PIC16LF19156-I/MV - 8-bit XLP MCU 28KB Flash 28-UQFN | Microchip
MPN: PIC16LF19156-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.46 | $14.60 |
| 100 | $1.28 | $128.00 |
| 500 | $1.11 | $555.00 |
| 1,000 | $0.97 | $970.00 |
| 3,000 | $0.86 | $2,580.00 |
PIC16LF19156-I/MV Overview
The PIC microcontroller is an 8-bit Harvard-architecture RISC CPU family pioneered by Microchip; this device belongs to the enhanced mid-range PIC16 core with a 14-bit instruction word and hardware multiplier. Within the broader taxonomy it is a microcontroller (MCU) -> 8-bit MCU -> PIC16 family -> eXtreme Low-Power (XLP) LCD sub-family. Compared with traditional 8051-class MCUs it offers a richer peripheral set, while compared with 32-bit Cortex-M parts it favours deterministic interrupt response and ultra-low sleep current for battery applications.
Key features include eXtreme Low-Power (XLP) operation with sub-uA sleep current, integrated LCD driver with charge pump, Core Independent Peripherals (CIPs) such as CWG, SMT and ZCD, peripheral pin select (PPS) for flexible I/O mapping, and 256 bytes of high-endurance EEPROM for parameter storage. The LF suffix denotes the wide low-voltage range part suited for 1.8 V coin-cell or 2x AA designs, while the non-LF PIC16F19156 supports up to 5.5 V.
The 28-UQFN package provides a compact 4x4 mm footprint with an exposed thermal pad for improved dissipation. CRC/SCAN, Hardware Limit Timer (HLT) and Windowed Watchdog Timer (WWDT) add functional safety features useful in IEC 60730-class white goods. The combination of LCD drive, charge pump and XLP makes the PIC16LF19156 particularly efficient in battery-powered meter and HMI designs.
Typical applications include battery-powered glucose meters and thermostats with LCD readouts, IoT sensor nodes with segmented displays, white-goods HMI panels, portable medical monitors, smart thermostats and e-paper driver boards. The wide 1.8 V-3.6 V range allows direct operation from a single Li coin cell.
When designing with this device, ensure the exposed pad is soldered to a sufficient copper pour for thermal relief and that the PPS mapping is locked after configuration to prevent accidental runtime remapping. Decouple VDD with at least 100 nF plus 1 uF bulk ceramic close to the pins.
This page synthesizes distributor pricing, drop-in package alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16LF19156-I/MV — 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 PIC16LF19156-I/MV (same form factor and footprint) — differing in Comparators, Package, ADC, LCD Driver, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF19155-I/MV
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF19156-E/MV
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →PIC16F19156-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF19056-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF18856-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1789-I/MV
✅ Drop-In✓ In Stock
$2.51 / Unit
View Datasheet →PIC16LF19156-I/MV Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC16F191xx |
| Core | PIC16 (8-bit, 14-bit instruction word, enhanced mid-range) |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| SRAM | 2 KB |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz |
| Supply Voltage (LF variant) | 1.8 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (industrial, -I suffix) |
| Package | 28-pin UQFN (MV) 4x4 mm with exposed pad |
| Mounting Type | Surface Mount |
| ADC | 12-bit ADC2 (multiple channels) |
| DAC | 5-bit DAC |
| LCD Driver | Integrated with charge pump |
| Low-Power Features | eXtreme Low-Power (XLP), sleep < 1 uA |
| Comparators | Low-power comparator (LP COMP) |
| Special Peripherals | PWM, CCP, CWG, SMT, ZCD, PPS, RTCC, HLT, WWDT, CRC/SCAN |
| RoHS Status | Compliant |
PIC16LF19156-I/MV Pin Configuration
| Pin 1 | RA0 — Port A bit 0 / analog / PPS |
| Pin 2 | RA1 — Port A bit 1 / analog / PPS |
| Pin 3 | RA2 — Port A bit 2 / analog / PPS |
| Pin 4 | RA3 — Port A bit 3 / analog / PPS |
| Pin 5 | RA4 — Port A bit 4 / analog / PPS |
| Pin 6 | RA5 — Port A bit 5 / analog / PPS |
| Pin 7 | RA6 — Port A bit 6 / PPS |
| Pin 8 | RA7 — Port A bit 7 / PPS |
| Pin 9 | VSS — Ground |
| Pin 10 | RB0 — Port B bit 0 / PPS |
| Pin 11 | RB1 — Port B bit 1 / PPS |
| Pin 12 | RB2 — Port B bit 2 / PPS |
| Pin 13 | RB3 — Port B bit 3 / PPS |
| Pin 14 | RB4 — Port B bit 4 / PPS |
| Pin 15 | RB5 — Port B bit 5 / PPS |
| Pin 16 | RB6 — Port B bit 6 / PPS |
| Pin 17 | RB7 — Port B bit 7 / PPS |
| Pin 18 | VDD — Positive supply (1.8 V-3.6 V) |
| Pin 19 | RC0 — Port C bit 0 / PPS |
| Pin 20 | RC1 — Port C bit 1 / PPS |
| Pin 21 | RC2 — Port C bit 2 / PPS |
| Pin 22 | RC3 — Port C bit 3 / PPS / SDA |
| Pin 23 | RC4 — Port C bit 4 / PPS / SCL |
| Pin 24 | RC5 — Port C bit 5 / PPS |
| Pin 25 | RC6 — Port C bit 6 / PPS / TX |
| Pin 26 | RC7 — Port C bit 7 / PPS / RX |
| Pin 27 | RE3 — MCLR / digital only |
| Pin 28 | EP — Exposed pad (connect to VSS for thermal relief) |
Typical Applications
PIC16LF19156-I/MV is suitable for 7 applications: Battery-Powered Glucose Meter with LCD, Smart Thermostat with Segmented LCD, Portable IoT Sensor Node with LCD Readout, White Goods HMI Control Board, Wireless Thermometer / Weather Station Remote Unit, Medical Dosing Pump Controller, Industrial Process Indicator.
