GENERAL DESCRIPTION

The MSM6895/MSM6896, developed especially for low-power and multi-function applications in ISDN telephone terminals, are single +5 V power supply CODEC LSI devices. The devices consist of the analog speech paths directly connectable to a handset, the calling circuit directly connectable to a piezosounder, the push-button key scanning interface between push buttons and control processors, the dial tone generator, the B-channel interface, the CODEC, and the processor interface. The functions can be controlled via the 8-bit data bus.

FEATURES

? Single +5 V Power Supply

? Low Power Dissipation

Power ON Mode : 20 mW Typ. 53 mW Max.

CODEC Power Down Mode : 10 mW Typ. 21 mW Max.

? In compliance with ITU-T’s companding law

μ-law : MSM6895

A-law : MSM6896

? Transmission clocks

Continuous CLK : 64, 128, 256 kHz

Burst CLK : 192, 384, 768, 1536, 2048 kHz

? Built-in PLL

? Built-in Reference Voltage Supply

? Ringing Tone : Controlled by processor, 9 modes

? Ringing Tone Combination : Controlled by processor, 6 modes

? Information Tone : Controlled by processor, 9 modes

? Built-in PB Tone Generator

? B-Channel Selectable

? General Latch Output for Speech path Control : 4 bits

? Watchdog Timer : 500 ms

? Key Scanning I/O

Output : 5 bits

Input : 8 bits

? Direct Connection to Handset

? Built-in Preamplifier for Loudspeaker

? Handfree Interface

? Digital and Analog Interface for the phone-conference speech paths

? Package:

80-pin plastic QFP (QFP80-P-1420-0.80-BK) (Product name : MSM6895GS-BK)

(Product name : MSM6896GS-BK)