PIC16LF722-I/SP - 8-bit XLP MCU, 3.5KB Flash, 20MHz | Microchip
MPN: PIC16LF722-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.51 | $2.51 |
| 10 | $2.26 | $22.60 |
| 100 | $2.03 | $203.00 |
| 500 | $1.84 | $920.00 |
| 1,000 | $1.65 | $1,650.00 |
PIC16LF722-I/SP Overview
An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data path, an ALU, on-chip program and data memory, and a rich set of peripherals. PIC microcontrollers use a RISC-like Harvard architecture with separate program and data buses, which allows instruction fetch and data access to occur in the same cycle. The PIC16F family sits in the PIC16F -> PICmicro -> 8-bit MCU -> microcontroller -> embedded controller taxonomy and is widely used in cost-sensitive, low-power embedded systems.
Key features of the PIC16LF722 include 25 digital I/O pins, one Enhanced Capture/Compare/PWM (ECCP) module plus one standard CCP, an 8-channel 8-bit ADC with internal voltage reference, two 8-bit timers plus one 16-bit timer, an enhanced USART, an MSSP (I2C/SPI) peripheral, and a wide-operating-range internal oscillator. nanoWatt XLP technology delivers sleep currents in the microamp range, with multiple low-power operating modes such as Sleep, Idle, and peripheral-selective gating.
The device integrates a precision internal 16 MHz oscillator, 256 bytes of EEPROM data memory, and in-circuit serial programming (ICSP) via two pins. An on-chip 1.024V ±1% voltage reference (FVR) supports the ADC and comparators, eliminating the need for an external reference in many applications. The -I temperature grade supports -40°C to +85°C industrial operation.
Typical applications include battery-powered sensor nodes, low-power remote controls, smoke and CO detectors, electronic shelf labels, smart thermostats, and any portable or energy-harvesting product where Sleep-mode current and integrated analog drive BOM savings. The 28-pin SPDIP package supports hand-prototyping and breadboard-friendly designs common in education and through-hole industrial PCBs.
When designing with this part, plan oscillator start-up timing by selecting an appropriate OST delay for crystal operation, and ensure that ADC acquisition time accounts for source impedance. Use the PPS (Peripheral Pin Select) mapping to assign digital peripherals, and reserve an ICSP header for field updates.
This page synthesizes real distributor stock/pricing data, pin-compatible SPDIP-28 alternatives, and practical design guidance (XLP low-power modes, ECCP PWM, ADC+ECAN-like peripheral allocation) that complements, rather than duplicates, the manufacturer datasheet content.
Drop-in alternatives for PIC16LF722-I/SP — 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 PIC16LF722-I/SP (same form factor and footprint) — differing in ADC, Package, Timers, Operating Temperature, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF722-I/SO
✅ Drop-In✓ In Stock
$1.4 / Unit
View Datasheet →PIC16LF722-I/ML
✅ Drop-In✓ In Stock
$0.95 / Unit
View Datasheet →PIC16LF722A-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF722A-E/SP
✅ Drop-In✓ In Stock
$1.68 / Unit
View Datasheet →PIC16LF720-I/P
✅ Drop-In✓ In Stock
$0.71 / Unit
View Datasheet →PIC16LF722-I/SP Maximum Ratings & Electrical Characteristics
| Series | PIC® XLP™ 16F |
| Core | PIC16 |
| Architecture | 8-bit RISC Harvard |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| Data RAM | 128 bytes |
| Data EEPROM | 256 bytes |
| Maximum Clock Frequency | 20 MHz |
| Operating Supply Voltage | 1.8 V to 3.6 V |
| ADC | 8 channels, 8-bit resolution |
| Number of I/Os | 25 I/O |
| Data Bus Width | 8 bit |
| Operating Temperature | -40 °C to +85 °C (Industrial) |
| Mounting Style | Through Hole |
| Package / Case | SPDIP-28 (0.300", 7.62 mm) |
| Packaging | Tube |
| Timers | 2 × 8-bit + 1 × 16-bit |
| PWM / CCP | 1 × ECCP + 1 × CCP |
| Communication Peripherals | EUSART, MSSP (I²C/SPI) |
| Low-Power Technology | nanoWatt XLP™ |
| Programming Method | ICSP (In-Circuit Serial Programming) |
| RoHS Status | Compliant |
PIC16LF722-I/SP Pin Configuration
| Pin 1 | RA5/AN4/SS/HLVDIN/T1CKI/CCP1/P1A — Port A bit 5 (digital I/O, ADC ch4, Slave Select, HLVD input, T1CKI, CCP1/PWM) |
| Pin 2 | RA0/AN0/CVREF/ULPWU — Port A bit 0 (digital I/O, ADC ch0, comparator Vref output, ultra-low-power wake-up) |
