参数资料
型号: LXT386LE
英文描述: PCM TRANSCEIVER|QUAD|CEPT PCM-30/E-1|CMOS|QFP|100PIN|PLASTIC
中文描述: 的PCM收发器|四|优税PCM-30/E-1 |的CMOS | QFP封装| 100引脚|塑料
文件页数: 29/80页
文件大小: 1112K
代理商: LXT386LE
Octal T1/E1/J1 Transceiver
LXT384
Datasheet
29
Figure 6. External Transmit/Receive Line Circuitry
Component
75
Coax
120
Twisted Pair
100
Twisted Pair
TVCC = 5V
100
Twisted Pair
TVCC = 3.3V
R
T
11
± 1%
9.31
± 1%
11
± 1%
15.0
± 1%
9.1
± 1%
12.4
± 1%
0
R
R
12.4
± 1%
D1 - D4
International Rectifier.............11DQ04 or 10BQ060
Motorola.......................................MBR0540T1
TVS1
SGS-Thomson..............SMLVT 3V3 3.3V Transient Voltage Suppressor (TVCC=3.3V)
Semtech.......................SMCJ5.0AC 5.0V Transient Voltage Suppressor (TVCC=5.0V)
0.1
μ
F
TVCC
TTIP
TRING
T
T
RTIP
RRING
R
R
R
R
0.22
μ
F
1:2
68
μ
F
1
1
Common decoupling capacitor for all TVCC and TGND pins.
TVCC
D1
D2
TVCC
D3
D4
1k
1k
Rx LINE
VCC
GND
LXT384
(ONE CHANNEL)
0.1
μ
F
3.3V
3
Refer to Transformer Specifications Table for transformer specifications.
TVCC
TVS1
2
Typical value. Adjust for actual board parasitics to obtain optimum return loss.
4
DC blocking capacitor needed when pulse shaping is disabled. See pin
description for TCLK7, pin 2 of QFP package in Table 1.
R
T
R
T
1:2
560pF
2
Tx LINE
3
4
0.47
μ
F
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