Atmel Unveils Smallest Footprint UHF ASK/FSK Receiver ICs for TPMS and RKE Applications

Heilbronn, Germany (ots/PRNewswire) -

- Best Trade-off of Large Bandwidth and High Selectivity

Atmel(R) Corporation (Nasdaq: ATML), a global leader in the
development and fabrication of advanced semiconductor solutions,
announced today the availability of the new ATA5745 and ATA5746 UHF
ASK/FSK receiver ICs, extending Atmel's broad existing portfolio of
automotive RF devices. The ATA5745 operates at 433 to 435 MHz,
whereas the ATA5746 covers the 313 to 315-MHz frequency band for the
standard automotive environment. These single-chip devices are
manufactured using Atmel's new RF BiCMOS process UHF6S, enabling even
smaller designs. With a size of 5 mm x 5 mm, they provide the
industry's smallest footprints, a perfect fit for Remote Keyless
Entry (RKE) and Tire Pressure Monitoring System (TPMS) applications.

These devices provide the best combination of large bandwidth and
excellent receiving selectivity thanks to their fully-integrated
filters. This allows system designers to develop a broad range of
TPMS and RKE solutions, ranging from highly sophisticated to very low
cost, whereas competing solutions cannot be used for such low-cost
systems due to their smaller bandwidth. The new receiver ICs need few
external devices and no external filters which add to the
cost-efficiency of the end systems. Eight passive components, a
crystal, and an RF antenna are typically all that is needed to create
a receiver board application. Thanks to the ICs' large oscillation
margin, designers can apply very low-cost crystals.

Due to their fast switching capability between TPMS and RKE
signals, the ATA5745 and ATA5746 can be used in unified RKE/TPMS
automotive application environments with different system
definitions, thus eliminating the need for two separate RKE and TPMS
ICs. The ICs' ability to change the modulation type between ASK and
FSK, and between data rates without component changes, is important
when receiving different RKE/TPMS modulation schemes and data rates.
They can be operated in 1 to 20-Kbit/s Manchester FSK mode with four
different baud rate ranges, selectable through the microcontroller
without any hardware modification on board. The typical switching
between modulation types ASK/FSK and different data rates is possible
in less 1 ms.

These receiver ICs consist of an integrated IF filter,
low-phase-noise VCO, PLL, and loop filter without requiring any
external parts for these functional blocks. The totally integrated RF
circuits achieve an image rejection of typically 30 dB. The
ATA5745/ATA5746 are transparent receivers and operate in combination
with a separate microcontroller for bit check and polling modes.

The active current consumption is specified at about 6.5 mA in
receiving mode and is based on single-ended RF input for easy
adaptation of lambda/4 or printed loop antennas.

The devices support header and blanking periods in ASK mode, as
required by typical protocols used in the USA with a telegram pause
length up to 52 ms.

Samples are available now in QFN24 packages. Pricing for the
ATA5745/ATA5746 starts at US $1.40 (at 10kpc quantities). To support
the system designer, Atmel provides the evaluation boards ATA5745-EK
and ATA5746-EK at a cost of US $ 99.

Footnote
ASK = Alternating Shift Keying
FSK = Frequency Shift Keying
PLL = Phase Locked Loop
RKE = Remote Keyless Entry
TPMS = Tire Pressure Monitoring Systems
UHF = Ultra High Frequency
VCO = Voltage Controlled Oscillator

About Atmel

Atmel is a worldwide leader in the design and manufacture of
microcontrollers, advanced logic, mixed-signal, nonvolatile memory
and radio frequency (RF) components. Leveraging one of the industry's
broadest intellectual property (IP) technology portfolios, Atmel is
able to provide the electronics industry with complete system
solutions. Focused on consumer, industrial, security, communications,
computing and automotive markets, Atmel ICs can be found Everywhere
You Are(R).

NOTE: Atmel(R), logo and combinations thereof, Everywhere You
Are(R) and others are registered trademarks or trademarks of Atmel
Corporation or its subsidiaries. Other terms and product names may be
trademarks of others.

Information

Product information on Atmel's new UHF ASK/FSK receiver ICs
ATA5745/ATA5746 may be retrieved at: http://www.atmel.com/dyn/product
s/product_card.asp?family_id=606&family_name=
Automotive+Control&part_id=3961 (ATA5745) and http://www.atmel.com/dy
n/products/product_card.asp?family_id=606&family_name=
Automotive+Control&part_id=3962 (ATA5746)

Press Contacts
Dr. Susanne van Clewe, Marcom Manager Communications and Automotive
Products
Phone: +49-7131-67-2081, Email: susanne.van-clewe@hno.atmel.com
Helen Perlegos, Public Relations - USA and Asia Pacific
Phone: +1-408-487-2963, Email: hperlegos@atmel.com
Veronique Sablereau, Corporate Communications Manager - Europe
Phone: +33-1-30-60-70-68, Fax: +49-7131-67-2423, Email:
veronique.sablereau@atmel.com

Web site: http://www.atmel.com

ots Originaltext: Atmel Corporation
Im Internet recherchierbar: http://www.presseportal.de

Contact:
Dr. Susanne van Clewe, Marcom Manager Communications and Automotive
Products, +49-7131- 67-2081, or susanne.van-clewe@hno.atmel.com, or
Helen Perlegos, Public Relations - USA and Asia Pacific,
+1-408-487-2963, or hperlegos@atmel.com, or Veronique Sablereau,
Corporate Communications Manager - Europe, +33-1-30-60-70-68, or fax,
+49-7131-67-2423, or
veronique.sablereau@atmel.com