PIC16LF19156T-I/SO - 28KB Flash XLP LCD MCU | Microchip
MPN: PIC16LF19156T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.18 | $3.18 |
| 10 | $2.86 | $28.60 |
| 100 | $2.55 | $255.00 |
| 500 | $2.29 | $1,145.00 |
| 1,000 | $2.04 | $2,040.00 |
PIC16LF19156T-I/SO Overview
An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU, program memory, RAM, and peripherals on a single die. Within the broader taxonomy, the PIC16LF19156 sits in the PIC16 family -> 8-bit PIC microcontroller -> microcontroller -> semiconductor. Its "LF" prefix denotes the eXtreme Low-Power (XLP) variant optimized for battery and energy-harvesting applications, while the F (Flash) suffix indicates in-circuit re-programmable Flash program memory.
Key features include 32 MHz operation from a 1.8V to 3.6V supply, the XLP sleep mode with nanoWatt technology, 36 digital I/O pins, integrated LCD charge pump for bias generation, and direct memory access. The 28-pin SOIC (SO) footprint is the same as the original PIC16F19xx baseline, providing a migration path for engineers already designing with that package.
Typical applications include battery-powered LCD thermostats, IoT sensor nodes with display readouts, wearable medical monitors, industrial human-machine interface (HMI) panels, and metering products. The 256-byte EEPROM supports persistent settings storage across power cycles, while the integrated RTCC simplifies real-time clock implementations in metering and scheduling products.
When designing with this device, place a 100 nF decoupling capacitor adjacent to each VDD pin and a bulk 1uF-10uF tantalum or ceramic cap on the main supply rail. The LCD charge pump output capacitors should be rated for the maximum segment load and follow the manufacturer reference layout from TB3131 and the PIC16F19156 datasheet. For migration from PIC16LF19155 (56KB/32KB), check that your program code fits within 28KB Flash.
This page synthesizes distributor pricing, drop-in same-package alternatives from Microchip's PIC16 family, and practical design notes not found in the manufacturer datasheet summary, all verified as of 2026-09-25.
Drop-in alternatives for PIC16LF19156T-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 PIC16LF19156T-I/SO (same form factor and footprint) — differing in ADC, Package, Comparators, LCD Driver, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF19155-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.19 / Unit
View Datasheet →PIC16F19156-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.45 / Unit
View Datasheet →PIC16LF19156-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF19156-E/SO
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16LF19155-E/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF1906-I/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.36 / Unit
View Datasheet →PIC16LF19156T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 enhanced mid-range |
| Family | PIC16F191xx (XLP) |
| Program Memory (Flash) | 28 KB (16K x 14) |
| Data SRAM | 2 KB |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| Operating Temperature Range | -40 C to +85 C (Industrial, "I") |
| Digital I/O Pins | 36 (varies by package) |
| Package | 28-pin SOIC (SO) |
| ADC | 12-bit ADC2 |
| DAC | 5-bit and 8-bit DAC |
| Comparators | Low-power comparators |
| LCD Driver | Integrated with charge pump |
| Timers/PWM | CCP, PWM, CWG, SMT |
| Special Peripherals | ZCD, PPS, RTCC |
| MSL Level | 1 |
| Mounting Type | Surface Mount |
PIC16LF19156T-I/SO 28-pin soic (so) Pin Configuration Guide
Pin configuration for PIC16LF19156T-I/SO (28-pin soic (so) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC16LF19156T-I/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC16LF19156T-I/SO is suitable for 6 applications: Battery-Powered LCD Thermostat, IoT Sensor Node with LCD Readout, Wearable Medical Monitor, Industrial HMI Panel Controller, Smart Energy Meter with LCD Display, Consumer Appliance Control Board.
Battery-Powered LCD Thermostat
The PIC16LF19156T-I/SO is ideally suited for battery-powered LCD thermostats due to its integrated LCD driver with charge pump and XLP nanoWatt technology. The 12-bit ADC2 accurately reads thermistor or RTD sensors with 0.1C resolution, while the on-chip charge pump generates LCD bias from a 1.8V-3.6V battery stack without external boost components. XLP sleep currents in the nanoampere range enable 5-10 year battery life on 2x AA cells with weekly LCD refresh.
