XRT5794ES-PLCC Exar, XRT5794ES-PLCC Datasheet

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XRT5794ES-PLCC

Manufacturer Part Number
XRT5794ES-PLCC
Description
Peripheral Drivers & Components - PCIs 4 CH E1 AFE
Manufacturer
Exar
Datasheet

Specifications of XRT5794ES-PLCC

Product Category
Peripheral Drivers & Components - PCIs
Rohs
yes
FEATURES
GENERAL DESCRIPTION
The XR-T5794 is an optimized line interface unit, built
using low power CMOS technology. The device contains
four independent E1 channels for primary rate, PCM
applications up to 2.048Mbps. Each channel performs
the driver and receiver functions necessary to convert
bipolar signals to TTL/CMOS compatible logic levels and
vice versa.
balanced line interfaces on each channel, thereby
providing the user an option of reducing system cost and
board space by replacing the transformer with a
capacitor.
Each of the four drivers can be independently disabled,
allowing
management.
compliant. Moreover, the return loss is at least 18dB over
a frequency range of 51kHz to 3.072MHz.
The slicing circuit in the receive path is able to tolerate a
maximum of 12dB of cable loss with a minimum input
ORDERING INFORMATION
Meets CCITT G.703 Pulse Mask Template for
2.048Mbps (E1) Rates
Transmitter and Receiver Interfaces Can Be:
– Single Ended, 75 Capacitive or Transformer
– Balanced, 100 or 120 Transformer Coupled
Minimum Return Loss is 20dB (Receive) and 18dB
(Transmit), Exceeds G.703 and ETSI 300 166
Specifications
Bipolar Outputs can be Disabled Individually (High Z
Outputs)
System Interface is TTL Compatible on Digital Input
and TTL/CMOS Compatible On Digital Output Pins
Rev. 2.02
1994
Coupled
maximum
The device supports single ended or
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538
Output pulses are fully CCITT G.703
XR-T5794IV
XR-T5794IJ
Part No.
flexibility
...the analog plus company
in
system
80 Lead TQFP (14x14x1.4 mm)
68 Lead PLCC
power
Package
1
APPLICATIONS
sensitivity of 600mV over the operating temperature
range. Return loss on the receive interfaces is minimum
20dB from 51kHz to 3.072MHz.
Local and remote loopbacks can be performed on any of
the four channels.
detection circuitry and a LOS pin is provided for each
input. A fifth transmitter has been provided to support
dedicated monitoring and testing purposes on any of the
eight bipolar paths. For designers not requiring the fifth
(monitor) driver, EXAR offers the XR-T5793, a pin
compatible version of the XR-T5794.
The XR-T5794 is targeted for multi-line E1 line card
applications where real estate, low power consumption
and back-up redundancy are critical. Also, the device
may be used in T1 applications (1.544Mbps) which do not
require meeting the DSX-1 cross connect pulse template.
TM
Individual Channel Loss of Signal Detection, Local
and Remote Digital Loopback
Fifth Driver For Monitoring and Testing
Low Power, CMOS Technology
Over-temperature Protection
Multi-Line E1 Interface Cards
E1 Network Equipment
– Multiplexers
– Cross Connects
– Switching Systems
Fault Tolerant Systems
(510) 668-7000
Temperature Range
A separate loss of signal (LOS)
-40 C to +85 C
-40 C to +85 C
Operating
(510) 668-7017
XR-T5794
Quad E-1 Line
Interface Unit
June 1997-3

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XRT5794ES-PLCC Summary of contents

Page 1

... A fifth transmitter has been provided to support dedicated monitoring and testing purposes on any of the eight bipolar paths. For designers not requiring the fifth (monitor) driver, EXAR offers the XR-T5793, a pin compatible version of the XR-T5794. The XR-T5794 is targeted for multi-line E1 line card ...

Page 2

XR-T5794 BLOCK DIAGRAM 75 Unbalanced (Without Transformer) Impedance Selectable Receivers. Return Loss Exceeds G.703 120 Balanced (or 100 ) Impedance Selectable Tristate Drivers LOS Threshold Based on G.775 Return Loss Exceeds ETSI 300 166 120 ,100 or 75 balanced TX ...

