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XR-T6165 Schematic ( PDF Datasheet ) - Exar

Teilenummer XR-T6165
Beschreibung Codirectional Digital Data Processor
Hersteller Exar
Logo Exar Logo 




Gesamt 15 Seiten
XR-T6165 Datasheet, Funktion
...the analog plus companyTM
XR-T6165
Codirectional Digital
Data Processor
FEATURES
D Low Power CMOS Technology
D All Receiver and Transmitter Inputs and Outputs are
TTL Compatible
D Transmitter Inhibits Bipolar Violation Insertion for
Transmission of Alarm Conditions
D Alarm Output Indicates Loss of Received Bipolar
Violations
D Up to 125µs Variance of Data Transfer Timing in
Both Transmit and Receive Paths Allows Operation
in Plesiochronous Networks
D Both Receiver and Transmitter Perform Byte
Insertion or Deletion in Response to Local Clock
Slips
APPLICATIONS
Dec 2010
D CCITT G.703 Compliant 64kbps Codirectional
Interface
D Performs the Digital and Analog Functions for a
Complete 64kbps Data Adaption Unit (DAU) When
Used With the XR-T6164
GENERAL DESCRIPTION
The XR-T6165 is a CMOS device which contains the
digital circuitry necessary to interface both directions of a
64kbps data stream to 2.048Mbps transmit and receive
PCM time-slots. The XR-T6165 and the companion
XR-T6164 line interface chip together form a CCITT
G.703 compliant 64kbps codirectional interface.
The XR-T6165 contains separate transmit and receive
sections. The transmitter transforms 8 bit serial data from
a 2.048Mbps time-slot into an encoded 64kbps data
stream. The receiver , which performs the reverse
operation, decodes the 64kbps data, extracts a clock
signal, and then outputs the data to a 2.048Mbps
time-slot. The XR-T6165 provides features which allow
the repetitions and deletions of both received and
transmitted data as clock skews and transients occur.
ORDERING INFORMATION
Part No.
XR-T6165CD
XR-T6165ID
Package
24 Lead 300 Mil JEDEC SOIC
24 Lead 300 Mil JEDEC SOIC
Operating
Temperature Range
0°C to +70°C
–40°C to +85°C
Rev. 2.04
E3121
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z (510) 668-7010
1






XR-T6165 Datasheet, Funktion
XR-T6165
ELECTRICAL CHARACTERISTICS (CONT’D)
Symbol Parameter
AC Electrical Characteristics (Cont’d)
Transmitter (Cont’d)
tTXL
TX2MHz Low Time
tTXCLK TX2MHz Period
tKXH
TX256kHz High Time
tKXL
tKXCLK
TX256kHz Low Time
TX256kHz Period
Min. Typ. Max. Unit Conditions
244
488
1.95
1.95
3.9063
ns Figure 4
ns Figure 4
µs
µs
µs
Specifications are subject to change without notice
ABSOLUTE MAXIMUM RATINGS
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.0.V
Operating Temperature . . . . . . . . . . . . .0°C to +70°C
Storage Temperature . . . . . . . . . . . . -.65°C to +150°C
Magnetic Supplier Information:
Pulse
Telecom Product Group
P.O. Box 12235
San Diego, CA 92112
Tel. (619)674-8100
Fax. (619)674-8262
Transpower Technologies, Inc.
24 Highway 28, Suite 202
Crystal Bay, NV 89402-0187
Tel. (702) 831-0140
Fax. (702) 831-3521
Rev. 2.04
6

6 Page









XR-T6165 pdf, datenblatt
XR-T6165
Codirectional Interface Pulse Masks
Figure 8 and Figure 9 show the CCITT G.703 64kbps
codirectional interface pulse masks for single and double
pulses respectively of either polarity. Note that this mask
is for the pulse measured at the XR-T6164 transmitter
output (application circuit shown in Figure 6) when
terminated with a 120resistor.
V
1.0
ÎÎÎ 3.12µs
0.5 (3.9 -0.78)
Î 3.51µs
(3.9 -0.39)
Î 3.9µs
Î0
ÎÎ 4.29µs
(3.9 + 0.39)
6.5µs
(3.9 + 2.6)
7.8µs
(3.9 + 3.9)
Figure 8. Mask for a Single Pulse
V
Î1.0
ÎÎ 7.02µs
(7.8 - 0.78)
Î0.5 7.41µs
(7.8 - 0.39)
Î 7.8µs
ÎÎÎ0
8.19µs
(7.8 + 0.39)
10.4µs
(7.8 + 2.6)
11.7µs
(7.8 + 3.9)
Figure 9. Mask for Double Pulse
Rev. 2.04
12

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