MAX1232MJA/883B Maxim Integrated Products, MAX1232MJA/883B Datasheet - Page 3

• Manufacturer Part Number: MAX1232MJA/883B
• Description: Supervisory Circuits MPU Monitor
• Manufacturer: Maxim Integrated Products

Specifications of MAX1232MJA/883B

• Number Of Voltages Monitored: 1
• Monitored Voltage: 4.5 V, 4.75 V
• Undervoltage Threshold: 4.5 V, 4.25 V
• Overvoltage Threshold: 4.49 V, 4.74 V
• Output Type: Active High, Active Low, Open Drain
• Manual Reset: Resettable
• Watchdog: Watchdog
• Battery Backup Switching: No Backup
• Power-up Reset Delay (typ): 1000 ms
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Supply Current (typ): 200 uA
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• Package / Case: CDIP-8
• Minimum Operating Temperature: - 55 C
• Power Fail Detection: No
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

AC Electrical Characteristics
(V
Note 1: PBRST is internally pulled up to V
Note 2: Measured with outputs open.
Note 3: All voltages referenced to GND.
Note 4: Guaranteed by desing.
Note 5: PBRST must be held low for a minimum of 20ms to guarantee a reset.
Note 6: t
PBRST (Note 5)
PBRST Delay
Reset Active Time
ST Pulse Width
ST Timeout Period
V
V
V
Low
V
Open (Note 6)
1, 3, 5, 7, 10,
CC
CC
CC
CC
CC
WIDE SO
12, 14, 16
= +5V ±10%, T
Fall Time (Note 4)
Rise Time (Note 4)
Detect to RST High and RST
Detect to RST Low and RST
11
13
15
2
4
6
8
9
R
PARAMETER
= 5µs.
PIN
DIP/SO
A
_______________________________________________________________________________________
—
1
2
3
4
5
6
7
8
= T
MIN
to T
PBRST
NAME
MAX
GND
N.C.
TOL
V
RST
RST
TD
ST
CC
SYMBOL
)
t
t
t
t
t
PBD
t
BPD
BPU
RST
t
PB
TD
t
t
ST
B
F
CC
No Connection
Pushbutton Reset Input. A debounced active-low input that ignores pulses less than 1ms
in duration and is guaranteed to recognize inputs of 20ms or greater.
Time Delay Set. The watchdog timebase select input (t
Tolerance Input. Connect to GND for 5% tolerance or to V
Ground
Reset Output (Active High). Goes active:
(1) If VCC falls below the selected reset voltage threshold
(2) If PBRST is forced low
(3) If ST is not strobed within the minimum timeout period
(4) During power-up
Reset Output (Active Low, Open-Drain). See RST.
Strobe Input. Input for watchdog timer.
The +5V Power-Supply Input
600ms for TD = open, t
with an internal impedance of typically 40kΩ.
Figure 3
Figure 3
Figure 4
Figure 4, TD pin = 0V
TD pin = open
TD pin = V
Figure 5
Figure 6
Figure 7, V
Figure 8, V
CC
CC
CC
falling
rising
CONDITIONS
TD
Microprocessor Monitor
= 1.2s for TD = V
FUNCTION
CC
).
MIN
62.5
250
250
500
250
TD
20
75
10
1
0
CC
= 150ms for TD = 0V, t
for 10% tolerance.
Pin Description
1200
TYP
610
150
600
610
4
MAX
1000
1000
2000
1000
250
100
20
TD
UNITS
=
ms
ms
ms
ms
ms
ns
µs
µs
ns
3