DS1232LP Maxim Integrated Products, DS1232LP Datasheet

IC MICRO MONITOR LOW POWER 8-DIP

DS1232LP

Manufacturer Part Number
DS1232LP
Description
IC MICRO MONITOR LOW POWER 8-DIP
Manufacturer
Maxim Integrated Products
Series
MicroMonitor™r
Type
Simple Reset/Power-On Resetr
Datasheet

Specifications of DS1232LP

Number Of Voltages Monitored
1
Output
Open Drain, Push-Pull
Reset
Active High/Active Low
Reset Timeout
Adjustable/Selectable
Voltage - Threshold
4.37V, 4.62V
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
FEATURES
DESCRIPTION
The DS1232LP/LPS Low Power MicroMonitor Chip monitors three vital conditions for a
microprocessor: power supply, software execution, and external over-ride. First, a precision temperature-
compensated reference and comparator circuit monitors the status of V
condition occurs, an internal power-fail signal is generated which forces reset to the active state. When
V
250 ms to allow the power supply and processor to stabilize.
www.dalsemi.com
CC
Super-low power version of DS1232
50 A quiescent current
Halts and restarts an out-of-control
microprocessor
Automatically restarts microprocessor after
power failure
Monitors pushbutton for external override
Accurate 5% or 10% microprocessor power
supply monitoring
8-pin DIP, 8-pin SOIC or space saving -SOP
package available
Optional 16-pin SOIC package available
Industrial temperature -40°C to +85°C
available, designated N
returns to an in-tolerance condition, the reset signals are kept in the active state for a minimum of
1 of 7
Low Power MicroMonitor Chip
PIN ASSIGNMENT
PIN DESCRIPTION
TD
TOL
GND
RST
V
PBRST
ST
PBRST
RST
PBRST
CC
DS1232LP 8-Pin DIP (300-mil)
GND
DS1232LP (118-mil -SOP)
TOL
See Mech. Drawings Section
See Mech. Drawings Section
GND
TD
TOL
TD
1
2
3
4
1
2
3
4
8
7
6
5
8
7
6
5
- Pushbutton Reset Input
- Time Delay Set
- Selects 5% or 10% V
- Ground
- Reset Output (Active High)
- Reset Output (Active Low, open
- Strobe Input
- +5 Volt Power
drain)
V
ST
RST
RST
CC
CC
V
ST
RST
RST
CC
. When an out-of-tolerance
DS1232LP/LPS
PBRST
DS1232LPS 16-Pin SOIC (300-mil)
PBRST
DS1232LPS-2 8-Pin SOIC (150-mil)
GND
TOL
GND
NC
NC
NC
NC
TD
TOL
See Mech. Drawings Section
See Mech. Drawings Section
TD
1
2
3
4
5
6
7
8
1
2
3
4
CC
16
15
14
13
12
11
10
8
7
6
5
9
Detect
111899
VCC
ST
RST
RST
NC
VCC
NC
ST
NC
RST
NC
RST

Related parts for DS1232LP

DS1232LP Summary of contents

Page 1

... Industrial temperature -40°C to +85°C available, designated N DESCRIPTION The DS1232LP/LPS Low Power MicroMonitor Chip monitors three vital conditions for a microprocessor: power supply, software execution, and external over-ride. First, a precision temperature- compensated reference and comparator circuit monitors the status of V condition occurs, an internal power-fail signal is generated which forces reset to the active state. When ...

Page 2

... The third function is a watchdog timer. The DS1232LP/LPS has an internal timer that forces the reset signals to the active state if the strobe input is not driven low prior to timeout. The watchdog timer function can be set to operate on timeout settings of approximately 150 ms, 600 ms, and 1 ...

Page 3

... MICROMONITOR BLOCK DIAGRAM PUSHBUTTON RESET Figure 1 WATCHDOG TIMER Figure DS1232LP/LPS ...

Page 4

... TIMING DIAGRAM: PUSHBUTTON RESET Figure 3 TIMING DIAGRAM: STROBE INPUT Figure 4 WATCHDOG TIME-OUTS Table 1 TD GND Float V CC TIME-OUT MIN TYP 62.5 ms 150 ms 250 ms 600 ms 500 ms 1200 DS1232LP/LPS MAX 250 ms 1000 ms 2000 ms ...

Page 5

... TIMING DIAGRAM: POWER-DOWN Figure 5 TIMING DIAGRAM: POWER-UP Figure DS1232LP/LPS ...

Page 6

... SYMBOL MIN TYP V 4 SYMBOL MIN TYP -0.5V -0.1V I CC1 I 200 CC2 V 4.50 4.62 CCTP V 4.25 4.37 CCTP SYMBOL MIN TYP OUT DS1232LP/LPS + 0. MAX UNITS NOTES =4.5 to 5.5V) CC MAX UNITS NOTES +1 0 500 MAX UNITS NOTES ...

Page 7

... Inactive RPU PDLY and within 0.5V of supply rails. ST PBRST with an internal impedance of 40k typical power-down until V CC drops below 2.0V. CC and at TTL levels. ST PBRST DS1232LP/LPS ( =5V CC TYP MAX UNITS ms 610 1000 175 s s 610 1000 drops below 2.0V. remains within ...

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