HA12174 Datasheet | Hitachi Semiconductor

Description HA12173 series are silicon monolithic bipolar IC providing Dolby noise reduction system- , music sensor and PB equalizer system in one chip. Functions - PB equalizer - Dolby B/C-NR - Music sensor × 2 channel × 2 channel × 1 channel Features - Different type of PB equalizer characteristics selection (normal/chrome or metal) is available with fully electronic control switching built-in. - 2 type of input selection (RADIO/TAPE) is available. - Changeable to Forward, Reverse-mode for PB head with fully electronic control switching built-in. - Available to change music sensing level by external resistor. - Music sensing level selection is available with fully electronic control switching built-in. - Available to change frequency response of music sensor. - NR-ON/OFF and REC/PB fully electronic control switching built-in. - 4 type of PB-out level. - Available to allow mon PCB designs with HA12163 series. - Dolby is a trademark of Dolby Laboratories Licensing Corporation. A license from Dolby Laboratories Licensing Corporation is required for the use of this IC. HA12173 Series Ordering Information Operating voltage range- Products HA12173 HA12174 HA12175 HA12177 Note: PB-OUT level 300 m Vrms 450 m Vrms 580 m Vrms 775 m Vrms REC-OUT level 300 m Vrms 300 m Vrms 300 m Vrms 300 m Vrms Dolby-level 300 m Vrms 300 m Vrms 300 m Vrms 300 m Vrms Min 7.0V 8.0V 9.5V 12.0V Max 16V 16V 16V 16V 1. The minimum operating voltage of HA12173 series are defferent from the HA12163 series (Dolby B - type). Pin Description (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table show typical value) Pin No. 2, 41 Terminal name TAI Zin DC voltage Equivalent circuit Description Tape input 100 kΩ VCC/2 VCC / 2 4, 39 25 10, 33 RAI MSI HLS DET - 2.5 V Radio input Music sensor rectifier input Time constant pin for rectifier 11, 32 3 LLS DET BIAS - 0.28 V Reference current input Rev.1, Nov. 1992, page 2 of 66 HA12173 Series Pin...