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參數資料
| 型號： | DS2291/87-22291-000 |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 1/9頁 |
| 文件大小： | 0K |
| 描述： | IC STIK T1 LONG LOOP 5V 30-SIP |
| 標準包裝： | 1 |
| 應用： | 數據傳輸 |
| 電源電壓： | 5V |
| 封裝/外殼： | 30-Stik 模塊 |
| 包裝： | 散裝 |
| 安裝類型： | 表面貼裝 |
| 其它名稱： | DS2291/8722291000 |
DS2291
T1 Long Loop Stik
DS2291
* Service mark of AT&T Communications
022798 1/10
FEATURES
Recovers clock and data off of T1 lines from 0 to 6,000
feet in length
+0 to -30dBSX receiver sensitivity
Built-in Automatic Line Build Out (ALBO) circuitry; no
tuning or external components required
Dejitters the recovered clock and data
Meets TR 62411 (Dec. 1990) for jitter tolerance and
attenuation
Companion to the DS2290 T1 Isolation Stik
Connects to a standard 30-pin single in-line
connector
Single +5V supply
Compatiblewith the DS2180A or DS2141A T1 Trans-
ceivers
DESCRIPTION
The DS2291 T1 Long Loop Stik contains all the circuitry
necessary to recover clock and data from a T1 line. The
DS2291 contains an Automatic Line Build Out (ALBO)
circuit that allows it to adapt to T1 lines varying in length
from 0 to 6,000 feet. It also will dejitter the recovered
clock and data according to the jitter attenuation curves
outlined in AT&T Communications Document TR 62411
(Accunet* T1.5 Service Description and Interface speci-
fication - December 1990). Applications area include
Channel Service Units (CSU), T1 monitoring equip-
ment, and T1 test equipment.
PIN ASSIGNMENT
VDD 1
B8ZS 20
GND 23
VDD 2
LB 9
NC 10
GND 22
RCLK 3
RPOS 4
RNEG 5
LPOS 7
LNEG 8
NC 11
RCL 14
NC 13
BPV 15
RX– 30
RX+ 29
NC 28
NC 27
NC 26
NC 25
DJA 19
NC 18
LOCK 16
NC 12
LCLK 6
BL 17
NC 24
DEJITTER
CIRCUITR
Y
ALBO
&
CLOCK
RECOVER
Y
CIRCUITR
Y
(ACTUAL SIZE)
RST 21
OVERVIEW
The DS2291 contains onboard ALBO circuitry that al-
lows it to recover clock and data from T1 lines up to
6,000 feet in length. (See Figure 1.) Unlike alternative
methods of clock and data recovery from T1 lines, the
DS2291 does not require any tuning, nor does it need
any additional external circuitry. The state of the LOCK
pin indicates whether the DS2291 has been able to
phase and frequency lock to the incoming T1 signal. If
the LOCK pin is high, the DS2291 is properly locked
onto the incoming signal. The DS2291 meets the latest
T1 specification for jitter tolerance. The jitter tolerance
curve in Figure 2 is applicable over the full dynamic in-
put range of the DS2291.
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