PIC16LF1933-I/SO - 8-bit XLP MCU 7KB Flash 28-SOIC | Microchip
MPN: PIC16LF1933-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.45 | $14.50 |
| 100 | $1.2 | $120.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.92 | $920.00 |
PIC16LF1933-I/SO Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data memory, and integrated peripherals such as timers, ADC, communications interfaces, and I/O. The PIC16LF1933 is a low-voltage 'LF' variant of the PIC16F1933 family, optimized for operation down to 1.8 V. Within the broader taxonomy it sits under 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. Its enhanced mid-range 16-bit instruction word architecture delivers 200 ns instruction execution, while XLP technology typically achieves nanoWatt sleep currents below 50 nA in Real-Time Clock/Calendar mode.
Key features include the integrated LCD driver with charge pump supporting up to 96 segments, a 10-bit ADC with up to 17 channels, multiple communication peripherals (EUSART, MSSP for SPI/I2C), and up to 25 digital I/O pins. The 32 MHz internal oscillator and 4x PLL simplify designs by eliminating external crystals in many applications. The -I industrial temperature grade supports -40 °C to +85 °C operation.
Architecturally, the device combines a Harvard RISC core with on-chip Flash program memory, allowing in-circuit self-programming. The internal oscillator block with PLL enables 32 MHz CPU operation without external components, while the LCD module integrates voltage doubler/tripler charge pump and dedicated RAM.
Typical applications include battery-powered metering, low-power sensor nodes with LCD displays, home appliances with user interfaces, portable medical monitors, and industrial control panels. The wide 1.8 V to 5.5 V range permits direct operation from single-cell Li-ion, two-cell AA, or regulated 3.3 V / 5 V rails.
When designing with this device, ensure the configuration bits are set correctly for the chosen oscillator mode, and provide adequate decoupling (100 nF ceramic plus bulk capacitance) near the VDD pins. For LCD operation, the charge pump capacitors must follow the datasheet's typical values, and unused segment pins should be left open per Microchip guidelines.
This page synthesizes distributor pricing, drop-in alternatives, application circuits, and practical design notes not collected together in the manufacturer datasheet.
Drop-in alternatives for PIC16LF1933-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 PIC16LF1933-I/SO (same form factor and footprint) — differing in LCD Driver, Package, ADC, Timers, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1933-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1933-I/SS
✅ Drop-In✓ In Stock
$1.3 / Unit
View Datasheet →PIC16LF1933-I/ML
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F1933-I/SO
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →PIC16LF1933T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1933-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1933-I/SO Maximum Ratings & Electrical Characteristics
| Family | PIC® XLP™ 16F |
| Core | 8-bit PIC RISC (enhanced mid-range) |
| Program Memory Size | 7 KB (4K x 14) Flash |
| RAM Size | 256 B |
| EEPROM Size | 256 B |
| Maximum CPU Speed | 32 MHz |
| Instruction Cycle | 200 ns at 20 MHz (4x PLL to 32 MHz) |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C (Industrial) |
| Package | 28-pin SOIC (SO) |
| Mounting Type | Surface Mount |
| I/O Pins | Up to 25 |
| ADC | 10-bit, up to 17 channels |
| LCD Driver | Integrated, up to 96 segments with charge pump |
| Communication Interfaces | 1x EUSART, 1x MSSP (SPI/I2C) |
| Timers | 4x 8/16-bit timers |
| Internal Oscillator | 31 kHz LF + 16 MHz HF, 4x PLL |
| XLP Sleep Current | Low-power nanoWatt XLP technology |
| MSL Level | MSL1 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
PIC16LF1933-I/SO Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Pin 2 | RA5 — Port A bit 5 / digital I/O / ICSPDAT |
