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PIC16F1937-I

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Microchip Tech Microcontrollers (MCU/MPU/SOC), TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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PIC16F1937-I

Microchip Tech · Microcontrollers (MCU/MPU/SOC) · TQFP-44(10x10)

PIC16F1937-I from Microchip Tech, in a TQFP-44(10x10). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 RC7 bidirectional General purpose I/O RC7, also EUSART asynchronous receive RX and synchronous data DT, and LCD analog output SEG8.
2 RD4 bidirectional General purpose I/O RD4, also capacitive sensing input CPS12, PWM output P2D, and LCD analog output SEG17.
3 RD5 bidirectional General purpose I/O RD5, also capacitive sensing input CPS13, PWM output P1B, and LCD analog output SEG18.
4 RD6 bidirectional General purpose I/O RD6, also capacitive sensing input CPS14, PWM output P1C, and LCD analog output SEG19.
5 RD7 bidirectional General purpose I/O RD7, also capacitive sensing input CPS15, PWM output P1D, and LCD analog output SEG20.
6 VSS power_in Ground reference.
7 VDD power_in Positive supply.
8 RB0 bidirectional General purpose I/O RB0 with individually controlled interrupt-on-change and individually enabled pull-up, also external interrupt INT, SR latch input SRI, A/D channel AN12, capacitive sensing input CPS0, and LCD analog output SEG0.
9 RB1 bidirectional General purpose I/O RB1 with individually controlled interrupt-on-change and individually enabled pull-up, also A/D channel AN10, comparator negative input C12IN3-, capacitive sensing input CPS1, and LCD analog input VLCD1.
10 RB2 bidirectional General purpose I/O RB2 with individually controlled interrupt-on-change and individually enabled pull-up, also A/D channel AN8, capacitive sensing input CPS2, and LCD analog input VLCD2.
11 RB3 bidirectional General purpose I/O RB3 with individually controlled interrupt-on-change and individually enabled pull-up, also A/D channel AN9, comparator negative input C12IN2-, capacitive sensing input CPS3, CCP2/P2A output (pin function selectable via APFCON), and LCD analog input VLCD3.
12 NC unconnected Not connected; no function is assigned to this pin in the pin diagram.
13 NC unconnected Not connected; no function is assigned to this pin in the pin diagram.
14 RB4 bidirectional General purpose I/O RB4 with individually controlled interrupt-on-change and individually enabled pull-up, also A/D channel AN11, capacitive sensing input CPS4, and LCD analog output COM0.
15 RB5 bidirectional General purpose I/O RB5 with individually controlled interrupt-on-change and individually enabled pull-up, also A/D channel AN13, capacitive sensing input CPS5, Timer1 gate input T1G, CCP3/P3A (pin function selectable via APFCON), and LCD analog output COM1.
16 RB6 bidirectional General purpose I/O RB6 with individually controlled interrupt-on-change and individually enabled pull-up, also ICSP serial programming clock ICSPCLK, in-circuit debug clock ICDCLK, and LCD analog output SEG14.
17 RB7 bidirectional General purpose I/O RB7 with individually controlled interrupt-on-change and individually enabled pull-up, also ICSP data I/O ICSPDAT, in-circuit debug data ICDDAT, and LCD analog output SEG13.
18 RE3 input General purpose input RE3, or Master Clear MCLR with internal pull-up, or programming voltage VPP (high-voltage programming).
19 RA0 bidirectional General purpose I/O RA0, also A/D channel AN0, comparator C1/C2 negative input C12IN0-, comparator C2 output C2OUT, SR latch inverting output SRNQ, slave select input SS (C2OUT, SRNQ and SS selectable via APFCON), filter capacitor VCAP (PIC16F1934/6/7 only), and LCD analog output SEG12.
