E2A0024-16-X1
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¡ Semiconductor
MSM7524
DTMF Transceiver
This version: Jan. 1998
MSM7524
Previous version: Nov. 1996
GENERAL DESCRIPTION
The MSM7524 is the single chip DTMF transceiver –generator/receiver– with the call progress
tone generator/detector and the special tone –1300 Hz in the first version, possible to be
modified– detector.
Each function block can be controlled by an external MCU via 4-bit processor interface.
The chip operates with +5 V single supply with low power consumption, and is suitable for
the telephone terminal equipment.
FEATURES
• Power supply voltage : +5 V
±10%
• Low power consumption
Operating mode : 8 mA Typ.
Power down mode : 10
mA
Typ.
• 4-bit processor interface
• Dynamic range of DTMF receiver : 40 dB
• Low signal distortion output from DTMF generator
• Call progress tone detector : 330 to 640 Hz
• Call progress tone generator : 350/400/440/480 Hz
• Special tone detector: 1300 Hz
±20
Hz (for FAX)
• 3.58 MHz crystal oscillator circuit on chip
• Package :
32-pin plastic SSOP
(SSOP32-P-430-1.00–K) (Product name : MSM7524GS-K)
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