PIC16LF722AT-I/SS - 8-Bit 20MHz 3.5KB Flash XLP MCU | Microchip
MPN: PIC16LF722AT-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.48 | $148.00 |
| 500 | $1.32 | $660.00 |
| 1,000 | $1.18 | $1,180.00 |
| 3,000 | $1.05 | $3,150.00 |
PIC16LF722AT-I/SS Overview
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.
Drop-in alternatives for PIC16LF722AT-I/SS — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16LF722AT-I/SS (same form factor and footprint) — differing in ADC, Operating Temperature, Package, Communication Interfaces, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF722A-I/SS
✅ Drop-In✓ In Stock
$1.15 / Unit
View Datasheet →PIC16LF720-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1938-I/SS
✅ Drop-In✓ In Stock
$2.21 / Unit
View Datasheet →PIC16LF1939-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F722A-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1902-I/SS
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →PIC16LF722AT-I/SS Maximum Ratings & Electrical Characteristics
| 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) |
| Package | 28-pin SSOP (5.30 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 °C to +85 °C (industrial) |
| Low-Power Technology | nanoWatt XLP |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| RoHS Status | Compliant |
PIC16LF722AT-I/SS Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8V-3.6V) |
| Pin 2 | RA5 — Bidirectional I/O / digital-only |
| Pin 3 | RA4 — Bidirectional I/O |
| Pin 4 | RA3 — Bidirectional I/O / MCLR |
| Pin 5 | RC5 — Bidirectional I/O |
| Pin 6 | RC4 — Bidirectional I/O |
| Pin 7 | RC3 — Bidirectional I/O |
| Pin 8 | RC2 — Bidirectional I/O |
| Pin 9 | RC1 — Bidirectional I/O |
| Pin 10 | RC0 — Bidirectional I/O |
| Pin 11 | RA2 — Bidirectional I/O |
| Pin 12 | RA1 — Bidirectional I/O / ICSPCLK |
| Pin 13 | RA0 — Bidirectional I/O / ICSPDAT |
| Pin 14 | VSS — Ground reference |
| Pin 15 | RB7 — Bidirectional I/O |
| Pin 16 | RB6 — Bidirectional I/O |
| Pin 17 | RB5 — Bidirectional I/O |
| Pin 18 | RB4 — Bidirectional I/O |
| Pin 19 | RB3 — Bidirectional I/O |
| Pin 20 | RB2 — Bidirectional I/O |
| Pin 21 | RB1 — Bidirectional I/O |
| Pin 22 | RB0 — Bidirectional I/O |
| Pin 23 | RE3 — Digital-only input |
| Pin 24 | RC7 — Bidirectional I/O |
| Pin 25 | RC6 — Bidirectional I/O |
| Pin 26 | VDD — Positive supply voltage (1.8V-3.6V) |
| Pin 27 | VSS — Ground reference |
| Pin 28 | RA7 — Bidirectional I/O / oscillator |
Typical Applications
PIC16LF722AT-I/SS is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF722AT-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Tape and Reel packaging for SMT volume production (vs PIC16LF722A-I/SS)
- Balanced 3.5KB Flash for compact XLP firmware (vs PIC16LF1938-I/SS)
- True 1.8V-3.6V VDD range for single-cell LiPo designs (vs PIC16F722A-I/SS)
- Integrated I2C, SPI, and USART for sensor + radio (vs PIC16LF720-I/SS)
Design Notes
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.
Compliance Information
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.
