PIC16F1937-I/ML - 8-Bit MCU 14KB Flash LCD XLP | Microchip
MPN: PIC16F1937-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.62 | $3.62 |
| 10 | $3.26 | $32.60 |
| 100 | $2.81 | $281.00 |
| 500 | $2.42 | $1,210.00 |
| 1,000 | $2.18 | $2,180.00 |
PIC16F1937-I/ML Overview
An 8-bit microcontroller (MCU) is a compact, self-contained computing element that integrates a CPU, memory (Flash/ROM, RAM, EEPROM), peripherals, and I/O on a single silicon die. Within the broader semiconductor hierarchy, an MCU sits under microcontroller -> embedded processor -> semiconductor device. The 8-bit class targets cost-sensitive, low-power applications where deterministic performance and modest code/memory footprints are sufficient. Compared with 16-bit and 32-bit MCUs, 8-bit devices typically offer lower unit cost, simpler toolchains, and superior energy efficiency per MIPS, at the expense of computational throughput. The PIC16F1937 specifically adds an LCD segment driver, making it attractive for human-machine interface (HMI) products powered by small batteries.
Key features include an operating voltage range of 1.8 V to 5.5 V (2.3 V to 5.5 V per the official Mouser description), 25 I/O lines, 11 ADC channels with 10-bit resolution, multiple timers (Timer0/1/2/4/6), Enhanced Universal Synchronous/Asynchronous Receiver Transmitter (EUSART), Master Synchronous Serial Port (MSSP) for SPI/I2C, and a built-in LCD driver supporting up to 192 segments. nanoWatt XLP technology delivers typical sleep currents below 50 nA, enabling multi-year coin-cell operation in metering, remote controls, and IoT edge nodes.
The architecture is built on Microchip's enhanced mid-range 8-bit core with a hardware multiplier and a 14-bit instruction word. The Harvard-style bus separates program and data paths, while the integrated LCD charge pump eliminates the need for an external bias voltage generator. This combination is ideal for applications where PCB area, BOM count, and quiescent current are tightly constrained.
Typical applications include battery-powered consumer products with segmented LCD displays (thermostats, white-goods control panels, kitchen scales), industrial sensor and metering nodes, home-automation keypads and remote controls, low-end medical devices such as glucose meters, and automotive interior modules (HVAC controls, instrument cluster indicators). The integrated LCD peripheral removes the need for an external driver IC.
When designing with this device, place the 44-pin QFN thermal pad on a continuous ground pour with at least 16 thermal vias to limit junction temperature rise. Use low-ESR ceramic bypass capacitors on VDD and AVSS, and follow Microchip application note AN1267 (LCD PCB layout) to avoid segment contrast artefacts.
This page synthesizes verified distributor pricing, drop-in alternatives, application-specific design notes, and an FAQ block optimized for AI search engines - offering information not bundled on any single manufacturer or distributor page.
Drop-in alternatives for PIC16F1937-I/ML — 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 PIC16F1937-I/ML (same form factor and footprint) — differing in Package, Timers, Communication, LCD Driver, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1936-I/ML
✅ Drop-In✓ In Stock
$2.15 / Unit
View Datasheet →PIC16F1934-I/ML
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC16F1937-E/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1937-I/MV
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.41 / Unit
View Datasheet →PIC16F18877-I/PT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.18 / Unit
View Datasheet →PIC16F1937-I/ML Maximum Ratings & Electrical Characteristics
| Device Family | PIC16F193x |
| Core | 8-bit PIC enhanced mid-range |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data RAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage Range | 2.3 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 11 channels x 10-bit |
| Timers | Timer0, Timer1, Timer2, Timer4, Timer6 |
| Communication | 1x EUSART, 1x MSSP (SPI / I2C) |
| LCD Driver | Yes, up to 192 segments with integrated charge pump |
| Low-Power Technology | nanoWatt XLP |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 44-lead QFN (8x8 mm), Industrial grade |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F1937-I/ML Pin Configuration
| Pin 1 | SEG18 — LCD segment output 18 |
| Pin 2 | SEG19 — LCD segment output 19 |
| Pin 3 | SEG20 — LCD segment output 20 |
| Pin 4 | SEG21 — LCD segment output 21 |
| Pin 5 | SEG22 — LCD segment output 22 |
