HT45F23A/HT45F24A

General Information

The HT45F23A and HT45F24A are Flash Memory Tinypower A/D type 8-bit high performance RISC architecture microcontrollers, designed especially for applications that interface directly to analog signals. The devices have higher gain bandwidth making them more suitable for higher frequency applications.

Offering users the convenience of Flash Memory multi-programming features, the devices also include wide range of functions and features. Other memory includes an area of RAM Data Memory as well as an area of true EEPROM memory for storage of non-volatile data such as serial numbers, calibration data etc.

Analog features include an integrated multi-channel Analog to Digital Converter, dual Pulse Width Modulation outputs, dual Operational Amplifiers, dual Comparators, one internal 2.4V or 3.3V LDO (Low Drop Out) for voltage regulator and a 12-bit DAC for voice output application, communication with the outside world is catered for by including fully integrated SPI or I²C interface functions, two popular interfaces which provide designers with a means of easy communication with external peripheral hardware. Protective features such as an internal Watchdog Timer, Low Voltage Reset and Low Voltage Detector coupled with excellent noise immunity and ESD protection ensure that reliable operation is maintained in hostile electrical environments.

A full choice of internal, external, low and high speed oscillator functions are provided including fully integrated system oscillators which require no external components for their implementation. The unique Holtek TinyPower technology also gives the devices extremely low current consumption characteristics, an extremely important consideration in the present trend for low power battery powered applications. The usual Holtek MCU features such as power down and wake-up functions, oscillator options, programmable frequency divider, etc. combine to ensure user applications require a minimum of external components.

The inclusion of flexible I/O programming features, Time-Base functions along with many other features ensure that the devices will find excellent use in applications such as smoke detectors, electronic metering, environmental monitoring, handheld instruments, household appliances,
electronically controlled tools, motor driving, home security systems and many others.