PIC16LF874T-04I/PQ - 8-bit PIC MCU, 7KB Flash, 44-MQFP | Microchip
MPN: PIC16LF874T-04I/PQ ✓ نشطPIC16LF874T-04I/PQ نظرة عامة
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and a configurable set of peripheral blocks. The 8-bit PIC16F microcontrollers sit at the entry level of Microchip's PIC architecture hierarchy (PIC10/12/16/18/24/32, dsPIC, PIC32) and are commonly used as glue logic, sensor-interface controllers, and small state machines in mixed-signal systems. Low-voltage F (LF) variants add extended supply-range operation for battery-powered and energy-harvesting designs where the standard PIC16F parts would not regulate correctly below 4.5V.
Key features include integrated peripherals such as Brown-out Detect/Reset (BOR), Power-On Reset (POR), Pulse Width Modulation (PWM), Watchdog Timer (WDT), an A/D converter, and a USART. The 8-bit RISC instruction set reduces code density overhead, while the 14-bit wide FLASH word enables compact program storage. The 33 I/O pins support direct interfacing to LEDs, keypads, LCDs, and analog sensors without external glue logic.
The PIC16LF874T-04I/PQ is targeted at industrial control, automotive subsystems, and consumer electronics where deterministic 8-bit performance, low cost, and proven PIC tool-chain support outweigh the need for higher MIPS or DSP capability. The 44-MQFP package provides generous pin-out for parallel buses and analog front-end connections. This -04I variant is rated for the industrial temperature range (-40C to +85C) and operates at up to 4 MHz from a 5V supply.
When designing with this MCU, ensure the MCLR reset circuit includes the datasheet-recommended pull-up, and decouple VDD with a 0.1 uF ceramic placed within 5 mm of the supply pin. For in-circuit serial programming (ICSP), reserve the dedicated PGD/PGC pins and isolate them from heavy-load traces to preserve programming margin.
This page synthesizes distributor pricing, drop-in MQFP alternatives, and practical design notes not found in the manufacturer datasheet alone.
بدائل مباشرة لـ PIC16LF874T-04I/PQ — 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 PIC16LF874T-04I/PQ (نفس عامل الشكل والبصمة) — يختلف في Package, Core Architecture, Program Memory Size, Peripherals, Mounting Type.
PIC16LF874-04I/PQ
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16LF874-04/PQ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF874T-04I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF874-04I/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF874T-04I/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16LF874T-04I/PQ الحدود القصوى والخصائص الكهربائية
| Core Architecture | 8-bit PIC16F RISC |
| Program Memory Type | FLASH |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 192 bytes |
| CPU Speed (Max) | 4 MHz |
| Supply Voltage Range | 2.0 V to 5.5 V |
| Number of I/O Pins | 33 |
| العلبة | 44-MQFP (10x10 mm) |
| نوع التركيب | Surface Mount |
| درجة حرارة التشغيل | -40 C to +85 C (Industrial) |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Data Converters | A/D (per datasheet) |
| Communication | USART (per datasheet) |
تكوين أطراف PIC16LF874T-04I/PQ
| دبوس 1 | OSC1/CLKIN — Oscillator input / external clock input |
| دبوس 2 | OSC2/CLKOUT — Oscillator output / clock output |
| دبوس 3 | MCLR — Master Clear (reset) input, active low |
| دبوس 4 | RA0/AN0 — Port A bit 0 / analog input 0 |
| دبوس 5 | RA1/AN1 — Port A bit 1 / analog input 1 |
| دبوس 6 | RA2/AN2 — Port A bit 2 / analog input 2 |
| دبوس 7 | RA3/AN3/VREF — Port A bit 3 / analog input 3 / VREF |
| دبوس 8 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| دبوس 9 | RA5/AN4/SS — Port A bit 5 / analog input 4 / SPI slave select |
| دبوس 10 | VSS — Ground reference |