| Pin 6 | SEG23 — LCD segment output 23 |
| Pin 7 | VDD — Positive supply voltage |
| Pin 8 | SEG24 — LCD segment output 24 |
| Pin 9 | SEG25 — LCD segment output 25 |
| Pin 10 | SEG26 — LCD segment output 26 |
| Pin 11 | SEG27 — LCD segment output 27 |
| Pin 12 | RA0/AN0 — Digital I/O / ADC input |
| Pin 13 | RA1/AN1 — Digital I/O / ADC input |
| Pin 14 | RA2/AN2 — Digital I/O / ADC input |
| Pin 15 | RA3/AN3 — Digital I/O / ADC input |
| Pin 16 | RA4/AN4 — Digital I/O / ADC input |
| Pin 17 | RA5/AN5 — Digital I/O / ADC input |
| Pin 18 | RA6 — Digital I/O |
| Pin 19 | RA7 — Digital I/O |
| Pin 20 | VSS — Ground reference |
| Pin 21 | RF7 — Digital I/O |
| Pin 22 | RF6 — Digital I/O |
| Pin 23 | RF5 — Digital I/O |
| Pin 24 | RF4 — Digital I/O |
| Pin 25 | RF3 — Digital I/O |
| Pin 26 | RF2 — Digital I/O |
| Pin 27 | RF1 — Digital I/O |
| Pin 28 | RF0 — Digital I/O |
| Pin 29 | AVSS — Analog ground |
| Pin 30 | AVDD — Analog positive supply |
| Pin 31 | RE0/AN6 — Digital I/O / ADC input |
| Pin 32 | RE1/AN7 — Digital I/O / ADC input |
| Pin 33 | RE2/AN8 — Digital I/O / ADC input |
| Pin 34 | RE3/MCLR — Reset (active-low) / digital I/O |
| Pin 35 | RC0 — Digital I/O |
| Pin 36 | RC1 — Digital I/O |
| Pin 37 | RC2 — Digital I/O |
| Pin 38 | RC3 — Digital I/O |
| Pin 39 | RC4 — Digital I/O |
| Pin 40 | RC5 — Digital I/O |
| Pin 41 | RC6 — Digital I/O |
| Pin 42 | RC7 — Digital I/O |
| Pin 43 | RB7 — Digital I/O |
| Pin 44 | EP — Exposed thermal pad - connect to VSS |
Typical Applications
PIC16F1937-I/ML is suitable for 6 applications: Battery-Powered Thermostat HMI, White-Goods Control Panel (Washer / Refrigerator), Industrial Sensor / Metering Node, Remote Control with LCD Status Display, Home-Automation Keypad, Low-End Medical / Wellness Device.
Battery-Powered Thermostat HMI
The PIC16F1937-I/ML is purpose-built for segmented-LCD thermostats that run for years on two AA cells. Its integrated LCD driver supports up to 192 segments - enough for set-point, day-of-week, fan speed, and mode indicators - without an external bias IC, while the nanoWatt XLP sleep current below 50 nA extends battery life. The 14 KB Flash holds full week-day scheduling logic, the 512 B RAM buffers sensor samples, and the 11-channel 10-bit ADC reads NTC temperature directly. Placed on the same PCB as a 32.768 kHz crystal for RTC, the PIC16F1937 streams temperature via EUSART to a wireless module on demand. The 44-pin QFN's exposed thermal pad keeps junction temperature in spec even when the LCD charge pump runs continuously. Compared with discrete MCU + LCD bias IC designs, the PIC16F1937 saves BOM cost and PCB area - critical for wall-mount thermostats with limited depth.
Recommended
White-Goods Control Panel (Washer / Refrigerator)
White-goods control panels need a rugged, low-cost MCU driving an LCD with cycle, temperature, and status segments. The PIC16F1937-I/ML's 25 I/O and 11 ADC channels directly read keypad rows, water level sensors, NTC thermistors, and motor speed feedback, while the integrated LCD peripheral drives the main display without an external driver. The 2.3-5.5 V supply range handles rectified 5 V and 12 V systems through a simple LDO. The 32 MHz instruction clock lets the firmware debounce keypads, run a PI control loop for motor speed, and refresh the LCD at 64 Hz without CPU strain. The 256-byte EEPROM stores user-set cycles and error logs that survive power loss. Industrial-grade /ML parts operate reliably in the hot ambient of a refrigerator compressor bay or the steam-prone interior of a washing machine. Compared with 32-bit Cortex parts, the PIC16F1937 reduces system cost by 40-60%.
Recommended
Industrial Sensor / Metering Node
Industrial IoT sensor nodes require long battery life, periodic measurement, and LCD readout for local display. The PIC16F1937-I/ML's nanoWatt XLP core combined with its 11-channel 10-bit ADC and integrated LCD makes it ideal for flow meters, gas meters, and pressure transmitters. Sleep current below 50 nA means a single lithium primary cell can power the node for 10+ years with hourly wake-ups. The 14 KB Flash accommodates MODBUS RTU or wireless-M-Bus protocol stacks, while the 512 B RAM buffers instantaneous measurements. The MSSP peripheral provides SPI for an external sensor interface and I2C for an external EEPROM or RTC. Industrial-grade /ML parts operate over -40C to +85C, suiting outdoor meter cabinets. Compared with 32-bit Cortex-M0 nodes, the PIC16F1937 halves average active current while keeping the BOM simple.
