MIC2551A-2.5_10 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – USB Transceiver

MIC2551A-2.5
MIC2551A-2.5
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. This in turn, eases
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 reduces system operating current
and allows the system to operate at its core voltage without
additional buffering logic.
MIC2551A-2.5 is differentiated from MIC2551A by a smaller
space saving MLF^® package (2.5mm × 2.5mm) and ±15kV
ESD protection which eliminates the need for separate ESD
protection devices on the D+, D- data lines.
Data sheets and support documentation can be found on
Micrel's web site at www.micrel.com.
Features
• ±15kV ESD protection on V_BUS, D+ and D-
• Smaller 2.5mm × 2.5mm MLF^® package
• USB 1.1 and 2.0 compliant transceiver (full speed -
12Mbs and low speed - 1.5Mbps) operation
• 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
• No power supply sequencing requirements
• Software controlled enumeration
Applications
• PDAs
• Palmtops
• Cell phones
• PC peripherals
Ordering Information
Part Number
Junction Temp. Range Package - Pb Free
MIC2551AYML25
-40°C to +85°C
2.5mm×2.5mm MLF^®
Typical Application
V I/O
USB
Controller
GND
MIC2551A
Transceiver
VIF VTRM
CON ^VPU
OE#
RCV ^VBUS
VP
D+
VM
D–
SPD
SUS
GND
1.5 k
20Ω 1%
20Ω 1%
1.0µF
10µF
V_BUS
D+
D–
GND
USB
Port
Typical Application Circuit
MicroLeadFrame and MLF are registered trademarks of Amkor Technology.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
March 2010
1
M9999-030810