DS3251+ Maxim Integrated Products, DS3251+ Datasheet - Page 73

• 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

Bits 5, 4: Transmit Waveshaping Control (TWSC[5:4]). In DS3 and STS-1 modes, this field adjusts the
amplitude of the second of two rising-edge segments. In E3 mode this field has no effect, except for the 11 value,
which is a special case in which the entire pulse is made wider.
Bits 3, 2: Transmit Waveshaping Control (TWSC[3:2]). In DS3 and STS-1 modes, this field adjusts the
amplitude of the first of two falling-edge segments. In E3 mode this field adjusts the amplitude of the trailing edge
overshoot. The 11 value is a special case in which the entire pulse is made wider.
Bits 1, 0: Transmit Waveshaping Control (TWSC[1:0]). In DS3 and STS-1 modes, this field adjusts the fall time
of the second of two falling-edge segments. In E3 mode this field has no effect, except for the 11 value, which is a
special case in which the entire pulse is made narrower.
00 - normal rise amplitude
01 - decrease second rise amplitude 15%
10 - increase second rise amplitude 15%
11 - increase pulse width by 0.15ns
00 - normal first fall time
01 - decrease first fall time amplitude 15%
10 - increase first fall time amplitude 15%
11 - increase pulse width by 0.15ns
00 - normal second fall time
01 - decrease second fall time amplitude 15%
10 - increase second fall time amplitude 15%
11 - decrease pulse width by 0.15ns
DS3/STS-1 Behavior
DS3/STS-1 Behavior
DS3/STS-1 Behavior
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E3 Behavior
normal pulse
normal pulse
normal pulse
increase pulse width by 0.15ns
E3 Behavior
normal undershoot
decrease undershoot 2%
increase undershoot 2%
increase pulse width by 0.15ns
E3 Behavior
normal pulse
normal pulse
normal pulse
decrease pulse width by 0.15ns
DS32506/DS32508/DS32512