Recommended
Remote Control with LCD Status Display
Universal remote controls and AV-system keypads benefit from the PIC16F1937-I/ML's low power, integrated LCD, and IR-capable timers. The 32 MHz instruction clock and Timer1 (16-bit with gate control) accurately generate 38 kHz IR carrier and decode RC5/RC6/SIRC protocols. The integrated LCD shows source, volume, and battery status without an external driver, reducing BOM cost. Sleep current below 50 nA extends coin-cell battery life to 1-3 years. The 14 KB Flash supports full code pages for multiple device libraries, and the 512 B RAM stores learn-mode IR codes. The 44-pin QFN footprint is small enough to fit behind a 7-segment-style LCD window. Compared with discrete 8-bit 8051 designs, the PIC16F1937 delivers higher MIPS per mW and simpler toolchain integration via MPLAB X IDE.
Recommended
Home-Automation Keypad
Z-Wave, Zigbee, or proprietary home-automation keypads use the PIC16F1937-I/ML as a low-power front-end MCU with LCD status display. The 25 I/O directly drive 4x4 keypad matrices, multiple LEDs, and an EUSART link to a wireless transceiver. The 11-channel ADC reads ambient light for automatic LCD backlight control. nanoWatt XLP keeps idle consumption below 50 nA, enabling battery-powered wall switches. The integrated LCD driver (up to 192 segments) shows zone, temperature, and alarm status locally. The 14 KB Flash accommodates custom UI logic and OTA-bootloader stubs. Compared with 32-bit Cortex-M0 front-ends, the PIC16F1937 cuts BOM cost by 30-50% and reduces firmware complexity for keypad-only applications.
Recommended
Low-End Medical / Wellness Device
Blood-pressure cuffs, glucose meters, and digital thermometers benefit from the PIC16F1937-I/ML's combination of LCD driver, ADC, and low power. The 11-channel 10-bit ADC reads pressure, blood-glucose test strip impedance, or thermopile voltage. The integrated LCD shows systolic/diastolic readings or temperature values without an external driver, shrinking BOM cost in single-use disposables. nanoWat XLP enables months of standby on AAA cells. The 14 KB Flash accommodates FDA-style firmware logging in the 256-byte EEPROM. Industrial-grade /ML parts suit ambient temperatures in clinical or home settings. Compared with low-end 32-bit MCUs, the PIC16F1937 fits more naturally into segmented-LCD reference designs documented in Microchip's MDD application notes.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1937-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1936-I/ML | PIC16F1934-I/ML | PIC16F1937-E/ML | PIC16F1937-I/MV | PIC16F18877-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-QFN (8x8) | 44-QFN (8x8) | 44-QFN (8x8) | 44-QFN (8x8) | 40-UQFN (5x5) | 44-TQFP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 14 KB | 7 KB | 7 KB | 14 KB | 14 KB | 56 KB |
| RAM | 512 B | 256 B | 256 B | 512 B | 512 B | 4 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 5.5 V |
| I/O Pins | 25 | 25 | 36 | 25 | 36 | 36 |
| LCD Driver | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (up to 192 segments) | Yes (up to 192 segments) | No |
Key Differentiators
- Twice the Flash and RAM of PIC16F1936 in the same 44-QFN footprint (vs PIC16F1936-I/ML)
- Integrated segment LCD driver with charge pump - eliminates external bias IC (vs PIC16F18877-I/PT)
- Drop-in extended-temperature variant available without PCB change (vs PIC16F1937-E/ML)
Design Notes
The 44-pin QFN exposed thermal pad (pin 44) must be soldered to a continuous ground pour with at least 16 thermal vias (0.3 mm drill, 1.0 mm pitch) to limit junction temperature rise. Per Microchip QFN layout guidelines, all signal traces should escape the inner ring without crossing the thermal pad vias. Failure to adequately thermalize the EP will reduce Flash write endurance and accelerate EEPROM wear under industrial temperature stress.
Place a 100 nF decoupling capacitor as close as possible to each VDD/AVDD pair, plus a bulk 1 uF-10 uF ceramic on the main VDD pin. The PIC16F1937's nanoWatt XLP core requires AVDD and VDD to be tied together when the LCD charge pump is unused; if they are split, the absolute maximum rating between AVDD and VDD is 0.3 V unless the LCD is disabled. Battery-powered designs should use a low-Iq LDO such as MCP1700 (1.6 uA quiescent) to avoid erasing the PIC16F1937's sleep-current advantage.
MCLR (pin 34) must be tied to VDD through a 10 kohm pull-up for normal operation; do not leave it floating. The LCD charge pump requires the LCAP pin configuration and a 1 uF external reservoir capacitor on the VLCD pin. When migrating from PIC16F1936 to PIC16F1937, firmware must be rebuilt - the device ID is different and ICD debug IDs do not cross-program. The nanoWatt XLP sleep current spec (<50 nA) is only achievable with all peripherals off and the watchdog disabled.
Compliance Information
Industrial temperature grade per Microchip ordering code /ML. RoHS / REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC16F1937-E/ML for extended temperature only, not for automotive qualification.
