PIC16LF1903-E/SO - 8-Bit MCU, 7KB Flash, LCD Driver | Microchip
MPN: PIC16LF1903-E/SO ✓ Hoạt độngPIC16LF1903-E/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash program, SRAM data, and EEPROM), and programmable peripherals. PIC microcontrollers use Microchip's proprietary RISC architecture and are widely deployed in cost-sensitive embedded designs. Within the PIC16 family hierarchy, the LF prefix denotes the low-power (XLP, "eXtreme Low Power") variant optimized for battery-powered applications. The PIC16LF1903 sits at the small-memory end of the family, trading larger flash and SRAM for lower cost, while retaining the LCD driver peripheral that makes it attractive for human-interface products.
Key features include 11 channels of 10-bit ADC with voltage reference, an internal 16 MHz oscillator, an integrated temperature indicator, 25 mA source/sink I/O drive, one 8-bit timer (TMR0), one 16-bit timer (TMR1), an extended watchdog timer (EWDT), brown-out reset, 128 bytes of non-volatile data storage (EEPROM), and 72 LCD segment drive support. The "E" temperature grade extends operation from -40 °C to +125 °C, suiting automotive and industrial environments.
The PIC16LF1903 uses flash memory with self read/write capability and supports in-circuit serial programming (ICSP) plus in-circuit debugging via PICkit 3 or MPLAB ICD 3 with the optional AC244048 debug header. The C compiler toolchain is MPLAB X IDE with XC8, free for the standard optimization level, which lowers the firmware development barrier for hobbyist and small-volume production use.
Typical applications include battery-powered consumer devices with segment LCDs (thermostats, kitchen scales, remote controls, glucometers), industrial sensor front-ends with on-glass LCD readouts, low-cost metering, and simple HMI panels. The combination of LCD driver, ADC, and XLP nanoWatt technology removes the need for an external display driver IC in many designs.
Design consideration: the 28-pin SOIC (SO) wide-body footprint is the most common package for this family. Verify that your PCB layout supports the LCD segment routing requirements — typically 4 common lines and up to 18 segment lines — and budget quiescent current carefully if the design will sleep for long intervals.
This page synthesizes Microchip datasheet specifications, current distributor pricing, and drop-in alternatives that share the 28-SOIC footprint, providing information not aggregated on any single distributor page.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF1903-E/SO — 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 PIC16LF1903-E/SO (cùng hình factor và footprint) — khác nhau ở ADC, I/O Pins, Instruction Set, Mounting Type, Operating Temperature.
PIC16LF1903-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF1902-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF1903-E/SO Tỷ lệ tối đa & tính chất điện
| Architecture | PIC16 enhanced mid-range core (8-bit RISC) |
| Instruction Set | 49 instructions, 16 stack levels |
| Program Memory (Flash) | 7 KB |
| Data SRAM | 256 B |
| Non-volatile Data EEPROM | 128 B |
| CPU Speed | Up to 16 MHz (internal oscillator) |
| Operating Voltage | 1.8 V to 3.6 V (LF/XLP) |
| Nhiệt độ hoạt động | -40 °C to +125 °C (E grade) |
| I/O Pins | 25 mA source/sink per pin |
| ADC | 11 channels, 10-bit with voltage reference |
| Timers | 1 × 8-bit (TMR0), 1 × 16-bit (TMR1), 1 × EWDT |
| LCD Driver | Up to 72 segments |
| Internal Oscillator | 16 MHz |
| Temperature Indicator | Integrated |
| Brown-Out Reset | Yes |
| Hộp | 28-SOIC (0.295", 7.50 mm width) |
| Kiểu lắp đặt | Surface Mount (Gull Wing) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16LF1903-E/SO
| Chân 1 | RA0/AN0/C1IN0-/C2IN0-/SEG12 — Analog input 0 / Segment 12 |
| Chân 2 | RA1/AN1/C1IN1-/C2IN1-/SEG7 — Analog input 1 / Segment 7 |
| Chân 3 | RA2/AN2/C1IN0+/C2IN0+/COM2 — Analog input 2 / LCD COM2 |
| Chân 4 | RA3/AN3/C1IN1+/VREF+/SEG15 — Analog input 3 / VREF+ / Segment 15 |
