MAX16997AAUA+ Maxim Integrated Products, MAX16997AAUA+ Datasheet - Page 3

• Manufacturer Part Number: MAX16997AAUA+
• Description: IC TIMER WATCHDOG 8-UMAX
• Manufacturer: Maxim Integrated Products
• Type: Watchdog Circuitr

Specifications of MAX16997AAUA+

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: Adjustable/Selectable
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (continued)
(V
Note 2: R
Note 3: Calculated based on V
Note 4: WDI pulses narrower than 1µs will be ignored. WDI pulses wider than 6.5µs will be recognized.
Note 5: Not production tested, guaranteed by design.
(C
WATCHDOG TIMER
WDI Input Threshold
WDI Input Hysteresis
WDI Minimum Pulse Width
WDI Input Current
Minimum Watchdog Timeout
Watchdog Timeout Period
Maximum Watchdog Timeout
Watchdog Window
WDI to ENABLE Output Delay
RESET Pullup Resistor Supply
Voltage
ENABLE Pullup Resistor Supply
Voltage
IN
10,000
SWT
1000
100
= 14V, T
0.1
10
1
0.1
= C
voltage. Connect R
I
RAMP
RESET
PARAMETER
SRT
A
= 500nA
RESET TIMEOUT PERIOD
= T
= 1500pF, T
1
and R
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
vs. C
_______________________________________________________________________________________
C
SRT
ENABLE
10
(nF)
SRT
A
RESET
= +25°C, unless otherwise noted.)
are external pullup resistors for open-drain outputs. Connect R
RAMP
100
High-Voltage Watchdog Timers with
to a maximum voltage of 18V and connect R
= 1.235V and I
SYMBOL
WDI
t
t
t
1000
WDImin
WPmax
WPmin
D
I
t
V
V
WDI
WP
WDI
HYST
IH
IL
10,000
1000
100
(Note 4)
WDI = 0 or 14V
C
C
C
MAX16998B
MAX16998D
Start from WDI third wrong trigger
(Note 5)
(Note 5)
10
1
SWT
SWT
SWT
RAMP
0.1
I
RAMP
= 680pF (Note 3)
= 1200pF (Note 3)
= 22nF
WATCHDOG TIMEOUT PERIOD
= 500nA.
= 500nA
1
Adjustable Timeout Delay
CONDITIONS
vs. C
C
SWT
10
(nF)
SWT
Typical Operating Characteristics
100
ENABLE
1000
A
to a maximum voltage of 28V.
= +25°C.) (Note 2)
RESET
26
24
22
20
18
16
14
12
10
2.25
67.5
2.25
2.25
MIN
6.5
0
45
and R
RESET AND ENABLE NOT
ASSERTED
10
ENABLE
217.36
vs. SUPPLY VOLTAGE
TYP
SUPPLY CURRENT
200
100
0.1
6.8
2.5
2.5
SUPPLY VOLTAGE (V)
12
50
75
20
to a minimum 2.5V
18.00
28.00
MAX
82.5
0.9
55
30
40
UNITS
%t
mV
ms
ms
ms
µA
µs
µs
V
V
V
WP
50
3