14

input IN, then only one transistor will be conducting, and no lateral current flows through the circuit. With input levels

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

00.5

1

1.5

22.5

33.5

4

4.5

5

voltage at CONTROL-input [V]

Figure 11.

The typical current consumption of a TLC770X is only 10

µA, whereas the lateral current can be about 100x higher.

With some applications (see Section 5, Figure 21.) undefined levels may exists at the CONTROL input. In order to

prevent the CONTROL input from causing an increase of current consumption, it is inhibited as a result of internal

circuitry if the

RESET

Output

−

is active; that is, when a Low level is applied to the input

RESIN , or the voltage at

In the quiescent state, the input

RESIN must be at a High level, and the input CONTROL at Low.

), the device can not

operate, and in this situation it is not possible to say what the voltage level at the output will be. Although with this

order of voltage no definite function can be expected from the circuit being monitored, this does not mean any

restriction in practice. With a supply voltage above 1 V there will be a Low level at the

RESET output, provided the

input conditions are fulfilled. With a supply voltage of more than 2 V, all parts of the circuit in the TLC770X operate

as specified in the Data Sheet.

In order that the circuit may recognize voltage reductions at the SENSE input, these voltages must be applied for a

certain time period. This time depends on the magnitude of the voltage reductions: the greater these are, the shorter

is the time period needed to start the RESET procedure. Figure 12. shows this relationship.