DS21554LB+ Maxim Integrated Products, DS21554LB+ Datasheet - Page 89
DS21554LB+
Manufacturer Part Number
DS21554LB+
Description
IC TXRX E1 5V 100-LQFP
Manufacturer
Maxim Integrated Products
Datasheet
1.DS2154LNA2.pdf
(124 pages)
Specifications of DS21554LB+
Function
Single-Chip Transceiver
Interface
E1, HDLC, J1, T1
Number Of Circuits
1
Voltage - Supply
4.75 V ~ 5.25 V
Current - Supply
75mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
100-LQFP
Includes
Remote and AIS Alarm Detector / Generator
Product
Framer
Number Of Transceivers
1
Data Rate
1.544 Mbps
Supply Voltage (max)
5.25 V
Supply Voltage (min)
4.75 V
Supply Current (max)
75 mA (Typ)
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Ic Interface Type
Parallel, Serial
Supply Voltage Range
4.75V To 5.25V
Operating Temperature Range
0°C To +70°C
Digital Ic Case Style
LQFP
No. Of Pins
100
Filter Terminals
SMD
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power (watts)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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15.5.
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
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
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)
15-8. The receiver of the DS21354/DS21554 can provide gain to overcome the resistive loss of a
Receive Monitor Mode
REGISTER VALUE
72 hex
70 hex
E1 LINE
Rm
MONITOR
PORT JACK
Rm
PRIMARY
E1 TERMINATING
DEVICE
89 of 124
GAIN (dB)
12
30
X
F
M
R
SECONDARY E1
TERMINATING
DEVICE
Rt
DS21X54
Table
15-4, the
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