MIC2550AYML25 TR Micrel Inc, MIC2550AYML25 TR Datasheet - Page 9

• Manufacturer Part Number: MIC2550AYML25 TR
• Description: USB Transceiver -
• Manufacturer: Micrel Inc
• Type: USB Transceiverr

Specifications of MIC2550AYML25 TR

• Number Of Drivers/receivers: 1/1
• Protocol: USB 2.0
• Voltage - Supply: 4 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 14-MLF®, QFN
• Number Of Transceivers: 1
• Esd Protection: YeskV
• Operating Supply Voltage (typ): Not RequiredV
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (max): Not RequiredV
• Operating Supply Voltage (min): Not RequiredV
• Pin Count: 16
• Mounting: Surface Mount
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MIC2550AYML25TR; MIC2550AYML25TR

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
MIC2550A
• 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 >2w 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.