PIC16LF1902T-I/MV - 8-Bit 20MHz MCU 3.5KB Flash | Microchip
MPN： PIC16LF1902T-I/MV ✓ 啟用中PIC16LF1902T-I/MV 概覽
An 8-bit microcontroller (MCU) is a small computer-on-a-chip built around an 8-bit data bus and a RISC or CISC core. The PIC16LF1902 uses Microchip's enhanced mid-range 8-bit core with 49 instructions and 16-level stack, executing one instruction per clock cycle (except branches). MCUs sit at the lowest tier of the embedded hierarchy: bare die -> packaged IC -> MCU module -> embedded system -> IoT/edge device. The 'LF' prefix denotes an extended-voltage 1.8V-3.6V part optimised for battery applications, where XLP (eXtreme Low Power) achieves sub-uA sleep currents measured in nanoamperes.
Key features include 3.5KB (2K x 14 words) of self-read/write Flash, 128 bytes SRAM, 11-channel 10-bit ADC with internal voltage reference, integrated temperature indicator, support for up to 72 LCD segment drives, internal 16 MHz oscillator, two timers (8-bit TMR0 and 16-bit TMR1), extended watchdog timer, brown-out reset, and 25 mA source/sink I/O for direct LED drive. In-Circuit Serial Programming (ICSP) is supported via PICkit 3 and MPLAB ICD 3.
The PIC16LF1902 is built on a CMOS process with nanoWatt XLP technology that achieves typical sleep currents below 1 uA with full RAM retention and wake-up on interrupt. Internal oscillator trimming eliminates external crystals in cost-sensitive designs, while the integrated LCD driver removes the need for an external charge-pump or segment driver chip.
Typical applications include low-power LCD-based consumer products such as thermostats, blood-pressure monitors, remote controls, electronic shelf labels, battery-powered sensor nodes, and metering displays. The 72-segment LCD support is sufficient for 8-character alphanumeric plus icon displays.
When designing with this part, observe the absolute maximum VDD of 3.6V for the LF variant and reserve a 4x4 mm PCB land pattern for the UQFN (MV) package. The '-T' suffix indicates tape-and-reel packaging (3000-piece reel).
This page synthesises Microchip datasheet specifications, DigiKey distributor pricing as of 2026-09-24, drop-in UQFN-28 alternatives, and practical design notes not collected in any single distributor listing.
直接替換替代品，適用於 PIC16LF1902T-I/MV — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16LF1902T-I/MV （相同外形與佔位） — 差異在於 Package, ADC, Timers, Operating Temperature, Program Memory (Flash).
PIC16LF1903T-I/MV
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16LF1902-I/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF1789-I/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF1784-I/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF1826-E/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF18854-E/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF1902T-I/MV 最大額定值與電氣特性
| Core Architecture | Enhanced Mid-range 8-bit PIC |
| Instruction Set | 49 instructions, 16-level stack |
| 最大時脈頻率 | 20 MHz |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| Data RAM | 128 bytes |
| Supply Voltage (VDD) | 1.8 V to 3.6 V (LF variant) |
| ADC | 11-channel, 10-bit with internal voltage reference |
| LCD Driver | Up to 72 segments |
| Timers | 1x 8-bit (TMR0), 1x 16-bit (TMR1) |
| Internal Oscillator | 16 MHz |
| I/O Source / Sink Current | 25 mA per pin |
| 工作溫度 | -40 C to +85 C (industrial, '-I' suffix) |
| 封裝 | 28-pin UQFN 4x4 mm (MV) |
| 安裝類型 | Surface Mount |
| Low-Power Technology | nanoWatt XLP |
| Programming / Debug | ICSP via PICkit 3, MPLAB ICD 3 |
PIC16LF1902T-I/MV 腳位配置
| 腳位 1 | RA0 — Bidirectional I/O / LCD segment |
| 腳位 2 | RA1 — Bidirectional I/O / LCD segment |
| 腳位 3 | RA2 — Bidirectional I/O / LCD segment |
| 腳位 4 | RA3 — Bidirectional I/O / LCD segment / MCLR |
| 腳位 5 | RA4 — Bidirectional I/O / LCD segment |
| 腳位 6 | RA5 — Bidirectional I/O / LCD segment |
| 腳位 7 | RA6 — Bidirectional I/O / OSC2 / CLKOUT |
| 腳位 8 | RA7 — Bidirectional I/O / OSC1 / CLKIN |
| 腳位 9 | VSS — Ground reference |
| 腳位 10 | RC0 — Bidirectional I/O / LCD segment |
| 腳位 11 | RC1 — Bidirectional I/O / LCD segment |
| 腳位 12 | RC2 — Bidirectional I/O / LCD segment |
| 腳位 13 | RC3 — Bidirectional I/O / LCD segment |
| 腳位 14 | RC4 — Bidirectional I/O / LCD segment |
| 腳位 15 | RC5 — Bidirectional I/O / LCD segment |
| 腳位 16 | RC6 — Bidirectional I/O / TX/CK / ICDCLK |
| 腳位 17 | RC7 — Bidirectional I/O / RX/DT / ICDDAT |
| 腳位 18 | VSS — Ground reference (second pad) |
| 腳位 19 | VDD — Positive supply (1.8 V - 3.6 V) |
| 腳位 20 | VDD — Positive supply (second pad) |
| 腳位 21 | RB4 — Bidirectional I/O / LCD segment |
| 腳位 22 | RB5 — Bidirectional I/O / LCD segment |
| 腳位 23 | RB6 — Bidirectional I/O / ICSPCLK / LCD segment |
| 腳位 24 | RB7 — Bidirectional I/O / ICSPDAT / LCD segment |
| 腳位 25 | RB0 — Bidirectional I/O / INT / LCD segment |
| 腳位 26 | RB1 — Bidirectional I/O / LCD segment |
| 腳位 27 | RB2 — Bidirectional I/O / LCD segment |
| 腳位 28 | RB3 — Bidirectional I/O / LCD segment |
典型應用
PIC16LF1902T-I/MV 適用於 7 應用s: Battery-Powered LCD Thermostat, Electronic Shelf Label (ESL), Blood-Pressure / Health Monitor, Remote Control with LCD Status Bar, Battery-Powered IoT Sensor Node, Industrial Metering Display, Consumer Appliance User Interface.
