MAX6337US25D3-T Maxim Integrated, MAX6337US25D3-T Datasheet - Page 5

• Manufacturer Part Number: MAX6337US25D3-T
• Description: Supervisory Circuits
• Manufacturer: Maxim Integrated
• Series: MAX6335, MAX6336, MAX6337r

Specifications of MAX6337US25D3-T

• Number Of Voltages Monitored: 1
• Monitored Voltage: 1.8 V, 2.5 V
• Undervoltage Threshold: 2.46 V
• Overvoltage Threshold: 2.55 V
• Output Type: Active Low, Open Drain
• Manual Reset: Resettable
• Watchdog: No Watchdog
• Battery Backup Switching: No Backup
• Power-up Reset Delay (typ): 200 ms
• Supply Voltage - Max: 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-143
• Chip Enable Signals: No
• Maximum Power Dissipation: 320 mW
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: No
• Supply Current (typ): 3.3 uA
• Supply Voltage - Min: 1.2 V

Figure 2. Ensuring Reset Valid down to V
(Figure 2a). The pull-down resistor value is not critical;
100kΩ is large enough not to load RESET, and small
enough to pull it low. For the MAX6335, where RESET
must be valid to V
between RESET and V
V
Since the MAX6337 has an open-drain, active-low out-
put, it typically uses a pull-up resistor. With this device,
RESET will most likely not maintain an active condition,
but will drift to a non-active level due to the pull-up
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
falls below 0.7V (Figure 2b).
*ASSUMES HIGH-Z RESET INPUT TO THE µP
(a)
(b)
_______________________________________________________________________________________
CC
CC
MR
MR
= 0.
MAX6336
MAX6335
CC
= 0, a 100kΩ pull-up resistor
GND
GND
V
V
µP Reset Circuits with Manual Reset
4-Pin, Ultra-Low-Voltage, Low-Power
CC
CC
will hold RESET high when
RESET
RESET
CC
= 0
100k
100k*
Table 1. Factory-Trimmed Reset
Thresholds*
* Factory-trimmed reset thresholds are available in approximately
100mV increments, with a ±1.8% room-temperature variance.
MAX633_US25D_
MAX633_US24D_
MAX633_US23D_
MAX633_US22D_
MAX633_US21D_
MAX633_US20D_
MAX633_US19D_
MAX633_US18D_
MAX633_US17D_
MAX633_US16D_
THRESHOLD
SUFFIX
RESET
MIN TYP MAX
2.46 2.50
2.36 2.40
2.26 2.30
2.16 2.20
2.06 2.10
1.96 2.00 2.04
1.87 1.90
1.77 1.80 1.83
1.67 1.70 1.73
1.57 1.60
T
A
= +25°C
2.55
2.44
2.34
2.24
2.14
1.93
1.63
T
MIN
A
2.43
2.33
2.23
2.13
2.04
1.94
1.84
1.75
1.65
1.55
= -40°C to +125°C
MAX
2.58
2.47
2.37
2.27
2.16
2.06
1.96
1.85
1.75
1.65
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