Data Sheet AS2523, AS2524, AS2524B

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 1.5k

Ω-100pF)

+/- 1000V

Storage Temperature

-65°C to +125°C

Recommended operating conditions

Supply Voltage (generated internally)

Operating Temperature

-25°C to +70°C

Revision 1.13

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