PIC16F1705-I/ST
PIC16F1705-I/ST - 8-Bit 32MHz MCU 14KB Flash XLP | Microchip
The Microchip Technology PIC16F1705-I/ST is an 8-bit PIC microcontroller featuring 14KB (8K x 14 words) of Flash program memory, 1KB of RAM, and a maximum CPU clock of 32 MHz, housed in a 14-pin TSSOP package. It belongs to the PIC16F XLP family and combines Intelligent Analog integration (on-chip op amps, 10-bit ADC, 8-bit DAC, comparators, Zero-Cross Detect) with extreme low-power XLP peripherals to suit a wide variety of general-purpose applications. The -I suffix denotes the industrial -40°C to +85°C temperature grade, and /ST designates the 14-lead Thin Shrink Small Outline Package (TSSOP-14).
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, typically used for embedded control in cost- and power-sensitive applications. The PIC16F1705 sits within the broader hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor device. Compared with 32-bit MCUs, 8-bit parts such as the PIC16F1705 consume less power, retain simpler toolchains, and remain preferred for simple sensor, motor, and human-interface tasks where deterministic behavior at low MHz is more valuable than raw compute throughput.
Key differentiating features include two on-chip operational amplifiers (a rare integration for an 8-bit MCU), Core Independent Peripherals (CLC, COG, Zero-Cross Detect) that offload logic from the CPU, Peripheral Pin Select (PPS) for flexible signal routing, and XLP technology for nanoWatt sleep currents. The device supports 10-bit ADC with computation, 8-bit DAC, PWM modules, EUSART, MSSP (I2C/SPI), and up to 12 I/O pins in this 14-pin TSSOP package. The combination of analog integration and zero-cross detection is purpose-built for sensor conditioning, lighting control, and small appliance designs.
Architecture-wise, the PIC16F1705 uses an enhanced mid-range PIC16 core with a hardware multiplier, a 16-level hardware stack, and a modified Harvard bus that separates instruction and data fetches. Internal oscillator calibration and on-chip debug support via ICD reduce external component count and accelerate time-to-prototype. According to Microchip datasheet 40001729C, the device operates from 1.8V to 5.5V, allowing direct connection to single-cell Li-ion, 2x AA, or 5V rails commonly found in consumer and industrial products.
Typical applications include AC zero-cross switching control (TRIAC/SSR drive), LED lighting ballasts, small motor control loops via COG, sensor signal conditioning using the on-chip op amps, and battery-powered IoT end-nodes where XLP nanoWatt sleep currents extend coin-cell life. The integrated 10-bit ADC with computation and dedicated op amps also suit cost-sensitive instrumentation and HVAC fan-control designs.
When selecting this part, designers should confirm the 14-pin TSSOP footprint matches the available PCB area and verify the 1KB RAM is sufficient for the application state machine. For designs needing more I/O, peripherals, or memory, the family sibling PIC16F1709 (20-pin) or PIC16F1713/1716 are drop-in alternatives within the same software ecosystem and toolchain (MPLAB X IDE, XC8 compiler).
This page aggregates distributor pricing, parameter-level comparison versus same-package PIC16F family siblings, drop-in alternatives, and practical design guidance not found in a single manufacturer datasheet.
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