MIC2551A-2.5_10 MICREL [Micrel Semiconductor], MIC2551A-2.5_10 Datasheet

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MIC2551A-2.5_10

Manufacturer Part Number
MIC2551A-2.5_10
Description
USB Transceiver
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet
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
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
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.
Typical Application
MicroLeadFrame and MLF are registered trademarks of Amkor Technology.
March 2010
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
BUS
. This reduces system operating current
®
package (2.5mm × 2.5mm) and ±15kV
V I/O
Controller
GND
USB
Typical Application Circuit
VIF
CON
OE#
RCV
VP
VM
SPD
SUS
Transceiver
MIC2551A
Ordering Information
Part Number
MIC2551AYML25
GND
VTRM
VBUS
VPU
D+
D–
1
Features
• ±15kV ESD protection on V
• Smaller 2.5mm × 2.5mm MLF
• USB 1.1 and 2.0 compliant transceiver (full speed -
• Separate I/O supply with operation down to 1.6V
• Integrated speed select termination supply
• Very-low power consumption to meet USB suspend
• No power supply sequencing requirements
• Software controlled enumeration
Applications
• PDAs
• Palmtops
• Cell phones
• PC peripherals
12Mbs and low speed - 1.5Mbps) operation
current requirements
20Ω 1%
20Ω 1%
Junction Temp. Range
1.5 k
-40°C to +85°C
MIC2551A-2.5
USB Transceiver
10µF
1.0µF
GND
V
BUS
D+
D–
BUS
®
, D+ and D-
package
2.5mm×2.5mm MLF
Package - Pb Free
USB
Port
M9999-030810
®

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MIC2551A-2.5_10 Summary of contents

Page 1

... 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 . This reduces system operating current ...

Page 2

Pin Configuration Pin Description Pin Number Pin Name 1 RCV CON 5 GND 6 SUS 7 OE VTRM 11 VPU 12 VBUS 13 VIF 14 SPD M9999-030810 ...

Page 3

SUS OE# D+, D– Driving 0 1 Receiving Hi-Z Note 1. During suspend, VP and VM are active in order to detect out-of-band signaling conditions. OE Input ...

Page 4

Absolute Maximum Ratings Supply Voltage (V ) .................................................. 6.5V BUS All Other Inputs ...............................................–0.5V to 5.5V Ambient Storage Temperature .................. –65°C to +150°C Output Current (D+, D–) .......................................... ± 50mA Output Current (all others) ........................................ ±15mA Input Current............................................................. ±50mA ESD, ...

Page 5

Symbol Parameter ESD Protection IEC-1000-4-2 Air Discharge (D+, D-, V BUS Contact Discharge only) DC Electrical Characteristics (Transceiver) Leakage Current I Hi-Z State Data Line Leakage LO (Suspend Mode) Input Levels V Differential Input Sensitivity DI V Differential Common Mode ...

Page 6

Timing Diagrams OE D+/D– Differential Data Lines D+ D– D– Test Circuits M9999-030810 TRANSMIT t PVZ t t PZD PDZ Figure 1. Enable and Disable ...

Page 7

... USB requirements. The MIC2551A can operate interface supply voltages as low as 1.6V and still meet the USB physical layer specifications. As shown in the circuit above, the MIC2551A takes advantage of the USB supply voltage operate the transceiver. The system BUS ...

Page 8

... Power Supply Configuration The MIC2551A can be set up for different power supply configurations which modify the behavior of the device. Both V and V have special thresholds that detect when they BUS IF are either removed or grounded. Table 1 depicts the behavior under the different power supply configuration scenarios that are explained below ...

Page 9

Configuration Mode VBUS/VTRM Normal Connected Disconnect (D+/D- Open sharing) Disconnect Ground Connected Disable Mode Unpowered Connected 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 ...

Page 10

Package Information MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 tel This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel ...

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