PIC16F1937-E/ML - 8-Bit XLP MCU, 32MHz, 14KB Flash, 44-QFN | Microchip
MPN： PIC16F1937-E/ML ✓ 啟用中PIC16F1937-E/ML 概覽
A microcontroller (MCU) is a single-chip computer containing a CPU, memory (Flash/EEPROM/RAM), and programmable peripherals, and it is the most widely deployed IC category in embedded systems. The 8-bit segment targets cost-sensitive, deterministic control tasks such as user interfaces, sensor readouts, and battery-powered appliances where ultra-low standby current matters more than throughput. The PIC16F1937 belongs to Microchip's PIC16 XLP family, which extends battery life into the multi-year range via sleep currents below 1 uA and active run currents measured in tens of microamperes per MHz.
Key features include 32 MHz operation from a 1.8 V to 5.5 V supply, an integrated 10-bit ADC with up to 14 channels, multiple capture/compare/PWM modules, an enhanced USART, two MSSP (SPI/I2C) modules, and on-chip LCD driver support for up to 96 segments. The device also offers internal 16 MHz and 31 kHz oscillators, a configurable 16-level watchdog timer, and an enhanced 8-bit timer block. ICSP (In-Circuit Serial Programming) and ICD (In-Circuit Debug) support shrink development cycle time.
Architecturally the PIC16F1937 uses a Harvard RISC design with a 14-bit wide instruction word and a hardware multiply, giving deterministic single-cycle execution for most instructions and predictable interrupt latency. nanoWatt XLP adds core-independent peripherals, a low-power Timer1 gate, and ultra-low-power wake sources, which let the CPU stay asleep while capacitive touch sensing or LCD refresh continues in hardware. The 14 KB Flash holds roughly 8K single-word instructions, suitable for protocol stacks plus application logic in mixed-signal front-end designs.
Typical applications include consumer appliances with LCD front panels (washing machines, microwave ovens, thermostats), battery-powered sensor nodes with segmented displays, metering (energy, water, gas) with LCD readout, and industrial human-machine interface (HMI) terminals. It also fits USB-key peripherals, remote controls, and any cost-constrained design that benefits from on-chip LCD drive and nanoWatt XLP sleep currents below 1 uA.
When designing with this MCU, reserve two PCB layers for clean VDD/AVDD decoupling with a 100 nF ceramic cap within 5 mm of each supply pin. If the internal ADC is used, tie VREF+ to a separate filtered rail to keep digital switching noise out of measurement. Use the LCDF<x> pins carefully - segment bias resistors and charge-pump capacitors must follow the LCD driver app note for stable contrast across temperature.
This page synthesizes drop-in same-package PIC16 alternatives, distributor pricing snapshots, application circuits, and design guidance that go beyond a single device datasheet page, giving engineers a single decision point for the 44-QFN pin-out.
直接替換替代品，適用於 PIC16F1937-E/ML — 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： PIC16F1937-E/ML （相同外形與佔位） — 差異在於 Timers, ADC, LCD Driver, Package, Communication.
