Choosing the Right Device for your USB Application
4
Cypress USB Hub Device Selection Guide
Cypress offers a broad family of full-speed USB devices for
hub applications ideally suited for integrated keyboard, moth-
erboard and monitor hubs. Also included in Cypress’s USB
hub device family are stand alone USB hubs (up to 7 down-
stream ports). The OTP PROM-based solution provides high
flexibility, thus enabling fast time to market.
Cypress has also announced TetraHub™ (CY7C65640), a
high-performance standalone Universal Serial Bus (USB)
hub controller, compliant with the USB 2.0 Specification.
Cypress's innovative ‘Tet r a’ architecture provides four down-
stream USB ports and four “Transaction Translators” (TT),
making it the highest performance hub available. This self-
contained device features an integrated SIE, hub controller,
hub repeater, four transaction translators, and USB data
transceivers. TetraHub is a fixed-function solution, requiring
no firmware intervention, thereby reducing design risk and
development time. TetraHub can improve time-to-market in a
number of USB 2.0 designs, including standalone hubs,
motherboard hubs, and monitor hubs.
TetraHub is a self-powered USB 2.0 hub device. Power man-
agement for all downstream ports supports power switching
and overcurrent detection with individual or ganged control.
The four downstream ports support High Speed, Full Speed
and Low Speed devices. Four individual transaction transla-
tors have been implemented, providing full 12 Mbps perfor-
mance to each full-speed downstream port, whereas single
transaction translator designs must split the Full Speed band-
width between all USB 1.1 peripherals attached to the hub.
TetraHub has a Serial Peripheral Interface (SPI) communica-
tion block, allowing easy implementation in a number of USB
hub applications, while also allowing for user customization of
vendor and product IDs. Cypress has also integrated the
1.5KOhm pull-up resistor on the D+ line which is required for
connect/disconnect detection on the upstream USB port.
Note:
1. Contact your local Cypress sales representative for more details.
Table 2. Cypress USB Hub Device Selection Guide
CY7C65X13 CY7C66X13 CY7C65100 CY7C65640
Typical
Applications
4-port Standalone
USB Hub
7-port Standalone
USB Hub
USB Peripheral +
4-port USB Hub
Fixed-function
4-port USB
Standalone Hub
4-port USB 2.0 Hub
EPROM
8 KB 8 KB N/A N/A
I/Os
11-22 29-31 Supports ganged and
individual port power switch-
ing, as well as bus powered
and self-powered.
Supports ganged and
individual port power
switching
Package Types
Also available in
bare die form;
volume restric-
tions apply
[1]
28-pin PDIP/SOIC
48-pin PDIP/SSOP
48-pin PDIP
48-pin SSOP
56-pin SSOP
28-pin SOIC 56-pin QFN
Development
Kit
CY3654 +
CY3654-P03
CY3654 +
CY3654-P03
N/A N/A
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