HA12207NT Datasheet | Hitachi Semiconductor

Description HA12207NT is silicon monolithic bipolar IC providing PB equalizer, REC equalizer system and each electronic control switch in one chip. Functions - PB equalizer - REC equalizer - REC MUTE - REC head return switch × 2 channel × 2 channel - Each electronic control switch to change REC/PB etc. Features - REC equalizer is very small number of external parts, built-in 2 types of frequency characteristics. - PB equalizer circuit built-in. - REC /PB of high speed mode are possible with TYPE 1(Normal tape). - Controllable from direct micro-puter output. - Available to reduce substrate-area because of high integration and small external parts. - As the pins arrangement resembles HA12185NT, it can design the board that is replaced with HA12185NT. Pin Description , Equivalent Circuit (VCC = 10.5V, Vref = 5.6V, 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 VCC I REC return V 5 pin, 6 pin V’ I GND 5 6 7 PB-IN B (L) PB-IN B (R) VREF V = Vref V’ = VCC / 2 PB B Deck input Reference + - PB-IN 10k V 10k GND V' VCC PB-IN A (L) V =...