ADG3308 Datasheet, PDF (1/5 Pages) Analog Devices – Low Voltage 1.2 V to 5.5 V, Bidirectional, Logic Level Translators

PRELIMINARY TECHNICAL DATA
a
Low Voltage 1.2 V to 5.5 V,
Bidirectional, Logic Level Translators
Preliminary Technical Data
ADG3308
FEATURES
Bidirectional Level Translation
Operates from 1.2 V to 5.5 V
Low Quiescent Current <5µA
APPLICATIONS
SPI^TM, Microwire^TM and I²C^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
FUNCTIONAL BLOCK DIAGRAM
VCCA
VCCY
A1
Y1
A2
Y2
A3
Y3
A4
Y4
A5
Y5
A6
Y6
A7
Y7
A8
Y8
EN
GND
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.
REV. PrE Feb 2004
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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Analog Devices, Inc., 2004