PIC16LF19156-I/SS - 8-Bit XLP MCU, 32MHz, 28KB Flash | Microchip
MPN: PIC16LF19156-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.62 | $2.62 |
| 10 | $2.34 | $23.40 |
| 100 | $1.97 | $197.00 |
| 500 | $1.71 | $855.00 |
| 1,000 | $1.49 | $1,490.00 |
PIC16LF19156-I/SS Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and programmable I/O peripherals. The 8-bit class (such as PIC, AVR, 8051, and low-end STM8) targets cost-sensitive, deterministic control tasks where simple instruction sets and low power outweigh raw throughput. Within the PIC family hierarchy, the PIC16LF19156 belongs to the PIC16F191xx sub-family, sits above PIC10/PIC12 in complexity, and falls below PIC18/PIC24 in register width and address space. The 'LF' prefix denotes the wide-voltage 1.8-3.6V variant; the 'F' sibling supports 2.3-5.5V.
Key features include a maximum operating frequency of 32MHz (8MHz instruction rate with 4-cycle pipeline), 1.8V to 3.6V supply range, an integrated LCD charge pump, up to 35 high-current I/O pins, 12-bit ADC with computation (ADC2), 8-bit DAC, multiple 16-bit timers, and configurable logic cells (CLC) for hardware state-machine implementation. The XLP Sleep mode draws nanoamp-level current, enabling multi-year coin-cell battery operation when paired with an LCD.
The PIC16LF19156 combines a Harvard RISC architecture with peripheral flexibility. Flash self-programming supports in-field firmware updates, while CIPs such as the Complementary Waveform Generator (CWG), Signal Measurement Timer (SMT), and Peripheral Pin Select (PPS) reduce CPU wake-up overhead and free the core from bit-banging real-time I/O.
Typical applications include battery-powered LCD thermostats and metering displays, wearable health monitors, IoT sensor nodes with on-glass segment displays, consumer remote controls, low-cost HMI panels, and ePaper / segment-LCD industrial gauges. The wide voltage range and integrated charge pump remove the need for a boost converter in many 3V designs.
When designing with this part, ensure the ICD pins (ICSPCLK/ICSPDAT) are not pulled low at reset to avoid inadvertent entry into in-circuit serial programming mode. Verify the charge pump capacitor selection against the LCD segment load, and use PPS routing to remap peripherals without rewiring the PCB. Adequate decoupling (100nF + bulk) is required near VDD with the AVREF pin referenced cleanly for ADC accuracy.
This page synthesizes distributor pricing from 11+ channels, validated drop-in same-package alternatives in the same SSOP-28 footprint, and practical design notes (XLP sleep current, charge pump tuning, ADC2 averaging) not consolidated in the standalone datasheet.
Drop-in alternatives for PIC16LF19156-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 PIC16LF19156-I/SS (same form factor and footprint) — differing in ADC, Package, Operating Temperature, DAC, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF19155-I/SS
✅ Drop-In✓ In Stock
$0.95 / Unit
View Datasheet →PIC16LF18856-I/SS
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View Datasheet →PIC16LF18446-I/SS
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View Datasheet →PIC16LF1788-I/SS
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$2.32 / Unit
View Datasheet →PIC16LF1829-I/SS
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View Datasheet →PIC16LF18346-I/SS
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View Datasheet →PIC16LF19156-I/SS Maximum Ratings & Electrical Characteristics
| Core | PIC16 (8-bit RISC Harvard) |
| Family | PIC XLP 16F |
| Maximum CPU Frequency | 32 MHz |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data RAM | 2 KB |
| Data EEPROM | 256 bytes |
| Operating Voltage Range | 1.8 V to 3.6 V |
| Package | 28-SSOP (0.209", 5.30 mm width) |
| Pin Count | 28 |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial, 'I' suffix) |
| LCD Driver | Integrated with on-chip charge pump |
| ADC | 12-bit ADC with Computation (ADC2) |
| DAC | 8-bit DAC |
| Timers | Multiple 16-bit timers (SMT, CWG support) |
| Configurable Logic Cells (CLC) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| I/O Pins (approx., high-current) | Up to 35 (max device feature, package-dependent) |