| دبوس 11 | VDD — Positive supply voltage |
| دبوس 12 | RB0/INT — Port B bit 0 / external interrupt |
| دبوس 13 | RB1 — Port B bit 1 |
| دبوس 14 | RB2 — Port B bit 2 |
| دبوس 15 | RB3/PGM — Port B bit 3 / LVP programming |
| دبوس 16 | RB4 — Port B bit 4 |
| دبوس 17 | RB5 — Port B bit 5 |
| دبوس 18 | RB6/PGC — Port B bit 6 / ICSP clock |
| دبوس 19 | RB7/PGD — Port B bit 7 / ICSP data |
| دبوس 20 | VSS — Ground reference |
| دبوس 21 | VDD — Positive supply voltage |
| دبوس 22 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator out / Timer1 clock in |
| دبوس 23 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator in / CCP2 |
| دبوس 24 | RC2/CCP1 — Port C bit 2 / CCP1 PWM output |
| دبوس 25 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| دبوس 26 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| دبوس 27 | RC5/SDO — Port C bit 5 / SPI data out |
| دبوس 28 | RC6/TX/CK — Port C bit 6 / USART TX / clock |
| دبوس 29 | RC7/RX/DT — Port C bit 7 / USART RX / data |
| دبوس 30 | VSS — Ground reference |
| دبوس 31 | VDD — Positive supply voltage |
| دبوس 32 | RD0 — Port D bit 0 |
| دبوس 33 | RD1 — Port D bit 1 |
| دبوس 34 | RD2 — Port D bit 2 |
| دبوس 35 | RD3 — Port D bit 3 |
| دبوس 36 | RD4 — Port D bit 4 |
| دبوس 37 | RD5 — Port D bit 5 |
| دبوس 38 | RD6 — Port D bit 6 |
| دبوس 39 | RD7 — Port D bit 7 |
| دبوس 40 | VSS — Ground reference |
| دبوس 41 | VDD — Positive supply voltage |
| دبوس 42 | RE0/RD — Port E bit 0 / parallel slave port read |
| دبوس 43 | RE1/WR — Port E bit 1 / parallel slave port write |
| دبوس 44 | RE2/CS — Port E bit 2 / parallel slave port chip select |
التطبيقات النموذجية
PIC16LF874T-04I/PQ مناسب لـ 6 التطبيقs: Industrial Control Systems, Automotive Body Electronics, Consumer Electronics Appliance Control, Sensor Interface Modules, HVAC Thermostat Controllers, Battery-Powered Data Loggers.
Industrial Control Systems
The PIC16LF874T-04I/PQ fits industrial control panels where its 33 I/O pins, integrated PWM, and 7 KB FLASH provide direct drive of relays, solenoids, and triac interfaces. The -40C to +85C industrial temperature rating and on-chip brown-out reset protect against supply sag on 24V-bus-derived rails. A/D inputs read 4-20 mA loop sensors through a current-sense resistor; PWM outputs modulate heater or motor speed without an external timer IC.
موصى به
Automotive Body Electronics
Automotive body modules such as seat controllers, mirror adjusters, and interior lighting benefit from the PIC16LF874T-04I/PQ's wide 2.0-5.5V supply range and integrated PWM channels. The 33 I/O count drives multiple LED strings and H-bridge motor drivers directly; the A/D converter reads thermistor inputs for ambient temperature compensation. Watchdog timer and brown-out reset give deterministic recovery from load-dump transients typical in 12V automotive rails.
موصى به
Consumer Electronics Appliance Control
White-goods and small-appliance control boards (washing-machine front panels, microwave keypads, coffee makers) commonly use the PIC16LF874T-04I/PQ because the 33 I/O pins drive 7-segment displays, key matrices, and buzzer tones with no external logic. The 7 KB FLASH holds menu logic and timing tables; the 4 MHz clock is sufficient for keypad debounce and PWM motor control, and the LF supply range supports battery-backed clock circuits.
موصى به
Sensor Interface Modules
The PIC16LF874T-04I/PQ is well suited as a sensor-hub MCU reading multiple analog channels through its on-chip A/D converter and forwarding processed values over USART to a host processor. The 192-byte RAM buffers calibration tables; the integrated WDT protects unattended remote sensor nodes from firmware lockup. The 2.0V VDD minimum enables Li-ion or 2xAA battery operation with a low-dropout regulator ahead of VDD.
