MIC2551A_11 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – USB Transceiver

MIC2551A
MIC2551A
USB Transceiver
Micrel, Inc.
General Description
The MIC2551A is a single chip transceiver that complies with
the physical layer specifications of the Universal Serial Bus
(USB) 2.0. It supports both full speed (12Mbps) and low
speed (1.5Mbps) operation and introduces superior edge
rate control, producing crisper eye diagrams, which ease the
task of passing USB compliance testing.
A unique, patented, dual supply voltage operation allows the
MIC2551A to reference the system I/F I/O signals to a supply
voltage down to 1.6V 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 full
speed (12Mbs) and low speed (1.5Mbps) operation
• Compliant to IEC-61000-4.2 (Level 3)
• Separate I/O supply with operation down to 1.6V
• Integrated speed select termination supply
• Very-low power consumption to meet USB suspend-
current requirements
• Small TSSOP and MLF^® packages
• No power supply sequencing requirements
• Software controlled re-enumeration
Applications
• PDAs
• Palmtops
• Cell phones
Ordering Information
Part Number
Standard
Pb-Free
MIC2551ABTS MIC2551AYTS
MIC2551ABML MIC2551AYML
Package
14-Pin TSSOP
16-Pin MLF^®
Typical Application
System
Supply Voltage
VCC GPIO
USB SIE
Controller
MIC2551A
VIF VTRM
CON VBUS
OE# VPU
RCV
R_S
20Ω/±1%
1.5k
VP
D+
VM
SPD
D–
R_S
20Ω/±1%
SUS
GND
1.0µF (min) 1µF
10µF (max)
Typical Application Circuit
V_BUS
D+
D–
GND
USB
Port
41206ESDA SurgX^
(See “Applications Information”
for additional suppliers.)
MicroLeadFrame and MLF are registered 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
November 2008
1
M9999-112008