Microchip ATTINY24A-SSF Datasheet and Technical Specifications

The Microchip ATTINY24A-SSF is a high-performance, low-power 8-bit AVR RISC-based microcontroller that combines a rich feature set with a compact form factor, making it an ideal solution for a vast array of embedded control applications. Packaged in a 20-pin SSF (Shrink Small Outline Package), this device is part of the renowned ATtiny family, designed for applications where space, power efficiency, and cost are critical constraints.

Core Architecture and Performance

At its heart, the ATTINY24A-SSF features an advanced AVR RISC architecture. The CPU can execute powerful instructions in a single clock cycle, achieving a throughput approaching 1 MIPS per MHz, which allows the system designer to optimize power consumption versus processing speed. The microcontroller operates between 1.8V and 5.5V, providing the flexibility to run from a variety of power sources, including batteries, and can reach a maximum operating frequency of 20 MHz at 4.5V - 5.5V.

Memory and Programming

The chip is equipped with 2KB of In-System Self-Programmable Flash program memory, 128B of EEPROM for non-volatile data storage, and 128B of internal SRAM. It supports in-system programming (ISP) via SPI, enabling easy firmware updates without removing the chip from the circuit board.

Peripheral Set and Integration

A key strength of the ATTINY24A-SSF is its impressive array of integrated peripherals, which helps reduce external component count and total system cost. Notable features include:

10-bit ADC (Analog-to-Digital Converter): A 12-channel ADC with 11 single-ended channels and 1 differential channel with programmable gain. This is crucial for sensor interface applications.

Two Analog Comparators: For comparing external analog voltages without using the ADC.

Universal Serial Interface (USI): A highly flexible hardware module that can be configured to implement SPI, I2C, or UART protocols, providing versatile communication options.

Hardware 10-bit PWM (Pulse Width Modulation): Four PWM channels are available for precise control of motors, LEDs, and other actuators.

12 Programmable I/O Lines: Offering full flexibility for digital interfacing.

Special Features and Power Management

The device includes multiple power-saving modes to extend battery life in portable devices. The Idle, ADC Noise Reduction, and Power-Down modes allow the CPU to sleep while allowing specific peripherals to continue functioning, waking the processor only when an interrupt is triggered. Furthermore, it includes an internal calibrated oscillator, eliminating the need for an external crystal in many applications and further saving board space and cost. An enhanced watchdog timer with a separate on-chip oscillator provides reliable protection against system lock-ups.

Applications

The ATTINY24A-SSF is perfectly suited for a wide range of applications, including:

Consumer electronics and appliances

Sensor interfacing and data logging

Touch sensing (using its built-in QTouch® acquisition capability)

Industrial control systems

Portable medical devices

Automotive peripherals

ICGOOODFIND: The Microchip ATTINY24A-SSF stands out as an extremely versatile and power-efficient microcontroller. Its combination of a robust AVR core, a rich set of integrated analog and digital peripherals, and its space-saving SSF package makes it a superior choice for designers looking to create sophisticated, compact, and cost-effective embedded systems.

Keywords:

1. AVR RISC

2. Low-Power

3. 10-bit ADC

4. USI (Universal Serial Interface)

5. Embedded Control