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.

Device Information

PART NUMBER⁽¹⁾	PACKAGE	BODY SIZE (NOM)⁽²⁾
TL331, TL331B, TL391B	SOT-23 (5)	2.90mm × 1.60mm

(1) For all available packages, see the orderable addendum at the end of the data sheet.

(2) The package size (length × width) is a nominal value and includes pins, where applicable.

Family Comparison Table

Specification	TL331B TL391B	TL331I	TL331K	Units
Supply Voltage	2 to 36	2 to 36	2 to 36	V
Total Supply Current (5V to 36V maximum)	0.43	0.7	0.7	mA
Temperature Range	−40 to 125	-40 to 85	-40 to 105	°C
ESD (HBM)	2000	1000	1000	V
Offset Voltage (maximum over temp)	± 4	± 9	± 9	mV
Input Bias Current (typical / maximum)	3.5 / 25	25 / 250	25 / 250	nA
Response Time (typical)	1	1.3	1.3	µsec