flash-based PIC16F/dsPIC equivalent.