MAX823YEXK-T Maxim Integrated, MAX823YEXK-T Datasheet - Page 6
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MAX823YEXK-T
Manufacturer Part Number
MAX823YEXK-T
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
MAX823, MAX823L, MAX823M, MAX823R, MAX823S, MAX823T, MAX823Y, MAX823Z, MAX824, MAX824L, MAX824M, MAX824R, MAX824S, MAX824T, MAX824Y, MAX824Z, MAX825, MAX825L, MAX825M, MAX825R, MAX825S, MAX825T, MAX825Y, MAX825Zr
Datasheet
1.MAX824ZEXK-T.pdf
(10 pages)
Specifications of MAX823YEXK-T
Number Of Voltages Monitored
1
Monitored Voltage
2.5 V, 3 V, 3.3 V, 5 V
Undervoltage Threshold
2.16 V
Overvoltage Threshold
2.22 V
Output Type
Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
280 ms
Supply Voltage - Max
5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SC-70
Chip Enable Signals
No
Maximum Power Dissipation
247 mW
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Supply Current (typ)
4 uA
Supply Voltage - Min
1.2 V
5-Pin Microprocessor Supervisory Circuits With
Watchdog Timer and Manual Reset
Figure 1. Functional Diagram
6
MAX823
_______________________________________________________________________________________
—
1
2
3
4
5
(MAX823/MAX825
(MAX823/MAX824
MAX824
PIN
ONLY)
ONLY)
—
1
2
3
4
5
V
WDI
MR
CC
MAX825
—
1
2
4
3
5
V
CC
NAME
RESET
RESET
GND
WDI
V
MR
CC
WATCHDOG
TRANSITION
DETECTOR
Active-Low Reset Output. Pulses low for 200ms when triggered, and remains
low whenever V
remains low for 200ms after one of the following occurs: V
reset threshold, the watchdog triggers a reset, or MR goes low to high.
Ground
Manual Reset Input. A logic low on MR asserts reset. Reset remains asserted as
long as MR is held low and for 200ms after MR returns high. The active-low input
has an internal 52kΩ pullup resistor. It can be driven from a CMOS logic line or
shorted to ground with a switch. Leave open or connect to V
Active-High Reset Output. Inverse of RESET.
Watchdog Input. If WDI remains either high or low for longer than the watch-
dog timeout period, the internal watchdog timer runs out and a reset is trig-
gered. The internal watchdog timer clears whenever reset is asserted, or
whenever WDI sees a rising or falling edge. If WDI is left unconnected or is
connected to a three-stated buffer output, the watchdog feature is disabled.
Supply Voltage
1.25V
CC
GND
is below the reset threshold or when MR is a logic low. It
GENERATOR
WATCHDOG
RESET
TIMER
FUNCTION
MAX823
MAX824
MAX825
Pin Description
RESET
RESET
(MAX824/MAX825
ONLY)
CC
CC
rises above the
if unused.