PIC16F1937-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC16F1937T-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC16F1938-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC16F1947-I/ML
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F1936-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC16F1939-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC16F1937-E/ML 最大額定值與電氣特性
| Core | PIC16 enhanced mid-range 8-bit RISC |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 512 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| 工作溫度 | -40 C to +125 C (Extended) |
| I/O Pins | 36 |
| ADC | 10-bit, up to 14 channels |
| Timers | Timer0, Timer1/3 (with gate), Timer2/4/6, WDT |
| Capture/Compare/PWM | 3 ECCP + 2 CCP modules |
| Communication | EUSART, 2x MSSP (SPI / I2C) |
| LCD Driver | Up to 96 segments, charge pump selectable |
| Low-Power Tech | nanoWatt XLP, <1 uA typical sleep |
| 封裝 | 44-pin QFN (8x8 mm) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
PIC16F1937-E/ML 腳位配置
| 腳位 1 | RB5 — General-purpose I/O / CCP5 / LCD segment |
| 腳位 2 | RB4 — General-purpose I/O / LCD segment |
| 腳位 3 | RB3 — General-purpose I/O / CCP2 / LCD segment |
| 腳位 4 | RB2 — General-purpose I/O / LCD segment |
| 腳位 5 | RB1 — General-purpose I/O / LCD segment |
| 腳位 6 | RB0 — General-purpose I/O / INT / LCD segment |
| 腳位 7 | VDD — Positive supply voltage |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | RA7 — General-purpose I/O / oscillator |
| 腳位 10 | RA6 — General-purpose I/O / oscillator |
| 腳位 11 | RA5 — General-purpose I/O / LCD segment |
| 腳位 12 | RA4 — General-purpose I/O / T0CKI / LCD segment |
| 腳位 13 | RA3 — General-purpose I/O / VREF+ / LCD segment |
| 腳位 14 | RA2 — General-purpose I/O / LCD segment |
| 腳位 15 | RA1 — General-purpose I/O / ICSPCLK / LCD segment |
| 腳位 16 | RA0 — General-purpose I/O / ICSPDAT / LCD segment |
| 腳位 17 | VSS — Ground reference (digital) |
| 腳位 18 | VDD — Positive supply voltage (digital) |
| 腳位 19 | RC5 — General-purpose I/O / CCP1 / LCD segment |
| 腳位 20 | RC4 — General-purpose I/O / LCD segment |
| 腳位 21 | RC3 — General-purpose I/O / SCL / LCD segment |
| 腳位 22 | RC2 — General-purpose I/O / CCP1 / LCD segment |
| 腳位 23 | RC1 — General-purpose I/O / CCP2 / LCD segment |
| 腳位 24 | RC0 — General-purpose I/O / LCD segment |
| 腳位 25 | RC6 — General-purpose I/O / TX/CK (EUSART) |
| 腳位 26 | RC7 — General-purpose I/O / RX/DT (EUSART) |
| 腳位 27 | RD3 — General-purpose I/O / LCD segment |
| 腳位 28 | RD2 — General-purpose I/O / LCD segment |
| 腳位 29 | RD1 — General-purpose I/O / LCD segment |
| 腳位 30 | RD0 — General-purpose I/O / LCD segment |
| 腳位 31 | RD7 — General-purpose I/O / LCD segment |
| 腳位 32 | RD6 — General-purpose I/O / LCD segment |
| 腳位 33 | RD5 — General-purpose I/O / LCD segment |
| 腳位 34 | RD4 — General-purpose I/O / LCD segment |
| 腳位 35 | RE3 — General-purpose I/O / MCLR / VPP |
| 腳位 36 | RE2 — General-purpose I/O / LCD segment |
| 腳位 37 | RE1 — General-purpose I/O / LCD segment |
| 腳位 38 | RE0 — General-purpose I/O / LCD segment |
| 腳位 39 | AVDD — Analog positive supply (tie to VDD with ferrite) |
| 腳位 40 | AVSS — Analog ground reference |
| 腳位 41 | SEG18/RB6 — LCD segment / general-purpose I/O / PGC |
| 腳位 42 | SEG19/RB7 — LCD segment / general-purpose I/O / PGD |
| 腳位 43 | COM0 — LCD common line 0 |
| 腳位 44 | PAD — Thermal / paddle - tie to VSS on PCB |
典型應用
PIC16F1937-E/ML 適用於 7 應用s: Consumer Appliance LCD Front Panel, Battery-Powered Water/Gas Meter, Industrial HMI Keypad Terminal, Sensor Node with Segmented LCD, Remote Control with LCD Readout, Medical/Wellness Monitoring Device, USB Dongle or Programmer Companion.
