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XR-T6166 반도체 회로 부품 판매점

Codirectional Digital Data Processor



Exar Corporation 로고
Exar Corporation
XR-T6166 데이터시트, 핀배열, 회로
...the analog plus companyTM
XR-T6166
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 Tolerance of 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 and Provide Outputs Indicating Slip Logic
Activity
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-T6166 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-T6166 and the companion
XR-T6164 line interface chip together form a CCITT
G.703 compliant 64kbps codirectional interface.
The XR-T6166 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-T6166 provides features which allow
the repetitions and deletions of both received and
transmitted data as clock skews and transients occur .
These slip occurrences are indicated by byte insertion
and deletion flags. Outputs are also provided for
extracted receive clock and clock recovery circuit loss of
lock.
ORDERING INFORMATION
Part No.
XR-T6166CD
Package
28 Lead 300 Mil JEDEC SOIC
Operating
Temperature Range
0°C to +70°C
XR-T6166ID
28 Lead 300 Mil JEDEC SOIC
–40°C to 85°C
Rev. 2.03
E2010
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z (510) 668-7010
1


XR-T6166 데이터시트, 핀배열, 회로
XR-T6166
PCMIN 19
TX2MHz 20
TS1T 10
TS2T 12
TTSEL 15
TX256kHz 17
ALARMIN 16
D
8 Bit Input Register
CLK
8
Byte
Deletion
time-slot
Mux
Control
Circuitry
Load
8 Bit Latch
8
CLK
8 Bit Output Register
Load
Q
Byte
Insertion
Octet
Counter
Violation
Insertion
Coding
Logic
D
CLK
Q
D
CLK
Q
Figure 1. XR-T6166 Transmitter Section Block Diagram
11 BDT
18 BIT
13 T+R
14 T-R
S+R 2
S-R 3
BLS 4
RX2MHz 5
TS1R 23
TS2R 24
RTSEL 27
BLANK 6
RXCK2MHz 9
Rev. 2.03
Byte Sync
Detection
CLK
Data
Decoder
CLK
Violation
Loss
Alarm
1 ALARM
time-slot
Mux
Time
Slot
Mux
Register
Select
Logic
DQ
8 Bit Reg 0
CLK
DQ
8 Bit Reg 1
CLK
REG 0 SEL
REG 1 SEL
time-slot
Clock
Recovery
128kHz Recovered Clock
Byte
Insertion
Byte
Deletion
28 PCMOUT
26 BIR
25 BDR
7 RXCKOUT
22 CS
Figure 2. XR-T6166 Receiver Section Block Diagram
2




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XR-T6165

Codirectional Digital Data Processor - Exar



XR-T6166

Codirectional Digital Data Processor - Exar Corporation