PIC16LF74T-I/PTG - 8-Bit MCU, 7KB Flash, 20MHz, 44-TQFP | Microchip
MPN: PIC16LF74T-I/PTG ✓ فعالPIC16LF74T-I/PTG نمای کلی
A PIC16 mid-range 8-bit microcontroller (MCU) is a Harvard-architecture CMOS device with separate program and data buses optimized for deterministic interrupt response and low power consumption. The PIC16F family sits in the hierarchy: 8-bit MCU -> PIC16 mid-range -> PIC16F7x sub-family -> PIC16LF74. These MCUs integrate Flash program memory, SRAM, EEPROM, and rich on-chip peripherals into a single chip, reducing external component count in embedded designs.
Key features of the PIC16LF74T-I/PTG include a 20MHz maximum operating frequency, 33 digital I/O pins, a 10-bit Analog-to-Digital Converter (ADC), two Capture/Compare/PWM (CCP) modules, a USART for serial communication, an MSSP (Master Synchronous Serial Port) supporting SPI and I2C, and on-chip brown-out reset (POR/BOR), watchdog timer (WDT), and Power-on Reset. The wide 2.0V-5.5V operating range makes it compatible with both 3.3V and 5V systems.
The PIC16F7x architecture uses a 14-bit instruction word with a single accumulator (W register) and a 4-bank memory model. Core peripherals include TIMER0/1/2, the 10-bit ADC, and the CCP modules; in-circuit serial programming (ICSP) enables in-field firmware updates via two pins. Compared with newer PIC16F1xxx enhanced mid-range cores, this classic mid-range part retains a software-stack-compatible instruction set prized for legacy code reuse.
Typical applications include industrial control, motor drive interfacing, HVAC sensor conditioning, embedded data acquisition with the on-chip ADC, low-power battery instrumentation, and consumer white-goods control. The 33 I/O count and TQFP-44 footprint suit designs that need a balance of analog inputs, PWM channels, and serial interfaces on a moderate-density PCB.
When designing with this device, verify the oscillator configuration (HS/RC/XT) against the chosen crystal or resonator and ensure MCLR is correctly tied for proper reset. The internal ADC requires the AVDD/AVSS pins be properly decoupled, and CCP/PWM outputs must not exceed absolute maximum ratings on the I/O pins.
This page synthesizes distributor pricing, same-package drop-in alternatives from Microchip's PIC16 family, and practical design notes not found on the manufacturer datasheet landing page. All specifications verified against the Microchip PIC16F7x datasheet family document.
جایگزین‌های drop-in برای PIC16LF74T-I/PTG — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC16LF74T-I/PTG (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در ADC, Core Architecture, Timers, Package, Operating Temperature.
PIC16F74-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16LF74-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC16LF74-I/L
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16LF747-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16F747-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16LF74T-I/PTG حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core | PIC16 8-bit RISC |
| Program Memory | 7 KB Flash (4K x 14) |
| RAM | 192 bytes |
| حداکثر فرکانس کلاک | 20 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 33 |
| ADC | 10-bit, 8 channels |
| CCP/PWM Modules | 2 |
| Communication Peripherals | USART, MSSP (SPI/I2C) |
| Timers | TIMER0, TIMER1, TIMER2 |
| دمای کاری | -40 C to +85 C (Industrial) |
| بسته‌بندی | 44-TQFP (10x10 mm) |
| نوع نصب | Surface Mount |
| سطح MSL | 3 (per JEDEC J-STD-020) |
| وضعیت RoHS | Compliant (lead-free "G" suffix) |
| ICSP (In-Circuit Serial Programming) | Yes |
| Brown-out Reset / Power-on Reset | Yes (BOR/POR) |
| Watchdog Timer | Yes |
پیکربندی پین PIC16LF74T-I/PTG
| پین 1 | MCLR/VPP — Master Clear reset input / programming voltage |
| پین 2 | RA0/AN0 — PORTA bit 0 / ADC analog input 0 |
| پین 3 | RA1/AN1 — PORTA bit 1 / ADC analog input 1 |
| پین 4 | RA2/AN2/VREF- — PORTA bit 2 / ADC analog input 2 / negative reference |
| پین 5 | RA3/AN3/VREF+ — PORTA bit 3 / ADC analog input 3 / positive reference |
| پین 6 | RA4/T0CKI — PORTA bit 4 / TIMER0 clock input |
| پین 7 | RA5/AN4/SS — PORTA bit 5 / ADC analog input 4 / SPI slave select |
| پین 8 | RE0/RD/AN5 — PORTRE bit 0 / read control / ADC analog input 5 |
| پین 9 | RE1/WR/AN6 — PORTRE bit 1 / write control / ADC analog input 6 |
| پین 10 | RE2/CS/AN7 — PORTE bit 2 / chip select / ADC analog input 7 |
| پین 11 | VDD — Positive supply voltage |
| پین 12 | VSS — Ground reference |
| پین 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| پین 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| پین 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / TIMER1 oscillator output / TIMER1 clock input |
| پین 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / TIMER1 oscillator input / CCP2 output |
| پین 17 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM/capture/compare output |
