Electronic Components Datasheet Search |
|
XRT5794ES Datasheet(PDF) 1 Page - Exar Corporation |
|
XRT5794ES Datasheet(HTML) 1 Page - Exar Corporation |
1 / 11 page XRT5794ES Evaluation System Rev. 2.00 5 GENERAL DESCRIPTION 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 120W balanced E1 operation. However, the information contianed in this manual enables the user to modify the hardware for E1 unbalanced 75W cable service, or T1 balanced 100W use. 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 W E1 use. It also applies to the other modes of operation if the appropriate impedence, cable type, and signal source changes are made. Power Requirements Power connections are made to banana jacks located in the upper left hand corner of the board. Power supply requirements are: VDD = +5.0 V ±5% at 850 mA maximum VSS = - 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 balanced 120W operation are one quarter inch, 3-circuit audio type jacks. Equipment connections 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-pair cable. The XR-T5794 exceeds G.703 maximum cable loss of requirement of 6.0 dB at 1.024 MHz. 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 120W 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 120W load resistor. Equipment-Side Signal Connections For convenience, access to 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. 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. |
Similar Part No. - XRT5794ES |
|
Similar Description - XRT5794ES |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |