PIC16F1934-E/MV - 7KB Flash, LCD, nanoWatt MCU | Microchip
MPN: PIC16F1934-E/MV β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.88 | $18.80 |
| 100 | $1.65 | $165.00 |
| 500 | $1.42 | $710.00 |
| 1,000 | $1.2 | $1,200.00 |
PIC16F1934-E/MV Overview
An 8-bit microcontroller (MCU) is a small computing system on a single chip that contains a CPU, RAM, non-volatile program memory (Flash/ROM), and peripherals such as timers, ADC, communication ports, and GPIO. Within the broader taxonomy it sits under microcontroller -> embedded processor -> semiconductor. The PIC16F1934 belongs to the mid-range PIC16 family, optimized for ultra-low-power XLP applications such as battery-powered instruments, consumer white goods, and human-machine interfaces that need an integrated LCD glass driver.
Key features include 12 I/O pins shared with LCD segments, an internal 32 MHz oscillator, 10-bit ADC with capacitive touch support (mTouch), multiple PWM/ECCP modules, and hardware Master Synchronous Serial Port (MSSP) for SPI/I2C. Per Microchip datasheet 40001591D, the device includes 256B EEPROM with 1M erase/write cycles endurance and supports ICSP (In-Circuit Serial Programming) for field updates. Active current is typically below 2 mA at 8 MHz, and sleep current drops to roughly 50 nA with LCD charge pump disabled.
Architecturally, the PIC16F1934 uses a 14-bit instruction word RISC core with a hardware multiplier, providing deterministic single-cycle instruction execution. The integrated LCD driver supports up to 96 segments in multiplexed mode (1/4 duty, 1/3 bias) using an internal charge pump that can operate down to 2.5V without external boost components, simplifying display-based designs.
Typical applications include battery-powered thermostats and sensor nodes, low-cost consumer appliances with LCD readouts, irrigation controllers, and any ultra-low-power product that needs an on-chip segmented display. The wide 2.5V-5.5V operating range lets a single coin cell or 2xAA supply power both logic and the display. Design with the integrated LCD charge pump to eliminate external boost circuitry, but verify segment count vs your glass - more than 96 segments requires the larger PIC16F1936/1937/1938/1939 variants.
Drop-in alternatives for PIC16F1934-E/MV β 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 PIC16F1934-E/MV (same form factor and footprint) β differing in ADC, I/O Pins, Package, Operating Temperature, Timers.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F1934-I/MV
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1936-E/MV
β Drop-Inβ In Stock
$1.72 / Unit
View Datasheet βPIC16F1937-E/MV
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18855-I/MV
β Drop-Inβ In Stock
$1.22 / Unit
View Datasheet βPIC16F18854-I/MV
β Drop-Inβ In Stock
$1.18 / Unit
View Datasheet βPIC16F18455-I/MV
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1934-E/MV Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit PIC16 mid-range (14-bit instruction) |
| Program Memory (Flash) | 7 KB |
| RAM | 256 B |
| EEPROM | 256 B |
| CPU Speed | Up to 32 MHz (8 MIPS) |
| Supply Voltage | 2.5 V to 5.5 V |
| I/O Pins | 12 (shared with LCD segments) |
| LCD Driver | Up to 96 segments, 1/4 duty, 1/3 bias, integrated charge pump |
| ADC | 10-bit, capacitive touch (mTouch) capable |
| Timers | 4x 8-bit, 1x 16-bit |
| Communication | MSSP (SPI/I2C), EUSART |
| PWM | ECCP + 2x CCP modules |
| Package | UQFN-40 (MV), 5x5 mm with exposed pad |
| Operating Temperature | -40 C to +125 C (Extended, E suffix) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F1934-E/MV Pin Configuration
| Pin 1 | RE3/MCLR β Digital input / Master Clear (reset) |
| Pin 2 | RA0/AN0/C12IN0-/SEG0 β GPIO / ADC / comparator / LCD segment 0 |
| Pin 3 | RA1/AN1/C12IN1-/SEG1 β GPIO / ADC / comparator / LCD segment 1 |
