PIC16LF737-I/SO - 8-bit MCU 7KB Flash 25 I/O 28-SOIC | Microchip
MPN: PIC16LF737-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.19 | $5.19 |
| 10 | $4.72 | $47.20 |
| 100 | $4.25 | $425.00 |
| 500 | $3.82 | $1,910.00 |
| 1,000 | $3.4 | $3,400.00 |
| 3,000 | $2.64 | $7,920.00 |
PIC16LF737-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and a rich set of peripherals such as timers, ADC, communication interfaces, and GPIO. PIC microcontrollers from Microchip use a RISC-based Harvard architecture with a small, deterministic instruction set, and they sit within the broader semiconductor hierarchy as general-purpose embedded controllers under the umbrella of logic and microcontrollers (Integrated Circuits > Microcontrollers). The PIC16F family specifically targets mid-range 8-bit applications requiring balanced performance, peripheral integration, and ultra-low-power operation.
Key features of the PIC16LF737-I/SO include 368 bytes of RAM, 25 digital I/O pins, three timers, a 11-channel 10-bit ADC, a USART, an SSP module supporting SPI and I2C, two analog comparators, and an ICD (In-Circuit Debugger) interface. The integrated NanoWatt technology provides flexible power management options, including multiple idle and sleep modes that reduce quiescent current to the microampere range for battery-sensitive applications.
Architecturally, the PIC16LF737 employs a 14-bit instruction word and a separate data path, with Flash program memory that supports in-circuit self-programming for field upgrades. The device is supported by the MPLAB X IDE and the XC8 compiler toolchain, with a large library of application notes, reference designs, and peripheral libraries available from Microchip.
Typical applications include industrial control nodes, sensor interface modules, low-power remote sensors, battery-powered instrumentation, and home appliance control boards. The combination of analog integration (ADC + comparators) and digital I/O makes the part particularly suited to mixed-signal embedded systems.
When designing with this device, ensure decoupling capacitors are placed close to VDD/VSS, verify operating voltage against peripheral ratings, and budget sufficient Flash endurance cycles for field-update use cases. Developers should also note that the I/SO industrial temperature grade is rated -40C to +85C.
This page synthesizes distributor pricing, drop-in same-package alternatives, comparison data, and practical design notes not found in the manufacturer datasheet alone, helping engineers make faster sourcing and design decisions.
Drop-in alternatives for PIC16LF737-I/SO — 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 PIC16LF737-I/SO (same form factor and footprint) — differing in Maximum CPU Speed, Operating Temperature, Package, Program Memory, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F737-I/SO
✅ Drop-In✓ In Stock
$3.89 / Unit
View Datasheet →PIC16F737T-I/SO
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC16LF737-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.64 / Unit
View Datasheet →PIC16LF727-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF727-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF737-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Family | PIC16F |
| Program Memory | 7 KB Flash (4K x 14 words) |
| RAM | 368 bytes |
| Maximum CPU Speed | 10 MHz (10 MIPS) |
| Supply Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 11 channels, 10-bit |
| Timers | 3 |
| Communication Interfaces | USART, SSP (SPI / I2C) |
| Comparators | 2 analog comparators |
| Package | 28-pin SOIC (SO, 7.50 mm body width) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (ROHS3) |
| Lead-Free | Yes |
| Debug Interface | In-Circuit Debugger (ICD) |
| Power-Saving Technology | NanoWatt (multiple idle/sleep modes) |
PIC16LF737-I/SO Pin Configuration
| Pin 1 | RA2/AN2/VREF-/CVREF — GPIO RA2 / ADC channel 2 / VREF- / comparator reference output |
| Pin 2 | RA3/AN3/VREF+ — GPIO RA3 / ADC channel 3 / VREF+ |
| Pin 3 | RA4/AN4/T0CKI — GPIO RA4 / ADC channel 4 / Timer0 clock input |
| Pin 4 | RA5/AN5/SS/LVDIN — GPIO RA5 / ADC channel 5 / SPI slave select / LVD input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Pin 7 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Pin 8 | RC0/T1OSO/T1CKI — GPIO RC0 / Timer1 oscillator output / Timer1 clock input |
