PIC16LF19156-E/SO - 32MHz 8-bit XLP MCU, 28KB Flash | Microchip
MPN: PIC16LF19156-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.48 | $148.00 |
| 500 | $1.32 | $660.00 |
| 1,000 | $1.18 | $1,180.00 |
PIC16LF19156-E/SO Overview
Background knowledge: A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile working memory (SRAM), data EEPROM and configurable peripherals. PIC16 MCUs use a Harvard architecture with separate program and data buses, a RISC instruction set and a deterministic pipeline, which makes them popular in safety-conscious and low-power embedded designs. The PIC16F/LF191xx family is positioned in Microchip's "Core Independent Peripherals" tier, meaning many peripherals (CLC, CWG, NCO, SMT, ADC with hardware averaging) can operate without CPU intervention, freeing the core for power-saving sleep and extending battery life. This makes the LF19156-E/SO particularly well-suited to mains-battery hybrid devices, IoT end-nodes, metering and any application that must drive a segmented LCD glass directly from the MCU.
Key features include 28 KB self-programmable Flash, 256 bytes of EEPROM, 2 KB SRAM, an integrated charge pump for contrast-stable LCD biasing in low-battery conditions, nanoWatt XLP sleep modes with current in the nanoamp range and PPS for flexible signal routing. The 28-SOIC package brings out up to 24 general-purpose I/O lines and exposes dedicated segment, common, ADC and comparator pins to simplify PCB layout versus smaller QFN variants.
Typical applications include battery-powered metering with segmented LCD display, IoT sensor end-nodes, low-power medical wearables, handheld instruments with local LCD readout, and industrial HMI tiles. For each application, the LF19156-E/SO's combination of LCD drive, low Iq sleep and integrated 12-bit ADC2 reduces the bill of materials versus a discrete MCU-plus-driver-plus-ADC architecture. When designing, choose the LF (1.8V-3.6V) variant for coin-cell or 2xAA battery systems; choose the F (2.3V-5.5V) variant when powered from a 3.3V or 5V rail. Always check the device-specific pin map against the SOIC-28 land pattern and add the recommended decoupling per the manufacturer datasheet's analog/supply pin list.
This page synthesizes distributor pricing, drop-in PIC16LF191xx family alternates, and practical design notes not found on a single manufacturer datasheet.
Drop-in alternatives for PIC16LF19156-E/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 PIC16LF19156-E/SO (same form factor and footprint) — differing in Comparators, Package, ADC, Core Architecture, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF19155-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF19156T-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF19156-E/SP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.21 / Unit
View Datasheet →PIC16LF18456-E/SO
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →PIC16LF19156-E/SO Maximum Ratings & Electrical Characteristics
| Core | PIC16 8-bit RISC |
| Maximum CPU Frequency | 32 MHz |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 bytes |
| Operating Voltage Range (VDD) | 1.8 V to 3.6 V (LF) |
| I/O Pins | Up to 24 |
| ADC | 12-bit ADC2 with 5-bit DAC |
| Comparators | Low-Power Comparator |
| LCD Driver | Integrated segmented LCD driver with charge pump |
| Timers | PWM, CCP, CWG, SMT, RTCC, HLT, WWDT |
| Peripheral Features | PPS, ZCD, PMD |
| Package | 28-pin SOIC (SO) |
| Operating Temperature | -40 C to +125 C (E = extended) |
| Mounting Type | Surface Mount |
| MSL Level | MSL 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
PIC16LF19156-E/SO Pin Configuration
| Pin 1 | RA0 — Analog/Digital I/O |
| Pin 2 | RA1 — Analog/Digital I/O |
| Pin 3 | RA2 — Analog/Digital I/O |
| Pin 4 | RA3 — Analog/Digital I/O |
| Pin 5 | RA4 — Analog/Digital I/O |
| Pin 6 | RA5 — Analog/Digital I/O |
| Pin 7 | RA6 — Analog/Digital I/O |
| Pin 8 | RA7 — Analog/Digital I/O |
| Pin 9 | VSS — Ground |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | RB0 — Analog/Digital I/O |
| Pin 12 | RB1 — Analog/Digital I/O |
| Pin 13 | RB2 — Analog/Digital I/O |
| Pin 14 | RB3 — Analog/Digital I/O |
| Pin 15 | RB4 — Analog/Digital I/O |
| Pin 16 | RB5 — Analog/Digital I/O |
| Pin 17 | RB6 — Analog/Digital I/O / ICSPCLK |
| Pin 18 | RB7 — Analog/Digital I/O / ICSPDAT |
| Pin 19 | RC0 — Analog/Digital I/O |
| Pin 20 | RC1 — Analog/Digital I/O |
| Pin 21 | RC2 — Analog/Digital I/O |
| Pin 22 | RC3 — Analog/Digital I/O |
| Pin 23 | RC4 — Analog/Digital I/O |
| Pin 24 | RC5 — Analog/Digital I/O |
| Pin 25 | RC6 — Analog/Digital I/O |
| Pin 26 | RC7 — Analog/Digital I/O |
| Pin 27 | VSS — Ground |
| Pin 28 | VDD — Positive supply voltage |
Typical Applications
PIC16LF19156-E/SO is suitable for 6 applications: Battery-Powered Metering with Segmented LCD, Industrial HMI Tile with Local LCD Readout, IoT Sensor End-Node with Battery Reporting, Low-Power Medical Wearable Device, Handheld Test & Measurement Instrument, Consumer Appliance Front Panel with LCD.
