DG221B

Manufacturer Part NumberDG221B
DescriptionQuad SPST CMOS Analog Switch
ManufacturerVishay Siliconix
DG221B datasheet
 


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Quad SPST CMOS Analog Switch with Latches
D Accepts 150-ns Write Pulse Width
D 5-V On-Chip Regulator
D Latches Are Transparent with WR Low
D Low On-Resistance: 60 W
The DG221B is a monolithic quad single-pole, single-throw
analog switch designed for precision switching applications in
communication, instrumentation and process control systems.
Featuring independent onboard latches and a common WR
pin, each DG221B can be memory mapped, and addressed as
a single data byte for simultaneous switching.
Dual-In-Line and SOIC
IN
1
1
D
1
2
S
1
3
V–
4
GND
5
S
6
4
D
4
7
IN
4
8
Top View
Document Number: 71616
S-03627—Rev. A, 23-Apr-01
New Product
D Compatible with Most mP Buses
D Allows Wide Power Supply Tolerance
Without Affecting TTL Compatibility
D Reduced Power Consumption
D Allows Flexibility of Design
The DG221B combines low power and low on-resistance (60
W typical) while handling continuous currents up to 20 mA. An
epitaxial layer prevents latchup.
The device features true bidirectional performance in the on
condition.
Four Latchable SPST Switches per Package
IN
X
IN
16
2
0
D
15
2
1
S
14
2
X
V+
13
X
WR
12
S
11
3
D
10
3
IN
9
3
Temp Range
_
_
–40_C to 85_C
DG221B
www.DataSheet4U.com
Vishay Siliconix
D mP Based Systems
D Automatic Test Equipment
D Communication Systems
D Data Acquisition Systems
D Medical Instrumentation
D Factory Automation
WR
Switch
0
ON
0
OFF
Control data latched-in,
switches on or off as selected
by last IN
X
1
Maintains previous state
Logic “0” v 0.8 V
Logic “1” w 2.4 V
Package
Part Number
16-Pin Plastic DIP
DG221BDJ
16-Pin Narrow SOIC
DG221BDY
www.vishay.com
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