PI3USB42
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
USB2.0 High-Speed (480Mbps) Signal Switch With Vbus Short Protection
Features
Description
•
•
•
•
•
•
•
•
•
•
•
USB 2.0 compliant (high speed and full speed)
The PI3USB42 is a single differential channel 2:1
multiplexer/demultiplexer USB 2.0 Switch. Industry
leading advantages include a propagation delay of less
than 250ps, resulting from its low channel resistance and
I/O capacitance. The device multiplexes differential
outputs from a USB Host device to one of two
corresponding outputs. The switch is bidirectional and
offers little or no attenuation of the high-speed signals at
the outputs. It is designed for low bit-to-bit skew, high
channel-to-channel noise isolation and is compatible
with various standards, such as High Speed USB 2.0
(480 Mb/s).
RON is 4.0Ω typical @ VDD = 3.0V
Low bit-to-bit skew
Low Crosstalk: -41dB @ 240 MHz
Off Isolation: -37dB @ 240 MHz
Wide -3db bandwidth: 770MHz
Near-Zero propagation delay: 250ps
Support for 1.8V/2.5V/3.3V Logic on Control pins
Channel On Capacitance: 6.0pF
VDD Operating Range: 1.8V to 4.3V ±10%
Data pin I/O ESD: >8kV HBM protection per
JESD22-A114D specification
•
•
I/O pins have over-voltage protection and can
tolerate a short to Vbus
The PI3USB42 offers overvoltage protection per the
USB2.0 specification. With the chip powered on or off,
all I/O pins can withstand a short to Vbus (5V +/-10%).
If VDD=0V, the I/Os can still have signals present, and
the signal will NOT leak through to VDD.
Packaging (Pb-free & Green): 10-pin UQFN (ZM10)
Applications
•
•
•
•
Route signals for USB 2.0
Functional Block Diagram
Cell phone, PDA, Digital camera and Notebook
LCD Monitor ,TV, Set-top box
Portable device
D+A
D+
D+B
Pin Description
D-A
Pin No
Pin
Name
D+
Description
USB Data bus
USB Data bus
Ground
Multiplexed Source Inputs
Multiplexed Source Inputs
Multiplexed Source Inputs
Multiplexed Source Inputs
Switch Enable
D-
D-B
1
2
D-
/OE
3
4
5
6
7
8
GND
D-A
D+A
D-B
D+B
/OE
SEL
LOGIC
Pin Assignment
9
10
VDD
SEL
Positive Power Supply
Switch Select
Logic Function Table
/OE
H
SEL
X
Function
I/O’s = Hi-Z
L
L
L
H
D(+/-) to D(+/-)A
D(+/-) to D(+/-)B
2011-11-0004
PT0378-1
8/26/11
1