MIC2550

Manufacturer Part NumberMIC2550
DescriptionUniversal Serial Bus Transceiver Advance Information
ManufacturerMicrel Semiconductor
MIC2550 datasheet
 


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MIC2550
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 (12Mb/s) dual supply volt-
age operation (patent pending) and low-speed (1.5Mb/s)
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
This allows the system interface to operate at its core voltage
without addition of buffering logic and also reduce system
operating current.
System Diagram
System
Supply
Voltage
0.47µF
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
October 4, 1999
Features
• Compliant to USB Specification Revision 1.1
• Operation down to 2.5V
• Dual supply voltage operation
• Supports full-speed (12Mb/s) and
low-speed (1.5Mb/s) operation
• Speed-select termination supply
• Very low power consumption meets
USB suspend-current requirements
• Small 14-pin TSSOP
.
BUS
Applications
• Personal digital assistants (PDA)
• Palmtop computers
• Cellular telephones
Ordering Information
Part Number
MIC2550BTS
MIC2550
VIF
VTRM
SPD
VBUS
OE#
D+
System
Interface
RCV
D–
VP
VM
SUS
GND
GND
1
MIC2550
Universal Serial Bus Transceiver
Advance Information
Junction Temp. Range
–40 C to +85 C
14-Pin TSSOP
1.5k
HIGH
SPEED
LOW
V
BUS
SPEED
24
D+
USB
D–
Interface
Connector
24
GND
1µF
Micrel
Package
MIC2550

MIC2550 Summary of contents

  • Page 1

    ... MIC2550 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 (12Mb/s) dual supply volt- age operation (patent pending) and low-speed (1.5Mb/s) 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 ...

  • Page 2

    ... SPD 3 RCV GND 8 SUS 9 OE# 10 D– VTRM 14 VBUS MIC2550 14 VIF 1 13 SPD 2 RCV SUS GND 7 14-Pin TSSOP (TM) Pin Function System Interface Supply Voltage (Input): Determines logic voltage levels for system interface signaling to logic controller ...

  • Page 3

    ... BUS = 50pF, SPD = 600pF, SPD = 5.25V, SPD = 0 140 = 5.25V, SPD = 1 140 = 5.25V, SPD = 0 140 = 5.25V, SPD = 1 200 = 50pF, SPD = 1, = 600pF, SPD = 0 3.0 Micrel Max Units 5.25 V 5.25 V 0.15V 0 200 A 200 A 200 A 350 3.6 V MIC2550 ...

  • Page 4

    ... Note 3. Devices are ESD sensitive. Handling precautions recommended. Note 4. Applies to the VP, VM, RCV, OE#, SPD, and SUS pins. Note 5. Applies to D+, D– Note 6. Not production tested. Guaranteed by design. MIC2550 Condition 0V < V < 3.3V, D+, D–, OE pins only BUS (D+) – (D– 0.8V – 2.5V IN includes V ...

  • Page 5

    ... D– t PLH PLH D– 5 Min Typ PZV V CRS t PHL , and PHL and V to D+/D– Micrel Max Units MIC2550 ...

  • Page 6

    ... Test Circuits MIC2550 – – ...

  • Page 7

    ... The use of ESD transient protection devices is not required for operation, but is recommended. Nonmultiplexed Bus To save pin count for the USB logic controller interface, the MIC2550 was designed with interface the MIC2550 with a nonmultiplexed data bus, BUS , is used to resistors can be used for low cost isolation as shown in IF Figure 6. ...

  • Page 8

    ... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MIC2550 4.50 (0.177) DIMENSIONS: 6 ...