Battery-Powered Metering with Segmented LCD
The PIC16LF19156-E/SO drives segmented LCD glass directly from the MCU via its integrated LCD driver and on-chip charge pump, eliminating the external charge pump and bias resistors that a discrete design would need. Its 1.8-3.6 V VDD range covers 2x AA alkaline, CR2032 coin-cell and Li-Ion battery chemistries without boost converters. The 12-bit ADC2 with 5-bit DAC supports precision sensor readout for water, gas or electricity meters. Estimated: at 32 MHz CPU active and LCD drive enabled, application current typically stays below 1 mA, while nanoWatt XLP sleep drops below 100 nA to extend battery life to years on a single coin cell.
Recommended
Industrial HMI Tile with Local LCD Readout
The PIC16LF19156-E/SO integrates Core Independent Peripherals (CLC, CWG, SMT) that run without CPU intervention, freeing the 32 MHz core for communications, keypad scanning and menu logic in industrial HMI tiles. PPS allows flexible pin mapping of UART, I2C and SPI signals to any I/O pin, simplifying PCB layout under the LCD glass. The 24 GPIO lines easily drive 4x4 keypad, rotary encoder, buzzer and backlight driver. The 28-SOIC package leaves generous board space for optoisolated RS-485 and surge protection.
Recommended
IoT Sensor End-Node with Battery Reporting
IoT sensor end-nodes benefit from the PIC16LF19156-E/SO's nanoWatt XLP sleep modes (current typically below 100 nA with LCD off and RTCC running), allowing multi-year battery life on a duty-cycled LoRa or sub-GHz reporting profile. The 12-bit ADC2 with hardware averaging supports accurate temperature, humidity and battery-voltage monitoring without waking the CPU. The integrated ZCD (Zero-Cross Detect) simplifies AC mains sensing for hybrid-mains/battery nodes. PPS and PMD (Peripheral Module Disable) cut dynamic power by gating unused peripherals.
Recommended
Low-Power Medical Wearable Device
Medical wearables such as pulse oximeters, wearable patches and glucose meters run from coin-cell or Li-Po batteries and need to remain sealed, so the PIC16LF19156-E/SO's low quiescent current and integrated LCD keep the BOM small and the standby current in the microamp range. The 12-bit ADC2 with hardware averaging captures photodiode or biosensor signals at low CPU overhead, while the Low-Power Comparator enables continuous battery-voltage monitoring without waking the core. RTCC with calendar mode powers wake-on-event scheduling across multi-day logging.
Recommended
Handheld Test & Measurement Instrument
Handheld DMMs, cable testers and field-service instruments benefit from the PIC16LF19156-E/SO's 32 MHz CPU for fast ADC sampling, segmented LCD for numeric and bar-graph readout, and integrated charge pump for stable contrast at low battery. The 12-bit ADC2 with 5-bit DAC supports stimulus/measurement loops for component and cable testing. PMD and PPS let the firmware shut down unused peripherals during long standby periods in the field, while the 28-SOIC leaves room for banana jacks and a rotary switch on the PCB.
Recommended
Consumer Appliance Front Panel with LCD
Consumer appliances such as coffee machines, ovens and washing machines use the PIC16LF19156-E/SO to drive segmented LCD glass for time, temperature and program indicators without an external driver. The integrated charge pump keeps the LCD contrast stable across mains dips and brown-outs, and the CWG peripheral simplifies zero-cross switching for triac-controlled heating elements. The Low-Power Comparator enables capacitive touch sensing on the front panel via hardware averaging, reducing firmware complexity.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF19156-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF19155-E/SO | PIC16LF19156T-E/SO | PIC16LF19156-E/SP | PIC16LF18456-E/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-28 (SO) | SOIC-28 (SO) | SOIC-28 (SO) | SPDIP-28 (SP) | SOIC-28 (SO) |
| Program Memory (Flash) | 28 KB | 14 KB | 28 KB | 28 KB | 14 KB |
| Data SRAM | 2 KB | 1 KB | 2 KB | 2 KB | 1 KB |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Integrated LCD Driver | Yes (with charge pump) | Yes (with charge pump) | Yes (with charge pump) | Yes (with charge pump) | No (peripheral set differs) |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
Key Differentiators
- Integrated segmented LCD driver with on-chip charge pump (vs PIC16LF18456-E/SO)
- Same-family 28 KB Flash in SOIC-28 with -E temperature grade (vs PIC16LF19155-E/SO)
- Tape-and-reel packaging code for SMT volume lines (vs PIC16LF19156-E/SO (tube))
Design Notes
Add 100 nF ceramic decoupling on each VDD/AVDD pin and a single 10 uF bulk on the main VDD rail; place decoupling within 3 mm of the supply pins per the PIC16(L)F1915x family PCB layout guideline. For battery applications, choose the LF variant to keep Iq low at 1.8 V, and use nanoWatt XLP sleep with RTCC running for periodic wake to push average current below 1 uA.
Route the LCD segment and common traces with parallel spacing to minimize crosstalk, and place the charge-pump flying capacitors within 5 mm of the dedicated CPSCAP pins. Keep the ICSPCLK/ICSPAT pins (RB6/RB7) accessible for in-circuit programming and debugging with PICkit 4 or MPLAB SNAP; do not share these with high-current signals. Use a ground pour under the MCU to lower EMI and improve thermal dissipation.
Do not select the PIC16F19156 by mistake when you need the LF (1.8 V-3.6 V) range: the F variant will not start reliably below 2.3 V, causing field failures in drained-battery scenarios. Always set the Configuration Word BOR (Brown-out Reset) to an LF-compatible threshold and verify unused I/O are configured as outputs (not inputs) to avoid floating-pin current. Ensure the charge-pump capacitor value matches the family datasheet's BOM, typically 1 uF X7R, to keep LCD contrast stable at low battery.
Compliance Information
RoHS and REACH compliance per Microchip product page; not AEC-Q100 qualified (industrial-grade only).
