MSM7580

更新时间： 2024-01-22 19:41:01

品牌	Logo	应用领域
冲电气 - OKI		转换器 PC
页数	文件大小	规格书
18页	207K
描述
ITU-T G.721 ADPCM TRANSCODER

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MSM7580 技术参数

生命周期：	Transferred	零件包装代码：	SOIC
包装说明：	SOP,	针数：	28
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.42	其他特性：	FULL DUPLEX
压伸定律：	A/MU-LAW	滤波器：	NO
JESD-30 代码：	R-PDSO-G28	长度：	18.5 mm
功能数量：	1	端子数量：	28
工作模式：	SYNCHRONOUS	最高工作温度：	80 °C
最低工作温度：	-30 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	认证状态：	Not Qualified
座面最大高度：	2.5 mm	最大压摆率：	10 mA
标称供电电压：	5 V	表面贴装：	YES
电信集成电路类型：	ADPCM CODEC	温度等级：	COMMERCIAL EXTENDED
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	宽度：	8.8 mm
Base Number Matches：	1

MSM7580 数据手册

¡ Semiconductor

MSM7580

PIN AND FUNCTIONAL DESCRIPTIONS

GND

Ground, 0 V.

SIP1, SOP1

PCM serial data input (SIP1) and output (SOP1) for Channel 1.

SOP1 is an open-drain output, which goes into a high impedance state after a continuous 8-bit

serial data output.

SIP2, SOP2

PCM serial data input (SIP2) and output (SOP2) for Channel 2.

SOP2 is an open-drain output, which goes into a high impedance state after a continuous 8-bit

serial data output.

PAD/ MUTE

Control input for the selection of PAD or MUTE mode.

Whendigital"1"isinput,thePADmodeisselectedandwhendigital"0"isinput,theMUTEmode

is selected.

THR1, THR2

Control pins for the data through modes.

THR1 and THR2 are for Channel 1 and Channel 2, respectively. The data-through mode is

selected when digital “1” is applied to THR1 and THR2. In this mode, 8-bit serial input data

applied to SIA1 and SIA2 (ADPCM data input) is passed to the PCM serial data output pins,

SOP1 and SOP2, without any data modification. SOP1 and SOP2 go to the high impedance state

after the output of 8-bit data has been applied to SIA1 and SIA2.

Conversely 8-bit serial input data applied to SIP1 and SIP2 (PCM data input) is passed to

ADPCM serial data output pins, SOA1 and SOA2, without any data modification.

SOA1 and SOA2 go to the high impedance state after the output of 8-bit data has been applied

to SIP1 and SIP2.

Since ADPCM and PCM data interfaces have the mutually independent signal input pins for

synchronizing signals the time slots for data input and output can be exchanged between them.

Sometimingatwhichdatamaybedeletedorduplicatedasdescribedin"NotesonUsage"should

not be used.

MUTE1, MUTE2

Setting a digital "1"at these pins sets the PCM output to the idle pattern state regardless of the

ADPCM input data, when the MUTE mode is selected by the PAD/MUTE pin.

When the PAD mode is selected, the PCM output has a 12 dB loss.

Normally, these pins are set to a digital "0".

When the data through mode is selected, the function of these pins is invalid.

4/17

1 2 345 6 7...18

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