DS3251+ Maxim Integrated Products, DS3251+ Datasheet - Page 29

• Manufacturer Part Number: DS3251+
• Description: IC LIU DS3/E3/STS-1 144-CSBGA
• Manufacturer: Maxim Integrated Products
• Type: Line Interface Units (LIUs)r

Specifications of DS3251+

• Number Of Drivers/receivers: 1/1
• Protocol: DS3
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 144-CSBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 9-A. DS3 Waveform Template
Governing Specifications: ANSI T1.102 and Bellcore GR-499.
Table 9-B. DS3 Waveform Test Parameters and Limits
Table 9-C. STS-1 Waveform Template
Governing Specifications: Bellcore GR-253 and Bellcore GR-499 and ANSI T1.102.
Table 9-D. STS-1 Waveform Test Parameters and Limits
Rate
Line Code
Transmission Medium
Test Measurement Point
Test Termination
Pulse Amplitude
Pulse Shape
Unframed All-Ones Power Level at 22.368MHz
Unframed All-Ones Power Level at 44.736MHz
Pulse Imbalance of Isolated Pulses
Rate
Line Code
Transmission Medium
Test Measurement Point
Test Termination
Pulse Amplitude
Pulse Shape
Unframed All-Ones Power Level at 25.92MHz
Unframed All-Ones Power Level at 51.84MHz
TIME (IN UNIT INTERVALS)
TIME (IN UNIT INTERVALS)
-0.68 ≤ T ≤ +0.36
-0.36 ≤ T ≤ +0.36
-0.68 ≤ T ≤ +0.26
-0.36 ≤ T ≤ +0.36
-0.85 ≤ T ≤ -0.68
-0.85 ≤ T ≤ -0.36
-0.85 ≤ T ≤ -0.68
-0.85 ≤ T ≤ -0.36
PARAMETER
PARAMETER
0.36 ≤ T ≤ 1.4
0.36 ≤ T ≤ 1.4
0.26 ≤ T ≤ 1.4
0.36 ≤ T ≤ 1.4
LOWER CURVE
LOWER CURVE
UPPER CURVE
UPPER CURVE
44.736Mbps (±20ppm)
B3ZS
Coaxial cable (AT&T 734A or equivalent)
At the end of 0 to 450ft of coaxial cable
75Ω (±1%) resistive
Between 0.36V and 0.85V
An isolated pulse (preceded by two zeros and
followed by one or more zeros) falls within the
curves listed in
Between -1.8dBm and +5.7dBm
At least 20dB less than the power measured at
22.368MHz
Ratio of positive and negative pulses must be
between 0.90 and 1.10.
51.840Mbps (±20ppm)
B3ZS
Coaxial cable (AT&T 734A or equivalent)
At the end of 0 to 450ft of coaxial cable
75Ω (±1%) resistive
0.800V nominal (not covered in specs)
An isolated pulse (preceded by two zeros and
followed by one or more zeros) falls within the
curved listed in
Between -1.8dBm and +5.7dBm
At least 20dB less than the power measured at
25.92MHz.
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NORMALIZED AMPLITUDE EQUATIONS
NORMALIZED AMPLITUDE EQUATION
0.5 {1 + sin[(π / 2)(1 + T / 0.34)]} + 0.03
0.5 {1 + sin[(π / 2)(1 + T / 0.34)]} + 0.03
0.5 {1 + sin[(π / 2)(1 + T / 0.18)]} - 0.03
0.5 {1 + sin[(π / 2)(1 + T / 0.18)]} - 0.03
0.08 + 0.407e
Table
Table
0.1 + 0.61e
SPECIFICATION
SPECIFICATION
9-A.
9-C.
-0.03
-0.03
-0.03
-0.03
0.03
0.03
-2.4(T - 0.26)
-1.84(T - 0.36)