PIC16LF19155-I/SS - 32MHz 8-bit MCU, 14KB Flash, XLP | Microchip
MPN: PIC16LF19155-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.46 | $14.60 |
| 100 | $1.3 | $130.00 |
| 500 | $1.1 | $550.00 |
| 1,000 | $0.95 | $950.00 |
PIC16LF19155-I/SS Overview
An 8-bit microcontroller (MCU) is a programmable microprocessor with an 8-bit data bus, flash program memory, RAM, EEPROM, and on-chip peripherals such as ADC, timers, comparators, and communication interfaces. The PIC16LF19155 belongs to the PIC16 family of mid-range 8-bit microcontrollers within the broader microcontroller category of embedded computing semiconductors, designed for deterministic real-time control with a Harvard RISC architecture. It serves the system role of low-power sensor-node processor in battery-powered or energy-harvesting products.
Key features include a 32MHz internal oscillator, an integrated 12-bit ADC2 with computation, a 5-bit DAC, low-power comparators, zero-cross detect (ZCD), configurable logic cells (CLC), complementary waveform generator (CWG), PWM/CCP modules, RTCC, hardware limit timer (HLT), windowed watchdog timer (WWDT), and peripheral pin select (PPS) for flexible signal routing. The device also provides Core Independent Peripherals (CIPs) that operate without CPU intervention, reducing firmware complexity and power consumption.
The architecture combines a 14-bit instruction word, an 8-bit data path, and a hardware multiplier-free instruction set, supporting C and assembly development under MPLAB X IDE with the XC8 compiler. The integrated charge pump allows bias generation for up to 96-segment LCD glass with Vdd as low as 1.8V, eliminating an external boost converter. Intelligent analog features, including a 12-bit differential ADC with oversampling, support sensor signal conditioning directly on-chip.
Typical applications include battery-powered LCD thermostats, portable medical monitors, smart energy meters, IoT sensor nodes with displays, electronic shelf labels, and wearable health devices. The wide operating voltage range makes it compatible with 2x AA alkaline or single-cell Li-Ion primary chemistries. The device supports operating temperatures of -40C to +85C (industrial grade, "I" suffix).
When designing with this MCU, allocate the charge pump output to one of the VLCD1/VLCD2/VLCD3 pins and ensure the bias timing matches the LCD glass multiplex rate. Decoupling should include a 100nF ceramic plus 1uF bulk on Vdd, and unused pins should be configured as outputs low to minimize leakage. For low-power operation, leverage the device's deep-sleep modes with RAM retention to achieve quiescent currents under 1 uA.
This page synthesizes distributor pricing, drop-in alternative analysis, and practical design considerations not found in the manufacturer datasheet alone, supporting both new design and second-source validation for the PIC16LF19155-I/SS.
Drop-in alternatives for PIC16LF19155-I/SS — 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 PIC16LF19155-I/SS (same form factor and footprint) — differing in ADC, Package, Core, Operating Temperature, Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF19155-I/SO
✅ Drop-In✓ In Stock
$1.19 / Unit
View Datasheet →PIC16LF19155-E/SS
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF18855-I/SS
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16LF1829-I/SS
✅ Drop-In✓ In Stock
$1.15 / Unit
View Datasheet →PIC16LF18446-I/SS
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16LF19155-I/SS Maximum Ratings & Electrical Characteristics
| Family | PIC16LF191xx (PIC16 XLP) |
| Core | 8-bit RISC, 14-bit instruction word |
| Maximum CPU Frequency | 32 MHz |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1 KB (1024 bytes) |
| Data EEPROM | 256 bytes |
| Operating Voltage Range | 1.8 V to 3.6 V |
| ADC | 12-bit ADC2 with computation (5-bit DAC also present) |
| LCD Driver | Integrated with on-chip charge pump (up to 96 segments) |
| Comparators | Low-power comparators with ZCD |
| Timers/PWM/CCP | PWM, CCP, CWG modules |
| Package | 28-pin SSOP (5.30 mm body) |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16LF19155-I/SS Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O with interrupt-on-change |
| Pin 2 | RA4 — Bidirectional I/O with interrupt-on-change |
| Pin 3 | RA3 — Bidirectional I/O with interrupt-on-change (MCLR/Vpp alternate) |