Page 3

PIN CONFIGURATION MONEN TCLK4 TXPOS4 TXNEG4 TXCLK3 TXPOS3 TXNEG3 LOOPEN4 LOOPEN3 RXPOS3 RXNEG3 RXPOS4 RXNEG4 TXEN2 TXEN1 TXOUT1 TXOUT2 AGND TV SS MOUT TV DD AGND TXOUT3 TXOUT4 TXEN4 ...

Page 4

XR-T5794 PIN DESCRIPTION PLCC SQFP Pin # Pin # Symbol Type 1 71 MOUT AGND GND 4 74 TXOUT3 TXOUT4 8 ...

Page 5

PIN DESCRIPTION (CONT’D) PLCC SQFP Pin # Pin # Symbol Type 25 18 RXNEG4 26 19 LPMOD4 28 22 LPMOD3 29 23 RXIN4 30 24 LOS4 31 25 LOS3 32 26 RXIN3 33 27 ...

Page 6

XR-T5794 PIN DESCRIPTION (CONT’D) PLCC SQFP Pin # Pin # Symbol Type 43 38 LPMOD1 44 41 RXNEG1 46 44 RXPOS1 47 45 RXNEG2 48 46 RXPOS2 ...

Page 7

PIN DESCRIPTION (CONT’D) PLCC SQFP Pin # Pin # Symbol Type 66 68 TXOUT2 67 69 AGND GND 39, NC 40, 61, 62, 80 Rev. 2.01 Description O Transmitter 2 Output. Transmitter 2 ...

Page 8

XR-T5794 DC ELECTRICAL CHARACTERISTICS Test Conditions - all V A Symbol Parameter DC Parameters Supply Positive Supply Negative SS Inputs V High Level Input ...

Page 9

AC ELECTRICAL CHARACTERISTICS Test Conditions - all V A Symbol Parameter V Output Pulse Amplitude (75 ) TXOUT V Output Pulse Amplitude (120 ) TXOUT V Output Pulse Amplitude (100 ) ...

Page 10

XR-T5794 TXPOS(n) TXNEG(n) TXCLK(n) TXOUT(n) Figure 2. Transmit Timing Diagram RXIN T 7 RXPOS RXNEG Figure 3. Receive Timing Diagram TXCLK(n) Figure 4. Transmit Clock Timing Rev. 2. ...

Page 11

RETURN LOSS REQUIREMENTS Transmit Interface 51kHz to 102kHz 102kHz to 2.048MHz 2.048MHz to 3.072MHz Receive Interface 51kHz to 102kHz 102kHz to 2.048MHz 2.048MHz to 3.072MHz Note The return loss has been measured on the evaluation board coupled via a capacitor ...

Page 12

XR-T5794 SYSTEM DESCRIPTION This device is a quad E1 transceiver which provides electrical interface for 2.048Mbps applications. Its unique architecture includes four receiver circuits that convert CCITT G.703 compliant bipolar signals to TTL compatible logic levels. Likewise, in the other ...

Page 13

Output Transformer Selection The 1:1.265 ratio output transformer is recommended for the XR-T5794 because this ratio gives the best possible transmitter output return loss for 120 service. However, other transformers may provide an adequate return loss for many applications. The ...

Page 14

XR-T5794 10 100% 10% 50% 10% 0% 10% Note: V corresponds to the nominal peak value Figure 8. CCITT G.703 Pulse Template Rev. 2.01 269 ns (244 + 25) 20% 194 ns (244 – 50) 20% 244 ns ...

Page 15

LEAD PLASTIC LEADED CHIP CARRIER SYMBOL Note: The control dimension is ...

Page 16

XR-T5794 80 LEAD THIN QUAD FLAT PACK Seating Plane A 1 SYMBOL Note: The control dimension is the millimeter column Rev. ...

Page 17

Rev. 2.01 Notes 17 XR-T5794 ...

Page 18

XR-T5794 Rev. 2.01 Notes 18 ...

Page 19

Rev. 2.01 Notes 19 XR-T5794 ...

Page 20

... While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ...

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