參數(shù)資料
型號(hào): DS2154LNA2+
廠商: Maxim Integrated Products
文件頁數(shù): 113/124頁
文件大?。?/td> 0K
描述: IC TXRX E1 5V 100-LQFP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 90
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 1/1
規(guī)程: E1
電源電壓: 4.75 V ~ 5.25 V
安裝類型: 表面貼裝
封裝/外殼: 100-LQFP
供應(yīng)商設(shè)備封裝: 100-LQFP(14x14)
包裝: 托盤
DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
89 of 124
15.5.
Receive Monitor Mode
When connecting to a monitor port, a large resistive loss is incurred due to the voltage divider between
the E1 line termination resistors (Rt) and the monitor port isolation resistors (Rm), as shown in
Figure 15-8. The receiver of the DS21354/DS21554 can provide gain to overcome the resistive loss of a
monitor connection. This is typically a purely resistive loss/gain and should not be confused with the
cable loss characteristics of an E1 transmission line. Via the TEST3 register as shown in Table 15-4, the
receiver can be programmed to provide both 12dB and 30dB of gain.
Figure 15-8. Typical Monitor Port Application
Table 15-4. Receive Monitor Mode Gain
TEST3 (Address = AC hex)
REGISTER VALUE
GAIN (dB)
72 hex
12
70 hex
30
PRIMARY
E1TERMINATING
DEVICE
MONITOR
PORTJACK
E1LINE
X
F
M
R
DS21X54
Rt
Rm
SECONDARYE1
TERMINATING
DEVICE
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