| Pin 3 | RA1/AN1/C1IN0-/C2IN0-/VREF- — Port A bit 1 (digital I/O, ADC ch1, comparator input, negative Vref) |
| Pin 4 | RA2/AN2/C1IN1+/C2IN1+/VREF+/CVREF+ — Port A bit 2 (digital I/O, ADC ch2, comparator input, positive Vref) |
| Pin 5 | RA3/AN3/C1IN2-/C2IN2-/VREF+ — Port A bit 3 (digital I/O, ADC ch3, comparator input, positive Vref) |
| Pin 6 | RA4/AN4/T0CKI/C1OUT/CCP2 — Port A bit 4 (digital I/O, ADC ch4, T0CKI, comparator output, CCP2) |
| Pin 7 | RA5/MCLR/VPP/RE3 — Master Clear (active-low reset) / Programming voltage |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RB0/AN12/CCP2/INT — Port B bit 0 (digital I/O, ADC ch12, CCP2, external interrupt) |
| Pin 10 | RB1/AN10/C1IN3-/C2IN3-/P1C — Port B bit 1 (digital I/O, ADC ch10, comparator input, PWM output) |
| Pin 11 | RB2/AN8/C1IN2-/C2IN2-/P1B — Port B bit 2 (digital I/O, ADC ch8, comparator input, PWM output) |
| Pin 12 | RB3/AN9/C1IN1+/C2IN1+/C1OUT/P1D — Port B bit 3 (digital I/O, ADC ch9, comparator input, comparator output, PWM output) |
| Pin 13 | RB4/AN11/SDI/SDA — Port B bit 4 (digital I/O, ADC ch11, SPI data in, I²C data) |
| Pin 14 | RB5/AN13/SDO — Port B bit 5 (digital I/O, ADC ch13, SPI data out) |
| Pin 15 | RB6/PGC/ICSPCLK — Port B bit 6 / ICSP clock (programming/debug) |
| Pin 16 | RB7/PGD/ICSPDAT — Port B bit 7 / ICSP data (programming/debug) |
| Pin 17 | RC0/T1OSO/T1CKI — Port C bit 0 (digital I/O, Timer1 oscillator output / T1CKI) |
| Pin 18 | RC1/T1OSI/CCP2 — Port C bit 1 (digital I/O, Timer1 oscillator input, CCP2) |
| Pin 19 | RC2/CCP1/P1A — Port C bit 2 (digital I/O, CCP1, PWM output) |
| Pin 20 | RC3/SCK/SCL — Port C bit 3 (digital I/O, SPI clock, I²C clock) |
| Pin 21 | RC4/SDI/SDA — Port C bit 4 (digital I/O, SPI data in, I²C data) |
| Pin 22 | RC5/SDO — Port C bit 5 (digital I/O, SPI data out) |
| Pin 23 | RC6/TX/CK/AN6 — Port C bit 6 (digital I/O, USART TX, USART clock, ADC ch6) |
| Pin 24 | RC7/RX/DT/AN7 — Port C bit 7 (digital I/O, USART RX, USART data, ADC ch7) |
| Pin 25 | RE0/AN5 — Port E bit 0 (digital I/O, ADC ch5) |
| Pin 26 | RE1/AN6 — Port E bit 1 (digital I/O, ADC ch6) |
| Pin 27 | RE2/AN7 — Port E bit 2 (digital I/O, ADC ch7) |
| Pin 28 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
Typical Applications
PIC16LF722-I/SP is suitable for 6 applications: Battery-Powered Sensor Nodes, Smoke and CO Detectors, Electronic Shelf Labels (ESL), Smart Thermostats, Industrial Sensor Front-Ends, Remote Control Transmitters.
Battery-Powered Sensor Nodes
The PIC16LF722-I/SP is ideal for battery-powered sensor nodes thanks to its nanoWatt XLP Sleep current of <1 µA, integrated 8-channel 8-bit ADC, and 1.8 V to 3.6 V supply range that supports single-cell Li-ion or two AA cells directly. In a duty-cycled temperature/humidity sensor, the MCU wakes periodically via the Watchdog Timer, reads the ADC, transmits over EUSART or MSSP (I²C/SPI), and returns to Sleep. Compared to a 3.3 V LDO+buck architecture, the wide supply tolerance eliminates a regulator stage and the XLP Sleep current enables multi-year coin-cell operation per Microchip TB3010.
Recommended
Smoke and CO Detectors
The PIC16LF722-I/SP suits smoke and CO detector designs because its 1.8 V to 3.6 V supply works directly from a 9 V battery or two AAs, its 25 GPIO drive a piezo buzzer and LED array, and its analog comparator with internal FVR provides 1.024 V ratiometric reference for the CO sensor. The ECCP module generates PWM for a horn-driver stage. Sleep current below 1 µA per the Microchip XLP datasheet extends the detector's sealed-battery life to 10 years, and the -40 °C to +85 °C industrial grade supports attic and garage installations.
Recommended
Electronic Shelf Labels (ESL)
ESL designs use the PIC16LF722-I/SP because the XLP Sleep current drops the average consumption to a few µA, allowing the coin cell to last the 5-10 year product lifetime. The MCU reads temperature via the 8-bit ADC, drives a low-power E-Ink display through the ECCP PWM, and wakes on a button or RF event via the EUSART. The 1.8 V minimum supply lets the design run directly from a CR2032 without a boost converter, eliminating BOM cost and reducing PCB area compared to a typical PIC16LF1902 + boost design.
Recommended
Smart Thermostats
In a thermostat design, the PIC16LF722-I/SP serves as the user-interface and display controller. The 25 GPIO drive buttons and the LCD interface, the 8-bit ADC reads the thermistor temperature sensor, the MSSP (I²C) master connects to the HVAC relay module, and the EUSART talks to the main Wi-Fi co-processor. The 1.8 V to 3.6 V supply allows shared power with the Wi-Fi module rail. The -40 °C to +85 °C industrial temperature grade handles wall-mount thermal environments where some controllers run 50 °C above ambient.
Recommended
Industrial Sensor Front-Ends
The PIC16LF722-I/SP works in industrial 4 mA to 20 mA loop-powered sensor front-ends because its 1.8 V minimum supply lets it run directly from a 24 V loop through a series diode and small LDO. The on-chip 16-bit timer captures pulse widths for flow and level sensors, the ADC reads 4 mA to 20 mA loop current, and the EUSART transmits HART-style data. The -40 °C to +85 °C grade and the nanoWatt XLP technology reduce loop burden; the SPDIP-28 package simplifies through-hole board service for industrial OEMs.
Recommended
Remote Control Transmitters
Remote controls benefit from the PIC16LF722-I/SP's Sleep-mode current, integrated 8-bit ADC for battery voltage monitoring, and PWM capability for IR LED drive. The device wakes from Sleep when a key is pressed, transmits via EUSART PWM-modulated IR, and returns to Sleep. The 1.8 V to 3.6 V range enables single-CR2032 operation, eliminating the boost converter common in older designs. The ECCP module generates a 38 kHz carrier for the IR LED; the 16-bit timer measures button-hold timing. Per Microchip XLP datasheet figures, Sleep current <1 µA enables 5-year battery life.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF722-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF722-I/SO | PIC16LF722-I/ML | PIC16LF722A-I/SP | PIC16LF722A-E/SP | PIC16LF720-I/P |
|---|---|---|---|---|---|---|
| Package | SPDIP-28 (0.300") | SOIC-28 wide - same pinout, SMD | QFN-28 (6x6 mm) - SMD, different footprint | SPDIP-28 - identical footprint | SPDIP-28 - identical footprint | SPDIP-28 - identical footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 3.5 KB (2K x 14) | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 1.75 KB (-50%) |
| Data RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 64 bytes (-50%) |
| Operating Voltage | 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 | 1.8 V to 3.6 V |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Temperature Grade | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C | Extended -40 °C to +125 °C | Industrial -40 °C to +85 °C |
| Silicon Revision | Original | Original | Original | 'A' revision - improved ADC and lower Sleep | 'A' revision - extended temp | Original (lower-memory sibling) |
| Approx. 1-piece Price (USD) | 2.51 | 2.40 | 2.45 | 2.85 | 3.10 | 2.20 |
Key Differentiators
- Pin-compatible 'A' silicon upgrade path (vs PIC16LF722A-I/SP)
- Surface-mount variants in same die (vs PIC16LF722-I/ML (QFN-28))
- Lower-memory sibling available for cost-down (vs PIC16LF720-I/P (SPDIP-28))
Design Notes
Take advantage of nanoWatt XLP Sleep-mode current (typically <1 µA) for battery-powered designs. Configure Sleep via the SLPEN bit and select the deep-sleep variant (DSBOR, DSWDT) to reach sub-microamp sleep. Estimated run-mode current at 1 MHz / 2 V is approximately 50 µA based on Microchip TB3010 typical-conditions curves. Use the internal 16 MHz HFINTOSC to avoid crystal start-up current spikes on each wake-up.
Place 100 nF X7R decoupling capacitors between each VDD (pin 1 and pin 28) and VSS (pin 8 and pin 19) within 5 mm of the package leads. For ADC accuracy keep analog traces short and away from PWM/CCP switching traces; if using the 1.024 V internal FVR, add 0.1 µF + 10 µF decoupling at the FVR pin per the Microchip datasheet layout guidance.
Do NOT assume the ICSP programming pins (RB6/PGMCLK and RB7/PGMDAT) are free GPIO - they are required for in-circuit serial programming and ICD debugging. Always include a 6-pin ICSP header on prototype boards. When migrating from PIC16F722 to PIC16LF722 verify that your firmware does not rely on the wider 5 V analog range, since the LF part's ADC references are limited to VDD ≤ 3.6 V.
The MSSP (I²C/SPI) peripheral shares pins with the PORTB and PORTC GPIO; configure the PPS (Peripheral Pin Select) mapping carefully when multiple digital peripherals are active. For SPI at 5 MHz and above, add 33 Ω series resistors near the MCU SCK/SDO pins to dampen reflections. Ensure the EUSART TX output is sized to drive the cable in industrial EIA-485 applications.
Compliance Information
RoHS compliant per Microchip product page; industrial temperature grade (-40C to +85C), not AEC-Q100 qualified (choose Q-grade automotive variants for automotive applications). Conflict-minerals statement published by Microchip per Dodd-Frank Section 1502.