Battery-Powered Glucose Meter with LCD
The PIC16LF19156-I/MV fits battery-powered glucose meters because its eXtreme Low-Power (XLP) sleep current below 1 uA preserves coin-cell life across 1.8 V-3.6 V operation, while the integrated 12-bit ADC2 reads the strip photo-current accurately. The built-in LCD driver with charge pump drives 4-MUX segmented displays directly from the CR2032 cell without external boost components. PPS remaps ADC, PWM and comparator pins to free up I/O for the strip connector. Firmware fits comfortably in the 28 KB Flash and uses the 256-byte EEPROM to store calibration curves and last-measurement history.
Recommended
Smart Thermostat with Segmented LCD
The PIC16LF19156-I/MV suits smart thermostats thanks to its 1.8 V-3.6 V LF supply and integrated LCD driver with charge pump, eliminating external LCD bias components. The 32 MHz core executes proportional control loops while the SMT (Signal Measurement Timer) handles capacitive touch buttons without CPU load. CWG (Complementary Waveform Generator) and PWM channels drive TRIAC or relay actuators directly. HLT and WWDT add IEC 60730-class safety, and 256-byte EEPROM retains setpoints across power cycles for up to 1 M erase/write cycles.
Recommended
Portable IoT Sensor Node with LCD Readout
The PIC16LF19156-I/MV is well-suited for portable IoT sensor nodes that need an on-board segmented display, thanks to its sub-uA XLP sleep current, 32 MHz core, and 2 KB SRAM that handles sensor processing and LCD refresh between deep-sleep cycles. The integrated 12-bit ADC2 reads up to dozens of analog sensors while the RTCC keeps time-based wakeups accurate to seconds over years on a coin cell. PPS allows flexible pin mapping so the same PCB supports different sensor daughterboards, and 256-byte EEPROM stores node identity, calibration, and last-known-good configuration.
Recommended
White Goods HMI Control Board
The PIC16LF19156-I/MV is appropriate for white-goods HMI boards (washing machines, dishwashers, ovens) due to its CRC/SCAN, Hardware Limit Timer (HLT) and Windowed Watchdog Timer (WWDT), which together support IEC 60730 functional-safety compliance for Class B appliances. The LCD driver with charge pump runs segmented displays from 3.3 V, while multiple PWM, CCP and CWG channels drive triacs, relays and buzzers. The 32 MHz CPU and 2 KB SRAM are enough for capacitive touch via SMT plus state-machine user-interface logic. EEPROM stores user preferences and fault history across power cycles.
Recommended
Wireless Thermometer / Weather Station Remote Unit
The PIC16LF19156-I/MV matches remote thermometer and weather-station units because its XLP sleep current under 1 uA and RTCC keep years of battery life on 2x AA cells while periodically waking to read sensors and update an LCD. The 12-bit ADC2 and low-power comparator support thermistor, soil-moisture and pulse-counter interfaces; the 5-bit DAC drives contrast bias on the segmented LCD. PWM channels can also drive an audible beep transducer for alarms. EEPROM stores min/max history and calibration, and PPS lets the PCB assign sensor pins without re-spin.
