REV. PrE Feb 2004
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Preliminary Technical Data ADG3308
PRELIMINARY TECHNICAL DATA
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 Analog Devices, Inc., 2004
Low Voltage 1.2 V to 5.5 V,
Bidirectional, Logic Level Translators
FUNCTIONAL BLOCK DIAGRAMFEATURES
Bidirectional Level Translation
Operates from 1.2 V to 5.5 V
Low Quiescent Current <5µA
APPLICATIONS
SPI
TM
, Microwire
TM
and I
2
C
TM
Translation
Low Voltage ASIC level Translation
Smart Card Readers
Cell Phones & Cell-Phone Cradles
Portable Communication Devices
Telecommunicatons Equipment
Network Switches and Routers
Storage Systems (SAN/NAS)
Computing/Server Applications
GPS
Portable POS Systems
Low Cost Serial Interfaces
GENERAL DESCRIPTION
The ADG3308 is an 8-Channel bidirectional level transla-
tor. Its function is to provide level shifting in a multi-
voltage system. The voltage applied to V
CCA
sets up the
logic levels on the A side of the device, while V
CCY
sets
the levels on the Y side. In this way, signals applied to the
V
CCA
side of the device appear as V
CCY
compatible logic
on the other side of the device and vice versa as the device
is designed to handle bidirectional signals. The device is
guaranteed for operation over the supply range 1.2 V to
5.5 V.
These 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.
V
CCY
operates from +1.65 to 5.5 V while V
CCA
from +1.2
to V
CCY
. V
CCA
must always operate from a supply that is
lower than V
CCY
. When the device Enable pin (EN) is
pulled low, the Ax and Yx inputs/outputs are tri-stated.
The EN pin is driven high for normal operation. EN pin
is referred to V
CCY
voltage.
PRODUCT HIGHLIGHTS
1. Bidirectional Level Translation.
2. The ADG3308 is fully guaranteed from 1.2 V to
5.5 V supply range.
3. 20 lead TSSOP and LFCSP (4mm x4mm) packages.
A1 Y1
GND
V
CCY
V
CCA
A8 Y8
A7 Y7
A6 Y6
A5 Y5
A4 Y4
A3 Y3
A2 Y2
EN