XRT5794ES

更新时间： 2024-11-11 03:13:51

品牌	Logo	应用领域
艾科嘉 - EXAR		/
页数	文件大小	规格书
11页	1111K
描述
Evaluation System

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中文翻译

获取价格

数据手册

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XRT5794ES 数据手册

XRT5794ES

Evaluation

System

GENERAL DESCRIPTION

balanced 120Ω operation are one quarter inch, 3-circuit

audio type jacks. Equipmentconnections should be made

with shielded twisted pair patch cords. The signal applied

to any inputs must be a CCITT G.703 compliant pulse that

may be attenuated by a twisted-paircable. The XR-T5794

exceeds G.703 maximum cable loss of requirement of 6.0

dB at 1.024 MHz.

The XR-T5794 demo board is

a 4.75” x 9.75”

double-sided circuit card that provides the support

circuitry necessary for a comprhensive evaluation of the

XR-T5794 CMOS Quad E1 Line Interface IC. three

board-mounted DIP switches allow complete testing of all

loop back, monitor, and transmitter power-down features.

The demo board is normally supplied configured for 120Ω

balanced E1 operation. However, the information

contianed in this manual enables the user to modify the

hardware for E1 unbalanced 75Ω cable service, or T1

balanced 100Ω use.

Similarly, transmitter outputs are labeleds TXOUT1

through TXOUT4 for the four channels. The monitor

channel output is labeled MONOUT. Connector types

and connection methods are identical to those specified

above for the recieve side. The transmitter output, when

terminated by a 120Ω resistor, is a pulse meeting the

G.703 template requirements. During demo board

evaluation, all ransmitters, including the monitor channel,

that are not powered down should be connected to either

a properly terminated cable, a piece of test equipment

contianing a termination, or a 120Ω load resistor.

BOARD OPERATION

Figures 1, 2 and Table 2 are the board component layout,

circuit diagram, and parts list respectively. The Demo

Board uses the same pin function and signal names as

the XR-T5794 data sheet. This user’s manual is designed

to be used in conjuction with the XR-T5794 data sheet.

The following description if for a demo board set up for

balanced 120 Ω E1 use. It also applies to the other modes

of operation if the appropriate impedence, cable type, and

signal source changes are made.

Equipment-Side Signal Connections

For

convenience, access

the

logic-level

equipment-side signals is provided by two groups of turret

terminals and also by two ribbon cable connectors. The

terminals are convient for simple tests while the ribbon

cable connectors reduce the amount of wiring necessary

to connect the entire equipment side of the demo board to

customer equipment.

Power Requirements

Power connections are made to banana jacks located in

the upper left hand corner of the board. Power supply

requirements are:

Header P1 and a group of terminals that provide channel

1 and 2 I/O are located below the XR-T5794. For

channels 3 and 4, P2 and a second group of pins are

located above the XR-T5794. P1 and P2 are dual-row 26

pin headers with only the odd-nimbered pins used to carry

signals. Even-numbered pins are grounded to minimize

ribbon cable crosstalk. Pin 13 is also grounded to provide

isolation between the transmit and receive directions.

= +5.0 V ‵ 5% at 850 mA maximum

= - 5.0 V ‵ 5% at 850 mA minimum

Line-Side Signals

Receiver signal inputs are labeled RXIN1 through RXIN4

for the four channels. The connectors supplied for

Rev. 2.00

12 3 4 5 6 7...11

中文翻译

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与XRT5794ES相关器件

型号	品牌	获取价格	描述	数据表
XR-T5794IJ	EXAR	获取价格	Quad E-1 Line Interface Unit
XRT5794IJ-F	EXAR	获取价格	暂无描述
XR-T5794IV	EXAR	获取价格	Quad E-1 Line Interface Unit
XRT5794IV-F	EXAR	获取价格	PCM Transceiver, 4-Func, CMOS, PQCC68, GREEN, PLASTIC, LCC-68
XRT5894	EXAR	获取价格	Four-Channel E1 Line Interface (3.3V or 5.0V)
XRT5894IV	EXAR	获取价格	Four-Channel E1 Line Interface (3.3V or 5.0V)
XR-T5894IV	EXAR	获取价格	DATACOM, PCM TRANSCEIVER, PQFP64, 14 X 14 MM, 1.4 MM HEIGHT, TQFP-64
XRT5897	EXAR	获取价格	Seven-Channel E1 Line Interface
XRT5897IV	EXAR	获取价格	Seven-Channel E1 Line Interface
XR-T5897IV	EXAR	获取价格	DATACOM, PCM TRANSCEIVER, PQFP100, 14 X 14 MM, 1.4 MM HEIGHT, TQFP-100

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