MAX6748 MAXIM [Maxim Integrated Products], MAX6748 Datasheet - Page 2

• Manufacturer Part Number: MAX6748
• Description: uP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay
• Manufacturer: MAXIM [Maxim Integrated Products]

ABSOLUTE MAXIMUM RATINGS
V
SRT, SWT, SET0, SET1, RESET IN, WDS, MR,
RESET (Push-Pull) to GND......................…-0.3V to (V
RESET (Open Drain) to GND .............................…-0.3V to +6.0V
Input Current (All Pins) .....................................................±20mA
Output Current (RESET) ...................................................±20mA
µP Reset Circuits with Capacitor-Adjustable
Reset/Watchdog Timeout Delay
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
2
Supply Voltage
Supply Current
V
Hysteresis
V
Reset Timeout Period
SRT Ramp Current
SRT Ramp Threshold
Normal Watchdog Timeout Period
(MAX6746–MAX6751)
Extended Watchdog Timeout
(MAX6746–MAX6751)
Slow Watchdog Period
(MAX6752/MAX6753)
Fast Watchdog Timeout Period,
SET Ratio = 8,
(MAX6752/MAX6753)
Fast Watchdog Timeout Period,
SET Ratio = 16,
(MAX6752/MAX6753)
CC
CC
WDI, to GND .......................................…-0.3V to (V
CC
CC
_______________________________________________________________________________________
to GND ...........................................................-0.3V to +6.0V
= +1.2V to +5.5V, T
Reset Threshold
to Reset Delay
PARAMETER
A
= T
MIN
to T
SYMBOL
MAX
V
V
I
RAMP
t
t
t
V
V
RAMP
t
t
WD2
WD1
WD1
I
HYST
t
WD
WD
CC
RP
CC
TH
, unless otherwise specified. Typical values are at V
T
T
V
V
V
See V
selection table
V
100mV at 1mV/µs
C
C
V
C
C
C
C
C
C
C
C
C
C
V
A
A
CC
CC
CC
CC
SRT
SRT
SRT
SWT
SWT
SWT
SWT
SWT
SWT
SWT
SWT
SWT
SWT
CC
CC
CC
= 0°C to +125°C
= -40°C to 0°C
≤ 5.5V
≤ 3.3V
≤ 2.0V
falling from V
= 0 to 1.23V; V
= 1.6V to 5V (V
TH
= 1500pF
= 100pF
+ 0.3V)
+ 0.3V)
= 1500pF
= 100pF
= 1500pF
= 100pF
= 1500pF
= 100pF
= 1500pF
= 100pF
= 1500pF
= 100pF
CONDITIONS
T A = -40°C to+125°C
TH
Continuous Power Dissipation (T
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range ............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
CC
RAMP
+ 100mV to V
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
= 1.6V to 5V
rising)
TH
-
CC
5.692
1.173
5.692
728.6
728.6
91.08
45.53
V
= +5V and T
MIN
200
1.0
1.2
2%
TH
-
A
= +70°C)
121.43
7.590
0.506
1.235
7.590
0.506
971.5
64.77
971.5
64.77
60.71
TYP
8.09
4.05
250
4.2
3.7
0.8
20
5
A
= +25°C.) (Note 1)
1214.4
1214.4
151.80
V
9.487
1.297
9.487
75.89
MAX
300
5.5
5.5
TH
2%
10
9
8
+
UNITS
ms
ms
ms
ms
ms
ms
µA
nA
µs
%
V
V
V