| Pin 4 | RA2/AN2/C12IN2-/VREF-/SEG2 β GPIO / ADC / Vref- / LCD segment 2 |
| Pin 5 | RA3/AN3/C12IN3+/VREF+/SEG3 β GPIO / ADC / Vref+ / LCD segment 3 |
| Pin 6 | RA4/AN4/CPS0/T0CKI/SEG4 β GPIO / ADC / mTouch / Timer0 clock / LCD segment 4 |
| Pin 7 | RA5/AN5/CPS1/SEG5 β GPIO / ADC / mTouch / LCD segment 5 |
| Pin 8 | RA6/AN6/CPS2/OSC2/SEG6 β GPIO / ADC / mTouch / oscillator out / LCD segment 6 |
| Pin 9 | RA7/AN7/CPS3/OSC1/SEG7 β GPIO / ADC / mTouch / oscillator in / LCD segment 7 |
| Pin 10 | VSS β Ground reference |
| Pin 11 | VDD β Positive supply (2.5V to 5.5V) |
| Pin 12 | RB0/INT/AN12/CPS4/SEG30 β GPIO / external interrupt / ADC / mTouch / LCD segment 30 |
| Pin 13 | RB1/AN10/CPS5/SEG8 β GPIO / ADC / mTouch / LCD segment 8 |
| Pin 14 | RB2/AN8/CPS6/SEG9 β GPIO / ADC / mTouch / LCD segment 9 |
| Pin 15 | RB3/AN9/CPS7/CCP3/SEG10 β GPIO / ADC / mTouch / CCP3 / LCD segment 10 |
| Pin 16 | RB4/AN11/CPS8/SDA/SEG11 β GPIO / ADC / mTouch / I2C data / LCD segment 11 |
| Pin 17 | RB5/AN13/CPS9/SCL/SEG12 β GPIO / ADC / mTouch / I2C clock / LCD segment 12 |
| Pin 18 | RB6/ICSPCLK/SEG13 β GPIO / ICSP clock / LCD segment 13 |
| Pin 19 | RB7/ICSPDAT/SEG14 β GPIO / ICSP data / LCD segment 14 |
| Pin 20 | VSS β Ground reference |
| Pin 21 | VDD β Positive supply (2.5V to 5.5V) |
| Pin 22 | RC0/SOSCO/T1CKI/SEG32 β GPIO / secondary oscillator out / Timer1 clock / LCD segment 32 |
| Pin 23 | RC1/SOSCI/CCP4/SEG33 β GPIO / secondary oscillator in / CCP4 / LCD segment 33 |
| Pin 24 | RC2/CCP2/SEG16 β GPIO / CCP2 / LCD segment 16 |
| Pin 25 | RC3/SEG17 β GPIO / LCD segment 17 |
| Pin 26 | RC4/SEG18 β GPIO / LCD segment 18 |
| Pin 27 | RC5/SEG19 β GPIO / LCD segment 19 |
| Pin 28 | RC6/TX/CK/SEG20 β GPIO / EUSART TX/CK / LCD segment 20 |
| Pin 29 | RC7/RX/DT/SEG21 β GPIO / EUSART RX/DT / LCD segment 21 |
| Pin 30 | VSS β Ground reference |
| Pin 31 | VDD β Positive supply (2.5V to 5.5V) |
| Pin 32 | RD0/CPS16/SEG22 β GPIO / mTouch / LCD segment 22 |
| Pin 33 | RD1/CPS17/CCP5/SEG23 β GPIO / mTouch / CCP5 / LCD segment 23 |
| Pin 34 | RD2/CPS18/SEG24 β GPIO / mTouch / LCD segment 24 |
| Pin 35 | RD3/CPS19/SEG25 β GPIO / mTouch / LCD segment 25 |
| Pin 36 | RD4/CPS20/SEG26 β GPIO / mTouch / LCD segment 26 |
| Pin 37 | RD5/CPS21/SEG27 β GPIO / mTouch / LCD segment 27 |
| Pin 38 | RD6/CPS22/CCP6/SEG28 β GPIO / mTouch / CCP6 / LCD segment 28 |
| Pin 39 | RD7/CPS23/SEG29 β GPIO / mTouch / LCD segment 29 |
| Pin 40 | VSS β Ground reference |
Typical Applications
PIC16F1934-E/MV is suitable for 6 applications: Battery-Powered Thermostat with LCD, Low-Power Sensor Node with Display, Consumer Appliance with LCD Readout, Irrigation Controller, Portable Medical Monitoring Device, Industrial Control Panel Interface.
Battery-Powered Thermostat with LCD
The PIC16F1934-E/MV's integrated 96-segment LCD driver with charge pump and nanoWatt XLP sleep current of approximately 50 nA make it ideal for battery-powered thermostats running from 2xAA cells. The on-chip charge pump generates LCD bias voltages directly from the 2.5V-5.5V supply, eliminating external boost components and reducing BOM cost. Sleep current below 50 nA lets a thermostat run for years on alkaline cells. The 10-bit ADC reads thermistor temperature data, while the LCD shows setpoint and ambient values across up to 96 segments.
Recommended
Low-Power Sensor Node with Display
For IoT sensor nodes that need an on-device LCD readout (e.g., a temperature/humidity monitor), the PIC16F1934-E/MV combines a 10-bit ADC with mTouch capacitive sensing, 256B EEPROM for calibration storage, and an LCD driver that consumes essentially zero extra power. The EUSART and MSSP ports support SPI/I2C sensor expansion. At 8 MHz active current is around 2 mA and sleep with LCD retention is about 50 nA, enabling multi-year battery life. Compared to a discrete LCD charge pump design, this part reduces PCB area by 40-60 percent.
