Features
 700mA Output Source Current
 Zero Quiescent Off Current
 Full Channel Isolation to Prevent Fault
Propagation
 Internal Ground Clamp Diodes
 75V Output Breakdown Voltage
 TTL, 5V and 12V Logic Compatible
 Internal Thermal Shutdown
 Radiation tolerant to 100kRad(Si) Total Dose,
50kRad (Si) ELDRS
 -55°C to +125°C Temperature Range
 Available in 20-pin Ceramic SOIC with formed
and flat Leads
 QML listed with SMD 5962-15231

Applications
 Relay/Solenoid Drivers
 Lamp/LED Drivers
 Stepper and/or Servo Motor Drivers

Description
The AAHS298B is part of Microsemi’s new family of
Radiation Tolerant products aimed at the aerospace
and defense markets. The AAHS298B is a Radiation-
Tolerant source driver with eight non-inverting
channels, with internal thermal shutdown.
Capable of providing an interface from TTL, 5V or 12V
logic systems to relays, motors, solenoids, and other
loads, this device adds the additional benefit of an
internal thermal shutdown and output transient
protection/clamp diodes with sustaining voltages to
75V.
Each output is capable of sourcing 700mA with a
withstand voltage of 75V over the full military
temperature range. The thermal shutdown is intended
to protect against over-current and soft-start
occurrences.
The AAHS298B is offered in 20-pin ceramic SOIC
package with formed and flat leads. The AAHS298B
has demonstrated tolerance to 100kRad (Si) total dose
min), 50kRad (Si) ELDRS (min), as well as immunity
to latch-up and SEE tolerance.