20 RA1 bidirectional General purpose I/O RA1, also A/D channel AN1, comparator C1/C2 negative input C12IN1-, and LCD analog output SEG7.
21 RA2 bidirectional General purpose I/O RA2, also A/D channel AN2, A/D negative voltage reference input VREF-, comparator C2 positive input C2IN+, voltage reference output DACOUT, and LCD analog output COM2.
22 RA3 bidirectional General purpose I/O RA3, also A/D channel AN3, A/D positive voltage reference input VREF+, comparator C1 positive input C1IN+, and LCD analog output SEG15.
23 RA4 bidirectional General purpose I/O RA4, also comparator C1 output C1OUT, capacitive sensing input CPS6, Timer0 clock input T0CKI (Schmitt Trigger), SR latch non-inverting output SRQ, and LCD analog output SEG4.
24 RA5 bidirectional General purpose I/O RA5, also A/D channel AN4, comparator C2 output C2OUT, capacitive sensing input CPS7, SR latch inverting output SRNQ, slave select input SS, filter capacitor VCAP (PIC16F1934/6/7 only), and LCD analog output SEG5.
25 RE0 bidirectional General purpose I/O RE0, also A/D channel AN5, CCP3/P3A PWM function (pin function selectable via APFCON), and LCD analog output SEG21.
26 RE1 bidirectional General purpose I/O RE1, also A/D channel AN6, PWM output P3B, and LCD analog output SEG22.
27 RE2 bidirectional General purpose I/O RE2, also A/D channel AN7, CCP5 capture/compare/PWM, and LCD analog output SEG23.
28 VDD power_in Positive supply.
29 VSS power_in Ground reference.
30 RA7 bidirectional General purpose I/O RA7, also crystal/resonator input OSC1 (LP, XT, HS modes), external clock input CLKIN (EC mode), and LCD analog output SEG2.
31 RA6 bidirectional General purpose I/O RA6, also crystal/resonator output OSC2 (LP, XT, HS modes), FOSC/4 output CLKOUT, filter capacitor VCAP (PIC16F1934/6/7 only), and LCD analog output SEG1.
32 RC0 bidirectional General purpose I/O RC0, also Timer1 oscillator output T1OSO, Timer1 clock input T1CKI, and PWM output P2B (pin function selectable via APFCON).
33 NC unconnected Not connected; no function is assigned to this pin in the pin diagram.
34 NC unconnected Not connected; no function is assigned to this pin in the pin diagram.
35 RC1 bidirectional General purpose I/O RC1, also Timer1 oscillator input T1OSI, CCP2 capture/compare/PWM and PWM output P2A (pin function selectable via APFCON).
36 RC2 bidirectional General purpose I/O RC2, also CCP1 capture/compare/PWM, PWM output P1A, and LCD analog output SEG3.
37 RC3 bidirectional General purpose I/O RC3, also SPI clock SCK, I2C clock SCL (open-drain), and LCD analog output SEG6.
38 RD0 bidirectional General purpose I/O RD0, also capacitive sensing input CPS8 and LCD analog output COM3.
39 RD1 bidirectional General purpose I/O RD1, also capacitive sensing input CPS9 and CCP4 capture/compare/PWM.
40 RD2 bidirectional General purpose I/O RD2, also capacitive sensing input CPS10 and PWM output P2B.
41 RD3 bidirectional General purpose I/O RD3, also capacitive sensing input CPS11, PWM output P2C, and LCD analog output SEG16.
42 RC4 bidirectional General purpose I/O RC4, also SPI data input SDI, I2C data I/O SDA (open-drain), Timer1 gate input T1G, and LCD analog output SEG11.
43 RC5 bidirectional General purpose I/O RC5, also SPI data output SDO and LCD analog output SEG10.
44 RC6 bidirectional General purpose I/O RC6, also EUSART asynchronous transmit TX, synchronous clock CK, and LCD analog output SEG9.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-44(10x10)
Category Embedded Processors & Controllers
Pins 44