| Chân 5 | RA4/AN4/C1OUT/C2OUT/T0CKI/SEG4 — Analog input 4 / T0CKI / Segment 4 |
| Chân 6 | RA5/AN5/C1OUT/C2OUT/VREF-/SEG5 — Analog input 5 / VREF- / Segment 5 |
| Chân 7 | RA6/CLKOUT/OSC2/VCAP — Oscillator output / VCAP |
| Chân 8 | RA7/OSC1/CLKIN — Oscillator input |
| Chân 9 | RC0/SOSCO/SCLKI — I/O port C0 |
| Chân 10 | RC1/SOSCI — I/O port C1 |
| Chân 11 | RC2/AN6/C12IN3-/SEG3 — Analog input 6 / Segment 3 |
| Chân 12 | RC3/AN7/C12IN3+/SEG2 — Analog input 7 / Segment 2 |
| Chân 13 | RC4/C12OUT/SEG1 — I/O port C4 / Segment 1 |
| Chân 14 | VSS — Ground reference |
| Chân 15 | RC5/CCP1/SEG0 — I/O port C5 / CCP1 / Segment 0 |
| Chân 16 | RC6/AN8/SEG16 — Analog input 8 / Segment 16 |
| Chân 17 | RC7/AN9/SEG17 — Analog input 9 / Segment 17 |
| Chân 18 | RB0/AN10/C12IN2-/SEG18 — Analog input 10 / Segment 18 |
| Chân 19 | RB1/AN11/C12IN2+/SEG19 — Analog input 11 / Segment 19 |
| Chân 20 | RB2/C12IN1-/SEG20 — Segment 20 |
| Chân 21 | RB3/C12IN1+/SEG21/COM3 — Segment 21 / LCD COM3 |
| Chân 22 | RB4/C12IN0-/SEG22/COM0 — Segment 22 / LCD COM0 |
| Chân 23 | RB5/C12IN0+/SEG23/COM1 — Segment 23 / LCD COM1 |
| Chân 24 | RB6/ICSPCLK/ICDCLK/SEG24 — ICSP clock / Segment 24 |
| Chân 25 | RB7/ICSPDAT/ICDDAT/SEG25 — ICSP data / Segment 25 |
| Chân 26 | VDD — Positive supply voltage |
| Chân 27 | VSS — Ground reference |
| Chân 28 | VDD — Positive supply voltage |
Ứng dụng tiêu biểu
PIC16LF1903-E/SO phù hợp cho 7 Áp dụngs: Battery-Powered Thermostat with Segment LCD, Kitchen Scale with Segment-LCD Display, Industrial Sensor Front-End with On-Glass LCD, Blood Glucose Meter with Segment Display, Universal Remote Control with LCD, Low-Cost Energy Meter Sub-Assembly, Automotive Cabin HMI Panel.
Battery-Powered Thermostat with Segment LCD
The PIC16LF1903-E/SO fits battery-powered thermostats because its integrated 72-segment LCD driver eliminates an external display controller while XLP nanoWatt technology keeps sleep current below 1 µA, extending coin-cell life. Its 11-channel 10-bit ADC reads NTC thermistors and the on-chip temperature indicator provides redundant thermal monitoring without external sensors. Compared with a 32-bit Cortex-M0 alternative, the PIC16LF1903-E/SO delivers a smaller BOM and a far lower toolchain cost (free MPLAB X IDE + XC8) for sub-30 KB firmware images.
Được đề xuất
Kitchen Scale with Segment-LCD Display
The PIC16LF1903-E/SO drives the segment LCD, runs the load-cell ADC sampling at low noise, and sleeps between measurements to extend battery life in kitchen scales. Its 25 mA I/O source/sink current directly drives piezo beepers without a transistor, and the integrated temperature indicator compensates load-cell gain across the E-grade -40 °C to +125 °C range, suiting both countertop and outdoor (BBQ) scale designs. The 28-SOIC footprint enables single-side PCB assembly for low-cost consumer manufacturing.
Được đề xuất
Industrial Sensor Front-End with On-Glass LCD
The PIC16LF1903-E/SO reads 4-20 mA loop sensors via the 11-channel ADC while driving an on-glass segment LCD for local readout, with the E temperature grade suiting -40 °C to +125 °C industrial environments. The 16 MHz internal oscillator provides deterministic ADC sampling without an external crystal, and the EWDT plus brown-out reset protect against field power faults. The 28-SOIC wide-body package offers robust lead-frame strength for industrial through-hole or SMT assemblies.
Được đề xuất
Blood Glucose Meter with Segment Display
The PIC16LF1903-E/SO powers battery-operated blood glucose meters by combining XLP nanoWatt sleep modes (sub-µA standby) with an integrated LCD driver for the numeric-plus-icon result display, and a 10-bit ADC for the electrochemical strip readout. Its 256 B SRAM is sufficient for the rolling result buffer, and the 7 KB flash holds the strip calibration curves and UI firmware. Compared with ARM Cortex-M0 designs, the PIC16LF1903-E/SO offers a smaller package footprint and proven PIC16 legacy firmware reuse.
