STM1066 Datasheet, PDF (8/20 Pages) STMicroelectronics – Smart voltage supervisor

Operation
2
Operation
STM1066
The STM1066 connects or disconnects the output OUT, from the V_IN pin based on the
logical combination of the enable input (EN), the inhibit input (INH), and the supply voltage
level, V_CC (see Table 2 or Figure 11 for more details).
2.1
Output, OUT
If the enable input is in a logic high state and inhibit input is in a logic low state, the output
will be connected to V_IN input as V_CC rises above the V_TH+ voltage threshold. Otherwise, the
output is connected to ground GND. The output is current limited (see Table 5).
2.2
Enable input, EN
A Logic low on the enable input disconnects the output from V_IN and disables the device,
which enters a standby mode with very low current consumption (see Table 5).
2.3
Inhibit input, INH
A logic high on the inhibit input disconnects the output from V_IN.
Table 2. Truth table
V_CC
EN⁽¹⁾
INH
OUT
<V_TH+ (rising edge)
x
<V_TH- (falling edge)
x
L
x
connected to GND
x
connected to GND
x
x
H
connected to GND
>V_TH+ (rising edge)
H
>V_TH- (falling edge)
L
connected to V_IN
1. Once the device is disabled by EN input, the V_CC must be above V_TH+ to reconnect output to V_IN.
8/20