HA12211NT Datasheet | Hitachi Semiconductor

Description HA12211NT is silicon monolithic bipolar IC providing REC equalizer system, PB equalizer system and each electronic control switch in one chip. Functions - PB equalizer × 2 channel - REC equalizer × 2 channel - Each electronical control switch to change equalizer characteristics - REC mute - REC head return switch Features - REC equalizer is very small number of external parts.(4 types of frequency characteristics built-in) - PB equalizer built-in. (A/B input changing system, 4 types of frequency characteristics) - Independent PB sensitivity for A deck, B deck. - Normal-speed/high-speed, normal tape/chrome tape switching built-in. - Controllable from direct micro-puter output. - Available to reduce substrate-area because of high integration and small external parts. Pin Description , Equivalent Circuit (VCC = 10.5V, Vref = 5.25V, Ta = 25°C, No signal, The value in the table show typical value.) Pin No. 1 2 Pin Name VCC RECOUT (L) Note V = VCC V = Vref Equivalent Circuit Pin Description VCC Pin REC-EQ output 3 4 RECOUT (R) REC-RETURN V = Vref V’ = Vref REC Return V 5 pin, 6 pin I V’ 5 6 7 PB-IN B (L) PB-IN B (R) VREF V = Vref V’ = VCC / 2 10k V 10k GND V’ VCC PB B Deck input Reference PB-IN A(L) V =...