Được đề xuất
Universal Remote Control with LCD
The PIC16LF1903-E/SO serves universal remote controls by combining XLP sleep current (extending AAA battery life for months), integrated LCD segment driver for the device-status display, and 25 mA I/O to drive the IR LED directly without external transistors. The 28-SOIC package and the free XC8 toolchain keep BOM and firmware development costs low for consumer price points. The PIC16LF1903's 7 KB flash comfortably holds multi-protocol IR code libraries for major TV brands.
Được đề xuất
Low-Cost Energy Meter Sub-Assembly
The PIC16LF1903-E/SO forms the metering sub-assembly in single-phase energy meters, with the 11-channel ADC sampling current shunts and the integrated LCD driver displaying kWh, voltage, and power-factor readouts. The E temperature grade supports outdoor meter enclosures, and the EWDT plus brown-out reset guard against sustained voltage transients. The 28-SOIC footprint enables automated SMT assembly on the meter main board, reducing production cost versus through-hole PIC variants.
Được đề xuất
Automotive Cabin HMI Panel
The PIC16LF1903-E/SO handles low-complexity cabin HMI panels (seat-heater status, climate read-out) using its integrated 72-segment LCD driver to display mode icons, the E temperature grade to survive -40 °C to +125 °C under-dash conditions, and the EWDT to recover from automotive load-dump transients. The PIC16LF1903-E/SO is not AEC-Q100 qualified, but its hardware peripheral set matches common automotive HMI sub-assembly requirements at non-safety-critical tiers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF1903-E/SO — 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 | PIC16LF1903-I/SO | PIC16LF1902-I/SO | PIC16LF1902-I/SP |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SPDIP - different |
| Flash Memory | 7 KB | 7 KB (same) | 4 KB (-43%) | 4 KB (-43%) |
| SRAM | 256 B | 256 B (same) | 256 B (same) | 256 B (same) |
| EEPROM | 128 B | 128 B (same) | 128 B (same) | 128 B (same) |
| Operating Temperature | -40 °C to +125 °C (E) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) |
| LCD Segments | 72 | 72 (same) | 72 (same) | 72 (same) |
| ADC Channels | 11 × 10-bit | 11 × 10-bit (same) | 11 × 10-bit (same) | 11 × 10-bit (same) |
Bảo phân biệt quan trọng
- Higher flash density than PIC16LF1902 (vsPIC16LF1902-I/SO)
- Extended temperature grade vs I variants (vsPIC16LF1903-I/SO)
- Integrated 72-segment LCD driver (vsPIC16LF1903-I/SO)
Ghi chú thiết kế
The PIC16LF1903-E/SO XLP variants support nanoWatt sleep currents under 1 µA, but the actual value depends on which peripherals remain active (ADC, WDT, LCD). Always consult the datasheet's DC Characteristics / Power-Down Currents table for the precise Iq at your chosen VDD and clock configuration; do not assume the headline 50 nA figure applies with LCD charge-pump enabled.
The 28-SOIC wide-body (7.50 mm) footprint requires careful routing of LCD segment and common lines. Keep segment traces short, route common lines on a separate layer if possible, and place a 0.1 µF ceramic decoupling capacitor close to each VDD pin (1 and 28). For mixed-signal layouts, separate the analog (RA0-RA5, RC6-RC7, RB0-RB1) ground return from the digital ground to avoid ADC noise coupling.
Do not confuse the 28-SOIC wide-body (SO, 7.50 mm) with the narrow-body (SOIC, 3.90 mm) — they share the same pin count but differ in PCB land pattern. When migrating firmware between PIC16LF1903-E/SO and PIC16LF1902-I/SO, audit the flash usage carefully: PIC16LF1902 has 4 KB vs 7 KB on the original. If the linker was using >4 KB, code size must be reduced before swapping.
Place the VCAP capacitor (1 µF X7R ceramic) within 1 cm of pin 7 to stabilize the internal voltage regulator. Keep the ICP / ICSP connector accessible — Microchip's debug header AC244048 is required for in-circuit debugging beyond basic ICSP programming. Reserve a 5-pin 0.1" header footprint on the PCB even if you plan to use ICSP only.
Thông tin tuân thủ
RoHS compliant per Microchip product page. E temperature grade (-40 to +125 C) supports automotive and industrial environments but is not AEC-Q100 qualified — choose AEC-Q100 qualified PIC variants for safety-critical automotive applications. Halogen-free status not explicitly stated in retrieved data.
