PIC16LF1902-E/SS - 8-Bit 20MHz 3.5KB Flash MCU w/ LCD | Microchip
MPN: PIC16LF1902-E/SS ✓ Hoạt độngPIC16LF1902-E/SS Tóm tắt
An 8-bit PIC microcontroller is a small, low-power RISC processor that executes one instruction per clock cycle from a Harvard-architecture instruction set. The PIC16F family combines Flash program memory with rich on-chip peripherals (ADC, timers, LCD driver, EUSART) in a single IC, sitting in the broader taxonomy: microcontroller -> embedded MCU -> semiconductor IC. XLP (eXtreme Low Power) variants extend battery life to multi-year levels through nanoWatt sleep modes drawing well under 1 µA.
Key features include 49 instructions with 16 stack levels, self read/write Flash, support for up to 72 LCD segment drives via 4 common pins and up to 18 segment pins, an internal 16MHz oscillator, and EUSART communication. The extended instruction set allows efficient C and assembly programming while preserving the deterministic timing that PIC MCUs are known for in safety-critical control loops.
The architecture uses an enhanced mid-range core with a 14-bit instruction word and a hardware multiplier option. The integrated LCD charge pump and configurable segment multiplexing enable direct connection to glass displays without external driver ICs. Brown-out reset and the power-on reset together give clean startup across the entire 1.8-3.6V supply range, important for lithium-thionyl-chloride and consumer coin-cell applications.
Typical applications include battery-powered utility metering with segmented LCD, consumer remote controls, low-end medical devices such as glucose and temperature monitors, IoT sensor nodes, white-goods user interfaces, and automotive interior accessories like seat heaters and climate controls (note: the -E suffix is the extended automotive-grade temperature variant).
When designing with this part, place a 100nF decoupling capacitor close to VDD and consider the input leakage budget when selecting the LCD bias network. The -E temperature grade extends to +125°C operation, which should be confirmed in the datasheet for automotive under-hood designs.
This page synthesizes XAIPART distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF1902-E/SS — 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 PIC16LF1902-E/SS (cùng hình factor và footprint) — khác nhau ở ADC, Package, I/O Pins, I/O Source/Sink Current, Operating Temperature.
PIC16LF1902-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF1902T-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF1902-E/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF1903-I/SS
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF1902-E/SS Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit enhanced mid-range |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| Data SRAM | 128 bytes |
| Maximum CPU Frequency | 20 MHz |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 21 (varies by package) |
| ADC | 10-bit, 11 channels with voltage reference |
| Timers | 1 x 8-bit (TMR0), 1 x 16-bit (TMR1) |
| Watchdog Timer | Enhanced WDT (EWDT) |
| LCD Driver | Up to 72 segments (4 common + 18 segment pins) |
| Communication | EUSART |
| Internal Oscillator | 16 MHz |
| I/O Source/Sink Current | 25 mA |
| Brown-Out Reset | Yes (BOR) |
| Instruction Set | 49 instructions, 16 stack levels |
| Nhiệt độ hoạt động | -40C to +125C (E grade, extended) |
| Hộp | 28-pin SSOP (5.30 mm body) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16LF1902-E/SS
| Chân 1 | VDD — Positive supply voltage |
| Chân 2 | RA5 — Bidirectional I/O / SEG15 |
| Chân 3 | RA4 — Bidirectional I/O / SEG14 |
| Chân 4 | RA3 — Bidirectional I/O / MCLR |
| Chân 5 | RA2 — Bidirectional I/O / SEG13 |
