LTC2914 Datasheet, PDF (1/16 Pages) Linear Technology – Quad UV/OV Positive/Negative Voltage Monitor

FEATURES
■ _{Monitors Four Voltages Simultaneously}
■ _{Adjustable UV and OV Trip Values}
■ _{Guaranteed Threshold Accuracy: ±1.5% of}
Monitored Voltage over Temperature
■ _{Input Glitch Rejection}
■ _{Monitors up to Two Negative Voltages}
■ _{Buffered 1V Reference Output}
■ _{Adjustable Reset Timeout with Timeout Disable}
■ _{70µA Quiescent Current}
■ _{Open-Drain OV and UV Outputs}
■ _{Guaranteed OV and UV for VCC ≥ 1V}
■ _{Available in 16-Lead SSOP and 16-Lead}
(5mm × 3mm) DFN Packages
U
APPLICATIO S
■ _{Desktop and Notebook Computers}
■ _{Network Servers}
■ _{Core, I/O Voltage Monitors}
LTC2914
Quad UV/OV
Positive/Negative
Voltage Monitor
DESCRIPTIO
The LTC^®2914 is a quad input voltage monitor intended for
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.
TYPICAL APPLICATIO
Quad UV/OV Supply Monitor,10% Tolerance, 5V, 3.3V, 2.5V, 1.8V
5V
3.3V
P0WER
SUPPLIES
2.5V
1.8V
0.1µF
44.2k
1k
4.53k
27.4k
1k
4.53k
19.6k
1k
4.53k
V_CC
VH1
SEL
VL1
OV
VH2
LTC2914-1
SYSTEM
VL2
UV
REF
VH3 LATCH
12.4k
VL3
VH4
1k
VL4
GND
4.53k
TMR
C_TMR
2914 TA01a
22nF
TIMEOUT = 200ms
0.505
0.504
0.503
0.502
0.501
0.500
0.499
0.498
0.497
0.496
0.495
– 50
Input Threshold Voltage
vs Temperature
–25 0 25 50
TEMPERATURE (°C)
75 100
2914 G01
2914f
1