| پین 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| پین 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port data bit 0 |
| پین 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port data bit 1 |
| پین 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port data bit 2 |
| پین 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port data bit 3 |
| پین 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| پین 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| پین 25 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| پین 26 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| پین 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port data bit 4 |
| پین 28 | RD5/PSP5 — PORTD bit 5 / parallel slave port data bit 5 |
| پین 29 | RD6/PSP6 — PORTD bit 6 / parallel slave port data bit 6 |
| پین 30 | RD7/PSP7 — PORTD bit 7 / parallel slave port data bit 7 |
| پین 31 | VSS — Ground reference |
| پین 32 | VDD — Positive supply voltage |
| پین 33 | RB0/INT — PORTB bit 0 / external interrupt |
| پین 34 | RB1 — PORTB bit 1 |
| پین 35 | RB2 — PORTB bit 2 |
| پین 36 | RB3/PGM — PORTB bit 3 / low-voltage programming |
| پین 37 | RB4 — PORTB bit 4 |
| پین 38 | RB5 — PORTB bit 5 |
| پین 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| پین 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| پین 41 | AVSS — Analog ground reference |
| پین 42 | AVDD — Analog positive supply voltage |
| پین 43 | NC — Not connected (per datasheet) |
| پین 44 | NC — Not connected (per datasheet) |
کاربردهای معمول
PIC16LF74T-I/PTG مناسب است برای 6 کاربردs: Industrial Control and Automation, HVAC Sensor Conditioning, Motor Drive Interfacing, Embedded Data Acquisition, Low-Power Battery Instrumentation, Consumer White Goods Control.
Industrial Control and Automation
The PIC16LF74T-I/PTG fits industrial control applications because of its 33 I/O pins, two CCP/PWM modules, and 10-bit ADC that together provide closed-loop control of actuators and sensors on a single chip. With a 20 MHz core, the CPU can sample sensors at hundreds of Hz while still driving PWM outputs for motor or valve actuation, and the 2.0V-5.5V supply range supports both 3.3V sensor rails and 5V driver stages. The industrial -40C to +85C temperature rating ensures operation in factory cabinets and outdoor enclosures without derating. Compared with discrete logic, this MCU integrates BOR/POR, WDT, and timers that reduce BOM and PCB area. Place decoupling 0.1uF close to VDD and use shielded cabling for analog inputs in noisy industrial environments.
پیشنهادی
HVAC Sensor Conditioning
The PIC16LF74T-I/PTG suits HVAC sensor conditioning boards that read temperature, humidity, and pressure transducers and drive relay or triac outputs for fans, compressors, and valves. Its 8-channel 10-bit ADC is sufficient for 0.1C-resolution thermistor and ratiometric pressure sensor interfaces, while the two CCP/PWM channels drive proportional valve or damper actuators. The 192-byte RAM is adequate for average filtering and PID calculation loops at HVAC update rates. Operating from 2.0V-5.5V permits direct connection to 3.3V sensors without level shifters. The internal BOR protects against brown-out conditions common in HVAC wiring when inductive loads switch. Add MOV protection on relay outputs and RC snubbers on triac outputs to survive the harsh electrical environment.
پیشنهادی
Motor Drive Interfacing
The PIC16LF74T-I/PTG operates as a motor drive interface controller, generating PWM and direction logic for external MOSFET or gate-driver stages driving brushed DC, stepper, or small BLDC motors. With two CCP/PWM modules, the device can produce complementary PWMs up to 20 kHz with adjustable dead-band via firmware, while TIMER2 provides a stable PWM timebase. The 33 digital I/O lines support multiple encoder or Hall-sensor feedback inputs plus fault inputs from gate drivers. The 20 MHz CPU executes PID control loops at 10 kHz update rates, suitable for pumps, fans, and small conveyor systems. Always include flyback diodes or TVS protection on motor terminals and isolate digital grounds from power-stage returns.
پیشنهادی
Embedded Data Acquisition
The PIC16LF74T-I/PTG is well-suited to small data-acquisition systems that read multiple analog channels and forward data over serial links. Its 10-bit ADC with 8 input channels handles thermocouple, strain-gauge, and process-voltage signals at sample rates up to ~50 ksps, while the on-chip USART streams formatted data to a host PC or PLC. The MSSP module supports SPI slave connections to external ADCs or sensor front-ends for higher precision when needed. The 7 KB Flash accommodates modest buffering and command parsing, and the 192-byte RAM is enough for short sample bursts. Add a precision voltage reference and low-pass input filtering on ADC channels for repeatable measurements in noisy environments.
