PIC16LF18346T-I/SO - 32MHz 8-bit XLP MCU 28KB Flash SOIC-20
MPN： PIC16LF18346T-I/SO ✓ 啟用中PIC16LF18346T-I/SO 概覽
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data bus, optimized for cost-sensitive embedded control where deterministic GPIO toggling and ultra-low sleep current matter more than raw compute throughput. Within the broader taxonomy, PIC MCUs belong to the microcontroller category, which sits between general-purpose microprocessors and application-specific SoCs; the PIC16F sub-family uses a 14-bit instruction word and is one of the most widely deployed 8-bit cores in industrial, consumer, and IoT products.
Key features that distinguish this part include Peripheral Pin Select (PPS), which allows remapping of digital peripherals to any I/O pin for layout flexibility; eXtreme Low Power (XLP) with sleep currents below 1 uA typical; and functional safety (FuSa) support for safety-critical designs. The 256-byte EEPROM supports non-volatile user data storage without wearing the Flash array.
The architecture combines a Harvard RISC core with on-chip debug, a configurable logic cell (CLC) for hardware glue logic, complementary waveform generator (CWG), and numerically controlled oscillator (NCO) blocks. PPS, CIPs, and XLP together minimize external component count and extend battery life.
Typical applications include battery-powered IoT sensor nodes, consumer remote controls, low-end home appliances, industrial sensor conditioning, and portable medical peripherals. The wide 1.8V-3.6V operating range allows direct connection to single-cell Li-ion or two AA cells without additional regulation.
When designing with this device, allocate one I/O for the MCLR reset function unless the internal weak pull-up is enabled via configuration bits. Use PPS early in the schematic capture to avoid layout rework when assigning peripheral functions to physical pins.
This page synthesizes distributor pricing, tape-and-reel packaging details, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 PIC16LF18346T-I/SO — 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： PIC16LF18346T-I/SO （相同外形與佔位） — 差異在於 Core Architecture, Package, ADC, Family, MSL Level.
PIC16LF18346-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16F18346T-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF18326T-I/SO
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16LF18345T-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF18346T-I/SO 最大額定值與電氣特性
| Core Architecture | PIC16 8-bit RISC |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data RAM | 2 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| 工作溫度 | -40C to +85C (Industrial) |
| ADC | 10-bit |
| SPI | 2x |
| I2C | 2x |
| 封裝 | 20-SOIC (7.50 mm width) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 1 (unlimited floor life) |
| RoHS 狀態 | Compliant |
| Low-Power Technology | XLP (eXtreme Low Power) |
| Core Independent Peripherals | CLC, CWG, CCP, PWM, NCO |
| Peripheral Pin Select (PPS) | Yes |
PIC16LF18346T-I/SO 腳位配置
| 腳位 1 | VDD — Positive supply voltage (1.8V-3.6V) |
| 腳位 2 | RA5 — Bidirectional I/O / analog input |
| 腳位 3 | RA4 — Bidirectional I/O / analog input |
| 腳位 4 | RA3 — Bidirectional I/O / MCLR input (per configuration) |
| 腳位 5 | RA2 — Bidirectional I/O / analog input |
| 腳位 6 | RA1 — Bidirectional I/O / analog input |
| 腳位 7 | RA0 — Bidirectional I/O / analog input |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | RA7 — Bidirectional I/O / oscillator |
| 腳位 10 | RA6 — Bidirectional I/O / oscillator |
| 腳位 11 | RC5 — Bidirectional I/O / PPS remappable |
| 腳位 12 | RC4 — Bidirectional I/O / PPS remappable |
| 腳位 13 | RC3 — Bidirectional I/O / PPS remappable |
| 腳位 14 | RC2 — Bidirectional I/O / PPS remappable |
| 腳位 15 | RC1 — Bidirectional I/O / ICSPCLK |
| 腳位 16 | RC0 — Bidirectional I/O / ICSPDAT |
| 腳位 17 | RB7 — Bidirectional I/O / PPS remappable |
| 腳位 18 | RB6 — Bidirectional I/O / PPS remappable |
| 腳位 19 | RB5 — Bidirectional I/O / PPS remappable |
| 腳位 20 | RB4 — Bidirectional I/O / PPS remappable |
典型應用
PIC16LF18346T-I/SO 適用於 7 應用s: Battery-Powered IoT Sensor Node, Consumer Remote Control, Low-End Home Appliance Control, Industrial Sensor Conditioning, Portable Medical Peripheral, Automotive Body Electronics, Smart Home Wireless Node.
