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參數(shù)資料
| 型號： | T7288 |
| 廠商： | Lineage Power |
| 英文描述： | CEPT/E1 Line Interface(CEPT/E1 線接口) |
| 中文描述： | CEPT/E1線路接口（CEPT/E1線接口） |
| 文件頁數(shù)： | 9/22頁 |
| 文件大?。?/td> | 432K |
| 代理商： | T7288 |
Data Sheet
January 1998
T7288 CEPT/E1 Line Interface
9
Lucent Technologies Inc.
Overview
(continued)
Receive Converter
(continued)
Table 3. Shutdown,
LOS
, and
LOC
Truth Table
x = don't care.
* These values apply for single-rail or dual-rail/logic mode 1. For dual-rail/logic mode 2, all logic-level outputs except for looped-back data are
the inverse of that shown above.
Activated by analog loss-of-signal detection.
Digital LOS detection forces receive data low. Analog LOS detection merely forces receive data to stop transitions; receive data will be forced
either high or low with analog LOS detection.
§ All-0s looped-back data, no HDB3 operation. Sufficiently sparse looped-back data (not HDB3 encoded) also causes the receive ICO to free-
run; therefore, properly timed loopback data is not guaranteed.
Note: Measurement conditions—random data, T
A
= 25
°
C, V
DD
= 5 V, 6 dB cable loss, BCLK clock present.
Figure 7. Random Input Data Jitter Tolerance (HDB3 Encoded)
Inputs
Outputs
LP1
SD
ALMT
Input Signal
at T1, R1
Active
No signal
Active
No signal
x
x
x
x
x
Loopback 1
Signal
x
x
x
x
Active
No signal
Active
No signal
x
LOS LOC
Receive
Data
*
Normal
Low
Normal
Low
Normal loopback
Low
§
Normal loopback
Low
Unaffected
RCLK
*
Active LOS
Detectors
Analog & digital
1
1
1
1
0
0
0
0
x
0
0
1
1
0
0
1
1
x
1
1
1
1
1
1
1
1
0
1
0
1
0
1
0
1
0
0
1
1
1
0
1
1
1
0
0
Normal
Free-running ICO
Analog & digital
Normal
High
Normal loopback
Free-running ICO
§
Normal loopback
High
Unaffected
Analog & digital
Analog & digital
Digital only
Digital only
Digital only
Digital only
x
G.823
SPECIFICATION
10.0
1.0
0.1
0.01
0.1
1.0
10
100
I
(
JITTER FREQUENCY (kHz)
MEASURED T7288
PERFORMANCE
BER = 10
–6
(20, 1.5)
(1, 2.9)
(2.4k, 1.5)
(18k, 0.2)
(100k, 0.2)
JITTER
FREQUENCY
(kHz)
4.0
8.0
10
15
20
30
MEASURED DATA POINTS
JITTER
AMPLITUDE
(U.I.pp)
1.9
1.1
0.9
0.67
0.52
0.46
JITTER
FREQUENCY
(kHz)
40
50
60
70
100
JITTER
AMPLITUDE
(U.I.pp)
0.45
0.44
0.43
0.43
0.43
5-4354(C)
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