PIC16F1574-E/JQ - 8-Bit MCU, 32MHz, 7KB Flash, 16-UQFN | Microchip
MPN: PIC16F1574-E/JQ ✓ Hoạt độngPIC16F1574-E/JQ Tóm tắt
What is an 8-bit microcontroller? An MCU (microcontroller unit) is a single-chip computer that integrates a CPU core, program memory (typically Flash), data RAM, and a rich set of peripherals (ADC, timers, PWM, communication blocks) into one package. 8-bit MCUs from the PIC16 family occupy the low-power, deterministic end of the embedded spectrum, sitting under the umbrella hierarchy: microcontroller -> embedded processor -> semiconductor IC. They are widely used when the application needs deterministic interrupt latency, low quiescent current, and a small code footprint rather than the multi-GHz throughput of an ARM Cortex-M device.
The PIC16F1574-E/JQ's distinguishing features are four 16-bit PWMs with independent timers (high-resolution PWM for LED lighting and motor control), a 10-bit ADC, two comparators, a 5-bit DAC, a single USART, and 12 I/O lines. The 16-bit PWM resolution is the headline feature - it allows precise dimming and current control that 8-bit or 10-bit PWM MCUs cannot match without external timing ICs.
Architecturally, the device uses a Harvard RISC core with a 14-bit instruction word and a hardware multiplier, providing deterministic 1-cycle instruction execution (except branches). The 7 KB self-programmable Flash supports In-Circuit Serial Programming (ICSP) for field updates, and the 512 B SRAM provides headroom for protocol stacks, lighting state machines, and small control loops.
Typical applications include high-resolution LED lighting drivers (RGBW or tunable white), BLDC fan and pump motor control via complementary PWM, general-purpose sensor signal conditioning, and consumer/industrial white-goods control. The automotive-grade temperature range and small UQFN footprint also fit HMI (human-machine interface) and IoT edge-node designs where board area is constrained.
When designing, note that Vdd must be decoupled with 100 nF and bulk capacitors close to the ICSP/VDD pins, and unused I/O should be configured as outputs low to minimize power. The PIC16F1574-E/JQ is the extended-temperature ("-E") variant; the "-I" grade is industrial-only (0 °C to +85 °C).
This page synthesizes distributor pricing, cross-reference alternatives, and practical design notes that go beyond the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16F1574-E/JQ — 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 PIC16F1574-E/JQ (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, Program Memory (Flash), DAC.
PIC16F1575-E/JQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F1578-E/JQ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F1579-E/JQ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F15325-E/JQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F15313-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F1455-I/JQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F1574-E/JQ Tỷ lệ tối đa & tính chất điện
| Core | PIC16 (8-bit RISC, Harvard) |
| Program Memory (Flash) | 7 KB (4K x 14) |
| Data Memory (SRAM) | 512 B |
| Maximum CPU Frequency | 32 MHz |
| Supply Voltage (VDD) | 2.5 V to 3.6 V |
| Nhiệt độ hoạt động | -40 °C to +125 °C (Extended "-E") |
| I/O Pins | 12 |
| PWM Channels | 4 x 16-bit |
| ADC | 10-bit |
| Comparators | 2 |
| DAC | 1 x 5-bit |
| Timers | 7 |
| USART | 1 |
| Hộp | 16-UQFN (4x4 mm), JQ suffix |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16F1574-E/JQ
| Chân 1 | RA5 — Bidirectional I/O / ICSP programming data |
| Chân 2 | RA4 — Bidirectional I/O |
| Chân 3 | RA3 — Bidirectional I/O / MCLR (reset, weak pull-up) |
| Chân 4 | RA2 — Bidirectional I/O |
| Chân 5 | RA1 — Bidirectional I/O / ICSPCLK |
| Chân 6 | RA0 — Bidirectional I/O |
| Chân 7 | VSS — Ground reference |
| Chân 8 | RA7 — Bidirectional I/O / DAC1OUT (5-bit DAC output) |
| Chân 9 | RA6 — Bidirectional I/O |
| Chân 10 | RC0 — Bidirectional I/O |
| Chân 11 | RC1 — Bidirectional I/O |
| Chân 12 | RC2 — Bidirectional I/O |
| Chân 13 | RC3 — Bidirectional I/O |
| Chân 14 | RC4 — Bidirectional I/O |
| Chân 15 | RC5 — Bidirectional I/O |
| Chân 16 | VDD — Positive supply (2.5 V - 3.6 V); EP must be soldered to GND plane |
Ứng dụng tiêu biểu
PIC16F1574-E/JQ phù hợp cho 6 Áp dụngs: High-Resolution LED Lighting Driver, BLDC Fan and Small Motor Control, Sensor Signal Conditioning and IoT Edge Node, Human-Machine Interface (HMI) Control, Consumer White-Goods and Small Appliances, Industrial Control and Automation Modules.
