DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 153

• Manufacturer Part Number: DS21Q55
• Description: IC TXRX QUAD T1/E1/J1 SCT 256BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55

• Function: Transceiver
• Interface: E1, J1, T1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Includes: BERT Generator and Detector, Dual HDLC Controllers
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power (watts): -

Register Name:
Register Description: Transmit Line Build-Out Control
Register Address:
Bit #
Name
Default
Bit 0–5 Gain Control Bits 0–5 (GC0–GC5). The GC0 through GC5 bits control the gain setting for the
nonautomatic gain mode. Use the tables below for setting the recommended values. The LB (line build-
out) column refers to the value in the L0–L2 bits in LIC1 (Line Interface Control 1) register.
T1, Impedance Match On
E1, Impedance Match On
Bit 6/Automatic Gain Control Enable (AGCE).
Bit 7/Unused, must be set to zero for proper operation.
T1, Impedance Match
E1, Impedance Match
NETWORK MODE
0 = use Transmit AGC, TLBC bits 0–5 are “don’t care”
1 = do not use Transmit AGC, TLBC bits 0–5 set nominal level
Off
Off
7
0
-
AGCE
TLBC
7Dh
6
0
LB
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
4
5
0
1
GC5
5
0
GC5 GC4 GC3 GC2 GC1 GC0
1
0
0
1
1
1
0
1
0
0
0
0
1
1
0
1
1
1
1
1
0
0
GC4
4
0
0
1
1
0
0
0
1
1
1
1
1
1
0
0
0
1
0
0
0
0
1
1
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GC3
0
1
1
0
0
0
0
1
1
0
0
1
0
0
1
1
0
0
1
1
1
1
3
0
1
0
0
0
1
1
0
1
1
1
1
0
0
0
1
1
0
0
0
0
0
0
GC2
2
0
1
1
1
0
1
1
1
1
1
0
0
1
1
0
0
1
0
0
1
0
1
1
GC1
1
0
0
1
0
0
1
1
1
1
0
1
1
0
0
0
0
1
1
1
0
0
0
0
GC0
0
0