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Vishay Siliconix - Quad SPST CMOS Analog Switch

Numéro de référence DG221B
Description Quad SPST CMOS Analog Switch
Fabricant Vishay Siliconix 
Logo Vishay Siliconix 





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DG221B fiche technique
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DG221B
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Quad SPST CMOS Analog Switch with Latches
FEATURES
BENEFITS
APPLICATIONS
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
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
D mP Based Systems
D Automatic Test Equipment
D Communication Systems
D Data Acquisition Systems
D Medical Instrumentation
D Factory Automation
DESCRIPTION
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.
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.
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
Dual-In-Line and SOIC
IN1
D1
S1
V–
GND
S4
D4
IN4
1
2
3
4
5
6
7
8
16 IN2
15 D2
14 S2
13 V+
12 WR
11 S3
10 D3
9 IN3
Top View
Four Latchable SPST Switches per Package
TRUTH TABLE
INX WR
Switch
00
ON
10
OFF
Control data latched-in,
X switches on or off as selected
by last INX
X 1 Maintains previous state
Logic “0” v 0.8 V
Logic “1” w 2.4 V
ORDERING INFORMATION
Temp Range
Package
Part Number
–40_C to 85_C
16-Pin Plastic DIP
16-Pin Narrow SOIC
DG221BDJ
DG221BDY
Document Number: 71616
S-03627—Rev. A, 23-Apr-01
www.vishay.com
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