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Ambient temperature under bias TA -40 125 °C 379
Storage temperature TSTG -65 150 °C 379
Voltage on VDD with respect to VSS VDD -0.3 6.5 V 379
Voltage on VCAP pin with respect to VSS VCAP -0.3 4 V 379
Voltage on MCLR with respect to VSS VMCLR -0.3 9 V 379
Voltage on all other pins with respect to VSS VPIN -0.3 V Printed maximum is (VDD + 0.3V) 379
Maximum current out of VSS pin IVSS 255 mA -40°C ≤ TA ≤ +85°C for industrial; footnote says for 28-pin devices 379
Maximum current into VDD pin IVDD 170 mA -40°C ≤ TA ≤ +85°C for industrial; footnote says for 28-pin devices 379
Clamp current IK 20 mA VPIN < 0 or VPIN > VDD 379
Maximum output current sunk by any I/O pin IOL 25 mA 379
Maximum output current sourced by any I/O pin IOH 25 mA 379
Thermal resistance junction to ambient, 44-pin TQFP θJA 46 °C/W 44-pin TQFP package 392
Thermal resistance junction to case, 44-pin TQFP θJC 14.5 °C/W 44-pin TQFP package 392
Maximum junction temperature TJMAX 150 °C 392
Supply voltage VDD (PIC16F, FOSC ≤ 16 MHz) VDD 1.8 5.5 V FOSC ≤ 16 MHz 382
Supply voltage VDD (PIC16F, FOSC ≤ 32 MHz) VDD 2.3 5.5 V FOSC ≤ 32 MHz (Note 2: PLL required for 32 MHz) 382
RAM data retention voltage VDR 1.7 V Device in Sleep mode 382
VDD rise rate to ensure internal POR signal SVDD 0.05 V/ms See Section 6.1 382
Fixed Voltage Reference voltage for ADC VADFVR -8 6 % 1.024V, VDD ≥ 2.5V; 2.048V, VDD ≥ 2.5V; 4.096V, VDD ≥ 4.75V 382
Fixed Voltage Reference voltage for Comparator and DAC VCDAFVR -11 7 % 1.024V, VDD ≥ 2.5V; 2.048V, VDD ≥ 2.5V; 4.096V, VDD ≥ 4.75V 382
Fixed Voltage Reference voltage for LCD bias VLCDFVR -11 10 % 3.072V, VDD ≥ 3.6V 382
External clock input frequency, EC high-power mode FOSC 20 MHz EC Oscillator mode (high); printed minimum is DC 394
Oscillator frequency, HS mode FOSC 1 20 MHz HS Oscillator mode, VDD > 2.7V 394
Oscillator frequency, XT mode FOSC 0.1 4 MHz XT Oscillator mode 394
Internal calibrated HFINTOSC frequency tolerance HFOSC -2 2 % 0°C ≤ TA ≤ +60°C, VDD ≥ 2.5V 395
Internal calibrated HFINTOSC frequency tolerance HFOSC -3 3 % 60°C ≤ TA ≤ 85°C, VDD ≥ 2.5V 395
Internal calibrated HFINTOSC frequency tolerance HFOSC -5 5 % -40°C ≤ TA ≤ +125°C 395
MCLR pulse width (low) TMCL 2 µs 399
Low-power watchdog timer time-out period TWDTLP 10 16 27 ms VDD = 3.3V-5V; 1:16 prescaler used 399
Power-up Timer period, PWRTE = 0 TPWRT 40 65 140 ms PWRTE = 0 399
Brown-out Reset voltage, BORV = 2.5V VBOR 2.38 2.5 2.73 V BORV = 2.5V 399
Brown-out Reset voltage, BORV = 1.9V VBOR 1.8 1.9 2.11 V BORV = 1.9V 399
Brown-out Reset hysteresis VHYST 0 25 60 mV -40°C to +85°C 399
Brown-out Reset DC response time TBORDC 1 3 35 µs VDD ≤ VBOR 399
FOSC to CLKOUT OS11 70 ns VDD = 3.3-5.0V 397
FOSC to CLKOUT OS12 72 ns VDD = 3.3-5.0V 397
PLL oscillator frequency range F10 4 8 MHz 395
On-chip VCO system frequency F11 16 32 MHz 395
PLL start-up time (lock time) F12 2 ms 395
CLKOUT stability (jitter) F13 -0.25 0.25 % 395
Integral error EIL -1.7 1.7 LSb VREF = 3.0V 401
Offset error EOFF -2.5 2.5 LSb VREF = 3.0V 401
Reference voltage VREF 1.8 V VREF = (VREF+ minus VREF-); printed maximum is VDD 401
A/D clock period TAD 1 9 µs TOSC-based 401
Recommended impedance of analog voltage source ZAIN 10 kΩ Can go higher if external 0.01µF capacitor is present on input pin 401
Comparator input offset voltage CM01 VIOFF -60 60 mV High-Power mode; typical printed as ±7.5 mV 403
Comparator response time rising edge TRESP 400 800 ns High-Power mode 403
Comparator response time falling edge TRESP 200 400 ns High-Power mode 403
Comparator mode change to output valid TMC2OV 10 µs Characterized, not tested 403
DAC settling time CST 10 µs DACR<4:0> transitions from 0000 to 1111 403
Synchronous transmit clock high to data-out valid TCKH2DTV 80 ns 3.0-5.5V 404
Synchronous transmit clock high to data-out valid TCKH2DTV 100 ns 1.8-5.5V 404
Data-hold before CK (DT hold time) TDTV2CKL 10 ns SYNC RCV (Master and Slave) 404
Data-hold after CK (DT hold time) TCKL2DTL 15 ns SYNC RCV (Master and Slave) 404
Timer1 oscillator input frequency range FT1 32.4 32.768 33.1 kHz Oscillator enabled by setting T1OSCEN 400
Output low voltage, I/O ports VOL 0.6 V IOL = 8mA, VDD = 5V; IOL = 6mA, VDD = 3.3V; IOL = 1.8mA, VDD = 1.8V 389
Input leakage current, I/O ports IIL -5 5 nA VSS ≤ VPIN ≤ VDD, pin at high-impedance @ 85°C 389

CAD (KiCad official)

  • Symbol: PIC16F1937-I
  • Footprint: Package_QFP:TQFP-44_10x10mm_P0.8mm
  • 3D model: TQFP-44(10x10) (KiCad packages3D, STEP)
  • 3D model files: pic16f1937-i-etched.step / pic16f1937-i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); pic16f1937-i.step / pic16f1937-i.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (472 pp, sha256 9250c7993972a4aa, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF