PRELIMINARY TECHNICAL DATA
Low Voltage 1.2 V to 5.5 V,
a
Bidirectional,LogicLevelTranslators
Preliminary Technical Data
ADG3308
FEATURES
F U NC T IO NAL B LO C K D IAG RAM
Bidirectional Level Translation
Operates from 1.2 V to 5.5 V
Low Quiescent Current <5µA
V
V
CCY
CCA
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
A1
A2
A3
A4
A5
A6
A7
APPLICATIONS
SPITM, Microw ireTM and I2CTM Translation
Low Voltage ASIC level Translation
Sm art Card Readers
Cell Phones & Cell-Phone Cradles
Portable Com m unication Devices
Telecom m unicatons Equipm ent
Netw ork Sw itches and Routers
Storage System s (SAN/ NAS)
Com puting/ Server Applications
GPS
A8
EN
Portable POS System s
Low Cost Serial Interfaces
GND
G E NE R AL D E S C R IP T IO N
P R O D U C T H IG H LIG H T S
1. Bidirectional Level T ranslation.
2. T he ADG3308 is fully guaranteed from 1.2 V to
5.5 V supply range.
T he ADG3308 is an 8-Channel bidirectional level transla-
tor. Its function is to provide level shifting in a multi-
voltage system. T he voltage applied to VCCA sets up the
logic levels on the A side of the device, while VCCY sets
the levels on the Y side. In this way, signals applied to the
VCCA side of the device appear as VCCY compatible logic
on the other side of the device and vice versa as the device
is designed to handle bidirectional signals. T he device is
guaranteed for operation over the supply range 1.2 V to
5.5 V.
3. 20 lead T SSOP and LFCSP (4mm x4mm) packages.
T hese devices are suited to applications like data transfer
between a low voltage DSP/Controller and a higher
voltage device. Other applications include high end
consumer products where constant changes to the chipset
desgins result in multiple supply levels in the application.
VCCY operates from +1.65 to 5.5 V while VCCA from +1.2
to VCCY. VCCA must always operate from a supply that is
lower than VCCY. When the device Enable pin (EN) is
pulled low, the Ax and Yx inputs/outputs are tri-stated.
T he EN pin is driven high for normal operation. EN pin
is referred to VCCY voltage.
REV. PrE Feb 2004
Inform ation furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assum ed by Analog Devices for its
use, nor for any infringem ents of patents or other rights of third parties
which m ay result from its use. No license is granted by im plication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.
Tel: 781/ 329-4700
Fax: 781/ 326-8703
World Wide Web Site: http:/ / w w w.analog.com
Analog Devices, Inc., 2004