Datasheet > 821004

821004

更新时间： 2024-11-15 14:58:15

品牌	Logo	应用领域
瑞萨 - RENESAS		PC
页数	文件大小	规格书
16页	997K
描述
4-Channel PCM CODEC, 5.0V

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中文翻译

获取价格

数据手册

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821004 数据手册

QUAD NON-PROGRAMMABLE

PCM CODEC

821004J

DESCRIPTION

FEATURES

· 4 channel CODEC with on-chip digital filters

· Selectable A-law or m-law companding

· Master clock frequency selection: 2.048 MHz, 4.096 MHz or

8.192 MHz

The 821004J is a single-chip, four channel PCM CODEC with on-chip

filters. The device provides analog-to-digital and digital-to-analog

conversions and supports both a-law and m- law companding. The digital

filters in 821004J provides the necessary transmit and receive filtering for

voice telephone circuit to interface with time-division multiplexed systems.

All of the digital filters are performed in digital signal processors operating

from an internal clock, which is derived from MCLK. The fixed filters set

the transmit and receive gain and frequency response.

- Internal timing automatically adjusted based on MCLK and frame

sync signal

· Separate PCM and master clocks

· Single PCM port with up to 8.192 MHz data rate (128 time slots)

· Transhybrid balance impedance hardware adjustable via external

components

· Transmit gains hardware adjustable via external components

· Low power +5.0 V CMOS technology

· +5.0 V single power supply

In the 821004J the PCM data is transmitted to and received from the

PCM highway in time slots determined by the individual Frame Sync signals

(FSR_nand FSX_n, where n = 1-4) at rates from 256 KHz to 8.192 MHz. Both

Long and Short Frame Sync modes are available in the 821004J.

The 821004J can be used in digital telecommunication applications

such as PBX, Central Office Switch, Digital Telephone and Integrated Voice/

Data Access Unit.

· Package available: 32 pin PLCC

FUNCTIONAL BLOCK DIAGRAM

Anolog Front End

CH1

IIN1

FSX1

PCM TSA 1

FSR1

VOUT1

FSX2

PCM TSA 2

FSR2

Anolog Front End

CH2

IIN2

FSX3

VOUT2

PCM TSA 3

FSR3

DSP

FSX4

FSR4

PCM TSA 4

Anolog Front End

CH3

IIN3

VOUT3

TSC

PCM Interface

Anolog Front End

CH4

IIN4

VOUT4

PCLK

MCLK

Clock

PDN 1~ 4

Control

IREF

CNF

A/m

Reference Circuits

NOVEMBER 2020

INDUSTRIAL TEMPERATURE RANGE

DSC-6807/1

12 3 4 5 6 7...16

中文翻译

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