Has anybody else seen these? any opinions?
It's a SPI based full speed USB interface
MAX3420E

Press release:
<http://www.maxim-ic.com/view_press_release.cfm/release_id/1152>

Product page <http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4751>

>From the product page:
The MAX3420E contains the digital logic and analog circuitry necessary to
implement a full-speed USB peripheral compliant to USB specification rev
2.0. A built-in full-speed transceiver features =B115kV ESD protection and
programmable USB connect and disconnect. An internal SIE (serial-interface
engine) handles low-level USB protocol details such as error checking and
bus retries. The MAX3420E operates using a register set accessed by an SPI
interface that operates up to 26MHz. Any SPI master (microprocessor, ASIC,
DSP, etc.) can add USB functionality using the simple 3- or 4-wire SPI
interface.

Internal level translators allow the SPI interface to run at a system
voltage between 1.71V and 3.6V. USB timed operations are done inside the
MAX3420E with interrupts provided at completion so an SPI master does not
need timers to meet USB timing requirements. The MAX3420E includes four
general-purpose inputs and outputs so any microprocessor that uses I/O pins
to implement the SPI interface can reclaim the I/O pins and gain additional
ones.

The MAX3420E operates over the extended -40=B0C to +85=B0C temperature rang=
e and
is available in a 32-pin TQFP package (7mm x 7mm) and a space-saving 24- pin
TQFN package (4mm x 4mm).



-Denny

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