Data Sheet AS2523, AS2524, AS2524B

Revision 1.12, Preliminary

Page 11 of 19

Parallel Interface on AS2524 and AS2524B

Input Signal on Pin

XPD

xMute

HF

Mode

0

0

0

Power down

0

0

1

Power down

0

1

0

Power down

0

1

1

Power down

1

0

0

Tone mode

1

0

1

Tone mode

110

Handset mode

1

1

1

Handsfree mode

Power down mode

For low power consumption the analog part is turned off during activated power down mode. The Power down mode is used

during Flash and Pulse dialing and for On-hook operation.

Handset mode

Speech mode is Handset mode (M1-M2, RO active; LO deactivated)

Parameter

AS2524

AS2524B

LI Voltage

4.5V

4.5V

LLC

No LLC

LLC high (45mA to 75mA)

TX-Gain

+37dB

+43dB

RX-Gain

+7.5dB

+7.5dB

Rx-Softclip

Off

Off

Tx-Softclip

Off

Off

Tone

Off

Off

Handsfree mode

Speech mode is Handsfree mode (M3-M4, RO active; LO active)

Parameter

AS2524

AS2524B

LI Voltage

4.5V

4.5V

LLC

No LLC

LLC high (45mA to 75mA)

HF TX-Gain

+46dB

+52dB

HF RX-Gain

+34dB

+34dB

Rx-Softclip

Off

Off

Tx-Softclip

Off

Off

Tone

Off

Off

BNM

On

On