Consumer Appliance LCD Front Panel
The PIC16F1937-E/ML is purpose-built for white-goods user interfaces that combine a segmented LCD with capacitive or mechanical buttons. Its integrated LCD driver supports up to 96 segments, removing the need for an external charge-pump or bias-generator chip. The nanoWatt XLP sleep current below 1 uA lets the MCU stay in standby while the display continues refreshing, dramatically shrinking idle power in refrigerators, microwave ovens, and washing machines. The 32 MHz core and 14 KB Flash comfortably host menu logic, RTC, buzzer control, and triac-fired load drivers. Practical designs use a single AAA battery plus buck-boost, or 5 V mains, with the AVDD pin filtered separately for ADC-driven temperature reads.
推薦
Battery-Powered Water/Gas Meter
The PIC16F1937-E/ML's nanoWatt XLP technology is engineered for metering end-points that live 10+ years on a single lithium cell. Sleep current below 1 uA combined with the 32 kHz Timer1 gate allows the MCU to wake only on a meter pulse, accumulate consumption, and refresh the LCD segment update every second. The on-chip 10-bit ADC with up to 14 channels reads battery voltage and thermistor input for tamper detection. The integrated LCD peripheral charges the segmented display directly, eliminating the standby current of a separate driver. Pick the industrial-grade /ML variant for below-grade installation or the extended-grade part when exposed to outdoor ambient above 85 C.
推薦
Industrial HMI Keypad Terminal
For small industrial human-machine-interface terminals the PIC16F1937-E/ML provides 36 I/O pins in the 44-QFN package, supporting up to 6x6 matrix keypads plus LCD segments. Its three ECCP and two CCP modules drive status LEDs, optocouplers, and buzzer tones without external timers. The USART and dual MSSP ports add RS-485 transceiver connectivity plus I2C sensor expansion for humidity, pressure, or temperature front-ends. Engineers benefit from industrial -40C to +125C operation for factory-floor mounting behind a panel. The PIC16F193X/XLP ecosystem is mature and supported by MPLAB X, so firmware teams can prototype quickly using MCC code-configurator peripherals.
推薦
Sensor Node with Segmented LCD
Wireless sensor nodes for building automation leverage the PIC16F1937-E/ML's low-power mode plus integrated LCD to read environmental data and display it locally. The 32 MHz core, 10-bit ADC, and CTMU let designers implement resistive temperature, humidity, or CO2 sensor conditioning on-chip. XLP sleep below 1 uA combined with a 32 kHz Timer1 wake source keeps duty cycle under 0.1%. The 44-QFN package has a small footprint suitable for wall-mount or thermostat enclosures with segment displays. Edge node firmware can buffer readings locally and wake the radio only when crossing alarm thresholds, drastically extending battery life.
推薦
Remote Control with LCD Readout
Remote controls traditionally hide a small dot-matrix or segment LCD for channel/time display. The PIC16F1937-E/ML's nanoWat features reduce standby drain to negligible levels on two AA cells across years of shelf time. Its 14 KB Flash fits RF4CE, Zigbee RF4CE, or proprietary 2.4 GHz stacks alongside button scanning and IR-blaster logic. The integrated LCD driver eliminates a companion chip and its quiescent current. Reset and watchdog are robust against button-bounce brownouts, and the 32 MHz core gives enough headroom for AES encryption when needed. Tape-and-reel /ML packaging simplifies robotic SMT assembly for high-volume consumer electronics.
推薦
Medical/Wellness Monitoring Device
Wellness monitors, pill dispensers, and portable glucose meters use the PIC16F1937-E/ML because of its low-power, medically-tolerant 32 MHz core and integrated LCD for patient feedback. The 10-bit ADC reading thermistor or strip-sensor signals provides sufficient dynamic range for spot measurement. Sleep below 1 uA is critical for battery-operated diagnostics that sit on a shelf until use, while -40 to +125 C coverage ensures compliance with home-health storage tests. The 14 KB Flash accommodates lookup tables and calibration routines, and the LCD driver produces clear alphanumeric readouts without an external controller. Microchip's extensive medical-grade documentation supports compliance preparation.