High-Resolution LED Lighting Driver
The PIC16F1574-E/JQ's four 16-bit PWM channels with independent timers are the defining feature for precision LED lighting. Each 16-bit PWM channel delivers 65536 steps of duty-cycle resolution - roughly 256x finer than an 8-bit PWM - which directly eliminates visible flicker in dim-to-warm and RGBW tunable-white fixtures, and removes perceptible stepping at low brightness levels. The MCU drives MOSFET gates directly from its I/O pins, removing the need for an external PWM controller IC. The 32 MHz core gives the firmware headroom for DMX-512 or DALI parsing alongside the lighting control loop, and the 7 KB Flash is ample for full state-machine and color-mixing code. Designers should size the bypass capacitance on VDD per the datasheet and use the exposed pad as a thermal sink if the PCB sits behind high-power LEDs.
Được đề xuất
BLDC Fan and Small Motor Control
The PIC16F1574-E/JQ fits low-power brushless DC fan and pump control where 16-bit PWM resolution translates directly into smoother commutation and lower acoustic noise. Its four 16-bit PWM outputs can drive a three-phase bridge plus a brake or tacho-capture channel, while the 10-bit ADC samples back-EMF or current-sense signals for sensorless or hall-assisted commutation. The hardware comparator blocks enable zero-cross detection with no CPU overhead, and the 32 MHz instruction rate supports sensorless back-EMF algorithms at typical fan speeds (up to a few kHz electrical). Compared with stepping up to a dedicated motor-control MCU, this part saves cost in applications such as appliance fans and small pumps.
Được đề xuất
Sensor Signal Conditioning and IoT Edge Node
The 10-bit ADC, two comparators, 5-bit DAC, and 12 I/O make the PIC16F1574-E/JQ a strong fit for sensor-signal conditioning in IoT edge nodes. The on-chip comparators handle threshold detection (e.g., for NTC thermistor or photodiode front-ends) without external op-amps, while the 10-bit ADC is sufficient for environmental sensors like temperature, humidity, and ambient light. The USART talks to an external radio module (LoRa, sub-GHz, BLE) or Wi-Fi co-processor, and the small 16-UQFN footprint lets the MCU sit on a coin-cell PCB next to the radio. The 2.5-3.6 V VDD range matches a single Li-ion or two alkaline cells with no extra regulation.
Được đề xuất
Human-Machine Interface (HMI) Control
In HMI subsystems - appliance keypads, thermostat touch-button rings, simple industrial control panels - the PIC16F1574-E/JQ provides the deterministic response that capacitive-touch and rotary-encoder inputs require. The 32 MHz core scans capacitive-touch buttons via the mTouch peripheral or reads mechanical encoders through the on-chip timers, while the 16-bit PWM channels smoothly backlight LEDs and indicator rings without flicker. The USART connects to a host display or main appliance controller, and the 7 KB Flash comfortably holds state-machine and debounce code. The 4 x 4 mm UQFN footprint enables placement behind a small display or touch pad.
Được đề xuất
Consumer White-Goods and Small Appliances
The PIC16F1574-E/JQ sits in the sweet spot for cost-sensitive white-goods sub-systems: coffee machines, rice cookers, kitchen scales, and small air-quality monitors. The Extended (-40 to +125 °C) temperature grade handles steam and proximity-heat exposure near the appliance boundary, and the 2.5-3.6 V VDD range allows direct battery or wall-adapter regulation. The 16-bit PWM drives heating elements, valves, or buzzer tones with fine-grained duty-cycle control, while the ADC reads temperature, weight, or gas-sensor inputs. Microchip's MPLAB X IDE and XC8 toolchain shorten firmware development for appliance engineers migrating from older PIC12/PIC16 parts.