Recommended
Medical Dosing Pump Controller
The PIC16LF19156-I/MV fits medical dosing pumps where deterministic 8-bit performance, IEC 60730 safety peripherals and a segmented LCD matter more than raw throughput. The 12-bit ADC2 senses pressure or flow, the LP comparator detects occlusion, and the CWG/PWM generate precise motor-drive waveforms for the peristaltic pump head. WWDT and HLT enforce class-B self-test at every boot. EEPROM stores dosage logs and calibration, and XLP sleep preserves battery during standby between doses, with the LF 1.8 V-3.6 V supply operating directly from 2x alkaline cells.
Recommended
Industrial Process Indicator
The PIC16LF19156-I/MV serves industrial 4-20 mA loop-powered process indicators because its wide 1.8 V-3.6 V supply range handles the headroom of a current-loop shunt, while the 12-bit ADC2 reads the loop signal with 1 mA/bit resolution after scaling. The on-chip charge pump drives a segmented LCD at low VDD without external bias, and the PWM/CCP generate excitation for 2-wire RTD or thermistor bridges. RTCC timestamps logged events into EEPROM for later retrieval via serial. PPS lets the same board service multiple sensor input types by remapping peripheral pins in firmware.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF19156-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF19155-I/MV | PIC16LF19156-E/MV | PIC16F19156-I/MV | PIC16LF19056-I/MV | PIC16LF18856-I/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-UQFN (MV) 4x4 mm | 28-UQFN (MV) 4x4 mm - same | 28-UQFN (MV) 4x4 mm - same | 28-UQFN (MV) 4x4 mm - same | 28-UQFN (MV) 4x4 mm - same | 28-UQFN (MV) 4x4 mm - same |
| Program Memory (Flash) | 28 KB | 14 KB | 28 KB | 28 KB | 14 KB | 28 KB |
| Supply Voltage Range | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 2.3 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) |
| Operating Temperature | -40 C to +85 C (-I) | -40 C to +85 C | -40 C to +125 C (-E) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| LCD Driver with Charge Pump | Yes | Yes | Yes | Yes | Yes (smaller segment count) | Yes |
| CWG / SMT / ZCD Peripherals | Yes (CIPs) | Yes | Yes | Yes | Partial / fewer CIPs | Partial (older core) |
| RoHS / Lead-Free | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Largest Flash in UQFN-28 (MV) XLP family (vs PIC16LF19155-I/MV)
- Extended temperature grade option (vs PIC16LF19156-I/MV)
- LF low-voltage operation with full LCD charge pump (vs PIC16F19156-I/MV)
- Modern CIP peripheral set (CWG, SMT, ZCD) in UQFN-28 (vs PIC16LF18856-I/MV)
Design Notes
The UQFN-28 (MV) package requires a continuous ground copper pour beneath the exposed pad (EP) and thermal vias (typically 5-9 vias of 0.3 mm drill) stitching EP to the inner ground plane for both thermal dissipation and reliable reflow soldering. Place at least one 100 nF 0402 ceramic plus one 1 uF-4.7 uF bulk ceramic within 2 mm of the VDD pin and one 100 nF cap on AVdd if used. Estimate: a 4-layer 1 oz copper ground pour yields theta_JA below 40 C/W, adequate for the 5 mA active current at 32 MHz.
For battery-powered designs, configure the unused peripherals through the PMD (Peripheral Module Disable) registers and run the CPU from the 32 kHz LFINTOSC during sleep wakeups to minimise active current. According to the Microchip PIC16F191xx datasheet, XLP sleep with RTCC can reach sub-1 uA typical at 1.8 V. Use IOC (Interrupt-on-Change) on a wake pin instead of polling to keep the MCU in sleep until an event occurs. Estimated: with a CR2032 (220 mAh) and 1 uA average draw, theoretical battery life exceeds 20 years.
Do not assume PPS (Peripheral Pin Select) defaults - every digital peripheral (UART, SPI, I2C, PWM, CWG) must be explicitly assigned through the PPS registers at startup or it remains disconnected. Lock PPS configuration with PPSLOCK to prevent accidental runtime remapping. Always configure the MCLR pin (RE3) either as MCLR (with 10 kohm pull-up) or as digital input only - leaving it floating causes erratic resets. Do not exceed the absolute maximum VDD of 3.6 V for the LF variant even in transient spikes.
For long LCD segment traces, route VDD and segment signals away from PWM outputs and triac drive traces to avoid capacitive coupling that causes ghosting on the display. Use guard traces or increased spacing between LCD bias networks and switching nodes. Enable the LCD charge pump only when needed (during display updates) and bypass its output with a 1 uF ceramic; this keeps the LCD bias rail clean during deep-sleep cycles.
Compliance Information
RoHS/REACH compliant per Microchip product page. Not AEC-Q100 qualified (consumer/industrial grade); choose PIC16F19156 or automotive-grade variant if required.