پیشنهادی
Low-Power Battery Instrumentation
The PIC16LF74T-I/PTG "LF" low-voltage variant operates down to 2.0V, making it suitable for two-AA-battery or single-cell Li-Ion battery-powered instruments that must run for years on a single charge. The PIC16 mid-range core supports Sleep mode with sub-microamp quiescent current, waking on watchdog or external interrupts to take periodic measurements. The 192-byte RAM is sufficient for short sample-and-average buffers, and the 7 KB Flash holds compact control firmware without external memory. ADC measurements from a single 3V coin cell remain accurate thanks to the LF rail. Always include a low-dropout regulator or direct battery connection and verify Sleep current under your specific load configuration before finalizing the BOM.
پیشنهادی
Consumer White Goods Control
The PIC16LF74T-I/PTG provides a cost-effective control solution for consumer white-goods such as washing machines, dishwashers, refrigerators, and microwave ovens that need analog sensing, digital I/O, and PWM actuator drive on a tight BOM. Its integrated ADC reads water level, temperature, and door-switch sensors, while PWM channels drive motor and heater elements. The USART enables Wi-Fi or Bluetooth module connectivity for smart-appliance variants. The 44-TQFP and industrial temperature rating suit sealed control boards mounted inside appliance cabinets. Add opto-isolation on mains-coupled relay drivers and verify IEC 60730 Class B safety compliance for unattended-operation appliances.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC16LF74T-I/PTG — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC16F74-I/PT | PIC16LF74-I/PT | PIC16LF74-I/L | PIC16LF747-I/PT | PIC16F747-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Operating Voltage Range | 2.0 V to 5.5 V | 4.5 V to 5.5 V (standard F) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 4.5 V to 5.5 V (standard F) |
| Program Memory | 7 KB Flash (4K x 14) | 7 KB Flash (4K x 14) | 7 KB Flash (4K x 14) | 7 KB Flash (4K x 14) | 7 KB Flash (4K x 14) | 7 KB Flash (4K x 14) |
| RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 14-bit, 11 channels (enhanced) | 14-bit, 11 channels (enhanced) |
| I/O Pins | 33 | 33 | 33 | 33 | 36 | 36 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
تفاوت‌های کلیدی
- Wide 2.0 V-5.5 V operating voltage range (در مقابلPIC16F74-I/PT)
- Industrial temperature rating on a classic mid-range core (در مقابلPIC16LF747-I/PT)
- Tape-and-reel packaging for high-volume SMT (در مقابلPIC16LF74-I/PT)
- 33 I/O pins in a compact 44-TQFP footprint (در مقابلPIC16F74-I/PT)
یادداشت‌های طراحی
The PIC16LF74T-I/PTG requires a clean VDD supply between 2.0 V and 5.5 V with proper decoupling. Place a 0.1 uF ceramic bypass capacitor as close as possible to each VDD pin (pins 11 and 32) and a bulk capacitor (10 uF or larger) on the supply rail. The AVDD/AVSS pins (41/42) should be decoupled separately with their own 0.1 uF + 10 uF network to keep ADC measurements free of digital switching noise. The internal brown-out reset (BOR) module triggers at a configurable voltage threshold to prevent code execution at marginal supply levels; configure it via configuration bits during programming.
PCB layout for the 44-TQFP package requires careful attention to analog and digital ground separation. Use a single-point ground connection or a star-ground pattern at the VSS pins, and route analog signals (ADC inputs, VREF) over a quiet analog ground plane if possible. Keep high-frequency traces (OSC, PWM outputs) away from sensitive analog inputs to minimize crosstalk. The MCLR pin (1) must have a pull-up resistor to VDD and a 0.1 uF decoupling capacitor to suppress noise that could cause spurious resets; the ICSP clock and data pins (RB6/RB7) should have series resistors near the IC to prevent programming interference.
Common pitfalls when designing with PIC16LF74T-I/PTG: (1) forgetting to configure the oscillator mode (HS/RC/XT/LP) in the configuration bits, which can prevent startup with the chosen crystal; (2) leaving the MCLR pin floating without a pull-up, which causes intermittent resets; (3) reading the ADC without allowing adequate acquisition time (typically 19.72 uS at 20 MHz for 10-bit accuracy), which yields noisy readings; (4) exceeding the absolute maximum I/O current of 25 mA per pin or 200 mA per port, which can damage the device; and (5) writing to Flash during code execution without proper unlock sequence, which may lock the device. Always consult the PIC16F7x datasheet family document and validate timing with MPLAB X IDE simulation before prototype bring-up.
اطلاعات انطباق
RoHS compliance indicated by trailing "G" suffix per Microchip part number convention. AEC-Q100 not applicable (this is a non-automotive-grade MCU). Halogen-free status not explicitly stated in verified data - set to unknown. REACH compliance confirmed by Microchip product environmental declarations.