XRT81L17IV-F [EXAR]
Telecom IC,;
| 型号： | XRT81L17IV-F |
| 厂家： | 
EXAR CORPORATION |
| 描述： | Telecom IC, |
| 文件： | 总4页 (文件大小：31K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ꢀꢁ
PRELIMINARY
XRT81L17
SEVEN CHANNEL T1 TRANSCEIVER WITH CLOCK RECOVERY UNIT
OCTOBER 2002
REV. P1.0.0
GENERAL DESCRIPTION
• On-chip Clock Recovery Circuit
• On-chip Encoder and Decoder that can either be
The XRT81L17 is a fully integrated Seven Channel
line interface unit with clock recovery circuit for
T1(1.544Mbps) 100Ω, applications.
enabled or disabled.
• Detects and Clears LOS (Loss of Signal)
• Logic inputs accept either 3.3V or 5V levels.
• Operates over Industrial Temperature range.
Each channel consists of a receiver with equalizer for
reliable data and clock recovery, and a transmitter
which accepts either a single or dual-rail inputs for
signal transmission to the line using low impedance
line driver.
• Supports Analog, Remote, Digital Loop-Back
Modes
The XRT81L17 provides both Serial microprocessor
interface as well as Hardware mode for programming
and control. The B8ZS encoding and decoding
functions are included in the device that can be
disabled as demanded by the system.
• Supports both Hardware and Serial Microprocessor
interface for programming
• Low power dissipation
• Single +3.3V Supply Operation
• 128 pin TQFP package
The XRT81L17 provides a variety of loop-back and
diagnostic features. This device uses a low power
CMOS design and requires only a single 3.3V supply
and all digital inputs are 5V tolerant.
APPLICATIONS
• T1 Digital Cross-Connects (DSX-1)
• ISDN Primary Rate Interface
• CSU/DSU T1 Interface
FEATURES
• Fully integrated seven channel transceivers with
clock recovery units for T1 applications.
• LAN/WAN Routers
• On-chip Receive Equalizer and Transmit Pulse
Shaper for DS1 Digital Cross Connect.
• Public switching Systems and PBX Interfaces
• T1 Multiplexer and Channel Banks
FIGURE 1. BLOCK DIAGRAM OF THE XRT81L17
Channel 7
Channel 6
Channel 5
Channel 4
Channel 3
Channel 2
Timing
Generator
MClk
TClk
TPOS/TDATA
Timing
Control
TTIP
TX Pulse
Shaper
MUX
Encoder
Line
Driver
TNEG/CODE
TRing
TClkP
TAOS
Analog
Loopback
Remote
Loopback
SDI
SDO
SClk
Local
Loopback
Serial
Processor
Interface
CS
LOS
LOS
Detect
RClkP
RTIP
RRing
RClk
RPOS
RNEG/LCV
Receive
Equalizer
Peak
Detector
Data & Timing
Recovery
MUX
Decoder
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com
XRT81L17
ꢀꢁ
SEVEN CHANNEL T1 TRANSCEIVER WITH CLOCK RECOVERY UNIT
REV. P1.0.0
PRELIMINARY
ORDERING INFORMATION
PART NUMBER
PACKAGE
OPERATING TEMPERATURE RANGE
-40°C to +85°C
XRT81L17IV
128 Lead TQFP (14 x 14 x 1.4mm)
FIGURE 2. PIN OUT OF THE XRT81L17
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
97
98
RCLK_6
RNEG_1/LCV_1
RPOS_1/RDATA_1
RLOS_3
RNEG_6/LCV_6
RPOS_6/RDATA_6
RLOS_6
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
RCLK_3
RCLK_5
RNEG_3/LCV_3
RPOS_3/RDATA_3
AVDD
RNEG_5/LCV_5
RPOS_5/RDATA_5
RLOS_5
AGND
VDD
GND
TCLK_1
TPOS_1/TDATA_1
TNEG_1/CODE_1
TAOS_1
TCLK_5
TPOS_5/TDATA_5
TNEG_5/CODE_5
TAOS_5
TCLK_3
TPOS_3/TDATA_3
TNEG_3/CODE_3
TAOS_3
CS/B3
SClk/B2
R/W/B1
SDI/O/LBM
TAOS_6
TNEG_6/CODE_6
TPOS_6/TDATA_6
TCLK_6
XRT81L17
TAOS_2
TNEG_2/CODE_2
TPOS_2/TDATA_2
TCLK_2
TAOS_0
TNEG_0/CODE_0
TPOS_0/TDATA_0
TCLK_0
GND
VDD
TAOS_4
TNEG_4/CODE_4
TPOS_4/TDATA_4
TCLK_4
GND
VDD
RPOS_2/RDATA_2
RNEG_2/LCV_2
RCLK_2
RLOS_4
RPOS_4/RDATA_4
RNEG_4/LCV_4
RCLK_4
RLOS_2
RPOS_0/RDATA_0
RNEG_0/LCV_0
2
ꢀꢁ
XRT81L17
SEVEN CHANNEL T1 TRANSCEIVER WITH CLOCK RECOVERY UNIT
REV. P1.0.0
PRELIMINARY
ORDERING INFORMATION
PART NUMBER
PACKAGE
OPERATING TEMPERATURE RANGE
-40°C to +85°C
XRT81L17IV
14 x 14 x 1.4 mm 128 Pin TQFP
PACKAGE DIMENSIONS - 14X14 MM, 128 PIN PACKAGE
128 LEAD THIN QUAD FLAT PACK
(14 x 14 x 1.4 mm, TQFP)
Rev. 1.00
D
D1
96
65
97
64
D1
D
33
128
1
32
e
B
A2
C
A
α
Seating Plane
A1
L
INCHES
MILLIMETERS
SYMBOL
MIN
MAX
0.063
0.006
MIN
MAX
1.60
0.15
A
A1
A2
B
0.055
0.002
1.40
0.05
1.35
0.13
0.09
15.80
13.90
0.053
0.005
0.004
0.622
0.547
0.057
0.009
0.008
0.638
0.555
1.45
0.23
C
0.20
D
16.20
14.10
D1
e
0.0157BSC
0.40BSC
L
0.018
0o
0.030
7o
0.45
0o
0.75
7o
α
Note: The control dimension is in millimeter.
3
ꢀꢁ
SEVEN CHANNEL T1 TRANSCEIVER WITH CLOCK RECOVERY UNIT
XRT81L17
PRELIMINARY
REV. P1.0.0
REVISIONS
NOTICE
EXAR Corporation reserves the right to make changes to the products contained in this publication in order
to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of
any circuits described herein, conveys no license under any patent or other right, and makes no
representation that the circuits are free of patent infringement. Charts and schedules contained here in are
only for illustration purposes and may vary depending upon a user’s specific application. 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; (b) the user assumes all such risks; (c) potential liability of EXAR
Corporation is adequately protected under the circumstances.
Copyright 2002 EXAR Corporation
Datasheet October 2002.
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
4
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