Recommended
Consumer Appliance with LCD Readout
The PIC16F1934-E/MV suits consumer appliances like coffee makers, microwave ovens, and washing-machine front panels that need a segmented LCD readout and capacitive touch buttons. The mTouch-capable ADC channels read up to 12 touch buttons without an external touch controller, and the ECCP/CCP PWM modules directly drive buzzers, triac gates, and LED indicators. The 256B EEPROM stores user settings across power cycles. Industrial-grade 5V tolerance makes it drop-in compatible with 5V legacy appliance designs.
Recommended
Irrigation Controller
The PIC16F1934-E/MV's 12 I/O pins and PWM/CCP outputs make it well suited for multi-zone irrigation controllers driving solenoid valves. The 7 KB Flash and 256B EEPROM store watering schedules and seasonal adjustment factors. EUSART communication enables wired or wireless remote control via RS-485 or a low-cost RF module. With the LCD driver, the controller can show current zone, schedule, and water-usage data on a 96-segment glass without extra display driver ICs, reducing total BOM cost.
Recommended
Portable Medical Monitoring Device
In portable medical devices such as glucose meters, pulse oximeters, or inhaler counters, the PIC16F1934-E/MV delivers ultra-low-power operation and an integrated LCD readout showing measurement results on a custom segment display. The 10-bit ADC reads analog sensor signals with adequate resolution for trend data. Hardware EUSART interfaces with Bluetooth Low Energy modules for data upload. With nanoWatt XLP technology, devices can operate for months on a coin cell while maintaining a clear user interface.
Recommended
Industrial Control Panel Interface
The PIC16F1934-E/MV's extended -40C to +125C temperature range makes it suitable for industrial control panel interfaces with segmented LCD readouts, such as motor drives, HVAC controllers, and process instrumentation. The 12 I/O pins plus MSSP/EUSART provide communication to host PLCs or motor controllers via SPI/I2C/RS-485. The on-chip charge pump supports LCD operation down to 2.5V without a boost circuit, simplifying enclosure design. PWM outputs can directly drive status LEDs and small relays.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1934-E/MV β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1934-I/MV | PIC16F1936-E/MV | PIC16F1937-E/MV | PIC16F18855-I/MV | PIC16F18854-I/MV |
|---|---|---|---|---|---|---|
| Package | UQFN-40 (MV), 5x5 mm | UQFN-40 (MV), 5x5 mm | UQFN-40 (MV), 5x5 mm | UQFN-40 (MV), 5x5 mm | UQFN-40 (MV), 5x5 mm | UQFN-40 (MV), 5x5 mm |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 7 KB | 7 KB | 14 KB | 14 KB | 14 KB | 7 KB |
| RAM | 256 B | 256 B | 512 B | 1 KB | 1 KB | 512 B |
| LCD Driver | 96 segments, integrated charge pump | 96 segments, integrated charge pump | 96 segments, integrated charge pump | 96 segments, integrated charge pump | No LCD driver | No LCD driver |
| Operating Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| Operating Temperature | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| Maximum Clock | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) |
Key Differentiators
- On-chip 96-segment LCD driver with integrated charge pump (vs PIC16F18855-I/MV)
- Same UQFN-40 (MV) footprint across entire family (vs PIC16F1937-E/MV)
- Extended -40C to +125C temperature grade option (vs PIC16F1934-I/MV)
Design Notes
Estimated: At 5V VDD with LCD charge pump enabled and HFINTOSC at 8 MHz, total active current is approximately 2 mA per Microchip datasheet 40001591D. For battery applications, switch to LFINTOSC (31 kHz) during idle periods and use the RTC-like Timer1 with external 32.768 kHz crystal to maintain time-of-day across deep sleep. The integrated LCD charge pump runs from the 2.5V-5.5V supply, eliminating external boost capacitors. Verify decoupling with 100 nF + 10 uF on VDD pins to handle LCD segment switching transients.
The UQFN-40 (MV) 5x5 mm package has an exposed thermal pad that must be soldered to a 2x2 to 3x3 mm copper pad on the PCB for thermal dissipation and electrical ground. Use 4 to 8 thermal vias (0.3 mm drill, 0.5 mm pitch) to connect the EP to an inner ground plane. Place 100 nF decoupling capacitors within 3 mm of each VDD pin (pins 11, 21, 31) and the VSS pins. Keep crystal traces short and surround them with ground pour; for mTouch routing, avoid ground fill under CPS pins to preserve touch sensitivity.
Do not assume the PIC16F1934 is pin-compatible with PIC16F1936/1937 in all cases - the additional Flash/RAM does not change pinout, but verify your linker script accommodates the new memory map. When migrating to PIC16F18855/MV, note that the PIC16F1885x family does NOT include an LCD driver; firmware that drives LCD segments must be rewritten for a different peripheral. The E (extended) suffix denotes -40C to +125C operation; the I (industrial) suffix is only -40C to +85C - choose E for automotive or industrial high-temp designs.
Compliance Information
RoHS compliant per Microchip product page. Extended -40C to +125C temperature grade available in E suffix. PIC16F1934-E/MV is not AEC-Q100 qualified; for AEC-Q100 automotive applications, use PIC16F1934-E/MVVAO automotive part number.
