LTC2908 Linear Technology, LTC2908 Datasheet - Page 4

• Manufacturer Part Number: LTC2908
• Description: Precision Six Input Supply Monitor
• Manufacturer: Linear Technology

LTC2908
ELECTRICAL CHARACTERISTICS
SYMBOL
t
t
V
V
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliabilty and lifetime.
Note 2: The greater of V1, V2 is the internal supply voltage (V
LTC2908-A1 and the LTC2908-B1. V1 is the internal supply voltage (V
for the LTC2908-C1.
TYPICAL PERFORMANCE CHARACTERISTICS
Specifi cations are at T
4
The
for the LT2908-A1, V
RST
UV
OH
OL
4.750
4.725
4.700
4.675
4.650
4.625
4.600
●
–50
denotes specifi cations which apply over the full operating temperature range, otherwise specifi cations are T
5V Threshold Voltage
vs Temperature
–25
TEMPERATURE (°C)
0
PARAMETER
Reset Time-Out Period
V
Output Voltage High RST (Note 5)
Output Voltage Low RST
X
CC
Undervoltage Detect to RST
A
= 3.3V for the LTC2908-B1 or V
25
= 25°C unless otherwise noted.
50
75
2908 G01
100
3.135
3.115
3.095
3.075
3.055
3.035
–50
3.3V Threshold Voltage
vs Temperature
CC
CC
CONDITIONS
V
More Than 1%
I
I
I
V
V
V
RST
RST
RST
= 2.5V for the LTC2908-C1, unless otherwise noted. (Notes 2, 3)
) for the
X
CC
CC
CC
–25
Less Than Reset Threshold V
= 0.5V, I
= 1.0V, I
= 3.0V, I
= –1μA, V
= –1μA, V
= –1μA, V
CC
TEMPERATURE (°C)
)
0
RST
RST
RST
CC
CC
CC
Note 3: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 4: Under typical operating conditions, most of the quiescent cur-
rent is drawn from the V1 input. When V2 exceeds V1, V2 supplies most
of the quiescent current.
Note 5: The output pin RST has an internal pull-up to V
6μA. However, an external pull-up resistor may be used when a faster
rise time is required or for V
25
= 5μA
= 100μA
= 2500μA
= 5V (LTC2908-A1)
= 3.3V (LTC2908-B1)
= 2.5V (LTC2908-C1)
50
75
2908 G02
RTX
100
by
2.375
2.360
2.345
2.330
2.315
2.300
OH
l
l
l
l
l
l
l
voltages greater than V
–50
2.5V Threshold Voltage
vs Temperature
V
V
V
CC
CC
CC
MIN
160
– 1.5
– 1.0
– 1.0
–25
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TEMPERATURE (°C)
0
0.01
0.01
0.10
TYP
200
250
A
25
= 25°C. V
CC
CC
MAX
0.15
0.15
0.30
.
260
of typically
50
CC
75
= 5V
UNITS
2908 G03
2908fc
ms
100
μs
V
V
V
V
V
V