PIC16LF722AT-I/SS - 8-Bit 20MHz 3.5KB Flash XLP MCU | Microchip
MPN： PIC16LF722AT-I/SS ✓ 啟用中PIC16LF722AT-I/SS 概覽
A microcontroller (MCU) is a single-chip computer containing a processor core, memory, and programmable input/output peripherals. The PIC16LF722A belongs to the 8-bit PIC16 family of microcontrollers, which sit within the broader category of microcontrollers -> embedded processors -> semiconductors. The 'LF' prefix denotes a low-voltage variant optimized for 1.8V-3.6V operation with nanoWatt XLP (eXtreme Low Power) technology, allowing standby currents in the microampere range and active currents in the low milliampere range, which is essential for battery-powered and energy-harvesting designs.
Key features include a high-performance RISC architecture with 49 instructions and a 200 ns instruction cycle, an internal oscillator up to 16 MHz, and 11 ADC channels with 8-bit resolution. The device also offers programmable code protection, a watchdog timer, and brown-out reset for reliable operation in harsh environments. The 28-SSOP (5.30 mm body width) package supports surface-mount assembly and provides 25 I/O pins for flexible peripheral routing.
From an architectural standpoint, the PIC16LF722A uses a Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and operand access. The Flash program memory is self-programmable via the ICSP (In-Circuit Serial Programming) interface, allowing firmware updates in the field. The ADC uses successive approximation with selectable reference voltages, providing flexibility for sensor interface designs.
Typical applications include IoT sensor nodes, battery-powered consumer devices, home automation modules, low-power industrial sensor interfaces, and small appliance controllers. The combination of low power consumption, integrated peripherals, and small form factor also suits remote controls, electronic meters, and wearable health monitoring prototypes.
When designing with this MCU, ensure that VDD remains within 1.8V-3.6V to guarantee ADC accuracy and oscillator stability. Place decoupling capacitors (100 nF and 10 µF) close to the VDD pins to minimize switching noise. The ICSP programming interface pins must be accessible for in-circuit firmware updates during prototyping.
This page synthesizes distributor pricing, drop-in alternatives within the PIC16LF722 family, and practical design considerations that are not consolidated in the manufacturer datasheet. Verified data was sourced from DigiKey, Mouser, Octopart, and Hotenda on 2026-09-25.
直接替換替代品，適用於 PIC16LF722AT-I/SS — 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： PIC16LF722AT-I/SS （相同外形與佔位） — 差異在於 ADC, Package, Operating Temperature, Timers, I/O Pins.
PIC16LF722A-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF720-I/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16LF1938-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF1939-I/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F722A-I/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16LF1902-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF722AT-I/SS 最大額定值與電氣特性
| Core Architecture | PIC16 RISC, 8-bit |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle | 200 ns |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| RAM | 128 bytes |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| ADC | 11 channels, 8-bit |
| Communication Interfaces | I2C, SPI, USART (1 each) |
| I/O Pins | 25 |
| Internal Oscillator | 16 MHz (precision) |
| 封裝 | 28-pin SSOP (5.30 mm width) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40 °C to +85 °C (industrial) |
| Low-Power Technology | nanoWatt XLP |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| RoHS 狀態 | Compliant |
PIC16LF722AT-I/SS 腳位配置
| 腳位 1 | VDD — Positive supply voltage (1.8V-3.6V) |
| 腳位 2 | RA5 — Bidirectional I/O / digital-only |
| 腳位 3 | RA4 — Bidirectional I/O |
| 腳位 4 | RA3 — Bidirectional I/O / MCLR |
| 腳位 5 | RC5 — Bidirectional I/O |
| 腳位 6 | RC4 — Bidirectional I/O |
| 腳位 7 | RC3 — Bidirectional I/O |
| 腳位 8 | RC2 — Bidirectional I/O |
| 腳位 9 | RC1 — Bidirectional I/O |
| 腳位 10 | RC0 — Bidirectional I/O |
| 腳位 11 | RA2 — Bidirectional I/O |
| 腳位 12 | RA1 — Bidirectional I/O / ICSPCLK |
| 腳位 13 | RA0 — Bidirectional I/O / ICSPDAT |
| 腳位 14 | VSS — Ground reference |
| 腳位 15 | RB7 — Bidirectional I/O |
| 腳位 16 | RB6 — Bidirectional I/O |
| 腳位 17 | RB5 — Bidirectional I/O |
| 腳位 18 | RB4 — Bidirectional I/O |
| 腳位 19 | RB3 — Bidirectional I/O |
| 腳位 20 | RB2 — Bidirectional I/O |
| 腳位 21 | RB1 — Bidirectional I/O |
| 腳位 22 | RB0 — Bidirectional I/O |
| 腳位 23 | RE3 — Digital-only input |
| 腳位 24 | RC7 — Bidirectional I/O |
| 腳位 25 | RC6 — Bidirectional I/O |
| 腳位 26 | VDD — Positive supply voltage (1.8V-3.6V) |
| 腳位 27 | VSS — Ground reference |
| 腳位 28 | RA7 — Bidirectional I/O / oscillator |
典型應用
PIC16LF722AT-I/SS 適用於 6 應用s: IoT Sensor Endpoint Nodes, Battery-Powered Consumer Devices, Industrial Sensor Interfaces, Home Automation Modules, Electronic Metering and Sub-Metering, Wearable Health Monitoring Prototypes.