| Pin 3 | RA4 — Port A bit 4 / digital I/O |
| Pin 4 | RA3 — Port A bit 3 / digital I/O / MCLR (with config) |
| Pin 5 | RC5 — Port C bit 5 / digital I/O |
| Pin 6 | RC4 — Port C bit 4 / digital I/O |
| Pin 7 | RC3 — Port C bit 3 / digital I/O / SCL (MSSP) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RC2 — Port C bit 2 / digital I/O |
| Pin 10 | RC1 — Port C bit 1 / digital I/O |
| Pin 11 | RC0 — Port C bit 0 / digital I/O |
| Pin 12 | RA2 — Port A bit 2 / analog input / digital I/O |
| Pin 13 | RA1 — Port A bit 1 / analog input / digital I/O |
| Pin 14 | RA0 — Port A bit 0 / analog input / digital I/O |
| Pin 15 | RB7 — Port B bit 7 / digital I/O |
| Pin 16 | RB6 — Port B bit 6 / digital I/O / ICSPCLK |
| Pin 17 | RB5 — Port B bit 5 / digital I/O / LCD SEG |
| Pin 18 | RB4 — Port B bit 4 / digital I/O / LCD SEG |
| Pin 19 | RB3 — Port B bit 3 / digital I/O / LCD SEG |
| Pin 20 | RB2 — Port B bit 2 / digital I/O / LCD SEG |
| Pin 21 | RB1 — Port B bit 1 / digital I/O / LCD SEG |
| Pin 22 | RB0 — Port B bit 0 / digital I/O / interrupt-on-change |
| Pin 23 | RD7 — Port D bit 7 / digital I/O / LCD SEG |
| Pin 24 | RD6 — Port D bit 6 / digital I/O / LCD SEG |
| Pin 25 | RD5 — Port D bit 5 / digital I/O / LCD SEG |
| Pin 26 | RD4 — Port D bit 4 / digital I/O / LCD SEG |
| Pin 27 | RD3 — Port D bit 3 / digital I/O / LCD SEG |
| Pin 28 | VSS — Ground reference |
Typical Applications
PIC16LF1933-I/SO is suitable for 6 applications: Battery-Powered Utility Metering, Low-Power Sensor Nodes with LCD, Home Appliance User Interfaces, Portable Medical Monitors, Industrial Control Panels, Consumer Remote Controls with LCD.
Battery-Powered Utility Metering
The PIC16LF1933-I/SO's XLP nanoWatt technology delivers typical sleep current below 50 nA while the integrated LCD driver and Real-Time Clock remain active, enabling decade-long battery life in gas/water/electricity meters. Operating from 1.8 V to 5.5 V supports single-cell Li-ion or 2x AA cells. The 96-segment LCD controller with internal charge pump displays kWh readings without external bias supplies; the 10-bit ADC with 17 channels handles multiple sensor inputs (temperature, current shunt, tamper detection). Compared to PIC16F1933, the LF variant extends operation below the 2.3 V threshold, critical when AA cells drop to ~1.9 V at end of discharge.
Recommended
Low-Power Sensor Nodes with LCD
Remote sensor nodes (temperature/humidity/co) benefit from the PIC16LF1933-I/SO's XLP sleep currents plus integrated 96-segment LCD that displays readings directly without external display drivers. The 32 MHz core with 4x PLL and 8 MIPS handles data smoothing and RF packetization before returning to sleep. The 256 B EEPROM stores calibration constants, and the 17-channel 10-bit ADC accommodates multi-sensor PCBs. Compared to discrete LCD + MCU solutions, the integrated approach shrinks BOM by 2-3 ICs and reduces PCB area by ~30%.
Recommended
Home Appliance User Interfaces
Washing machines, dishwashers, and microwave ovens use the PIC16LF1933-I/SO to drive multi-segment LCD displays, scan capacitive keypads, and control BLDC or relay-driven actuators. The integrated charge pump simplifies LCD backplane generation even at 3.3 V, while 25 I/O pins handle segmented UI plus motor/gate-driver enable signals. Compared to PIC16LF1825, the PIC16LF1933 trades communications richness for the LCD peripheral, ideal for consumer white goods where a display is the primary HMI.
Recommended
Portable Medical Monitors
Blood-glucose meters, pulse oximeters, and digital thermometers leverage the PIC16LF1933-I/SO's wide 1.8 V to 5.5 V supply range and XLP sleep currents to operate from coin-cell or AAA batteries. The 10-bit ADC digitizes thermistor/photodiode signals; the LCD displays measurement results and battery status. Compared to ASIC-only designs, the programmable MCU allows feature iteration and FDA submission updates. The -40 °C to +85 °C industrial range covers home and clinical environments.