| Chân 6 | RA1 — Bidirectional I/O / ICSPCLK |
| Chân 7 | RA0 — Bidirectional I/O / ICSPDAT |
| Chân 8 | RC7 — Bidirectional I/O / RX/DT |
| Chân 9 | RC6 — Bidirectional I/O / TX/CK |
| Chân 10 | RC5 — Bidirectional I/O |
| Chân 11 | RC4 — Bidirectional I/O |
| Chân 12 | RC3 — Bidirectional I/O / SCL |
| Chân 13 | RC2 — Bidirectional I/O / SDA |
| Chân 14 | VSS — Ground reference |
| Chân 15 | RC1 — Bidirectional I/O |
| Chân 16 | RC0 — Bidirectional I/O |
| Chân 17 | RB7 — Bidirectional I/O / SEG7 |
| Chân 18 | RB6 — Bidirectional I/O / SEG6 |
| Chân 19 | RB5 — Bidirectional I/O / SEG5 |
| Chân 20 | RB4 — Bidirectional I/O / SEG4 |
| Chân 21 | RB3 — Bidirectional I/O / SEG3 |
| Chân 22 | RB2 — Bidirectional I/O / SEG2 |
| Chân 23 | RB1 — Bidirectional I/O / SEG1 |
| Chân 24 | RB0 — Bidirectional I/O / SEG0 / INT |
| Chân 25 | RA7 — Bidirectional I/O / COM3 |
| Chân 26 | RA6 — Bidirectional I/O / COM2 |
| Chân 27 | VSS — Ground reference |
| Chân 28 | VDD — Positive supply voltage |
Ứng dụng tiêu biểu
PIC16LF1902-E/SS phù hợp cho 6 Áp dụngs: Battery-Powered Utility Metering with LCD, Consumer Remote Control Units, Low-End Medical Monitoring Devices, IoT Sensor Nodes, White-Goods User Interfaces, Automotive Interior Accessories.
Battery-Powered Utility Metering with LCD
The PIC16LF1902-E/SS fits battery-powered utility metering because it integrates a segmented LCD driver supporting up to 72 segments (4 common + 18 segment pins), a 10-bit ADC with internal voltage reference, and nanoWatt XLP sleep currents below 1 µA, per Microchip datasheet DS40001455F. The 1.8-3.6 V VDD range accepts single-cell Li-ion or 3.6 V lithium thionyl chloride primary cells directly without boost circuitry. The MCU digitizes pulse outputs from flow sensors or hall-effect meter transducers, drives the glass LCD for kWh or m³ display, and stays in sleep for the vast majority of the time to achieve 10+ year battery life on a single cell.
Được đề xuất
Consumer Remote Control Units
The PIC16LF1902-E/SS suits universal remote controls because of its 20 MHz enhanced mid-range core (5 MIPS) for IR protocol generation, integrated EUSART for future wireless modules, and 25 mA I/O source/sink that can directly drive IR LEDs without external transistors. The 3.5 KB Flash accommodates RC5, RC6, NEC, SIRC, and proprietary IR protocols while the 21 I/O pins leave headroom for a keypad matrix and status LEDs. nanoWatt XLP technology keeps standby current below 1 µA so a remote can sit on a shelf for a year without battery replacement.
Được đề xuất
Low-End Medical Monitoring Devices
The PIC16LF1902-E/SS is appropriate for low-end medical monitoring such as digital thermometers, pulse oximeter front-ends, and pill-bottle reminders, due to its deterministic 8-bit core, integrated 10-bit ADC for sensor digitization, and BOR/POR ensuring clean startup. The -40 to +125 C extended temperature grade covers skin-contact thermistor interfaces and body-worn designs. With deterministic interrupt latency the MCU can service sensor I/O without missing samples, and the LCD driver eliminates a dedicated display chip on the BOM.
Được đề xuất
IoT Sensor Nodes
The PIC16LF1902-E/SS powers battery-backed IoT sensor nodes for building automation, asset tracking, and environmental monitoring. The enhanced mid-range core runs Microchip's eXtreme Low Power (XLP) sleep modes drawing well under 1 µA, waking on timer, ADC threshold, or change-on-pin interrupts. The integrated segmented LCD can show sensor readings locally without a wireless round trip. Combined with sub-GHz transceivers like the MRF89XA or LoRa modules, designers get a multi-year coin-cell node for smart agriculture or HVAC zoning.