Recommended
IoT Sensor Node with LCD Readout
For IoT sensor nodes with local LCD readouts, the PIC16LF19156T-I/SO provides 32 MHz CPU throughput for periodic sensor acquisition and LCD refresh while spending most of its time in deep sleep. The 12-bit ADC2 captures up to 16 analog channels for multi-sensor designs, and PPS simplifies PCB routing by remapping peripherals to any I/O pin. The integrated RTCC timestamps events and triggers scheduled wake-ups for energy-efficient duty cycling.
Recommended
Wearable Medical Monitor
Wearable medical monitors benefit from the PIC16LF19156T-I/SO's XLP technology, small 28-pin SOIC footprint, and integrated 12-bit ADC2. The low-power comparator enables hardware-based threshold detection that wakes the CPU only when vitals cross alarm limits, minimizing active-mode power. The 2KB RAM supports small data buffers for pulse-oximetry or ECG peak detection, while the RTCC logs timestamped events for compliance audit trails.
Recommended
Industrial HMI Panel Controller
The PIC16LF19156T-I/SO serves as an efficient HMI panel controller in industrial equipment, driving segment LCDs for status display while the host PLC or microcontroller handles main control loops. The ZCD (Zero-Cross Detect) and PWM peripherals support AC phase-control for dimming or triac driving, while the CCP and CWG modules generate complementary PWM outputs for motor and solenoid control. Industrial -40C to +85C operation covers factory-floor environments.
Recommended
Smart Energy Meter with LCD Display
Smart energy meters and water/gas meters use the PIC16LF19156T-I/SO for LCD-driven consumption display and persistent data logging in EEPROM. The 256-byte EEPROM stores calibration coefficients and tamper flags, the RTCC provides time-of-use billing timestamps, and the 12-bit ADC2 measures analog front-end signals from current transformers. XLP sleep modes allow years of operation from a single lithium primary cell.
Recommended
Consumer Appliance Control Board
Consumer appliances including washing machines, dishwashers, and microwave ovens use the PIC16LF19156T-I/SO for user-interface LCD control and basic appliance logic. The integrated LCD driver eliminates external display drivers, reducing BOM cost, and the CWG (Complementary Waveform Generator) and PWM modules drive brushed and brushless DC loads directly. The 5-bit/8-bit DAC generates analog reference voltages for sensor excitation.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF19156T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF19155-I/SO | PIC16F19156-I/SO | PIC16LF19156-I/SO | PIC16LF19156-E/SO |
|---|---|---|---|---|---|
| Package | 28-pin SOIC (SO) | 28-pin SOIC (SO) - same | 28-pin SOIC (SO) - same | 28-pin SOIC (SO) - same | 28-pin SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 28 KB | 32 KB | 28 KB | 28 KB | 28 KB |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Temperature Range | -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 |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| LCD Driver | Yes (with charge pump) | Yes (with charge pump) | Yes (with charge pump) | Yes (with charge pump) | Yes (with charge pump) |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
Key Differentiators
- 28KB Flash at lower cost than 32KB sibling (vs PIC16LF19155-I/SO)
- Lower-voltage XLP variant vs F variant (vs PIC16F19156-I/SO)
- Industrial vs Extended temperature range (vs PIC16LF19156-E/SO)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD pin and a 10 uF bulk capacitor on the main supply rail. The PIC16LF19156 XLP technology achieves nanoampere-level sleep currents, so any leakage from capacitor selection (avoid high-leakage tantalum in parallel with ceramics) will degrade battery life. Use X7R or X5R ceramics rated 6.3V or higher for low DC bias shift.
Route the LCD segment and common lines away from high-frequency switching signals to minimize coupling noise. Use a ground plane beneath the SOIC footprint to reduce EMI and provide a low-impedance return path for the LCD charge pump switching currents. Keep the C1/C2 charge pump capacitors within 5mm of their assigned pins to avoid efficiency loss in the charge pump.
Do not exceed 3.6V on VDD with the PIC16LF19156 LF variant - the F variant (PIC16F19156) supports up to 5.5V. When migrating code from PIC16LF1903 or PIC16LF1847, verify that peripheral libraries are re-targeted because PPS, CWG, and ADC2 register names differ. Always configure unused I/O pins as outputs and tie them to ground to minimize current leakage in sleep mode.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade - not AEC-Q100 qualified; for automotive select PIC16F19156-E/SO (extended temp) or consult Microchip automotive PIC portfolio.
