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PDF MAX834EUK-T Data sheet ( Hoja de datos )
| Número de pieza | MAX834EUK-T | |
| Descripción | Micropower / Latching Voltage Monitors in SOT23-5 | |
| Fabricantes | Maxim Integrated | |
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19-1157; Rev 0; 12/96
Micropower, Latching Voltage Monitors
in SOT23-5
_______________General Description
The MAX834/MAX835 micropower voltage monitors
contain a 1.204V precision bandgap reference, com-
parator, and latched output in a 5-pin SOT23 package.
Using the latched output prevents deep discharge of
batteries. The MAX834 has an open-drain, N-channel
output driver, while the MAX835 has a push/pull output
driver. Two external resistors set the trip-threshold
voltage.
The MAX834/MAX835 feature a level-sensitive latch,
eliminating the need to add hysteresis to prevent oscil-
lations in battery-load-disconnect applications.
____________________________Features
o Prevents Deep Discharge of Batteries
o Precision ±1.25% Voltage Threshold
o Latched Output (once low, stays low
until cleared)
o SOT23-5 Package
o Low Cost
o Wide Operating Voltage Range, +2.5V to +11V
o <2µA Typical Supply Current
o Open-Drain Output (MAX834)
Push/Pull Output (MAX835)
________________________Applications
Precision Battery Monitor
Load Switching
Battery-Powered Systems
Threshold Detectors
______________Ordering Information
PART
MAX834EUK-T
MAX835EUK-T
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
5 SOT23-5
5 SOT23-5
SOT
TOP MARK
AAAX
AAAY
__________Typical Operating Circuit
CLEAR LATCH
VCC
CLEAR
OUT
MAX834
MAX835
GND
VCC
(MAX834
RL ONLY)
OUT
VCC IN
0.1µF
R1
R2
__________________Pin Configuration
TOP VIEW
CLEAR 1
5 OUT
MAX834
GND 2 MAX835
VCC 3
4 IN
SOT23-5
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
1 page  
Micropower, Latching Voltage Monitors
in SOT23-5
_____________________________Typical Operating Characteristics (continued)
(VCC = +5V, Typical Operating Circuit, TA = +25°C, unless otherwise noted.)
OUTPUT LOW VOLTAGE
vs. OUTPUT SINK CURRENT
10k
VCC = 3.6V
1k TA = +85°C
MAX835
OUTPUT HIGH VOLTAGE
vs. OUTPUT SOURCE CURRENT
10k
VCC = 3.6V
1k TA = +85°C
CLEAR TO OUT PROPAGATION DELAY
vs. TEMPERATURE
1.5
VIN > VTH
1.3
1.1 VCC = 3.6V
100
TA = -40°C
100
TA = +25°C
10
10
TA = -40°C
TA = +25°C
1
0.1
1 10
OUTPUT SINK CURRENT (mA)
100
1
0.1
1
OUTPUT SOURCE CURRENT (mA)
10
0.9
0.7 VCC = 5.0V
0.5
0.3 VCC = 11.0V
0.1
-60 -40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
______________________________________________________________Pin Description
PIN NAME
FUNCTION
1
CLEAR
Clear Input resets the latched output. With VIN > VTH, pulse CLEAR high for a minimum of 1µs to reset the
output latch. Connect to VCC to make the latch transparent.
2 GND System Ground
3 VCC System Supply Input
4 IN Noninverting Input to the Comparator. The inverting input connects to the internal 1.204V bandgap reference.
5
OUT
Open-Drain (MAX834) or Push/Pull (MAX835) Latched Output. OUT is active low.
CLEAR
GND
MAX834
MAX835
1.204V
VCC
LATCH
OUT
IN
CLEAR
LATCH
VCC
CLEAR
OUT
GND IN
VCC
MAX834
MAX835
VCC
RL (MAX834 ONLY)
OUT
R1
0.1µF
( )VTRIP = (1.204)
R1 + R2
R2
(UNITS ARE OHMS AND VOLTS)
R2
Figure 1. Functional Diagram
Figure 2. Programming the Trip Voltage (VTRIP)
_______________________________________________________________________________________ 5
5 Page | ||
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| PDF Descargar | [ Datasheet MAX834EUK-T.PDF ] | |
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