Recommended
Industrial Control Panels
Industrial HMI panels use the PIC16LF1933-I/SO to drive segment LCDs for parameter display, read analog inputs from 4-20 mA sensors, and communicate with PLCs via RS-485 (EUSART) or I2C sensor buses (MSSP). The 256 B EEPROM stores user-configurable setpoints that survive power cycles. The industrial -40 °C to +85 °C grade tolerates factory floor environments. Compared to discrete logic designs, the integrated MCU with LCD controller and ADC reduces PCB complexity and BOM cost by approximately 25%.
Recommended
Consumer Remote Controls with LCD
Premium AV remotes and smart thermostats use the PIC16LF1933-I/SO to drive multi-segment LCDs that show temperature, volume, and menu state, while reading capacitive buttons and IR/Sub-GHz receiver signals. The 32 MHz core and 8 MIPS handle Sub-GHz protocol decoding; the 256 B EEPROM stores paired device IDs. The XLP sleep current extends coin-cell battery life beyond 5 years compared to typical 1-2 years for non-XLP MCUs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1933-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1933-I/SP | PIC16LF1933-I/SS | PIC16LF1933-I/ML | PIC16F1933-I/SO | PIC16LF1933T-I/SO | PIC16LF1933-E/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SPDIP | 28-SSOP | 28-QFN | 28-SOIC - same | 28-SOIC - same (T&R) | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Minimum Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 2.3 V | 1.8 V | 1.8 V |
| Maximum CPU Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB |
| RAM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C | -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) |
| Price (qty 1, USD) | 1.65 | 1.75 | 1.55 | 1.85 | 1.65 | 1.65 | 2.10 |
Key Differentiators
- Integrated 96-segment LCD driver with charge pump eliminates external bias IC (vs PIC16LF1825-I/SL)
- 1.8 V minimum supply enables single-cell Li-ion and depleted-AA operation (vs PIC16F1933-I/SO)
- XLP nanoWatt technology extends battery life to 5+ years in metering (vs PIC16LF1847-I/ML)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 1) and a bulk capacitor (e.g., 10 µF) on the same supply trace. The PIC16LF1933 draws very low current during sleep (<50 nA with LCD enabled per XLP datasheet figures), so the VDD rail can drop rapidly under load transients - ensure the bulk capacitor is sized to handle peak active-mode current bursts up to ~10 mA at 32 MHz. Estimated: 100 nF + 10 µF gives sufficient margin for a 32 MHz active mode transient. Do not exceed 5.5 V VDD or device damage will occur.
Route ICSPCLK (RB6) and ICSPDAT (RA5) signals to a dedicated 6-pin ICSP header for programming/debug access. The 28-SOIC is not breadboard-friendly, so the ICSP header is essential for development. Keep MCLR/RA3 routing short to avoid noise coupling that could trigger unintended resets - tie MCLR to VDD via a 10 kΩ resistor and 100 nF capacitor for hardware reset circuit. The exposed pad on 28-QFN (ML) variant must be soldered to VSS plane for thermal dissipation.
Critical configuration bit settings include the oscillator mode (INTOSC with PLL for 32 MHz), WDT enable/disable, code protection, and MCLR pin function. Many failed PIC16LF1933 designs result from incorrect CONFIG1/CONFIG2 settings - refer to Microchip datasheet Section 4.0 (Configuration Bits). When using the LCD peripheral, the charge pump capacitors (typically 0.1 µF on LCDC1-LCDC3 pins) must be installed, and unused segment pins should be left open per datasheet Section 22.0.
For EUSART RS-485 communication at high baud rates (>115200 bps), add a 100 Ω series termination at the MCU TX pin to dampen reflections on the bus. For MSSP I2C, install pull-up resistors (typically 4.7 kΩ at 100 kHz or 2.2 kΩ at 400 kHz) on SCL/SDA lines - the PIC16LF1933 I/O pins are open-drain only on the MSSP peripheral. For SPI, route CLK and MOSI traces as a matched-length differential pair to avoid setup/hold violations at 8 MHz SCK.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - automotive applications should consider PIC16F1933-E/SO with AEC-Q100 documentation. Halogen-free per MSL1 packaging. Pin /SO variant is lead-free (Pb-free) and matte-tin plated.
