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LTC2901 Datasheet(PDF) 3 Page - Linear Technology

Part No. LTC2901
Description  Programmable Quad Supply Monitor with Adjustable Reset and Watchdog Timers
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Maker  LINER [Linear Technology]
Homepage  http://www.linear.com
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LTC2901 Datasheet(HTML) 3 Page - Linear Technology

 
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LTC2901
2901is sn2901
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
tUV
VX Undervoltage Detect to RST or COMPX
VX Less Than Reset Threshold VRTX
150
µs
by More Than 1%
VOL
Output Voltage Low RST, COMPX
ISINK = 2.5mA; V1 = 3V, V2 = 3V;
q
0.15
0.4
V
V3, V4 = 0V; VPG = 0V
ISINK = 100µA; V2 = 1V; V1, V3, V4 = 0V
q
0.05
0.3
V
ISINK = 100µA; V1 = 1V; V2, V3, V4 = 0V
q
0.05
0.3
V
VOH
Output Voltage High RST, WDO, COMPX
ISOURCE = 1µA
q
V2 – 1
V
(Note 5)
VOL
Output Voltage Low WDO
ISINK = 2.5mA; V1 = 5V, V2 = 3.3V;
q
0.15
0.4
V
V3, V4 = 1V; VPG = 0V
VOH
Output Voltage High RST (LTC2901-2)
ISOURCE = 200µA
q
0.8 • V2
V
(Note 6)
ICWT(UP)
CWT Pull-Up Current
VCWT = 0V
q
–1.4
–2
–2.6
µA
ICWT(DN)
CWT Pull-Down Current
VCWT = 1.3V
q
10
20
30
µA
tWD
Watchdog Time-Out Period
CWT = 1500pF
q
20
30
40
ms
VIH
WDI Input Threshold High
VCC = 3.3V to 5.5V
q
1.6
V
VIL
WDI Input Threshold Low
VCC = 3.3V to 5.5V
q
0.4
V
tWP
WDI Input Pulse Width
VCC = 3.3V
q
150
ns
IWDI
WDI Pull-Up Current
VWDI = 0V
–10
µA
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, unless otherwise noted. (Note 3)
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life of
a device may be impaired.
Note 2: All voltage values are with respect to GND.
Note 3: The greater of V1, V2 is the internal supply voltage (VCC).
Note 4: Under static no-fault conditions, V1 will necessarily supply quiescent
current. If at any time V2 is larger than V1, V2 must be capable of supplying
the quiescent current, programming (transient) current and reference load
current.
Note 5: The output pins RST, WDO and COMPX have internal pull-ups to V2
of typically 6
µA. However, external pull-up resistors may be used when faster
rise times are required or for VOH voltages greater than V2.
Note 6: The push-pull RST output pin on the LTC2901-2 is
actively pulled up
to V2.


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