Description
The CXA3171N is a Read/Write Amplifier for the special three terminal MIG head of hard disk drive and designed to handle up to 4 channel heads.

FEATUREs
• Operate on single +5 V power supply
• Low power consumption
    Read : 95 mW
    Write : 115 mW + IW × 5
• Designed for special three terminal MIG heads
• Read amplifier emitter follower output featuring 420 times gain (typ).
• Differential input capacitance for Read : 6.7 pF (typ)
• Input noise : 0.46nV / √ Hz (typ)
• Differential Head voltage swing : 9 Vp-p (typ)
• Differential P-ECL write data input
• Built-in write unsafe detection circuit.
• Built-in Servo write function (2/4 ch).
• Built-in IC protection circuit for short of head and GND.
• Read data outputs are high impedance in write mode.
• Built-in supply voltage monitor circuit prohibits incorrect write during power on or abnormal voltage.
• Self switching damping resistance (RD=420 Ω).

Function
    Read, Write and Write unsafe detection for HDD, power supply ON/OFF detection.