| Communication Interfaces | I2C, SPI, UART x2 |
| XLP Sleep Current | Nanoamp-range (XLP technology) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16LF19156-I/SS Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8V - 3.6V) |
| Pin 2 | RA5 — Bidirectional I/O / digital-only |
| Pin 3 | RA4 — Bidirectional I/O |
| Pin 4 | RA3/MCLR — Input only / Master Clear (reset) |
| Pin 5 | RC5 — Bidirectional I/O |
| Pin 6 | RC4 — Bidirectional I/O |
| Pin 7 | RC3 — Bidirectional I/O |
| Pin 8 | RC6 — Bidirectional I/O |
| Pin 9 | RC7 — Bidirectional I/O |
| Pin 10 | RB7 — Bidirectional I/O / programming data |
| Pin 11 | RB6 — Bidirectional I/O / programming clock |
| Pin 12 | RB5 — Bidirectional I/O |
| Pin 13 | RB4 — Bidirectional I/O |
| Pin 14 | RB3 — Bidirectional I/O |
| Pin 15 | RB2 — Bidirectional I/O |
| Pin 16 | RB1 — Bidirectional I/O |
| Pin 17 | RB0 — Bidirectional I/O |
| Pin 18 | VSS — Ground reference |
| Pin 19 | RD7 — Bidirectional I/O |
| Pin 20 | RD6 — Bidirectional I/O |
| Pin 21 | RD5 — Bidirectional I/O |
| Pin 22 | RD4 — Bidirectional I/O |
| Pin 23 | RC0 — Bidirectional I/O |
| Pin 24 | RC1 — Bidirectional I/O |
| Pin 25 | RC2 — Bidirectional I/O |
| Pin 26 | RA2 — Bidirectional I/O / analog input |
| Pin 27 | RA1 — Bidirectional I/O / analog input |
| Pin 28 | RA0 — Bidirectional I/O / analog input |
Typical Applications
PIC16LF19156-I/SS is suitable for 6 applications: Battery-Powered LCD Thermostat, Wearable Health Monitor (Segment LCD), IoT Sensor Node with LCD HMI, Consumer Remote Control with LCD, Industrial Segment-LCD Gauge / Meter, Low-Cost HMI Panel (Segment Display).
Battery-Powered LCD Thermostat
The PIC16LF19156-I/SS is purpose-built for battery-powered LCD thermostats because its integrated LCD driver with on-chip charge pump eliminates the external boost converter that traditionally raises BOM cost and quiescent current. The XLP nanoamp-range Sleep current extends coin-cell life to multi-year operation between battery swaps, while the 1.8-3.6V range accepts 2x AA alkalines directly. The 28-SSOP footprint exposes enough I/O for keypad scanning, temperature sensor I2C (TMP117 / MCP9808), and relay triac drive, all serviced by Core Independent Peripherals so the CPU wakes only on UI events.
Recommended
Wearable Health Monitor (Segment LCD)
Wearables demand nanoamp Sleep, on-glass segment displays, and tiny PCB area - all three are met by the PIC16LF19156-I/SS. Its integrated charge pump drives a 4-MUX segment LCD at 3V without a discrete boost IC, shrinking the BOM and reducing leakage paths. The 12-bit ADC2 with computation hardware averages sensor samples while the PIC16 core sleeps, freeing CPU cycles for BLE event handling. At 32 MHz the device computes simple health metrics (heart-rate intervals, step counts) entirely on-chip, deferring only display updates to interrupt-driven CIPs.
Recommended
IoT Sensor Node with LCD HMI
Industrial IoT sensor nodes benefit from the PIC16LF19156-I/SS when they require a local segment-LCD HMI plus sub-microamp Sleep current. The PIC16 XLP Sleep keeps the radio wakeup duty cycle low while the LCD remains visible, and the integrated charge pump handles 3V bias generation. CLCs (Configurable Logic Cells) glue sensor interrupts to the radio enable line without software, and the 32 MHz CPU handles protocol parsing when the radio buffers incoming frames. The 28-SSOP package suits compact DIN-rail enclosures with accessible terminals for power and field wiring.
Recommended
Consumer Remote Control with LCD
Universal remote controls lean on the PIC16LF19156-I/SS for low-cost segment-LCD feedback (volume bar, channel number, battery icon) and multi-year battery life. The integrated charge pump drives a 32-segment LCD at 3V from 2x AAA, and XLP Sleep current under 100 nA means the remote sits idle for years between user button presses. The PIC16's deterministic interrupt latency ensures IR protocol timing (RC5, NEC, Sony SIRC) is met without jitter, and the CWG peripheral generates the carrier modulation in hardware so the CPU stays in Sleep until a frame boundary.
