Driving the Communications Revolution
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USB 2.0 Compliant
480/12/1.5-Mbps operation
4 transaction translators
(‘Tetra’ Architecture)
56-lead QFN package
Integrated components
Individual or ganged port
power switching and over
current detection
Integrated phase-locked
loop
Dedicated LED ports
Highlights
www.cypress.com
1.5 kΩ pull-up resistor
on D+
15 kΩ pull-down
resistors on
downstream ports
TM
USB 2.0 4-Port Hub
The TetraHub
offers a complete reference design for developing a fixed function 4-port USB 2.0
Hub that is production ready and USB 2.0 compliant.
This single chip design is based on the CY7C65640-LFC, offering a space saving
and cost effective package. Because it is USB 2.0 compliant it is fully backward
compatible with USB 1.1 systems. It provides for up to four downstream ports, and
supports High Speed, Full Speed and Low Speed traffic. No firmware development
is required for this design, thereby reducing design risk and time-to-market.
Our Reference Design Kits include a fully functional demonstration board as well as
all of the design materials you will need to expedite the development of your custom
product. Cypress provides faster time-to-market and the lowest overall system cost
with our TetraHub Reference Design.
24 MHz Crystal
Downstream USB Port 1
Status
Port
TetraHub
USB Upstream Port
PLL
Hub Repeater
USB 2.0 PHY
Reference Design – CY4602
USB 2.0
PHY
TM
D+ D-
Control
Power
Port
is the highest performance USB 2.0 hub solution available. Cypress
Downstream USB Port 1
Status
Port
TM
USB 2.0
PHY
USB 2.0 4-Port Hub
Control
Power
Port
Routing Logic
Interface
Engine
Serial
Transaction Translator (x4)
Downstream USB Port 1
Transaction Translator (x4)
Status
Transaction Translator (x4)
Port
Transaction Translator (x4)
USB 2.0
TT RAM
PHY
TT RAM
TT RAM
TT RAM
Control
Power
Port
SPI Communication
SCK
Downstream USB Port 1
SPI
Status
High Speed USB
Port
Control Logic
Block
USB 2.0
SPI
SD
PHY
Control
SPD
Power
CS
Port
17 April 2002