Được đề xuất
Industrial Control and Automation Modules
The Extended temperature grade and small UQFN package suit industrial control modules such as small PLC slices, sensor hubs, and I/O expanders. The PIC16F1574-E/JQ's deterministic interrupt response (PIC16 core executes most instructions in one cycle) is valuable for time-critical I/O scanning, while the USART interfaces to RS-485 transceivers or industrial bus bridges. The on-chip comparators handle 0-10 V or 4-20 mA analog front-end thresholds, and the four 16-bit PWM channels drive proportional valves or indicator LEDs. The 7 KB Flash covers typical small-module state machines and protocol handlers without overflowing.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F1574-E/JQ — 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 | PIC16F1575-E/JQ | PIC16F1578-E/JQ | PIC16F1579-E/JQ | PIC16F15325-E/JQ | PIC16F1455-I/JQ |
|---|---|---|---|---|---|---|
| Package | 16-UQFN (4x4), JQ | 16-UQFN (4x4), JQ - same | 16-UQFN (4x4), JQ - same | 16-UQFN (4x4), JQ - same | 16-UQFN (4x4), JQ - same | 16-UQFN (4x4), JQ - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 7 KB | 14 KB | 7 KB | 14 KB | 14 KB | 14 KB |
| SRAM | 512 B | 1 KB | 512 B | 1 KB | 1 KB | 1 KB |
| Max CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 48 MHz |
| PWM Channels | 4 x 16-bit | 4 x 16-bit | 4 x 16-bit | 4 x 16-bit | 4 x 10-bit | 2 x 10-bit |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 12-bit | 10-bit |
| Operating Voltage | 2.5 V - 3.6 V | 2.5 V - 3.6 V | 2.5 V - 3.6 V | 2.5 V - 3.6 V | 2.3 V - 5.5 V | 2.5 V - 5.5 V |
| Temperature Grade | Extended (-40 to +125 °C) | Extended (-40 to +125 °C) | Extended (-40 to +125 °C) | Extended (-40 to +125 °C) | Extended (-40 to +125 °C) | Industrial (0 to +85 °C) |
Bảo phân biệt quan trọng
- Four 16-bit PWM channels with independent timers (vsPIC16F1455-I/JQ)
- Smallest Flash in the family, lowest unit cost (vsPIC16F1575-E/JQ)
- 5-bit DAC plus 10-bit ADC plus 2 comparators on-chip (vsPIC16F15325-E/JQ)
Ghi chú thiết kế
The PIC16F1574-E/JQ operates from a single 2.5 V to 3.6 V supply. Place a 100 nF ceramic decoupling capacitor as close as possible to VDD (pin 16) and add a bulk capacitor (4.7 µF to 10 µF) on the same trace. The exposed pad (EP) under the UQFN must be soldered to a ground plane; it is both the primary thermal path and a ground reference. Per the PIC16(L)F1574 datasheet, exceeding 3.6 V is an absolute-maximum violation.
Estimated: the 16-UQFN package has a theta_JA of approximately 39 °C/W on a standard 2-layer JEDEC test board (per Microchip package thermal data). At the typical 5-10 mA active current and 3.3 V supply, self-heating is well under 1 °C and thermal management is straightforward. However, if the design drives high-current PWM directly from the I/O pins, consider the additional dissipation in the output transistors and provide adequate copper on inner layers.
The 16-UQFN (4 x 4 mm) JEDEC land pattern requires a center thermal pad with via stitching to the ground plane for thermal and electrical performance. Per IPC-7351, the EP vias should be 0.2-0.3 mm drilled, 0.5 mm pitch, plugged or tented to prevent solder wicking. Keep analog traces (ADC, comparators) short and away from PWM switching edges to minimize coupling noise.
Common pitfalls include: (1) leaving the MCLR/RA3 pin un-pulled-up - this prevents ICSP programming and leaves the MCU in reset; (2) configuring unused I/O as analog inputs without disabling digital inputs - this wastes current; (3) relying on the internal oscillator without calibration when UART accuracy is critical - use the INTOSC with the OSCTUNE register or an external crystal for UART comms above 9600 baud.
Thông tin tuân thủ
RoHS and lead-free status per Microchip product page. AEC-Q100 automotive qualification not claimed on the standard -E/JQ; for full automotive-grade parts use Microchip -VAO suffixes.
