1 Features
• NEW TL331B and TL391B
• Improved specifications of B-version
– Maximum rating: up to 38V
– ESD rating (HBM): 2kV
– Improved reverse voltage performance
– Low input offset: 0.37mV
– Low input bias current: 3.5nA
– Low supply-current: 430μA
– Faster response time of 1μsec
– TL391B provides an alternate pinout
• TL331B is improved drop-in replacement for
TL331
• Common-mode input voltage range includes
ground
• Differential input voltage range equal to maximumrated
supply voltage: ±38V
• Low output saturation voltage
• Output compatible with TTL, MOS, and CMOS

2 Applications
. Vacuum robot
. Single phase UPS
. Server PSU
. Cordless power tool
. Wireless infrastructure
. Appliances
. Building automation
. Factory automation & control
. Motor drives
. Infotainment & cluster

3 Description
The TL331B and TL391B devices are the next
generation versions of the industry-standard TL331
comparator. These next generation devices provide
outstanding value for cost-sensitive applications,
with features including lower offset voltage, higher
supply voltage capability, lower supply current,
lower input bias current, lower propagation delay,
wider temperature range and improved 2kV ESD
performance with drop-in replacement convenience.
The TL331B is a drop-in improved replacement for
both the TL331I and TL331K versions, while the
TL391B provides an alternate pinout of the TL331B
to replace competitive devices.
Operation from dual supplies also is possible as long
as the difference between the two supplies is within
2V to 36V, and VCC is at least 1.5V more positive
than the input common-mode voltage. Current drain
is independent of the supply voltage. The outputs
can be connected to other open-collector outputs to
achieve wired-AND relationships.