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DS1232 参数 Datasheet PDF下载

DS1232图片预览
型号: DS1232
PDF下载: 下载PDF文件 查看货源
内容描述: MicroMonitor芯片 [MicroMonitor Chip]
分类和应用:
文件页数/大小: 7 页 / 99 K
品牌: DALLAS [ DALLAS SEMICONDUCTOR ]
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DS1232
MicroMonitor Chip
www.dalsemi.com
FEATURES
Halts and restarts an out-of-control
microprocessor
Holds microprocessor in check during power
transients
Automatically restarts microprocessor after
power failure
Monitors pushbutton for external override
Accurate 5% or 10% microprocessor power
supply monitoring
Eliminates the need for discrete components
Space-saving, 8-pin mini-DIP
Optional 16-pin SOIC surface mount package
Industrial temperature -40°C to +85°C
available, designated N
PIN ASSIGNMENT
PBRST
TD
TOL
GND
1
2
3
4
8
7
6
5
VCC
ST
RST
RST
DS1232 8-Pin DIP (300-mil)
See Mech. Drawings Section
NC
PBRST
NC
TD
NC
TOL
NC
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
VCC
NC
ST
NC
RST
NC
RST
DS1232S 16-Pin SOIC (300-mil)
See Mech. Drawings Section
PIN DESCRIPTION
PBRST
TD
TOL
GND
RST
RST
ST
V
CC
NC
- Pushbutton Reset Input
- Time Delay Set
- Selects 5% or 10% V
CC
Detect
- Ground
- Reset Output (Active High)
- Reset Output (Active Low, open
drain)
- Strobe Input
- +5 Volt Power
- No Connections
DESCRIPTION
The DS1232 MicroMonitor Chip monitors three vital conditions for a microprocessor: power supply,
software execution, and external override. First, a precision temperature-compensated reference and
comparator circuit monitors the status of V
CC
. When an out-of-tolerance condition occurs, an internal
power fail signal is generated which forces reset to the active state. When V
CC
returns to an in-tolerance
condition, the reset signals are kept in the active state for a minimum of 250 ms to allow the power supply
and processor to stabilize.
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