CXA1940N View Datasheet(PDF) - Sony Semiconductor

Part Name

Description

Manufacturer

CXA1940N

4ch. Read/Write Amplifier for Thin Film Head of Hard Disk Drive

Sony Semiconductor 

CXA1940N

Write unsafe detection circuit

Abnormal Write mode is detected.

In normal Write mode, WUS output turns to “Low” and in the following other conditions, WUS output turns to

“High”.

• Head input is open.

• Head input is shorted to GND.

• Write data frequency is abnormally low.

• No write current

• In read

• In power save

Power supply ON/OFF detection

VCC is monitored to avoid incorrecting Write.

Recording and Playback functions are inhibited as detected as abnormal when VCC decreases below the

power supply ON/OFF detector threshold voltage (VTH). When VCC is higher than VTH, the above inhibition is

released.

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