ADG3257
器件描述：High Speed, 3.3 V/5 V Quad 2:1 Mux/Demux (4-Bit, 1 of 2) Bus Switch
器件厂商：AD [Analog Devices]
文件大小：173.28KB，共8页
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ADG3257
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 that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.
REV. C
High Speed, 3.3 V/5 V Quad 2:1 Mux/Demux
(4-Bit, 1 of 2) Bus Switch
FUNCTIONAL BLOCK DIAGRAM
1A
2A
3A
4A
4B
2
4B
1
3B
2
3B
1
2B
2
2B
1
1B
2
1B
1
BE S
LOGIC
FEATURES
100 ps Propagation Delay through the Switch
2 H9024 Switches Connect Inputs to Outputs
Data Rates up to 933 Mbps
Single 3.3 V/5 V Supply Operation
Level Translation Operation
Ultralow Quiescent Supply Current (1 nA Typical)
3.5 ns Switching
Standard ‘3257 Type Pinout
APPLICATIONS
Bus Switching
Bus Isolation
Level Translation
Memory Switching/Interleaving
PRODUCT HIGHLIGHTS
1. 0.1 ns propagation delay through switch
2. 2 Ω switches connect inputs to outputs
3. Bidirectional operation
4. Ultralow power dissipation
5. 16-lead QSOP package
Table I. Truth Table
BE S Function
HXDISABLE
LLA = B
1
LH = B
2
GENERAL DESCRIPTION
The ADG3257 is a CMOS bus switch comprised of four 2:1
multiplexers/demultiplexers with high impedance outputs. The
device is manufactured on a CMOS process. This provides low
power dissipation yet high switching speed and very low ON
resistance, allowing the inputs to be connected to the outputs
without adding propagation delay or generating additional ground
bounce noise.
The ADG3257 operates from a single 3.3 V/5 V supply. The
control logic for each switch is shown in Table I. These switches
are bidirectional when ON. In the OFF condition, signal levels are
blocked up to the supplies.
This bus switch is suited to both switching and level translation
applications. It may be used in applications requiring level
translation from 3.3 V to 2.5 V when powered from 3.3 V.
Additionally, with a diode connected in series with 5 V V
DD
,
the ADG3257 may also be used in applications requiring 5 V
to 3.3 V level translation.
ADG3257
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 that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.
REV. C
High Speed, 3.3 V/5 V Quad 2:1 Mux/Demux
(4-Bit, 1 of 2) Bus Switch
FUNCTIONAL BLOCK DIAGRAM
1A
2A
3A
4A
4B
2
4B
1
3B
2
3B
1
2B
2
2B
1
1B
2
1B
1
BE S
LOGIC
FEATURES
100 ps Propagation Delay through the Switch
2 H9024 Switches Connect Inputs to Outputs
Data Rates up to 933 Mbps
Single 3.3 V/5 V Supply Operation
Level Translation Operation
Ultralow Quiescent Supply Current (1 nA Typical)
3.5 ns Switching
Standard ‘3257 Type Pinout
APPLICATIONS
Bus Switching
Bus Isolation
Level Translation
Memory Switching/Interleaving
PRODUCT HIGHLIGHTS
1. 0.1 ns propagation delay through switch
2. 2 Ω switches connect inputs to outputs
3. Bidirectional operation
4. Ultralow power dissipation
5. 16-lead QSOP package
Table I. Truth Table
BE S Function
HXDISABLE
LLA = B
1
LH = B
2
GENERAL DESCRIPTION
The ADG3257 is a CMOS bus switch comprised of four 2:1
multiplexers/demultiplexers with high impedance outputs. The
device is manufactured on a CMOS process. This provides low
power dissipation yet high switching speed and very low ON
resistance, allowing the inputs to be connected to the outputs
without adding propagation delay or generating additional ground
bounce noise.
The ADG3257 operates from a single 3.3 V/5 V supply. The
control logic for each switch is shown in Table I. These switches
are bidirectional when ON. In the OFF condition, signal levels are
blocked up to the supplies.
This bus switch is suited to both switching and level translation
applications. It may be used in applications requiring level
translation from 3.3 V to 2.5 V when powered from 3.3 V.
Additionally, with a diode connected in series with 5 V V
DD
,
the ADG3257 may also be used in applications requiring 5 V
to 3.3 V level translation.