Description
The CXA3238TN/CXA3239TN is a Read/Write amplifier for GMR-Ind (Giant Magneto Resistive Inductive) heads used in hard disk drives, and is capable of supporting up to six channels.

Features
• +5 V and –3 V power supply.
• Current bias voltage sense type.
• Drives up to six heads (CXA3238TN)
• Drives up to four heads (CXA3239TN)
• Low power 180 mW at Read
• Differential read amplifier gain ; ×140/190 (RMR=50 Ω)
• Input noise of 0.77 nV/ √ Hz (typ.), RMR=50 Ω, IB=6.0 mA.
• Recovery time write to read ; 300 nsec. (typ.)
• Write data is triggered by differential P-ECL signal.
• Servo bank write. (All channels)
• Write unsafe detection circuit.
• Serial port …
    Head selection
    MR bias
    Write current

Applications
    Hard disk drives with GMR-Ind heads.