GENERAL DESCRIPTION

The MSM7620 is an improved version of the MSM7520 with the same basic configuration. The MSM7620 includes following improvements: a modified through mode, timing control of the control pin input, and a thinner package. The MSM7620 also provides a pin-for-pin replacement with the MSM7520.

FEATURES

• Handles both acoustic echoes and telephone line echoes.

• Cancelable echo delay time:

MSM7620-001 ................. For a single chip: 23 ms (max.)

MSM7620-011 ................. For a cascade connection (can also be used for a single chip)

Master chip: 23 ms (max.)

Slave chip: 31 ms (max.)

Cancelable up to 213 ms (one master plus six slaves)

For a single chip: 23 ms (max.)

• Echo attenuation : 30 dB (typ.)

• Clock frequency : 18 MHz (36 MHz cannot be used)

External input and internal oscillator circuit are provided.

• Power supply voltage : 5 V (4.5 V to 5.5 V)

• Power consumption : 150 mW (typ.) When powered down: 20 mW (typ.)

• Package options:

32-pin plastic SSOP (SSOP32-P-640-0.80-K) (Product name : MSM7620-001GS-K)

64-pin plastic QFP (QFP64-P-1414-0.80-BK) (Product name : MSM7620-011GS-BK)