DG444B/445B
New Product
Vishay Siliconix
Improved Quad SPST CMOS Analog Switches
FEATURES
D
D
D
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D
Low On-Resistance: 45
W
Low Power Consumption: 1.0 mW
Fast Switching Action—t
ON
: 120 ns
Low Charge Injection
TTL/CMOS Logic Compatible
BENEFITS
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Low Signal Errors and Distortion
Reduced Power Supply Consumption
Faster Throughput
Reduced Pedestal Errors
Simple Interfacing
APPLICATIONS
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Audio Switching
Data Acquisition
Sample-and-Hold Circuits
Communication Systems
Automatic Test Equipment
Medical Instruments
DESCRIPTION
The DG444B/445B are monolithic quad analog switches
designed to provide high speed, low error switching of analog
and audio signals. The DG444B/445B are upgrades to the
original DG444/445.
Combing low on-resistance (45
Ω,
typ.) with high speed (t
ON
120 ns, typ.), the DG444B/445B are ideally suited for Data
Acquisition, Communication Systems, Automatic Test
Equipment, or Medical Instrumentation. Charge injection has
been minimized on the drain for use in sample-and-hold
circuits.
The DG444B/445B are built using Vishay Siliconix’s
high-voltage silicon-gate process. An epitaxial layer prevents
latchup.
When on, each switch conducts equally well in both directions
and blocks input voltages to the supply levels when off.
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
DG444B
Dual-In-Line and SOIC
IN
1
D
1
S
1
V−
GND
S
4
D
4
IN
4
1
2
3
4
5
6
7
8
Top View
16
15
14
13
12
11
10
9
IN
2
D
2
S
2
V+
V
L
S
3
D
3
IN
3
TRUTH TABLE
Logic
0
1
DG444B
ON
OFF
Logic “0”
v
0.8 V
Logic “1”
w
2.4 V
DG445B
OFF
ON
DG444B
QFN16 (4x4 mm)
D
1
IN
1
IN
2
D
2
16
15
14
13
ORDERING INFORMATION
Temp Range
Package
16-Pin
16 Pin Plastic DIP
12
11
10
9
S
2
V+
V
L
S
3
16-Pin
16 Pin QFN 4x4 mm
−40
to 85_C
40
16-Pin
16 Pin Narrow SOIC
Part Number
DG444BDJ
DG445BDJ
DG444BDY
DG445BDY
DG444BDN
DG445BDN
S
1
V−
GND
S
4
1
2
3
4
5
6
7
8
D
4
IN
4
IN
3
D
3
Top View
Document Number: 72626
S-32554—Rev. A, 15-Dec-03
www.vishay.com
1
VISHAY [ VISHAY TELEFUNKEN ]
