Microchip PIC12C508AT-04I/SM: A Compact 8-Pin 8-Bit CMOS Microcontroller

The Microchip PIC12C508AT-04I/SM is an 8-bit microcontroller that exemplifies high integration within an extremely small form factor. Housed in an 8-pin SOIC package, this device is a powerful component designed for space-constrained and cost-sensitive embedded applications. Its architecture is built on a fully static CMOS foundation, ensuring low power consumption and making it an excellent choice for battery-operated and portable devices.

Operating at a maximum frequency of 4 MHz, the PIC12C508A is built around the versatile 8-bit RISC CPU core characteristic of Microchip’s baseline PIC family. This core executes a concise set of 33 single-word instructions, enabling efficient and straightforward code development. The microcontroller features 512 words of 12-bit wide EPROM program memory and 25 bytes of SRAM data memory, providing sufficient resources for a wide array of control-oriented tasks.

A key strength of this microcontroller lies in its integrated peripherals, which are impressive for its pin count. It includes a high-precision internal 4 MHz oscillator, reducing the need for external clock components and further minimizing the bill of materials and board space. The device also incorporates a versatile 8-bit timer/counter (TMR0) and a watchdog timer for enhanced system reliability. Despite its limited pinout, it offers multiple I/O options with 6 programmable I/O pins, each capable of sourcing or sinking significant current for direct LED or small relay driving.

The part number suffix ‘-04I/SM’ provides critical information: the ‘-04’ denotes a 4 MHz operating speed, ‘I’ indicates an industrial temperature range (-40°C to +85°C), and ‘SM’ specifies the surface-mount SOIC package. This makes the component robust enough for demanding environments beyond typical consumer use. Its CMOS technology is instrumental in achieving low current draw, especially in sleep modes, which is crucial for applications requiring long-term operation on a single power source.

Typical applications leveraging the capabilities of the PIC12C508AT-04I/SM include sensor nodes, remote controls, timers, motor control interfaces, and various consumer and industrial automation subsystems where minimal size, low cost, and dependable performance are paramount.

ICGOODFIND: The Microchip PIC12C508AT-04I/SM stands as a testament to highly efficient design, packing a capable 8-bit CPU, memory, and essential peripherals into a minimal 8-pin footprint. Its ultra-compact SOIC package, low power operation, and integrated oscillator make it an enduringly popular choice for engineers optimizing designs for size, cost, and power efficiency.

Keywords: 8-bit Microcontroller, Low Power Consumption, CMOS Technology, SOIC Package, Industrial Temperature Range.