| Pin 4 | RC5 — Bidirectional I/O |
| Pin 5 | RC4 — Bidirectional I/O |
| Pin 6 | RC3 — Bidirectional I/O |
| Pin 7 | RC2 — Bidirectional I/O |
| Pin 8 | RC1 — Bidirectional I/O |
| Pin 9 | RC0 — Bidirectional I/O |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply voltage 1.8V-3.6V |
| Pin 12 | RB7 — Bidirectional I/O with interrupt-on-change |
| Pin 13 | RB6 — Bidirectional I/O with interrupt-on-change |
| Pin 14 | RB5 — Bidirectional I/O with interrupt-on-change |
| Pin 15 | RB4 — Bidirectional I/O with interrupt-on-change |
| Pin 16 | RB3 — Bidirectional I/O with interrupt-on-change |
| Pin 17 | RB2 — Bidirectional I/O with interrupt-on-change |
| Pin 18 | RB1 — Bidirectional I/O with interrupt-on-change |
| Pin 19 | RB0 — Bidirectional I/O with interrupt-on-change |
| Pin 20 | RA0 — Bidirectional I/O with interrupt-on-change |
| Pin 21 | RA1 — Bidirectional I/O with interrupt-on-change |
| Pin 22 | RA2 — Bidirectional I/O with interrupt-on-change |
| Pin 23 | RC6 — Bidirectional I/O |
| Pin 24 | RC7 — Bidirectional I/O |
| Pin 25 | RA6 — Bidirectional I/O with interrupt-on-change |
| Pin 26 | RA7 — Bidirectional I/O with interrupt-on-change |
| Pin 27 | VSS — Ground reference |
| Pin 28 | VDD — Positive supply voltage 1.8V-3.6V |
Typical Applications
PIC16LF19155-I/SS is suitable for 7 applications: Battery-Powered LCD Thermostat, Portable Medical Monitor, Smart Energy Meter with Display, IoT Sensor Node with LCD, Electronic Shelf Label, Wearable Health Device, Industrial Sensor with Display.
Battery-Powered LCD Thermostat
The PIC16LF19155-I/SS is purpose-built for battery-powered LCD thermostats thanks to its integrated LCD driver with on-chip charge pump supporting up to 96 segments, which eliminates an external boost converter and reduces BOM cost. Operating from 1.8V to 3.6V across 2x AA alkaline cells, the LF variant sustains full-speed 32MHz operation throughout battery discharge. Its 12-bit ADC2 with computation directly digitizes thermistor or RTD signals without external op-amps, while XLP deep-sleep currents below 1 uA extend coin-cell runtime to multi-year lifetimes in wireless thermostat designs.
Recommended
Portable Medical Monitor
In portable medical monitors such as pulse oximeters and glucose meters, the PIC16LF19155-I/SS provides 14KB flash for application firmware, 1KB SRAM for sample buffers, and 256B EEPROM for non-volatile patient calibration constants. The 12-bit ADC2 with oversampling achieves >14 ENOB for accurate photodiode PPG or electrochemical strip readings. Its XLP sleep modes with RTCC wake enable multi-day battery life on a single CR2032 coin cell, while the integrated LCD driver displays readings without a separate display driver IC.
Recommended
Smart Energy Meter with Display
Smart energy meters benefit from the PIC16LF19155-I/SS's integrated LCD driver, which displays kWh, voltage, and power-factor data directly on a multi-digit glass without external driver ICs. The 32MHz CPU and 12-bit ADC2 with computation perform real-time current/voltage RMS and active-power calculations per IEC phase-metering signal paths. The on-chip ZCD sense detects zero crossings to gate energy accumulation, while the CLC/CWG peripherals generate zero-cross switching signals for relay control.
Recommended
IoT Sensor Node with LCD
IoT sensor nodes with local LCDs leverage the PIC16LF19155-I/SS for sub-1 GHz or BLE-connected field sensors that need to display readings locally. The PIC16LF19155's wide 1.8V-3.6V Vdd range supports 2x AA alkaline or single-cell Li-FeS2 primary chemistries for multi-year deployments. The integrated charge pump drives 4-mux to 8-mux LCD glass from a low battery voltage, while the 12-bit ADC2 with computation oversamples sensor outputs to reduce noise without CPU wake-up, achieving system quiescent currents below 5 uA.
Recommended
Electronic Shelf Label
Electronic shelf labels (ESLs) in retail use the PIC16LF19155-I/SS to drive segmented E-ink or LCD displays, manage wireless link, and sleep for years on a coin cell. The device's sub-microamp deep-sleep current with RTCC retention enables 5-10 year battery life in wireless ESLs. Its on-chip charge pump supports 96-segment LCD displays showing price, unit, and barcode, while the CLC/CWG peripherals handle RF sub-GHz transceiver control without CPU intervention for power efficiency.
