PIC16F19155-I/SS
PIC16F19155-I/SS - 14KB Flash 32MHz XLP MCU | Microchip
The Microchip Technology PIC16F19155-I/SS is an 8-bit PIC16 RISC microcontroller with 14KB (8K x 14) of Flash program memory, 1KB of SRAM, and 256 bytes of EEPROM, housed in a 28-pin SSOP package. It operates up to 32MHz with Core Independent Peripherals, integrated LCD drive, 12-bit ADC2 with up to 20 channels, a 5-bit DAC, low-power comparator, and XLP (eXtreme Low Power) technology for battery-powered designs.
An 8-bit microcontroller (MCU) is a single-chip processor that integrates a CPU, program memory (Flash), data memory (SRAM), non-volatile storage (EEPROM), and a rich set of peripherals (ADC, timers, communication interfaces) on a single silicon die. The 8-bit PIC16 family belongs to the larger PIC microcontroller hierarchy from Microchip, sitting below the PIC18 (8-bit, higher performance), PIC24/dsPIC (16-bit), and PIC32 (32-bit) families. Within embedded systems, 8-bit MCUs are typically used in cost-sensitive, low-power applications where computational throughput requirements are modest — sensor nodes, consumer appliances, simple motor control, and human-machine interfaces.
Key differentiating features include the integrated charge pump for LCD bias generation (eliminating external discrete bias components), 4 x 16-bit timers, PWM/CCP/CWG waveform generators, SMT (Signal Measurement Timer), ZCD (Zero-Cross Detect), RTCC (Real-Time Clock Calendar), and PPS (Peripheral Pin Select) for flexible pin remapping. The XLP variant delivers typical sleep currents below 1 µA, making the part especially suited to battery-powered LCD applications such as thermostats, utility meters, and portable instrumentation.
Architecturally, the PIC16F19155 uses a Harvard RISC core with a 14-bit instruction word and a single-cycle instruction pipeline at 32MHz (8MIPS). The device supports 1.8V–5.5V operation across an industrial temperature range of -40°C to +85°C, and includes Core Independent Peripherals (CIPs) that operate without CPU intervention for tasks like waveform generation, signal measurement, and ADC triggering — reducing firmware complexity and power consumption.
Typical applications include battery-powered LCD display modules, IoT sensor nodes, smart thermostats, utility metering, consumer appliance interfaces, and low-power industrial sensor transmitters. The integrated LCD driver (up to 96 segments) and charge pump allow direct connection to segmented LCD glass without an external bias generator.
When designing with this part, allocate PCB area for the ICSPDAT/ICSPCLK programming/debug pins and ensure the VDD/VSS decoupling network uses 100nF ceramic capacitors placed within 5mm of the supply pins. For noise-sensitive analog measurements, configure the FVR (Fixed Voltage Reference) for stable ADC readings across temperature.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone — including thermal/power budgets and cross-brand cross-reference guidance.
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