MIC2550A

Manufacturer Part NumberMIC2550A
DescriptionUniversal Serial Bus Transceiver
ManufacturerMicrel Semiconductor
MIC2550A datasheet
 


1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
Page 1/11

Download datasheet (160Kb)Embed
Next
MIC2550A
General Description
The MIC2550A is a single-chip transceiver that complies with
the physical layer specifications for Universal Serial Bus
(USB).
The MIC2550A supports full-speed (12Mbps) and low-speed
(1.5Mbps) operation and introduces superior edge rate con-
trol to produce crisper eye diagrams. As a result, the task of
passing USB compliance testing is made easier.
www.DataSheet4U.com
A unique, patented, dual supply voltage operation allows the
MIC2550A to reference the system I/F I/O signals to a supply
voltage down to 2.5V while independently powered by the
USB V
. This allows the system interface to operate at its
BUS
core voltage without addition of buffering logic and also
reduce system operating current.
System Diagram
System
Supply Voltage
0.47µF
System
Interface
GND
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 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
March 2005
Universal Serial Bus Transceiver
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
MIC2550ABTS
MIC2550ABML
1.5k
MIC2550A
VIF
VTRM
LOW
SPEED
SPD
VBUS
R
S
OE#
D+
24Ω
RCV
D–
R
S
VP
D–
24Ω
VM
1µF
SUS
GND
1µF min
10µF max
1
Micrel, Inc.
MIC2550A
Pb-Free
Package
MIC2550AYTS
14-Pin TSSOP
MIC2550AYML
16-Pin MLF™
HIGH
SPEED
V
BUS
D+
USB
D–
Interface
Connector
GND
Cooper Electronics Technologies
41206ESDA SurgX
(See “Applications Information”
for additional suppliers.)
M9999-031805

MIC2550A Summary of contents

  • Page 1

    ... As a result, the task of passing USB compliance testing is made easier. www.DataSheet4U.com A unique, patented, dual supply voltage operation allows the MIC2550A to reference the system I/F I/O signals to a supply voltage down to 2.5V while independently powered by the USB V . This allows the system interface to operate at its ...

  • Page 2

    ... D– 9 OE# 8 SUS Pin Number Pin Function MIC2550ABML 15 System Interface Supply Voltage (Input): Determines logic voltage levels for system interface signaling to logic controller. 1 Speed (Input): Edge rate control. Logic high selects full-speed edge rates. Logic low selects low-speed edge rates. 2 Receive Data (Output): System interface receive data interface to logic controller ...

  • Page 3

    ... MIC2550A Absolute Maximum Ratings Supply Voltage (V ) ................................................... +6.5V IF Input Voltage (V ) ........................ –0.5V(min)/5.5V(max) BUS Output Current ( ........................................... ±50mA D+ D– Output Current (all others) ....................................... ±15mA Input Current ............................................................ ±50mA Storage Temperature (T ) ......................... –65° to +150°C S ESD, Note D+, D– ......................................................... ±10kV BUS All other pins ........................................................... ±2kV ...

  • Page 4

    ... MIC2550A Symbol Parameter Transceiver DC Characteristics I Hi-Z State Data Line Leakage LO V Differential Input Sensitivity DI V Differential Common-Mode Range CM V Single-Ended Receiver Threshold SE Receiver Hysteresis, Note 6 V Static Output Low, Note Static Output High, Note Output Signal Crossover Voltage CRS Note 6 ...

  • Page 5

    ... MIC2550A Timing Diagrams www.DataSheet4U.com Differential Differential Differential March 2005 PVZ PZD D– V D– Figure 1. Enable and Disable Times V D+ 90% Data 10% Lines V D– Figure 2. Rise and Fall Times V D+ Data ...

  • Page 6

    ... MIC2550A www.DataSheet4U.com Note undefined. Test Circuits M9999-031805 : ) – Table 1. Truth Table ...

  • Page 7

    ... MIC2550A Block Diagram www.DataSheet4U.com March 2005 SYSTEM I/F USB VOLTAGE DOMAIN VOLTAGE DOMAIN Regulator VIF TO INTERNAL CIRCUITS SPD OE# RCV VP VM SUS GND 7 Micrel, Inc. VBUS VTRM D– D+ M9999-031805 ...

  • Page 8

    ... Switching SP0503BAHT IF BUS Non-multiplexed Bus To save pin count for the USB logic controller interface, the MIC2550A was designed with V pins. To interface the MIC2550A with a non-multiplexed data bus, resistors can be used for low cost isolation as shown in TRM Figure 11. MIC2550 VBUS VBUS / VTRM ...

  • Page 9

    ... MIC2550A 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: • Match signal line traces (VP/VM, D+, D–) to ...

  • Page 10

    ... MIC2550A Package Information www.DataSheet4U.com 3.00BSC 2.75BSC 0.50 DIA 2.75BSC 3 4 TOP VIEW 0.5BSC M9999-031805 4.50 (0.177) 6.4 BSC (0.252) 4.30 (0.169) 0.30 (0.012) 0.19 (0.007) 5.10 (0.200) 4.90 (0.193) 1.10 MAX (0.043) 0.65 BSC (0.026) 8° 0.15 (0.006) 0° 0.05 (0.002) 14-Pin TSSOP (TS) +0.15 0.85 –0.65 +0.04 0.01 –0.01 +0.15 0.65 –0.65 0.42 0.20 REF. 3.00BSC 12° max ...

  • Page 11

    ... MIC2550A www.DataSheet4U.com MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...