MIC2550BTS Micrel Inc, MIC2550BTS Datasheet - Page 9

• Manufacturer Part Number: MIC2550BTS
• Description: Transceiver IC
• Manufacturer: Micrel Inc

Specifications of MIC2550BTS

• Logic Case Style: TSSOP
• No. Of Pins: 14
• Peak Reflow Compatible (260 C): No
• No. Of Receivers: 1
• Supply Voltage Max: 5.25V
• Transceiver Type: USB
• Driver Case Style: TSSOP
• Leaded Process Compatible: No
• Number Of Transceivers: 1
• Esd Protection: YeskV
• Operating Supply Voltage (typ): Not RequiredV
• Package Type: TSSOP
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (max): Not RequiredV
• Operating Supply Voltage (min): Not RequiredV
• Pin Count: 14
• Mounting: Surface Mount
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PCB Layout Recommendations
Although the USB standard and applications are not based in
an impedance controlled environment, a properly designed
PCB layout is recommended for optimal transceiver perfor-
mance. The suggested PCB layout hints are as follows:
March 2005
MIC2550
• Match signal line traces (VP/VM, D+, D–) to
• For every signal line trace width (w), separate
• Maintain the same number of vias on each
• Control signal line impedances to ±10%.
• Keep R
40ps, approximately
PCB material propagation is about 150ps/inch,
so to minimize skew try to keep VP/VM, D+/D–
traces as short as possible.
the signal lines by 1.5–2 widths. Place all other
traces at >2 widths from all signal line traces.
differential trace, keeping traces approximately
at same separation distance along the line.
equal distance between R
D+ and D–.
S
as close to the IC as possible, with
1
/
3
inch if possible. FR-4
S
and the IC for both
9
M9999-031805
Micrel, Inc.