IoT Sensor Endpoint Nodes
The PIC16LF722AT-I/SS is well suited for IoT sensor endpoint nodes because its nanoWatt XLP technology delivers sub-µA sleep currents that extend coin-cell battery life to multi-year durations. Its 1.8V-3.6V VDD range matches 3.3V wireless module supplies and supports direct battery operation without boost converters. The 11-channel 8-bit ADC accepts multiple analog sensors (temperature, light, gas), while the integrated I2C/SPI/USART interfaces connect to external radios (LoRa, BLE, sub-GHz transceivers). With 3.5KB Flash and 128-byte RAM, the MCU runs basic sensor fusion, periodic sampling, and over-the-air updates via bootloader, satisfying the typical 5-15KB footprint of low-rate IoT applications.
推薦
Battery-Powered Consumer Devices
Consumer devices such as remote controls, electronic toys, and wireless keyboards benefit from the PIC16LF722AT-I/SS's nanoWatt XLP sleep current profile, which enables multi-year battery life on two AAA cells. The 20 MHz CPU executes user-interface logic, button debouncing, and RF protocol stacks without taxing the 3.5KB Flash budget. The 25 I/O pins handle key matrix scanning, LED/PWM indicators, and IR or 2.4 GHz radio control. Operating at 1.8V-3.6V directly from alkaline or lithium primaries, the MCU eliminates the need for boost converters, simplifying the BOM and shrinking the PCB footprint in space-constrained consumer products.
推薦
Industrial Sensor Interfaces
Industrial 4-20 mA loop-powered sensors, RTD/thermocouple transmitters, and process monitor modules leverage the PIC16LF722AT-I/SS's industrial -40°C to +85°C operating range, robust ESD performance, and 11-channel 8-bit ADC. The MCU's programmable code protection, watchdog timer, and brown-out reset ensure deterministic recovery from brown-out and firmware fault events on noisy industrial buses. SPI/I2C connectivity allows pairing with external digital isolators and HART modems, while USART supports RS-485 link layers. With 3.5KB Flash, the MCU hosts IEC 61131-3-style logic, calibration routines, and HART command sets typical of smart sensor designs.
推薦
Home Automation Modules
Smart home modules for lighting control, motorized blinds, and HVAC dampers use the PIC16LF722AT-I/SS to consolidate logic, sensing, and triac/relay drive on a single 1.8V-3.6V MCU. The USART enables RS-485 or KNX-style wired communication, while I2C connects to digital temperature sensors and capacitive touch controllers. The 11 ADC channels read potentiometers, photodiodes, and current shunts for closed-loop control. XLP sleep modes keep idle-state power below 1 µA, allowing always-on wall-powered or battery-backed designs. The 28-SSOP package's 5.30 mm width fits standard appliance control board footprints without modification.
推薦
Electronic Metering and Sub-Metering
Single-phase energy meters, water/gas flow counters, and sub-metering nodes use the PIC16LF722AT-I/SS for pulse counting, ADC-based current sensing, and on-board calibration. The 8-bit ADC samples current shunts or Hall-effect sensor outputs, while the USART drives an IrDA or RS-485 communication port for AMR/AMI integration. nanoWatt XLP technology supports multi-year battery operation for non-line-powered metering. With 3.5KB Flash and 128 bytes RAM, the MCU executes pulse accumulation, RMS calculation, and LCD drive waveforms suitable for metrology-grade sub-1% accuracy designs in residential and light-commercial settings.