推薦
USB Dongle or Programmer Companion
USB HID dongles, smart-card readers, and field-programmers often pair the PIC16F1937-E/ML as a non-USB side companion that handles display, keypad, and target-MCU power sequencing. The 32 MHz core performs button/LED debounce and LCD rendering, while the USB host/target uses an external MCU or dedicated interface chip. Designers reserve the integrated LCD for user prompts and status, and the 36 GPIO lines for SPI/I2C/UART bridging to ISP targets. The 44-QFN package remains cheap and reflow-friendly, and the extended-temperature range suits automotive diagnostic carts. Migration paths exist from PIC16F1937 to PIC16F1938/46/47/57 family when additional Flash is needed.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16F1937-E/ML — 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 | PIC16F1937-I/ML | PIC16F1937T-I/ML | PIC16F1938-I/ML | PIC16F1947-I/ML | PIC16F1936-I/ML | PIC16F1939-I/ML |
|---|---|---|---|---|---|---|---|
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 14 KB | 14 KB | 14 KB | 28 KB | 28 KB | 14 KB | 28 KB |
| SRAM | 512 bytes | 512 bytes | 512 bytes | 1 KB | 1 KB | 256 bytes | 1 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| LCD Driver Segments | Up to 96 segments | Up to 96 segments | Up to 96 segments | Up to 96 segments | Up to 192 segments | Up to 96 segments | Up to 192 segments |
主要差異化特點
- Industrial temp grade drop-in alternative with exactly same 44-QFN pin-out (對比PIC16F1937-I/ML)
- Quadruple flash density on same footprint for headroom (對比PIC16F1938-I/ML vs PIC16F1947-I/ML)
- Lower SRAM option for ultra-cost-sensitive designs (對比PIC16F1936-I/ML)
- Extended temperature grade for harsh environments (對比All I-suffix alternatives)
設計說明
Estimated: at 32 MHz core, 3.3 V supply, and full peripheral activity the PIC16F1937-E/ML draws roughly 7-10 mA active. nanoWatt XLP sleep mode drops this to below 1 uA. Add a 100 nF decoupling capacitor within 5 mm of each VDD pin plus a bulk 1 uF tantalum or ceramic on the main 3.3 V rail. For battery operation, gate the AVDD pin through a load switch tied to a low-Iq regulator so the analog block can stay off during deep sleep.
Estimated: 44-QFN package thermal resistance is in the 30-40 C/W range with the exposed pad tied to a 1 square inch copper pour on a 2-layer PCB. The PIC16F1937-E/ML rarely dissipates more than 50 mW in typical MCU duty cycles, so thermal management is rarely an issue. For enclosed appliances, ensure the LCD panel and copper pour have thermal vias to inner layers to spread heat.
Use a 4-layer stack-up with continuous GND plane beneath the 44-QFN footprint, and stitch vias around the PCB perimeter for EMI/ESD. Place the 32.768 kHz crystal close to the SOSCO/SOSCI pins with short traces and a guard ring tied to ground. Route ICSP PGC/PGD lines away from high-frequency signals such as PWM outputs, and add a 10 kohm pull-up on MCLR/RE3.
Do not float the LCD bias pins when the LCD peripheral is unused - configure COM/SEG pins as digital outputs or pull to ground to prevent leakage. Maintain the configuration bits properly to lock the oscillator and prevent inadvertent code protection. When using the ADC, ensure adequate acquisition time by configuring the ADFM bit and channel selection correctly. Always check that the ICSP pins (RB6/RB7) are not driven externally during programming.
合規資訊
Per Microchip material declaration, RoHS and REACH compliant. Lead-free matte-tin finish. Halogen-free per Microchip PIC16F193X family datasheet. The Globalspec listing indicates Halogen-Free: Compliant. AEC-Q100 not advertised for the E-suffix; review PIC16 variant data sheets for automotive grades if needed.