| Pin 9 | RC1/T1OSI/CCP2 — GPIO RC1 / Timer1 oscillator input / CCP2 |
| Pin 10 | RC2/CCP1 — GPIO RC2 / CCP1 (PWM/capture/compare) |
| Pin 11 | RC3/SCK/SCL — GPIO RC3 / SPI clock / I2C clock |
| Pin 12 | RC4/SDI/SDA — GPIO RC4 / SPI data in / I2C data |
| Pin 13 | RC5/SDO — GPIO RC5 / SPI data out |
| Pin 14 | RC6/TX/CK — GPIO RC6 / USART TX / USART clock |
| Pin 15 | RC7/RX/DT — GPIO RC7 / USART RX / USART data |
| Pin 16 | VSS — Ground reference (digital) |
| Pin 17 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| Pin 18 | RB0/INT — GPIO RB0 / external interrupt |
| Pin 19 | RB1 — GPIO RB1 |
| Pin 20 | RB2 — GPIO RB2 |
| Pin 21 | RB3/PGM — GPIO RB3 / LVP programming |
| Pin 22 | RB4 — GPIO RB4 |
| Pin 23 | RB5 — GPIO RB5 |
| Pin 24 | RB6/PGC — GPIO RB6 / ICD clock |
| Pin 25 | RB7/PGD — GPIO RB7 / ICD data |
| Pin 26 | RA0/AN0 — GPIO RA0 / ADC channel 0 |
| Pin 27 | RA1/AN1 — GPIO RA1 / ADC channel 1 |
| Pin 28 | VSS — Ground reference |
Typical Applications
PIC16LF737-I/SO is suitable for 6 applications: Industrial Sensor Interface Module, Battery-Powered Remote Sensor Node, Home Appliance Control Board, Automotive Body Electronics (Sub-system), HVAC Thermostat Controller, Small IoT / Smart Home Edge Node.
Industrial Sensor Interface Module
The PIC16LF737-I/SO fits industrial sensor interface modules because its 11-channel 10-bit ADC, 2 analog comparators, and 25 GPIO pins allow direct connection to multiple analog sensors, op-amp signal chains, and digital actuators. The 2.0-5.5 V supply range supports both legacy 5 V PLC backplanes and modern 3.3 V sensor nodes. With 7 KB Flash and 368 bytes RAM, the MCU can run PID loops, calibration routines, and Modbus RTU framing over the on-chip USART. The 10 MIPS performance at 10 MHz easily handles 1 ms control loops. Industrial designers benefit from the wide SOIC-28 package, which is ruggedized for hand-soldering and rework in field-installed equipment.
Recommended
Battery-Powered Remote Sensor Node
For battery-powered remote sensor nodes, the PIC16LF737-I/SO is an excellent fit thanks to its 2.0 V minimum VDD and NanoWatt sleep modes, which drop quiescent current to microampere levels between sensor reads. The integrated 10-bit ADC samples battery voltage and sensor signals, while the USART or SSP module transmits data over a low-power radio or wired link. With 368 bytes of RAM and 7 KB Flash, designers can implement buffering, averaging, and lightweight MAC protocols. The wide SOIC-28 form factor simplifies hand-prototyping for low-volume remote-monitoring products such as environmental loggers, smart-agriculture sensors, and asset trackers.
Recommended
Home Appliance Control Board
The PIC16LF737-I/SO targets home appliance control boards (washing machines, dishwashers, small kitchen appliances) where its 25 GPIO pins drive relays, triacs, LEDs, keypads, and seven-segment displays. Three on-chip timers handle PWM for motor speed control and triac phase-angle firing, while the 11-channel ADC monitors motor current, temperature, and water level. The 7 KB Flash accommodates state-machine firmware for wash-cycle sequencing. The industrial -40 C to +85 C temperature rating and 28-SOIC wide-body package suit the thermal and mechanical demands of appliance PCB assemblies. The NanoWatt sleep mode cuts standby power below 1 mA for energy-star compliance.
Recommended
Automotive Body Electronics (Sub-system)
In non-safety automotive body electronics such as lighting controllers, HVAC blend-door actuators, and accessory multiplexers, the PIC16LF737-I/SO provides 25 GPIO, an 11-channel ADC, and PWM timers that map directly to lamp drivers, BLDC fan control, and switch-matrix inputs. The wide -40 C to +85 C industrial temperature range covers cabin environments, and the 28-SOIC package tolerates automotive PCB assembly processes. Designers use the SSP module to interface with LIN slaves or I2C peripherals. For safety-critical or under-hood applications, the PIC16LF1939-I/P from the upgraded XLP family is recommended instead because of its AEC-Q100 grade and extended temperature range.
