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DS1830

P1-P3P4-P6P7-P7
D1830/A
4 of 7
APPLICATION DIAGRAM — CASCADE DELAY CONFIGURATIONS Figure 4
Note 1: The RST3 output tied to the pushbutton reset would be pulled to V
CC
through the 40kW resistor in
the pushbutton input. If a stronger pull-up is required an additional pull-up resistor could be added.
Note 2: When using the cascade configuration, it is important that the TOL pins of the master and the
slave are configured so that the master’s V
CCTP
is greater than the slave’s V
CCTP
. This will ensure that
when the master’s higher V
CCTP
is crossed, the resets will ripple through to the slave.
TIMING DIAGRAM — POWER-DOWN Figure 5
MASTER
SLAVE
SEE NOTE 2
SEE NOTE 2
SEE NOTE 1
D1830/A
5 of 7
TIMING DIAGRAM — POWER-UP Figure 6
ABSOLUTE MAXIMUM RATINGS*
Voltage on any Pin
Relative to
Ground
-0.5V to +6.0V
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 NOTES
Supply Voltage
V
CC
1.0 5.5 V 1
PBRST Input High
Level
V
IH
2.0
V
CC
+ 0.3
V
PBRST Input Low
Level
V
IL
-0.3 +0.5 V
D1830/A
6 of 7
DC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; V
CC
= 1.0V to 5.5V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
V
CC
Trip Point (TOL=
V
CC
) DS1830
V
CCTP
4.50 4.62 4.74 V
V
CC
Trip Point
(TOL=GND) DS1830
V
CCTP
4.25 4.37 4.49 V
V
CC
Trip Point
(TOL=Open) DS1830
V
CCTP
4.00 4.13 4.24
V
V
CC
Trip Point (TOL=
V
CC
) DS1830A
V
CCTP
2.98 3.06 3.15 V
V
CC
Trip Point
(TOL=GND) DS1830A
V
CCTP
2.80 2.88 2.97 V
V
CC
Trip Point
(TOL=Open) DS1830A
V
CCTP
2.47 2.55 2.64 V
Input Leakage
I
IL
-1.0 +1.0 µA2
Output Current @ 0.4V
I
OL
20 mA 3
DS1830
18 35
Operating Current
(Standby)
I
CC
DS1830A
10 25
µA4
AC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; V
CC
= 1.0V to 5.5V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
PBRST = V
IL
t
PB
t
PDLY
ms
RESET Active Time
( RST1 /TD =GND)
t
RST1
10 15 20 ms
RESET Active Time
( RST1 /TD =Float)
t
RST1
20 30 40 ms
RESET Active Time
( RST1 /TD = V
CC
)
t
RST1
50 75 100 ms
RESET Active Time
(
RST2 )
t
RST2
5x
t
RST
1
ms
RESET Active Time
(
RST3 )
t
RST3
10x
t
RST
1
ms
V
CC
Detect to RST t
RPD
58µs5
V
CC
Slew Rate t
F
20 µs6
V
CC
Detect to RST t
RPU
See RESET Active
Times
ms 7
V
CC
Slew Rate t
R
0ns
PBRST Stable Low to
RST
t
PDLY
1.0 1.5 2.0 ms
CAPACITANCE (TA = +25°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Capacitance
C
IN
5pF
Output Capacitance
C
OUT
7pF
P1-P3P4-P6P7-P7

DS1830

Mfr. #:
Buy DS1830
Manufacturer:
Maxim Integrated
Description:
Supervisory Circuits Reset Sequencer
Lifecycle:
New from this manufacturer.
Delivery:
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