Data Sheet AS2523, AS2524, AS2524B

Revision 1.13

Page 12 of 19

Tone mode

This mode is used to send DTMF and FSK data to the line.

Speech mode is Tone mode (M1-M2;M3-M4 muted, Rx path muted, RO and LO active)

Parameter

AS2524

AS2524B

LI Voltage

4.5V

4.5V

LLC

No LLC

LLC high (45mA to 75mA)

Tone TX-Gain

+14dB

+14dB

Confidence tone

level

-36dB@Ro –15dB@Lo

relative to Pin LS

-36dB@Ro –15dB@Lo

relative to Pin LS

Loudhearing AS2524 and AS2524B (feature only available as DIE)

Speech mode is Loudhearing (M3-M4, RO active; LO activated).

Loudhearing can be activated via a bond-option (see document “AS2523/24 Delivery as Dice”).

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

Tone

Off

Off

Slow_rec

On

On

RECV pin

Deactivated

Deactivated

Highpass

2000kHz (10nF from TXO->TXV)

2000kHz (10nF from TXO->TXV)

Voice switching speed

120ms/6dB

120ms/6dB

RX-Offset

300mV

300mV

Electrical characteristics

Electrical characteristics are measured with the Test Circuit

application. Typical mean values will not be tested.

Absolute maximum ratings

Positive Supply Voltage

Input Current

+/- 25mA

Input Voltage (LS)

Input Voltage (LI, CS)

Input Voltage (STB, RI)

Digital Input Voltage

Electrostatic Discharge (HBM 1.5kΩ-100pF)

+/- 1000V

Storage Temperature

-65°C to +125°C

Recommended operating conditions

Supply Voltage (generated internally)

Operating Temperature

-25°C to +70°C