New 12-bit High Resolution A/D MCU Product Release --- HT46R51/52/53/54

February 25, 2005

As four new additions to the Holtek range of 8-bit General Purpose A/D type MCUs, the HT46R51, HT46R52, HT46R53 and HT46R54 devices can be sub-divided according to their OTP Program Memory Capacities of 1K, 2K, 2K and 4K respectively. Internally, all devices possess a 12-bit Analog to Digital Converter along with a PWM converter output. According to the device chosen the internal A/D converter will have either 5 or 8 input channels and relies on an external voltage for its reference source. The number of available I/O pins varies is either 14 or 22, again depending upon which device is selected. Common to all devices are 88 bytes of internal RAM and a single 8-bit timer along with an external interrupt function, which is activated by an external signal on its interrupt pin. The addition of a PFD output enables audio frequencies to be generated on an external output pin. These devices contain many of the features found in other Holtek MCU devices such as excellent noise rejection capabilities, which when combined with their internal Watchdog function and Low Voltage Reset functions provide designers with a range of powerful devices with many protective features.

The internal 12-bit A/D converter inside each of these four new devices can sense the changing values transmitted by externally connected sensors, which when added to their excellent price/performance ratio, make them especially suitable for use in the battery charger application area, as well as other application areas such as automotive peripheral products and household electrical appliances.

The HT46R51 and HT46R52 are available in both 18-pin DIP and 20-pin SSOP package types while the HT46R53 and HT46R54 are available in 28-pin SKDIP and 28-pin SOP package types.