Holtek Manuals

HT82V738 is a high performance audio DAC converter. It provides digital de-emphasis (32, 44.1 and 48kHz), external mute control and adjustment for serial data and clock. It can accept data at audio rates up to 96kHz. It performs within a wide dynamic range, high SNR ratio and has low clock jitter sensitivity. HT82V738 is an ideal DAC for DVD players, MP3 players and set-top box systems. It is also pin-compatible with CS4340.

HT8972 is an echo/surround effect processor designed for various audio systems including karaoke, television, sound equipment, etc. The chip consists of a built-in pre-amplifier, VCO or Voltage Control OSC, 40Kb SRAM, A/D and D/A converters, as well as delay time control logic. Its built-in 40Kb SRAM can generate delay time effect and can control the delay time value through the external VCO resistor.

The HT93214 is a series of dialers designed for low-cost telephone set applications with expandable features such as lock function, keytone, and LCD display interface. With a 4x4 keyboard, it performs normal tone/pulse switchable dialing and provides one-key redialing function with a 32-digit memory for speed dialing. An on-chip oscillator is built-in to work with an external 3.58MHz crystal or ceramic resonator for accurate timing. The HT93214 provides 300ms (F1 key) and 600ms (F2 key) of flash time; Tone dialing and 10pps, 20pps selection with 1/2 M/B ratio for pulse.

HT1087 series 0.5A general purpose LDO selection table, including adjustable output voltage and fixed output voltage two types, output voltage range is 1.5V~5.0V, with high accuracy, low voltage drop, low quiescent current and other features.

HT48RA3/HT48CA3 is a remote control type eight-bit microcontroller with a working voltage of 2.0V to 5.5V, up to 23 bidirectional input/output ports, support for PFD, HALT and wake-up functions to reduce power consumption, and other features.

HT49RV5/HT49CV5 is an 8-bit high-performance reduced instruction set microcontroller with a single-cycle instruction and a 2-stage pipeline architecture that makes it suitable for high-speed applications. The built-in VFD driver makes this microcontroller suitable for DVD, VCD, MP3, MP4, remote control and other products.

HT48E30 is an 8-bit MTP microcontroller produced by Holtek, with a working voltage of 2.2V – 5.5V and a maximum clock frequency of 8MHz.