Datasheet > 78P2342-IGT/F/A07

78P2342-IGT/F/A07

更新时间： 2024-02-06 08:27:18

品牌	Logo	应用领域
美信 - MAXIM		PC 电信电信集成电路
页数	文件大小	规格书
36页	340K
描述
PCM Transceiver, 1-Func, PQFP100, LEAD FREE, LQFP-100

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技术参数
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78P2342-IGT/F/A07 技术参数

生命周期：	Obsolete	包装说明：	LEAD FREE, LQFP-100
Reach Compliance Code：	unknown	风险等级：	5.56
JESD-30 代码：	S-PQFP-G100	长度：	14 mm
功能数量：	1	端子数量：	100
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	LFQFP
封装形状：	SQUARE	封装形式：	FLATPACK, LOW PROFILE, FINE PITCH
认证状态：	Not Qualified	座面最大高度：	1.6 mm
标称供电电压：	3.3 V	表面贴装：	YES
电信集成电路类型：	PCM TRANSCEIVER	温度等级：	INDUSTRIAL
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	QUAD	宽度：	14 mm
Base Number Matches：	1

78P2342-IGT/F/A07 数据手册

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78P2342JAT

2-port E3/DS3/STS-1 LIU

with Jitter Attenuator

On the transmit side, when the ENDEC is enabled,

NRZ input data is encoded to Positive and Negative

AMI logic data following the B3ZS (for DS3/STS-1)

or HDB3 (for E3) substitution codes. The NRZ data

is input to the TPOS pin as shown below:

B3ZS/HDB3 ENDEC WITH LINE CODE VIOLATION

DETECT

The 78P2342JAT includes a selectable B3ZS/HDB3

Encoder/Decoder (ENDEC). The ENDEC function

can be enabled or disabled through pin selection or

ENDECB

TPOSx

TNEGx

bit/pin

0 / L

ENDECB

RPOSx

RNEGx

NRZ data

‘Don’t Care’

bit/pin

1 / H

Positive AMI

Negative AMI

Receive Line Code

Violation Indicator

0 / L

NRZ data

TRANSMITTER OPERATION

1 / H

Positive AMI

Negative AMI

Both transmitters are enabled by their corresponding

TXEN bit. When enabled, each transmitter accepts

logic level clock and data signals and generates

current pulses on the LOUTPx and LOUTNx pins.

When properly connected to a 1:2CT center-tapped

transformer, a standards compliant AMI pulse is

When the ENDEC is enabled, the decoder

generates a composite NRZ logic data stream

following the B3ZS (for DS3/STS-1) or HDB3 (for E3)

substitution codes via the RPOSx pins:

generated which can drive a 75

Ω coaxial cable.

The decoder also detects Receive Line Code

Violations (RLCV) and outputs a pulse via the

RNEG pin. Three different classes of line code

violations are detected.

When the recommended transformer is used and

when DS3 mode is selected, the transmitted pulse

shape at the end of the 75

Ω terminated cable of 0 to

450 feet will fit the DS3 template in ANSI T1.102-

1993 and Telcordia GR-499-CORE. For STS-1

applications, the transmitted pulse for a short cable

meets the requirements of Telcordia GR-253-CORE.

For E3 applications, the transmitted pulse for a short

cable meets the requirements of ITU-T G.703.

1) Too many zeros:

More than two (three)

consecutive zeros in B3ZS (HDB3) mode.

2) Not enough zeros between bipolar pulse (B)

and bipolar violation pulse (V): (B,V) for B3ZS.

(B,V) or (B,0,V) for HDB3.

3) Code violation: Even number of bipolar pulses

(B) detected between bipolar violation pulses

(V).

In either DS3 and STS-1 modes, the LBOx pin or

LBO bit should be set high for short cable (< 225 ft),

and should be set low for long cable (> 225 ft). The

LBO settings are ignored in E3 mode.

When the ENDEC is disabled, the 78P2342JAT

outputs a dual rail data stream via the RPOSx and

RNEGx pins. In this mode, the Framer/Mapper

providing the ENDEC function typically detects Line

Code Violations.

RCLK/TCLK POLARITY REVERSAL

To simplify the interface with various framer circuitry,

TCLK polarity can be internally inverted by setting

the TCLKP bit, and RCLK polarity can be inverted

by setting the RCLKP bit. Both bits are located in

the Master Control Register (MSCR).

REMOTE (DIGITAL) LOOPBACK

When the Register Control bit, REGEN, is disabled

and the LPBKx pin is floating; or when the Register

Control bit, REGEN, is enabled and the RLBK bit is

set, RCLKx, RNEGx, and RPOSx outputs are

internally looped back to the TCLKx, TNEGx, and

TPOSx inputs respectively.

Page 4 of 36



2005 Teridian Semiconductor Corporation

Rev 2.2

1 2 345 6 7...36

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与78P2342-IGT/F/A07相关器件

型号	品牌	描述	获取价格	数据表
78P2342-IGTR	TDK	PCM Transceiver, 1-Func, PQFP100, LQFP-100	获取价格
78P2342-IGTR/A07	MAXIM	PCM Transceiver, 1-Func, PQFP100, LQFP-100	获取价格
78P2342JAT	TERIDIAN	2-port E3/DS3/STS-1 LIU with Jitter Attenuator	获取价格
78P2342JAT-IEL	TDK	PCM Transceiver, 1-Func, PQFP100, LQFP-100	获取价格
78P2342JAT-IEL/A07/F	TDK	Digital Transmission Interface, E-3, PQFP100	获取价格
78P2342JAT-IEL/A07R	TDK	Digital Transmission Interface, E-3, PQFP100	获取价格

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