FEATURES
• Accepts 150 ns write pulse width
• 5 V on-chip regulator
• Latches are transparent with WR low
• Low on-resistance: 60 W

BENEFITS
• Compatible with most μP buses
• Allows wide power supply tolerance without affecting TTL
compatibility
• Reduced power consumption
• Allows flexibility of design

APPLICATIONS
• μP based systems
• Automatic test equipment
• Communication systems
• Data acquisition systems
• Medical instrumentation
• 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 typical) while handling continuous currents up to 20 mA.
An epitaxial layer prevents latchup.
The device features true bidirectional performance in the on
condition.