Datasheet

MAX9940
Signal-Line Overvoltage Protector
for Low-Voltage Devices
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
(All voltages with respect to GND.)
V
CC
...........................................................................-0.3V to +6V
INT ............................................................................-0.3V to +6V
EXT .........................................................................-0.3V to +30V
Continuous Input Current into Any Terminal.....................±20mA
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SC70 (derate 3.1mW/°C above +70°C)..............245mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY
Power-Supply Voltage V
CC
2.2 5.5 V
Quiescent Supply Current I
CC
V
INT
= 0 13 21 µA
DC CHARACTERISTICS
INT Voltage Range V
INT
0 5.5 V
EXT Voltage Range V
EXT
(Note 2) -0.7 +28 V
EXT Rising Threshold V
THR
V
CC
+
0.19
V
CC
+
0.26
V
CC
+
0.30
V
EXT Falling Threshold V
THF
V
CC
+
0.09
V
CC
+
0.13
V
CC
+
0.16
V
SWITCH CHARACTERISTICS
On-Resistance R
ON
0 < V
EXT
< V
CC
, I
EXT
= ±10mA 43.5 77.5 Ω
On-Capacitance C
ON
Capacitance to GND 38 pF
INT Off-Capacitance C
OFF
Capacitance to GND 27 pF
INT Normal Operation Leakage
Current (to GND)
0 < V
INT
< V
CC
, V
CC
= 5.5V 3 4.2 µA
EXT Normal Operation Leakage
Current (to GND)
0 < V
EXT
< V
CC
, V
CC
= 5.5V 3 5 µA
INT Fault Leakage Current V
INT
= 3.3V, V
EXT
= 28V 2 10 nA
EXT Fault Leakage Current V
INT
= 3.3V, V
EXT
= 28V 341 510 µA
V
CC
= V
DD
= 0, 2.2V < V
DD
< 5.5V,
R
INT_PULLUP
= 2kΩ to V
DD
38 70 µA
INT Shutdown Leakage Current
(to GND)
V
CC
= V
DD
= 0 1 nA
AC CHARACTERISTICS
Power-Up Delay Time t
PUP
500 µs
Fault, V
EXT
= 10V, R
INT_PULLUP
= 200Ω 98 200
Fault Reaction Time t
OFF
Fault, V
EXT
= 16V, R
INT_PULLUP
= 200Ω 60
ns
Fault Recovery Time t
ON
Fault removed, V
EXT
< V
CC
- 0.8V 271 375 ns
Note 1: All devices are 100% production tested at T
A
= +25°C. Specifications over temperature limits are guaranteed by design.
Note 2: Minimum EXT voltage of -0.7V is allowed only with a maximum drawn current of 20mA.
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.3V, R
INT_PULLUP
= 2kΩ to V
DD
, V
DD
= 3.3V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)