DS26518GN+ Maxim Integrated Products, DS26518GN+ Datasheet - Page 236

• Manufacturer Part Number: DS26518GN+
• Description: IC TXRX T1/E1/J1 8PORT 256-CSBGA
• Manufacturer: Maxim Integrated Products
• Type: Transceiverr

Specifications of DS26518GN+

• Number Of Drivers/receivers: 8/8
• Protocol: T1/E1/J1
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 256-CSBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 1 and 0: Receiver Sensitivity/Monitor Gain Select (RSMS[1:0]). These bits are used to select the receiver
sensitivity level and additional gain in monitoring applications. The monitor mode (RMONEN) adds resistive gain to
compensate for the signal loss caused by the isolation resistors. See
Table 10-20. Receiver Sensitivity Selection with Monitor Mode Disabled
Table 10-21. Receiver Sensitivity Selection with Monitor Mode Enabled
Bit 7: Receive G.703 Clock (RG703). If this bit is set, the receiver expects a 2.048MHz or 1.544MHz clock from
the RTIPn/RRINGn, based on the selection of T1 (1.544) or E1 (2.048) mode in the
Bit 3: Receiver Turns Ratio (RTR)
Bit 2: Receiver Monitor Mode Enable (RMONEN)
RMONEN
RMONEN
0
0
0
0
1
1
1
1
0 = Receive transformer turns ratio is 1:1.
1 = Receive transformer turns ratio is 2:1. This option should only be used in short-haul applications.
Note: Internal impedance match is not available for this mode.
0 = Disable receive monitor mode.
1 = Enable receive monitor mode. Resistive gain is added with the maximum sensitivity. The receiver
sensitivity is determined by RSMS1 and RSMS0.
RG703
7
0
RSMS[1:0]
RSMS[1:0]
00
01
10
11
00
01
10
11
LRCR
LIU Receive Control Register
1008h + (20h x (n - 1)) : where n = 1 to 8
—
6
0
MONITOR MODE
MONITOR MODE
—
RECEIVER
RECEIVER
5
0
GAIN (dB)
GAIN (dB)
14
20
26
32
0
0
0
0
236 of 286
—
0
4
RECEIVER SENSITIVITY
RECEIVER SENSITIVITY
(MAX CABLE LOSS
(MAX CABLE LOSS
36 for T1; 43 for E1
RTR
ALLOWED) (dB)
ALLOWED) (dB)
3
0
Table 10-20
22.5
17.5
12
20
30
30
12
DS26518 8-Port T1/E1/J1 Transceiver
RMONEN
2
0
and
LTRCR
Table 10-21.
RSMS1
register.
1
0
RSMS0
0
0