Recommended
HVAC Thermostat Controller
The PIC16LF737-I/SO serves as the main MCU in HVAC thermostat controllers, where its 10-bit ADC reads temperature sensors (NTC thermistors, IC sensors) and its 3 timers generate PWM outputs for relay/solenoid valves, fan-speed control, and LCD backlight dimming. The 7 KB Flash stores scheduling firmware, hysteresis tables, and UI state machines, while 368 bytes RAM holds the menu stack and sampled sensor history. The 25 GPIO directly drive button matrices, character LCDs, and status LEDs. The 2.0-5.5 V VDD range lets the same firmware run on 24VAC-derived 5 V rails or battery-backed 3.3 V supplies.
Recommended
Small IoT / Smart Home Edge Node
For low-bandwidth IoT edge nodes, the PIC16LF737-I/SO provides enough Flash (7 KB) and RAM (368 bytes) to run MQTT-SN over UART, sensor pre-processing, and secure key handling for sub-GHz radios. The on-chip ADC and comparators interface with environmental sensors (temperature, humidity, light) without external signal conditioning. NanoWatt technology lets the MCU sleep below 1 uA between transmissions, extending coin-cell lifetime. The 28-SOIC package fits inside compact sensor modules, and the part is supported by MPLAB X IDE and the open-source XC8 compiler for rapid firmware iteration.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF737-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F737-I/SO | PIC16F737T-I/SO | PIC16LF727-I/SO | PIC16LF727-E/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SOIC | 28-pin SOIC - same | 28-pin SOIC - same | 28-pin SOIC - same | 28-pin SOIC - same |
| Program Memory (Flash) | 7 KB | 7 KB | 7 KB | 3.5 KB | 3.5 KB |
| RAM | 368 bytes | 368 bytes | 368 bytes | 192 bytes | 192 bytes |
| Operating Voltage | 2.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Maximum CPU Speed | 10 MHz / 10 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS |
| I/O Pins | 25 | 25 | 25 | 25 | 25 |
| ADC | 11-ch, 10-bit | 11-ch, 10-bit | 11-ch, 10-bit | 11-ch, 10-bit | 11-ch, 10-bit |
| NanoWatt Low-Power Modes | Yes | No | No | Yes | Yes |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (extended) |
Key Differentiators
- Wider operating voltage range with NanoWatt technology (vs PIC16F737-I/SO)
- Double the Flash memory of the PIC16LF727 family (vs PIC16LF727-I/SO)
- Larger RAM for buffering and protocol stacks (vs PIC16LF727-I/SO)
Design Notes
The PIC16LF737-I/SO supports 2.0 V to 5.5 V on VDD (pin 17). Place a 100 nF decoupling capacitor as close as possible between VDD (pin 17) and the nearest VSS pin (pin 16 or 28). For designs that switch between active and sleep modes, add a 10 uF bulk capacitor on VDD to handle inrush currents from peripherals waking on the same rail. Use MCP1700 or similar low-Iq LDOs for battery-powered applications so quiescent draw does not exceed 1.6 uA.
Keep the crystal traces (OSC1/CLKIN pin 6 and OSC2/CLKOUT pin 7) short and symmetric, with the load capacitors placed within 2 mm of each pin and a ground guard ring around the oscillator cell. Route the ICD lines RB6/PGC (pin 24) and RB7/PGD (pin 25) away from switching nodes to prevent debug-session glitches. If using the ADC, dedicate AGND and AVSS ties to a star-ground point near pin 16 to minimize digital switching noise coupling into analog readings.
Do not assume 5 V tolerance on pins when running the part at 3.3 V - all I/O are rated to VDD, so a 5 V signal into a 3.3 V part will exceed the absolute maximum. Always check the configuration bits for oscillator mode (HS vs XT vs RC) before programming, since the PIC16LF737 defaults differ from the PIC16F737 datasheet revision. For in-circuit programming, ensure LVP (RB3/PGM pin 23) is pulled to ground through a resistor when unused, or the part will refuse to enter run mode after programming.
The 10-bit ADC achieves datasheet accuracy only when the acquisition time is configured for the source impedance of the input signal - sample at least 10 us for 10 kOhm sources. Use the internal VREF+ module rather than VDD as the ADC reference when VDD is noisy, especially in motor-control applications. Decouple the VREF pin (RA3/AN3) with 100 nF if it is enabled, and avoid routing ADC inputs near PWM outputs to minimize capacitive coupling.
Compliance Information
ROHS3 compliant per Microchip product page and IC components distributor listing. Not AEC-Q100 qualified - this is an industrial-grade MCU. For automotive applications, consider AEC-Q100-qualified PIC16F equivalents.
