MIC2550_11 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – Universal Serial Bus Transceiver

MIC2550
Micrel, Inc.
MIC2550
Universal Serial Bus Transceiver
General Description
The MIC2550 is a single-chip transceiver that complies with
the physical layer specifications for Universal Serial Bus
(USB).
The MIC2550 supports full-speed (12Mbps) dual supply
voltage operation (patent pending) and low-speed (1.5Mbps)
operation.
A unique dual supply voltage operation allows the MIC2550
to reference the system I/F I/O signals to a supply voltage
down to 2.5V while independently powered by the USB V_BUS.
This allows the system interface to operate at its core voltage
without addition of buffering logic and also reduce system
operating current.
Features
• Compliant to USB Specification Revision 2.0 for
low-speed (1.5Mbps) and full-speed (12Mbps) operation
• Compliant to IEC-61000-4.2 (Level 2)
• Operation down to 2.5V
• Dual supply voltage operation
• Integrated speed-select termination supply
• Very low power consumption meets USB suspend-
current requirements
• Small 14-pin TSSOP and 16-pin MLF™ packages
Applications
• Personal digital assistants (PDA)
• Palmtop computers
• Cellular telephones
Ordering Information
Part Number
Standard
Pb-Free
MIC2550BTS MIC2550YTS
MIC2550BML MIC2550YML
Package
14-Pin TSSOP
16-Pin MLF™
System Diagram
System
Supply Voltage
0.47µF
System
Interface
GND
MIC2550
VIF VTRM
SPD VBUS
OE# D+
RCV D–
VP
D–
VM
SUS
GND
1.5k
1µF
LOW
SPEED
R_S
24Ω
R_S
24Ω
1µF min
10µF max
HIGH
SPEED
V_BUS
D+
D–
GND
USB
Interface
Connector
41206ESDA SurgX^
(See “Applications Information”
for additional suppliers.)
MicroLeadFrame and MLF are trademarks of Amkor Technology.
SurgX is a registered trademark of Cooper Electronics Technologies.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
March 2005
1
M9999-031805