推薦
Wearable Health Monitoring Prototypes
Prototype wearable health devices such as heart-rate patches, pulse oximeters, and wearable thermometers use the PIC16LF722AT-I/SS for biosignal acquisition, low-power sampling, and BLE/HID bridging. The 1.8V-3.6V VDD range aligns with single-cell LiPo or coin-cell batteries, while XLP sleep currents minimize idle drain between sample bursts. SPI connects to PPG/AFE front ends and accelerometer ICs; I2C drives small OLED status displays. With 20 MHz CPU, the MCU performs basic digital filtering and threshold detection in firmware without requiring an external DSP. The 28-SSOP package supports reflow assembly on small, flexible PCB substrates used in wearable prototypes.
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推薦產品摘要
工程參考資料，適用於 PIC16LF722AT-I/SS — 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 | PIC16LF722A-I/SS | PIC16LF720-I/SS | PIC16LF1938-I/SS | PIC16LF1939-I/SS | PIC16F722A-I/SS | PIC16LF1902-I/SS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) |
| Flash Memory | 3.5 KB | 3.5 KB | 3.5 KB | 28 KB | 16 KB | 3.5 KB | 3.5 KB |
| RAM | 128 bytes | 128 bytes | 128 bytes | 1 KB | 1 KB | 128 bytes | 128 bytes |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 32 MHz | 32 MHz | 20 MHz | 20 MHz |
| Operating Voltage (VDD) | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.0 V to 5.5 V | 1.8 V to 3.6 V |
| ADC Channels / Resolution | 11 ch / 8-bit | 11 ch / 8-bit | 11 ch / 8-bit | 11 ch / 10-bit | 11 ch / 10-bit | 11 ch / 8-bit | 8 ch / 10-bit |
| Communication Interfaces | I2C, SPI, USART | I2C, SPI, USART | I2C, SPI, USART | 2x I2C, 2x SPI, 2x USART | 2x I2C, 2x SPI, 2x USART | I2C, SPI, USART | I2C, SPI, USART |
| Low-Power Technology | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | Standard LP | nanoWatt XLP |
主要差異化特點
- Tape and Reel packaging for SMT volume production (對比PIC16LF722A-I/SS)
- Balanced 3.5KB Flash for compact XLP firmware (對比PIC16LF1938-I/SS)
- True 1.8V-3.6V VDD range for single-cell LiPo designs (對比PIC16F722A-I/SS)
- Integrated I2C, SPI, and USART for sensor + radio (對比PIC16LF720-I/SS)
設計說明
Place a 100 nF decoupling capacitor within 5 mm of each VDD pin (pins 1 and 26 on 28-SSOP) and a bulk 10 µF capacitor at the board's power entry. For nanoWatt XLP sleep-current-critical designs, disable unused peripherals in firmware and use the PPS module to remap functions to low-leakage pins. Always enter Sleep mode with all peripherals quiescent — leaving the ADC or USART enabled can raise sleep current from sub-µA to tens of µA.
Route the ICSP lines (RB6/ICSPCLK and RB7/ICSPDAT) with short traces and provision a 6-pin header for in-circuit programming. For SSOP packages, use a 0.65 mm pitch land pattern with 0.4 mm × 0.2 mm pads; a 0.1 mm solder mask sliver between pads is recommended to prevent bridging during reflow. Keep the 28-SSOP's thermal pad (if present on exposed-pad variant) soldered to a 0.5 cm² copper pour connected to VSS.
Avoid configuring the MCLR pin as RA3 input without external pull-up — leaving MCLR floating can cause spurious resets. The internal 16 MHz oscillator is accurate to ±2% over temperature; designs requiring RS-485 or LIN timing tolerance should select a 20 MHz external crystal. Do not exceed VDD = 3.6 V absolute maximum or the Flash program memory retention may be compromised. The ADC requires acquisition time matching the source impedance — high-impedance sensors need a 4 µs acquisition or an external buffer.
When using the PIC16LF722AT-I/SS as an SPI master to radios or displays, keep SPI traces under 50 mm and add a 33 Ω series resistor at the SCK/MOSI driver for EMI control. Place the SPI bus on an inner PCB layer if possible, and route the SCK trace adjacent to a continuous ground plane. For I2C, use 4.7 kΩ pull-ups at 100 kHz Standard mode or 2.2 kΩ at 400 kHz Fast mode; verify timing margin with the actual bus capacitance.
合規資訊
RoHS and REACH compliance confirmed via Microchip product declaration. Not AEC-Q100 qualified; for automotive applications migrate to AEC-Q100-qualified PIC16F722A variants or PIC16F1938/1939 with Q-suffix package marking.
