TA8189N

TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8189N Quad Preamplifier For Double Cassette Tape Recorder TA8189N The TA8189N is a quad pre amplifier designed for use in record / play back amplifier. It is suitable for double cassette tape recorder. Features · Play back amp · Built in input select switch. · Built in equalizer control switch. · Mixing output, for music selection. · Recording amp · Built in ALC detector circuit. · Operating supply voltage range: VCC (opr) = 4.0~13.5V (Ta = 25°C) Weight: 1.2g (typ.) 1 2002-10-30 Block Diagram TA8189N 2 2002-10-30 Terminal Explanation Terminal No. Symbol 1 Tape A in (ch1) 24 Tape A in (ch1) 2 Tape B in (ch2) 23 Tape B in (ch2) 3 PB NF (ch1) 22 PB NF (ch2) Function Tape play back input (play) Tape play back input (play / rec) Tape play back NF 4 / 21 Metal out Metal EQ switch 5 Pre out (ch1) 20 Pre out (ch2) Play back amp output 6 Mix out 7 GND 8 Metal / normal SW Mixing output GND Change over switch for metal mode and normal mode. TA8189N Equivalent Circuit — 3 2002-10-30 Terminal No. Symbol 9 Rec out (ch1) 16 Rec out (ch2) 10 Rec NF (ch1) 15 Rec NF (ch2) 11 Rec in (ch1) 14 Rec in (ch2) 12 GND Function Recording amp output Recording amp NF Recording amp input GND 13 ALC T.C Automatic level control (ALC) time constant terminal TA8189N Equivalent Circuit — 17 CG det. NF charge up circuit switching terminal 4 2002-10-30 Terminal No. Symbol Function 19 Tape A / tape B SW Pl...