MAX6801UR32D2-T Maxim Integrated, MAX6801UR32D2-T Datasheet - Page 5

• Manufacturer Part Number: MAX6801UR32D2-T
• Description: Supervisory Circuits
• Manufacturer: Maxim Integrated
• Series: MAX6800, MAX6801, MAX6802r

Specifications of MAX6801UR32D2-T

• Number Of Voltages Monitored: 1
• Monitored Voltage: 2.85 V to 5 V
• Undervoltage Threshold: 3.142 V
• Overvoltage Threshold: 3.258 V
• Output Type: Active Low, Push-Pull
• Manual Reset: Not Resettable
• Watchdog: No Watchdog
• Battery Backup Switching: No Backup
• Power-up Reset Delay (typ): 40 ms
• Supply Voltage - Max: 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-23
• Chip Enable Signals: No
• Maximum Power Dissipation: 320 mW
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: No
• Supply Current (typ): 5 uA
• Supply Voltage - Min: 0.7 V

Table 1. Factory-Trimmed Reset Thresholds
When V
operating voltage of 0.7V, push/pull-structured reset
sinking (or sourcing) capabilities decrease drastically.
High-impedance CMOS-logic inputs connected to the
RESET pin can drift to indeterminate voltages. This
does not present a problem in most cases, since most
µPs and circuitry do not operate when V
below 1V. For the MAX6801 application, where RESET
must be valid down to 0V, adding a pulldown resistor
between RESET and GND removes stray leakage cur-
rents, holding RESET low (Figure 2a). The pulldown
resistor value is not critical; 100kΩ is large enough not
THRESHOLD
SUFFIX
RESET
CC
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
falls below 1V and approaches the minimum
Ensuring a Valid Reset Output
_______________________________________________________________________________________
4.714
4.615
4.547
4.419
4.301
4.223
4.124
4.026
3.928
3.830
3.732
3.633
3.535
3.437
3.339
3.241
3.142
3.025
2.946
2.877
2.750
2.651
2.583
MIN
Down to V
T
TYP (V
CC
CC
A
= +25° ° ° ° C
4.80
4.70
4.63
4.50
4.38
4.30
4.20
4.10
4.00
3.90
3.80
3.70
3.60
3.50
3.40
3.30
3.20
3.08
3.00
2.93
2.80
2.70
2.63
drops
= 0V
TH
)
to load RESET and small enough to pull it low. For the
MAX6800 application, where RESET must be valid to
V
V
(Figure 2b).
Since the MAX6802 has an open-drain, active-low out-
put, it typically uses a pullup resistor. With this device,
RESET will most likely not maintain an active condition,
but will drift to a non-active level due to the pullup
resistor and the reduced sinking capability of the open-
drain device. Therefore, this device is not recommend-
ed for applications where the RESET pin is required to
be valid down to V
CC
CC
= 0V, a 100kΩ pullup resistor between RESET and
will hold RESET high when V
4.886
4.785
4.713
4.581
4.459
4.377
4.276
4.174
4.072
3.970
3.868
3.767
3.665
3.563
3.461
3.359
3.258
3.135
3.054
2.983
2.850
2.749
2.677
MAX
µP Reset Circuits
3-Pin, Low-Power
CC
= 0V.
4.656
4.559
4.491
4.365
4.249
4.171
4.074
3.977
3.880
3.783
3.686
3.589
3.492
3.395
3.298
3.201
3.104
2.988
2.910
2.842
2.716
2.619
2.551
MIN
T
A
= -40° ° ° ° C to +125° ° ° ° C
CC
falls below 0.7V
4.944
4.841
4.769
4.635
4.511
4.429
4.326
4.223
4.120
4.017
3.914
3.811
3.708
3.605
3.502
3.399
3.296
3.172
3.090
3.018
2.884
2.781
2.709
MAX
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