LTC2914

1

2914f

Quad UV/OV

Positive/Negative

Voltage Monitor

Monitored Voltage over Temperature

(5mm

× 3mm) DFN Packages

Quad UV/OV Supply Monitor,10% Tolerance, 5V, 3.3V, 2.5V, 1.8V

APPLICATIO S

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

monitoring multiple voltages in a variety of applications.

Dual inputs for each monitored voltage allow monitor-

ing four separate undervoltage (UV) conditions and four

separate overvoltage (OV) conditions. All monitors share a

common undervoltage output and a common overvoltage

output. The LTC2914-1 has latching capability for the

overvoltage output. The LTC2914-2 has functionality to

disable both the overvoltage and undervoltage outputs.

Polarity selection and a buffered reference allow monitoring

up to two separate negative voltages. A three-state input pin

allows setting the polarity of two inputs without requiring

any external components. Glitch filtering ensures reliable

reset operation without false or noisy triggering.

The LTC2914 provides a precise, versatile, space-con-

scious, micropower solution for voltage monitoring.

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

VH1

LTC2914-1

SYSTEM

2914 TA01a

0.1

µF

GND

TMR

VL1

VL2

VH2

REF

VL3

VH3

OV

UV

LATCH

SEL

VL4

22nF

TIMEOUT = 200ms

VH4

1k

4.53k

4.53k

12.4k

1k

19.6k

4.53k

27.4k

1k

44.2k

5V

3.3V

2.5V

1.8V

1k

4.53k

P0WER

SUPPLIES

Input Threshold Voltage

vs Temperature

TEMPERATURE (

°C)

–50

0.495

0.497

0.499

0.501

–25

0

25

50

2914 G01

75

0.503

0.505

0.496

0.498

0.500

0.502

0.504

100