PIC16C74BT-04E/PT - 8-bit PIC MCU, 7KB OTP, 4MHz, 44-TQFP | Microchip
MPN: PIC16C74BT-04E/PT ✓ نشطPIC16C74BT-04E/PT نظرة عامة
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.
بدائل مباشرة لـ PIC16C74BT-04E/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC16C74BT-04E/PT (نفس عامل الشكل والبصمة) — يختلف في Core Architecture, Timers, Operating Temperature, Program Memory Size, Program Memory Type.
PIC16C74BT-04E/PQ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C74BT-04/PQ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C74B-04E/PQ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C74B-04E/L
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C74B-04I/P
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C65B-04I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C74BT-04E/PT الحدود القصوى والخصائص الكهربائية
| 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 |
| أقصى تردد للساعة | 4 MHz |
| Supply Voltage (Vcc/Vdd) | 4.0 V to 5.5 V |
| Oscillator Type | External |
| العلبة / الحالة | 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 |
تكوين أطراف PIC16C74BT-04E/PT
| دبوس 1 | MCLR/Vpp — Master Clear (reset) input / Programming voltage |
| دبوس 2 | RA0/AN0 — Port A bit 0 / Analog input channel 0 |
| دبوس 3 | RA1/AN1 — Port A bit 1 / Analog input channel 1 |
| دبوس 4 | RA2/AN2 — Port A bit 2 / Analog input channel 2 |
| دبوس 5 | RA3/AN3/Vref+ — Port A bit 3 / Analog input channel 3 / ADC Vref+ |
| دبوس 6 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| دبوس 7 | RA5/AN4/SS — Port A bit 5 / Analog input channel 4 / SPI slave select |
| دبوس 8 | RE0/RD/AN5 — Port E bit 0 / Parallel slave port read / Analog input channel 5 |
| دبوس 9 | RE1/WR/AN6 — Port E bit 1 / Parallel slave port write / Analog input channel 6 |
| دبوس 10 | RE2/CS/AN7 — Port E bit 2 / Parallel slave port chip select / Analog input channel 7 |
| دبوس 11 | Vdd — Positive supply voltage (4.0 V to 5.5 V) |
| دبوس 12 | Vss — Ground reference |
| دبوس 13 | OSC1/CLKIN — Crystal oscillator input / External clock input |
| دبوس 14 | OSC2/CLKOUT — Crystal oscillator output / Clock output (Fosc/4) |
| دبوس 15 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer 1 oscillator output / Timer 1 clock input |
| دبوس 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer 1 oscillator input / Capture-Compare-PWM 2 |
| دبوس 17 | RC2/CCP1 — Port C bit 2 / Capture-Compare-PWM 1 |
| دبوس 18 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| دبوس 19 | RD0/PSP0 — Port D bit 0 / Parallel slave port data bit 0 |
| دبوس 20 | RD1/PSP1 — Port D bit 1 / Parallel slave port data bit 1 |
| دبوس 21 | RD2/PSP2 — Port D bit 2 / Parallel slave port data bit 2 |
| دبوس 22 | RD3/PSP3 — Port D bit 3 / Parallel slave port data bit 3 |
| دبوس 23 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| دبوس 24 | RC5/SDO — Port C bit 5 / SPI data out |
| دبوس 25 | RC6/TX/CK — Port C bit 6 / USART async transmit / USART sync clock |
| دبوس 26 | RC7/RX/DT — Port C bit 7 / USART async receive / USART sync data |
| دبوس 27 | RD4/PSP4 — Port D bit 4 / Parallel slave port data bit 4 |
| دبوس 28 | RD5/PSP5 — Port D bit 5 / Parallel slave port data bit 5 |
| دبوس 29 | RD6/PSP6 — Port D bit 6 / Parallel slave port data bit 6 |
| دبوس 30 | RD7/PSP7 — Port D bit 7 / Parallel slave port data bit 7 |
| دبوس 31 | Vss — Ground reference |
| دبوس 32 | Vdd — Positive supply voltage (4.0 V to 5.5 V) |
| دبوس 33 | RB0/INT — Port B bit 0 / External interrupt input |
| دبوس 34 | RB1 — Port B bit 1 |
| دبوس 35 | RB2 — Port B bit 2 |
| دبوس 36 | RB3/PGM — Port B bit 3 / Low-voltage programming input |
| دبوس 37 | RB4 — Port B bit 4 |
| دبوس 38 | RB5 — Port B bit 5 |
| دبوس 39 | RB6/PGC — Port B bit 6 / In-circuit serial programming clock |
| دبوس 40 | RB7/PGD — Port B bit 7 / In-circuit serial programming data |
| دبوس 41 | Vss — Ground reference |
| دبوس 42 | Vdd — Positive supply voltage (4.0 V to 5.5 V) |
| دبوس 43 | NC — Not connected (per datasheet) |
| دبوس 44 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
PIC16C74BT-04E/PT مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16C74BT-04E/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- Automotive E-grade temperature window (مقابلPIC16C74BT-04/PQ)
- Same TQFP-44 surface-mount footprint for modern reflow assembly (مقابلPIC16C74B-04E/L)
- Larger code space than mid-tier siblings (مقابلPIC16C65B-04I/PT)
ملاحظات التصميم
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.
معلومات الامتثال
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.