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PDF DS1830 Data sheet ( Hoja de datos )
| Número de pieza | DS1830 | |
| Descripción | Reset Sequence Pushbutton | |
| Fabricantes | Dallas Semiconductor | |
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FEATURES
§ 5V (DS1830) or 3.3V (DS1830A) power-on
reset
§ Excellent for systems that need power-on
resets in a consistent sequence
§ Asserts resets during power transients
§ Pushbutton reset input for system override
§ Selectable reset timing
§ Reduces need for discrete components
§ Precision temperature-compensated voltage
reference
§ 8-pin DIP, 8-pin SO, or space saving 8-pin
µSOP
§ Operating temperature of -40°C to +85°C
§ Open-drain, active-low inputs
DS1830/A DS183
DS1830/A
Reset Sequence Pushbutton
PIN ASSIGNMENT
PIN DESCRIPTION
1 PBRST
- Pushbutton Reset Input
2 TD
- Time Delay Select Input
3 TOL
4 GND
- VCC Tolerance Select Input
- Ground
8 VCC
7 RST1
- Power Supply
- Reset 1 Output
6 RST2
- Reset 2 Output
5 RST3
- Reset 3 Output
DESCRIPTION
The DS1830 Reset Sequencer monitors the power supply for an in-tolerance condition and the pushbutton
reset input for a manual reset. First a precision temperature-compensated reference and comparator circuit
monitors the status of the power supply and when an out-of-tolerance condition is detected, an internal
power fail signal is generated that forces the reset lines to go to an active state. If the power supply
returns to an in-tolerance condition, RST1 will release followed by RST2 and finally RST3 . Sequencing of
resets allows for systems to power-up in an orderly manner providing superior reliability.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any
device may be simultaneously available through various sales channels. For information about device errata, click here: http://dbserv.maxim-
ic.com/errata.cfm.
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060303
1 page  
TIMING DIAGRAM — POWER-UP Figure 6
www.DataSheet4U.com
D1830/A
ABSOLUTE MAXIMUM RATINGS*
Voltage on any Pin Relative to
-0.5V to +6.0V
Ground
Operating Temperature
-40°C to +85°C
Storage Temperature
-55°C to +125°C
Soldering Temperature
See IPC/JEDEC J-STD-020A
* This is a stress rating only and functional operation of the device at these or any other conditions above
those indicated in the operation sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS (-40°C to +85°C)
PARAMETER
SYMBOL
MIN TYP
MAX UNITS
Supply Voltage
VCC 1.0
5.5 V
PBRST Input High
Level
VIH
2.0
VCC + 0.3
V
PBRST Input Low
Level
VIL -0.3
+0.5 V
NOTES
1
5 of 7
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet DS1830.PDF ] | |
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