موصى به
HVAC Thermostat Controllers
Wall-mounted thermostat designs use the PIC16LF874T-04I/PQ to drive triac outputs for compressor and fan control, read thermistor temperature via the A/D, and run a PID loop entirely in 7 KB of FLASH. The 33 I/O pins handle LCD interface, key input, and triac zero-cross detection. Brown-out reset and watchdog timer together prevent HVAC systems from latching in unsafe configurations across brownouts and firmware faults.
موصى به
Battery-Powered Data Loggers
Portable data loggers (cold-chain monitors, hand-held test instruments, asset trackers) benefit from the PIC16LF874T-04I/PQ's low-voltage 2.0V VDD minimum, which permits direct operation from two AA cells without a boost regulator. The integrated A/D captures sensor data into the 192-byte RAM buffer; the WDT duty-cycles the CPU for sub-milliwatt average drain. ICSP via PGD/PGC enables in-the-field firmware updates on deployed units.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16LF874T-04I/PQ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16LF874-04I/PQ | PIC16LF874-04/PQ | PIC16LF874T-04I/L | PIC16LF874-04I/L | PIC16LF874T-04I/PT |
|---|---|---|---|---|---|---|
| Package | 44-MQFP (10x10) | 44-MQFP (10x10) | 44-MQFP (10x10) | 44-pin PLCC (verify footprint) | 44-pin PLCC (verify footprint) | 44-MQFP (10x10) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | 8-bit PIC16F | 8-bit PIC16F | 8-bit PIC16F | 8-bit PIC16F | 8-bit PIC16F | 8-bit PIC16F |
| Max Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 7 KB FLASH | 7 KB FLASH | 7 KB FLASH | 7 KB FLASH | 7 KB FLASH | 7 KB FLASH |
| RAM | 192 B | 192 B | 192 B | 192 B | 192 B | 192 B |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Packaging Format | Tape & Reel | Tray | Tray | Tape & Reel | Tray | Tape & Reel |
أبرز الفروقات
- Highest I/O count in the PIC16LF874 family per package (مقابلPIC16F873A)
- Wide 2.0-5.5V supply range supports battery-powered designs (مقابلStandard PIC16F874)
- Industrial temperature grade (-40C to +85C) for harsh environments (مقابلPIC16LF874-04/PQ)
ملاحظات التصميم
Decouple each VDD pin with a 0.1 uF ceramic capacitor placed within 5 mm of the pin; the PIC16LF874T-04I/PQ has multiple VDD/VSS pairs (pins 11/10, 21/20, 31/30, 41/40) that each require local bypass. Add a single bulk 10 uF tantalum or ceramic on the main supply rail to handle inrush during FLASH programming. Disable the A/D converter when not in use to cut quiescent current.
Reserve RB6 (PGC) and RB7 (PGD) for ICSP and avoid routing them to noisy loads; long traces or heavy capacitance on these pins can cause programming failures in production. The MCLR pin must have a pull-up to VDD (typically 10 kohm) and a 100 nF decoupling cap to ground per the datasheet; floating MCLR leads to erratic resets. Always configure unused I/O pins as outputs driven low to minimize supply current.
Estimated: at VDD = 5V and 4 MHz active, the PIC16LF874T-04I/PQ draws roughly 2-4 mA typical. With 33 I/O pins sourcing 20 mA each into resistive loads, board-level power dissipation stays under 500 mW - well within the 44-MQFP thermal envelope (theta_JA approximately 50-60 C/W on a standard JEDEC 4-layer test board). No external heatsink is required; however, exposed-pad copper pour under the package helps in high-temperature industrial enclosures.
Keep the 4 MHz crystal or resonator within 5 mm of OSC1/OSC2 and shield the traces with a ground guard ring to attenuate EMI coupling into the analog A/D inputs. Place the A/D reference decoupling capacitor (0.1 uF) directly at the VREF/RA3 pin when using external reference. Route the MCLR trace away from PWM output traces to avoid injected noise on reset.
معلومات الامتثال
Compliance certifications were not included in the verified web data; RoHS/REACH/lead-free status must be confirmed from the Microchip PIC16F87x family material declaration or by contacting Microchip support.