Battery-Powered LCD Thermostat
The PIC16LF1902T-I/MV's integrated 72-segment LCD driver and nanoWatt XLP sleep current below 1 uA make it ideal for wall-mounted battery thermostats running from two AA cells for over five years. The 11-channel 10-bit ADC samples NTC thermistor and onboard temperature-indicator channels with internal voltage reference, eliminating an external temp sensor. Operating from 1.8 V to 3.6 V, the part runs directly from a 2x AA alkaline stack with no LDO. The 28-pin UQFN 4x4 mm package fits behind a 4-digit 7-segment LCD. Combined with the 16 MHz internal oscillator (no external crystal) and ICSP debug, this is the most integrated sub-$1 thermostat MCU on the market.
推薦
Electronic Shelf Label (ESL)
Electronic shelf labels require a sub-1 uA sleep current, an LCD driver, and wireless-friendly wake cycles - exactly the use case the PIC16LF1902T-I/MV targets. The integrated 72-segment LCD driver drives 4-digit numeric plus barcode displays with no external charge-pump. nanoWatt XLP deep-sleep with RTCC wake at 1 Hz drops average current below 20 uA, supporting 5+ year battery life on a CR2032 cell. The 8-bit core and 128 B RAM are sufficient to hold segment-maps and protocol state, while the 25 mA I/O source/sink directly drives the LCD backplane and an RF wake-up interrupt pin. The 4x4 mm UQFN fits inside the ESL housing.
推薦
Blood-Pressure / Health Monitor
Home blood-pressure monitors combine a pump driver, pressure sensor ADC, and an LCD readout - the PIC16LF1902T-I/MV handles all three in one chip. The 11-channel 10-bit ADC with internal voltage reference digitises the pressure transducer and pump-motor current sense, while the 72-segment LCD driver renders systolic/diastolic/pulse values directly to the glass. Battery operation (1.8 V-3.6 V) supports 2x AAA cells with nanoWatt XLP sleep between measurements. The 16 MHz internal oscillator and 8-bit core execute pump-control loops at low latency, and ICSP allows production-line firmware calibration per device. Medical accuracy is achieved via the internal temperature indicator for ADC compensation.
推薦
Remote Control with LCD Status Bar
Universal remote controls benefit from the PIC16LF1902T-I/MV's combination of nanoWatt XLP sleep and integrated LCD for status feedback. The 25 mA I/O source/sink directly drives IR LED transmitter pulses without a discrete MOSFET, while the 11-channel ADC monitors battery voltage. The 72-segment LCD driver powers a small status display showing mode, battery, and clock without an external driver chip. 1.8 V-3.6 V operation supports direct 2x AA cells; nanoWatt XLP keeps standby current below 1 uA so the remote lasts the shelf life of its batteries. The 4x4 mm UQFN fits any handheld form factor.
推薦
Battery-Powered IoT Sensor Node
Wireless sensor nodes for building automation, agriculture, and asset tracking demand multi-year battery life - the PIC16LF1902T-I/MV delivers nanoWatt XLP sleep below 1 uA plus wake-on-interrupt from an external radio. The 11-channel ADC samples analog sensors directly with the internal voltage reference, while 25 mA I/O source/sink drives an LED indicator or piezo buzzer without external transistors. 128 B RAM holds queued measurements and a small MAC state machine. The integrated LCD driver can render sensor values on a 4-digit display, removing the need for an external indicator. 1.8 V-3.6 V operation supports a single CR2032 or 2x AA cells.
