DG221B Datasheet, PDF (1/6 Pages) Vishay Siliconix – Quad SPST CMOS Analog Switch with Latches

New Product
DG221B
Vishay Siliconix
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
IN_{1 1}
D_{1 2}
S_{1 3}
V– ₄
GND ₅
S_{4 6}
D_{4 7}
IN_{4 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
IN_X
WR
Switch
0
0
ON
1
0
OFF
Control data latched-in,
X
switches on or off as selected
by last IN_X
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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