Recommended
Wearable Health Device
Wearable health devices such as fitness bands and continuous glucose monitors benefit from the PIC16LF19155-I/SS's compact 28-SSOP package, integrated LCD for wristband displays, and XLP technology. The 32MHz core processes PPG, ECG, or bioimpedance signals in real time, while the 12-bit ADC2 oversamples to >14 ENOB for clinical-grade accuracy. XLP sleep modes with peripheral wake enable 7-14 day battery life on a small Li-Ion cell, and the integrated charge pump drives the watch-face LCD without an external boost regulator.
Recommended
Industrial Sensor with Display
Industrial sensors with local LCD readouts use the PIC16LF19155-I/SS to combine transducer signal conditioning, computation, and display driving in a single MCU. The 12-bit ADC2 with computation oversamples 4-20mA loop-powered transducer signals, while the CLC peripheral implements window comparator and Schmitt trigger functions in hardware. The integrated charge pump supports industrial-rated LCD glass that operates at -40C to +85C, and the 14KB flash holds process-control and diagnostic firmware for factory-floor sensor nodes.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF19155-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF19155-I/SO | PIC16LF19155-E/SS | PIC16LF18855-I/SS | PIC16LF1829-I/SS | PIC16LF18446-I/SS |
|---|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SOIC (different pitch) | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Core | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC |
| Flash Memory | 14 KB | 14 KB | 14 KB | 14 KB | 14 KB | 28 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB |
| Operating Voltage | 1.8V - 3.6V | 1.8V - 3.6V | 1.8V - 3.6V | 1.8V - 3.6V | 1.8V - 3.6V | 1.8V - 3.6V |
| ADC Resolution | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 10-bit ADC | 10-bit ADC | 12-bit ADC2 |
| LCD Driver | Yes, with charge pump | Yes, with charge pump | Yes, with charge pump | Yes, with charge pump | No LCD driver | Yes, with charge pump |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
Key Differentiators
- Integrated LCD charge pump eliminates external boost converter (vs PIC16LF1829-I/SS)
- 12-bit ADC2 with computation vs 10-bit ADC in prior generation (vs PIC16LF18855-I/SS)
- Core Independent Peripherals (CIPs) - CLC, CWG, ZCD (vs PIC16LF18446-I/SS)
Design Notes
For lowest quiescent current on the PIC16LF19155-I/SS, configure all unused peripherals as off in the PMD register and disable the WDT unless absolutely needed. Place the device into Sleep with RTCC wake every 1-60 seconds, and use interrupt-on-change (IOC) on a single button for user input. The 1.8V-3.6V Vdd range allows direct connection to 2x AA alkaline or a single CR2032 without an LDO; however, adding a 1uF ceramic decoupling capacitor plus a 100nF high-frequency bypass on Vdd pins 11 and 28 is mandatory per Microchip datasheet recommendations.
The 28-SSOP package has a 0.65mm lead pitch requiring careful PCB layout. Use NSMD (non-solder-mask-defined) pads with a pad width of 0.40mm and length of 1.50mm, and route the Vdd/ground pair on adjacent layers with stitched vias to form a low-inductance supply. The exposed thermal pad is not present on the SSOP, so ground flooding the entire bottom of the PCB improves thermal dissipation. Keep the 32MHz HFINTOSC trace lengths short, since long traces can couple EMI into sensitive analog ADC inputs.
The PIC16LF19155-I/SS's 12-bit ADC2 achieves >10 effective bits when the input signal source impedance is below 1k ohm and a 100nF ceramic capacitor is placed directly at the analog input pin. Route analog and digital signals on separate PCB layers, and avoid running digital switching traces parallel to ADC traces to minimize digital crosstalk. Enable the ADC's hardware averaging feature to further improve ENOB when sampling low-frequency transducer signals.
A common design pitfall with the PIC16LF19155-I/SS is configuring the LCD charge pump at too high a voltage for the chosen glass, which can damage the LCD or reduce its lifetime; verify the VLCD trim register setting against your display's maximum rated voltage. Another pitfall is using the non-LF (F only) version in a 3.3V or below system - the PIC16F19155 requires minimum 2.3V. Always use the LF variant for battery-powered products. Finally, the MCLR/RA3 pin doubles as the in-circuit programming voltage input and must not be pulled low at power-up unintentionally.
Compliance Information
RoHS compliant per Microchip product page and distributor listings. Not AEC-Q100 qualified - choose AEC-Q100 grade parts from PIC16LF191xx family for automotive.