推薦
Industrial Metering Display
Industrial water, gas, and electricity meters often use segmented LCDs for tamper-evident displays and must run for 10+ years on a single battery. The PIC16LF1902T-I/MV's integrated 72-segment LCD driver and nanoWatt XLP sleep current below 1 uA are designed for exactly this metering use case. The 10-bit ADC with internal voltage reference measures consumption pulses, while the integrated temperature indicator compensates for thermal drift across -40 C to +85 C. The 1.8 V-3.6 V supply supports a lithium primary cell directly. 3.5 KB Flash holds the metering algorithm, tamper logs, and LCD segment maps; the 28-pin UQFN fits inside the meter enclosure.
推薦
Consumer Appliance User Interface
Small kitchen and personal-care appliances benefit from the PIC16LF1902T-I/MV's integrated LCD, low cost, and capacitive-touch-friendly I/O. The 11-channel ADC supports multiple resistive or capacitive sensor inputs for water level, temperature, or load-cell sensing. The 72-segment LCD driver renders countdown timers, mode indicators, and status icons without a separate driver chip. 25 mA I/O source/sink drives relay coils, buzzers, and triac gates directly, reducing BOM. nanoWatt XLP sleep keeps standby current below 1 uA for Energy Star compliance in always-on appliances. The 4x4 mm UQFN package fits on the smallest UI PCB.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16LF1902T-I/MV — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16LF1903T-I/MV | PIC16LF1902-I/MV | PIC16LF1789-I/MV | PIC16LF1784-I/MV | PIC16LF1826-E/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | UQFN-28 (MV) 4x4 mm | UQFN-28 (MV) 4x4 mm - same | UQFN-28 (MV) 4x4 mm - same | UQFN-28 (MV) 4x4 mm - same | UQFN-28 (MV) 4x4 mm - same | UQFN-28 (MV) 4x4 mm - same |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 32 MHz | 32 MHz | 32 MHz |
| Supply Voltage | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V |
| ADC | 11-ch 10-bit | 11-ch 10-bit | 11-ch 10-bit | Higher-channel 12-bit | Higher-channel 12-bit | mTouch capacitive sensing |
| LCD Driver | Up to 72 segments | Up to 72 segments | Up to 72 segments | None | None | None |
| Low-Power Tech | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | XLP | XLP | XLP |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (E suffix) | -40 C to +125 C (E suffix) | -40 C to +125 C (E suffix) |
主要差異化特點
- Integrated 72-segment LCD driver eliminates external charge-pump IC (對比PIC16LF1789-I/MV)
- Larger Flash allows on-device bootloader and logging (對比PIC16LF1902-I/MV)
- Tape-and-reel packaging for high-volume SMT lines (對比PIC16LF1902-I/MV)
- nanoWatt XLP achieves sub-1 uA sleep with full RAM retention (對比PIC16LF18854-E/MV)
設計說明
The PIC16LF1902T-I/MV requires a decoupling capacitor network on each VDD pin (pin 19 and pin 20) - use 100 nF X7R ceramic as close to the IC as possible, plus a bulk 1 uF/4.7 uF tantalum or ceramic on the supply rail. The nanoWatt XLP sleep current below 1 uA assumes the VDD rail is clean and the MCLR pull-up is below 50 kohm to prevent leakage paths. Do not exceed the absolute maximum of 3.6 V on LF variants - the standard PIC16F1902 must be selected for 5 V designs.
The 28-pin UQFN (MV) package measures 4x4 mm with a centre exposed pad that MUST be soldered to a PCB land of at least 2x2 mm to provide the thermal and electrical ground path. Use NSMD pads with 0.3 mm pitch; via-in-pad is recommended for the centre pad to improve thermal dissipation and reduce ground inductance. The 'T' suffix indicates 3000-piece tape-and-reel packaging compliant with EIA-481.
Place the 32.768 kHz crystal (if used) within 5 mm of the OSC1/OSC2 pins with a guarded ground ring to reduce noise coupling into the LCD segment drivers. The integrated LCD segments share package pins with GPIO, so when designing the PCB layout, route LCD backplane (COM) traces with minimum 0.2 mm spacing and avoid running digital signal traces under the LCD glass footprint. The internal 16 MHz oscillator eliminates an external crystal in most cost-sensitive designs, saving board space.
Estimated: do not use the LF variant on 5 V rails - the LF's 3.6 V absolute maximum will latch-up; select the PIC16F1902 (non-LF) for 5 V systems. The 'T' suffix denotes tape-and-reel - prototype builds should use the '-I/MV' tube/tray variant instead. The MCLR pin (RA3) requires a 10 kohm pull-up to VDD for normal operation; floating MCLR causes intermittent reset. ICD 3 requires the AC244048 external debug header - the older PICkit 2 does not support the enhanced mid-range debug protocol.
合規資訊
RoHS and REACH compliant per Microchip product page. Lead-free NiPdAu finish. AEC-Q100 not applicable for industrial-grade '-I' variant; automotive designs should select the PIC16F1902 AEC-Q100 grade. Halogen-free status not declared on the datasheet cover.