Battery-Powered IoT Sensor Node
The PIC16LF18346T-I/SO fits battery-powered IoT sensor nodes because its eXtreme Low Power (XLP) technology delivers sleep currents below 1 uA typical and its 1.8V-3.6V supply range accepts two AA alkaline cells or a single Li-ion cell directly without an external LDO. The 28KB Flash accommodates BLE/Zigbee stack fragments and sensor-fusion code; the integrated 10-bit ADC reads temperature, humidity, or gas sensors; and the two I2C/SPI peripherals interface with environmental sensors and a radio module. PPS lets the designer remap peripheral pins late in the schematic phase, reducing PCB rework when the RF section layout changes. Compared with a Cortex-M0+ solution, this part delivers lower sleep current and a simpler BOM at the cost of compute throughput.
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Consumer Remote Control
The PIC16LF18346T-I/SO suits consumer remote controls thanks to its low active current (sub-mA/MHz typical) and deep sleep modes that allow coin-cell battery life to extend beyond one year. The 10-bit ADC reads IR-photodiode signals for learning-mode remotes; PWM drives an IR LED at 38 kHz carrier; and CWG generates complementary IR drive waveforms without CPU involvement. The 256-byte EEPROM stores learned IR codes without wearing Flash. Pin-compatibility with the smaller PIC16LF18326T-I/SO gives designers a cost-down path for simplified remotes needing only 16KB Flash.
推薦
Low-End Home Appliance Control
In low-end home appliances such as small kitchen blenders, air purifiers, and rice cookers, the PIC16LF18346T-I/SO provides deterministic GPIO control for relays, TRIACs, and segment displays while its integrated peripherals (CLC, CWG, PWM) replace external logic and timer ICs. The 20-SOIC package is hand-solderable for prototyping and supports wave soldering for high-volume assembly. The 256-byte EEPROM stores user preferences such as favorite cooking programs or filter-life counters, surviving power cycles without Flash wear. Industrial -40C to +85C temperature tolerance covers unheated cabinet environments.
推薦
Industrial Sensor Conditioning
The PIC16LF18346T-I/SO is well suited to industrial sensor conditioning front-ends where it digitizes a 4-20 mA or 0-10 V transducer output via its 10-bit ADC, applies linearization in firmware, and transmits the result over RS-485 or I2C to a controller. Its CWG and CLC blocks implement hardware PWM excitation for RTD bridge sensors, reducing firmware load. The 1.8V-3.6V supply allows operation directly from a 3.3V regulated rail common in industrial PLCs. PPS simplifies routing when the 4-20 mA loop interface is placed at the far edge of the PCB away from digital I/O.
推薦
Portable Medical Peripheral
For portable medical peripherals such as pulse oximeters, single-parameter patient monitors, and electronic thermometers, the PIC16LF18346T-I/SO combines low-power operation, deterministic real-time response, and a small 20-SOIC footprint. The 10-bit ADC reads photoplethysmography (PPG) signals from a red/IR LED finger probe; PWM drives the LED at controlled duty cycles to limit average current; and the two I2C peripherals interface with a small OLED display and an EEPROM patient log. XLP sleep extends battery life between measurements; the LF variant's 1.8V minimum supports direct operation from a coin-cell backup.
推薦
Automotive Body Electronics
In automotive body electronics applications such as interior lighting controllers, seat-position memory modules, and HVAC flap actuators, the PIC16LF18346T-I/SO with its AEC-Q100 capable family member provides robust performance across -40C to +125C. The 20-SOIC package is suitable for under-dash mounting where 5V supply is available; PPS remaps SPI to interface with LIN or CAN transceivers via software-configurable pins. The 28KB Flash supports CAN/LIN stack fragments and state-machine logic for position memory. Note that the automotive-grade AEC-Q100 qualified version is PIC16F18346T-I/SO (F variant, not LF), as confirmed by the DigiKey product listing for the FuSa variant.