Recommended
Industrial Segment-LCD Gauge / Meter
Industrial panel meters benefit from the PIC16LF19156-I/SS because its wide 1.8-3.6V range survives brown-out events on long 4-20 mA loops, and the integrated charge pump keeps the segment display legible even at low battery voltages. The 12-bit ADC2 directly digitizes 4-20 mA current-loop sensors, while CLCs implement latching comparator logic for alarm thresholds. CIPs (CLC, CWG, SMT) reduce firmware complexity and improve EMC immunity, and the 28-SSOP footprint fits standard 96x96 mm panel meter enclosures with room for terminal blocks and isolation barriers.
Recommended
Low-Cost HMI Panel (Segment Display)
Low-cost HMI panels with segment LCDs use the PIC16LF19156-I/SS for its combination of integrated LCD charge pump, CWG for buzzer drive, and Core Independent Peripherals that offload button scanning from the CPU. The 28-SSOP package allows compact PCB layout while the 1.8-3.6V range accepts regulated 3.3V from USB-C or 5V via an external LDO. The CLC peripheral can implement state-machine button debounce in hardware, reducing firmware size and improving deterministic response to simultaneous key presses - critical for UL-rated appliance user interfaces.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF19156-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF19155-I/SS | PIC16LF18856-I/SS | PIC16LF18446-I/SS | PIC16LF1788-I/SS |
|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 28 KB | 14 KB | 28 KB | 14 KB | 28 KB |
| Data RAM | 2 KB | 1 KB | 2 KB | 1 KB | 2 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage Range | 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 |
| Integrated LCD Charge Pump | Yes | Yes | No | No | Yes |
| XLP Sleep Current | Nanoamp-range | Nanoamp-range | Nanoamp-range | Nanoamp-range | Nanoamp-range |
Key Differentiators
- Integrated LCD charge pump eliminates external boost IC (vs PIC16LF18856-I/SS)
- ADC2 (12-bit with computation) vs legacy ADC (vs PIC16LF1788-I/SS)
- Configurable Logic Cells (CLC) for hardware state machines (vs PIC16LF18446-I/SS)
Design Notes
The PIC16LF19156-I/SS operates from 1.8V to 3.6V (LF variant). At 3.3V VDD with the CPU active at 32 MHz, typical active current is ~2.2 mA (per Microchip datasheet DC characteristics); at 1 MHz it drops to ~130 uA. In XLP Sleep mode the device draws nanoamp-range current. For battery-powered designs, place a 100 nF decoupling capacitor within 5 mm of the VDD pin and a bulk 4.7-10 uF tantalum or ceramic near the IC. AVREF should be tied to VDD with a 100 nF bypass cap if not used as an independent reference, to minimize ADC2 noise.
When using the integrated LCD charge pump, the VLCD pin must be decoupled with a 1 uF ceramic capacitor to VSS, and the pump capacitor (CP1+/CP1-) requires a 1 uF X7R ceramic in a flyback configuration. Insufficient decoupling causes display ghosting and unstable contrast at low temperatures. Estimated: charge pump current capability scales with VDD - at 1.8V VDD the pump can drive fewer LCD segments than at 3.3V; consult the datasheet VLCD/ILCD curves for your segment load before locking in the BOM.
Pin 4 (RA3/MCLR) requires careful handling: if MCLR is enabled in the configuration words, a low level on this pin resets the device. For ICSP programming, MCLR must be pulled high through a 10 kohm resistor; do NOT tie it directly to VDD without the resistor or in-system programming will fail. The ICSPDAT (RB7) and ICSPCLK (RB6) pins should be left free of pull-down resistors that could prevent the programmer from driving them. For SSOP-28, keep traces short and route the VDD/VSS pairs as adjacent power islands to minimize loop inductance.
Compliance Information
RoHS and lead-free compliance per Microchip product page. AEC-Q100 not applicable - the PIC16LF19156 family targets industrial and consumer segments, not automotive; AEC-Q100 qualified variants exist under separate -Q1 ordering codes. Halogen-free status not explicitly listed in the verified data.
