MAX834EUK+T Maxim Integrated Products, MAX834EUK+T Datasheet - Page 7

• Manufacturer Part Number: MAX834EUK+T
• Description: IC MONITOR VOLT LATCH SOT23-5
• Manufacturer: Maxim Integrated Products
• Type: Simple Reset/Power-On Resetr

Specifications of MAX834EUK+T

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: 80 µs Typical Propagation Delay
• Voltage - Threshold: Adjustable/Selectable
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Undervoltage Threshold: 1.185 V
• Overvoltage Threshold: 1.215 V
• Manual Reset: No
• Watchdog: No
• Supply Voltage (max): 11 V
• Supply Voltage (min): 2.5 V
• Supply Current (typ): 5 uA
• Maximum Power Dissipation: 571 mW
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MAX834EUK+T; MAX834EUK+TTR

Figure 4. Monitoring Voltages Other than V
Figure 5. Load-Disconnect Switch
V
*MAX834 ONLY
BATT
V
CC
V
CC
R1
CLEAR
LATCH
LATCH
CLEAR
0.1μF
0.1μF
_______________________________________________________________________________________
GND
V
CLEAR
CC
Micropower, Latching Voltage Monitors
GND
V
CLEAR
MAX835
CC
MAX834
MAX835
V
(UNITS ARE OHMS AND VOLTS)
OUT
TRIP
IN
OUT
= (1.204)
IN
R1 + R2
1MΩ
Q2
R2
V
CC
R2
CC
Q1
R
L
*
OUT
P
N
V
MON
R
R1
R2
LOAD
The Typical Operating Circuit for the MAX834/MAX835
monitors V
monitored, as shown in Figure 4. Calculate V
the Programming the Trip Voltage (V
When monitoring voltages other than V
the maximum value for V
The circuit in Figure 5 is designed to prevent a lead-
acid battery or a secondary battery such as an NiCd,
from sustaining damage through deep discharge. As
the battery reaches critical undervoltage, OUT switches
low. Q1 and Q2 turn off, disconnecting the battery from
the load. The MAX835’s latched output prevents Q1
and Q2 from turning on again as the battery voltage
relaxes to its open-circuit voltage when the load dis-
connects. CLEAR can be connected to a pushbutton
switch, an RC network, or a logic gate to reset the latch
when the battery is recharged or replaced.
Monitoring Voltages Other than V
V
MON(MAX)
CC
. Voltages other than V
= (V
Load-Disconnect Switch
MON
CC
- 1) (R1 + R2) / R2
in SOT23-5
is not exceeded:
CC
CC
TRIP
can easily be
, ensure that
) section.
TRIP
as in
CC
7