Usage Notes

Control Pin Logic

• HA-SW (EP/SP mode switching): pin 3

GND < the pin 3 DC level < 1.5 V: SP mode

1.5 V < the pin 3 DC level < 5 V: EP mode

• H.SYNC input: pin 5

The pin 5 DC level > 1.5 V: The horizontal synchronization period

In record mode: Used as the REC-AGC-AMP synchronization block gate pulse.

• REC/REC-MUTE/PB switching: pin 11

GND < the pin 11 DC level < 1.0 V: Playback mode

1.0 V < the pin 11 DC level < 3.0 V: Record mode with recording

muted.

3.0 V < the pin 11 DC level < 5.0 V: Record mode

Envelope detection characteristics: pin 6

The LA70001 provides a built-in playback signal envelope detection circuit so that the tracking adjustment can be made

automatic.

No. 5709-6/8

LA70001, 70001M

The pin 7 playback output level (mVp-p)

The pin 6 detected DC level (V)

Envelope Detection Voltage Characteristics

EP when an 18 k

Ω resistor is connected at pin 6.

SP when an 18 k

Ω resistor is connected at pin 6.