推薦
Smart Home Wireless Node
The PIC16LF18346T-I/SO serves as the host MCU for smart home wireless nodes such as battery-powered door/window sensors, leak detectors, and occupancy sensors. Its sleep current below 1 uA and Cortex-class deep-sleep wake sources enable multi-year battery life on a single CR2032 cell. The two I2C peripherals connect to a low-power sub-GHz or BLE radio module and a sensor; the 10-bit ADC reads battery voltage and analog sensors; and the 256-byte EEPROM stores network keys and calibration constants. PPS lets the designer keep the radio and sensor on opposite sides of the PCB for optimal antenna placement without firmware changes.
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推薦產品摘要
工程參考資料，適用於 PIC16LF18346T-I/SO — 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 | PIC16LF18346-I/SO | PIC16F18346T-I/SO | PIC16LF18326T-I/SO | PIC16LF18345T-I/SO |
|---|---|---|---|---|---|
| Package | 20-SOIC | 20-SOIC (same) | 20-SOIC (same) | 20-SOIC (same) | 20-SOIC (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 28 KB | 28 KB | 28 KB | 16 KB | 14 KB |
| RAM | 2 KB | 2 KB | 2 KB | 1 KB | 1 KB |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| XLP / Low Power | Yes | Yes | Yes | Yes | Yes |
| Automotive Grade | Industrial (-40C to +85C) | Industrial | AEC-Q100 capable (FuSa variant) | Industrial | Industrial |
主要差異化特點
- Highest Flash density in 20-SOIC PIC16 family (對比PIC16LF18326T-I/SO)
- Wide low-voltage range with LF designator (對比PIC16F18346T-I/SO)
- Twice the RAM of smaller siblings (對比PIC16LF18345T-I/SO)
- Integrated CIPs reduce external component count (對比PIC16LF18326T-I/SO)
設計說明
Estimated: At VDD=3.3V and active current of about 5 mA at 32 MHz, the MCU dissipates roughly 16.5 mW. In Sleep mode with XLP, current drops below 1 uA, so battery life for an IoT sensor waking every 10 seconds is dominated by sleep current: a CR2032 (220 mAh) provides theoretical life exceeding 25 years if wake cycles are kept short (<5 ms). Place a 100 nF ceramic decoupling capacitor within 5 mm of VDD (pin 1) and a 10 uF bulk capacitor at the board power entry to handle inrush during radio transmission events.
Do not assume the PIC16LF18346T-I/SO can be programmed with a 5V programmer - it operates at 1.8V-3.6V and the ICSP pins are not 5V tolerant. Use Microchip's MPLAB PICkit 4 or MPLAB ICD 4 in 3.3V mode. Configuration bits must be set explicitly: if MCLR is disabled, an external reset supervisor (such as MCP130) is recommended for safety-critical applications to ensure deterministic startup under brown-out conditions.
Keep the SOIC-20 footprint on a 1.27 mm pitch standard land pattern with at least 0.2 mm annular ring for wave-solder compatibility. Place the decoupling capacitor (100 nF X7R) directly under or beside pin 1 with traces shorter than 3 mm to minimize VDD ripple during CWG/PWM switching events. Route the ICSP signals (RC0/RC1) to a 6-pin header with dedicated test points; do not share these pins with high-current loads because in-circuit programming requires bus isolation.
Take advantage of Peripheral Pin Select (PPS) to free up board space: route SPI to RB4-RB7 and I2C to RC3-RC5 even if the datasheet default mapping places these on different pins. This eliminates 2-3 layer crossings on space-constrained 2-layer boards. Always check the latest PPS Unlock Sequence in the device Family Programming Specification before locking the configuration bits, because locked PPS requires a full Bulk Erase to reprogram.
合規資訊
RoHS and lead-free compliant per Microchip product page. The standard PIC16LF18346T-I/SO is industrial grade (-40C to +85C). For AEC-Q100 automotive qualification, choose PIC16F18346T-I/SO (the F variant with FuSa / automotive qualification).
