MSM7502

更新时间： 2022-12-12 11:17:16

品牌	Logo	应用领域
冲电气 - OKI		解码器编解码器 PC
页数	文件大小	规格书
35页	195K
描述
Multi-Function PCM CODEC

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数据手册

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MSM7502 数据手册

E2U0023-28-81

This version: Aug. 1998

Previous version: Nov. 1996

¡ Semiconductor

MSM7502

¡ Semiconductor

MSM7502

Multi-Function PCM CODEC

GENERAL DESCRIPTION

The MSM7502, developed especially for low-power and multi-function applications in touch-

tone telephone sets and digital telephone terminals of digital PBXs, is a single +5 V power supply

CODEC device. The device consists of the analog speech paths directly connectable to a handset,

thecallingcircuitdirectlyconnectabletoapiezosounder, thepush-buttonkeyscanninginterface

betweenpushbuttonsandcontrolprocessors, thedialtonegenerator, them-law/A-lawCODEC,

and the processor interface. The functions can be controlled via 8-bit data bus.

For the CODEC of the MSM7502, an MSM7543 is used as a core CODEC, so the MSM7502

provides the available bit clock range wider than the family product MSM6895.

In addition, the MSM7502 performs the greater key interface function and offers the upgraded

side-tone level, receive level, and speaker pre-amplifier output level.

FEATURES

• Single +5 V Power Supply

• Low Power Dissipation

Power ON Mode

Power Saving Mode

: 30 mW Typ. 53 mW Max.

2 mW Typ. 5 mW Max.

• In compliance with ITU-T’s companding law

• Transmission clocks

: 64, 128, 256, 512, 1024, 2048 kHz

96, 192, 384, 768, 1536, 1544 kHz

• Built-in PLL

• Built-in Reference Voltage Supply

• Calling Tone Interval

• Calling Tone Combination

• Calling Tone Volume

: Controlled by processor

: Controlled by processor, 6 modes

: Controlled by processor, 4 modes

: Controlled by processor

• Ringing Tone Interval

• Ringing Tone Frequency

• Ringing Tone Level

: Controlled by processor, 6 modes

: Controlled by processor, 4 levels

• Built-in PB Tone Generator

• Built-in Speech path Control Switches

• General Latch Output for External Control : 2 bits

• Watch-dog Timer

: 500 ms

• Key Scanning I/O

Output

: 8 bits

Input

: 8 bits

: 1.2 kW driving available

• Direct Connection to Handset

• Built-in Pre-amplifier for Loud-speaker

• Hand-free Interface

• m-law/A-law Switchable CODEC

• LCD Deflection Angle Voltage

• Package :

: Controlled by processor, 8 levels

80-pin plastic QFP (QFP80-P-1420-0.80-BK) (Product name : MSM7502GS-BK)

1/35

12 3 4 5 6 7...35

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