Được đề xuất
White-Goods User Interfaces
The PIC16LF1902-E/SS controls user interfaces in washing machines, dishwashers, microwave ovens, and refrigerators thanks to its segmented LCD driver, 11-channel ADC for temperature/level sensing, and PWM-capable timers for motor or buzzer drive. The 1.8-3.6 V supply supports direct 3.3 V operation with simple LDO regulation. EUSART allows connection to main controller boards for status reporting, while the extended -40 to +125 C temperature grade handles the high ambient temperatures near appliance compressors and heater elements.
Được đề xuất
Automotive Interior Accessories
The PIC16LF1902-E/SS (extended -40 to +125 C grade) is well-suited to automotive interior accessories such as seat-heater controls, climate-mode keypads, and ambient lighting controllers. The 25 mA I/O source/sink can drive LED strings or small relays directly. The integrated EUSART interfaces with the vehicle CAN/LIN gateway chip for status reporting, while BOR and the on-board watchdog keep the firmware responsive on noisy 12 V automotive rails. Designers must follow Microchip's AEC-Q100 grade-selection matrix to choose the correct -E variant for the in-cabin thermal envelope.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF1902-E/SS — 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 | PIC16LF1902-I/SS | PIC16LF1902T-I/SS | PIC16LF1903-I/SS |
|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) |
| Brand | Microchip Technology | Microchip Technology (same) | Microchip Technology (same) | Microchip Technology (same) |
| Program Memory (Flash) | 3.5 KB (2K x 14) | 3.5 KB (same) | 3.5 KB (same) | 7 KB (+100%) |
| Data SRAM | 128 B | 128 B (same) | 128 B (same) | 256 B (+100%) |
| Maximum CPU Frequency | 20 MHz | 20 MHz (same) | 20 MHz (same) | 20 MHz (same) |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V (same) | 1.8 V to 3.6 V (same) | 1.8 V to 3.6 V (same) |
| Operating Temperature | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +85C (I grade, T&R) | -40C to +85C (I grade) |
| LCD Segments | Up to 72 | Up to 72 (same) | Up to 72 (same) | Up to 96 |
| ADC | 10-bit, 11 channels | 10-bit, 11 channels (same) | 10-bit, 11 channels (same) | 10-bit, 17 channels |
Bảo phân biệt quan trọng
- Extended -40 to +125 C automotive temperature grade (vsPIC16LF1902-I/SS)
- Doubling of Flash and SRAM vs PIC16LF1902 (vsPIC16LF1903-I/SS)
- SSOP-28 surface-mount versus PDIP-28 through-hole (vsPIC16LF1902-E/SP)
Ghi chú thiết kế
Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 1 or 28) with a short trace to VSS (pin 14 or 27). For battery applications, add a 10 µF bulk capacitor near the IC to handle the LCD charge-pump inrush current spikes that occur every LCD refresh period (typically 60 Hz to 200 Hz).
Keep the analog AVSS/AVDD traces short and isolated from switching digital traces if you are using the ADC in high-impedance sensor applications. The SSOP-28 footprint allows routing the LCD segment lines on the outer layers without crossing the analog input cluster. Use a ground pour under the IC to improve thermal dissipation and EMI.
Do not leave the MCLR/RA3 pin floating - it functions as the device reset when configured as MCLR and a floating pin can cause spurious resets or failure to enter debug mode. Tie MCLR to VDD through a 10 kΩ resistor or directly to VDD if no external reset is required. Also ensure VDD rises monotonically above the BOR threshold on power-up to guarantee correct initialization.
The ICSPDAT/ICSPCLK pins (RA0/RA1) must be accessible for in-circuit serial programming. Either dedicate them to programming only or share them with low-frequency peripherals so the programmer does not conflict with application code. Place a 4.7 kΩ pull-up on ICSPCLK and a series resistor on ICSPDAT if the pins are shared with LEDs or other loads.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. The -E suffix indicates extended temperature grade (-40 to +125 C) but does NOT by itself qualify the part to AEC-Q100; consult Microchip's automotive-grade part list for AEC-Q100-qualified equivalents if automotive certification is required.
