stm1403ctoq6f STMicroelectronics, stm1403ctoq6f Datasheet - Page 11

• Manufacturer Part Number: stm1403ctoq6f
• Description: 3v Fips-140 Security Supervisor With Battery Switchover
• Manufacturer: STMicroelectronics

Pin descriptions
SAL, Security alarm output (open drain)
Note:
TP
TP
Vccsw, V
1
2
, TP
, TP
1
2
3
4
CC
See
connected to this device.
This signal can be generated when ANY of the following conditions occur:
●
●
●
The default state of the SAL output during initial power-up is undetermined.
The alarm function will operate either with V
from V
Physical Tamper Detect Pin set normally to High (NH). They are connected externally
through a closed switch or a high-impedance resistor to V
V
pulled low (see
V
Physical Tamper Detect Pin set normally to Low (NL). They are connected externally
through a high-impedance resistor or a closed switch to V
detected when the input pin is pulled high (see
to V
This output is low when V
in this mode it may be used to turn on an external p-channel MOSFET switch which can
source an external device directly from V
STM1403).
This pin goes high when V
ON” indicator.
If a Security Alarm (SAL) is issued on Tamper, then the state of the Vccsw pin is as follows:
TPU
TPU
switch output
SS
Figure 1: Logic diagram
V
V
V
V
When any of the physical tamper inputs, TP
the opposite (i.e., intrusion of a physical enclosure).
(in the case of STM1403B/C. A tamper condition will be detected when the input pin is
(for STM1403B/C).
INT
BAT
INT
BAT
.
CC
;
; or
> V
< V
to V
HV
LV
BAT
, where V
, where V
Figure 5
.
LV
and
HV
OUT
OUT
= lower voltage trip limit (2.0V typ); and where V
= upper voltage trip limit (4.2V typ); and where V
and
Figure
(see
is internally switched to V
Table 2: Signal names
Section : V
6). If not used, tie the pin to V
CC
CC
for currents greater than 80mA (bypassing the
OUT
Figure 7
on or when the part is internally switched
1
to TP
on page
4
and
, change from their normal states to
for a brief overview of the signals
BAT
OUT
SS
13) is internally switched to V
Figure
. A tamper condition will be
and may be used as a “BATT
(in the case of STM1403A) or
OUT
8). If not used, tie the pin
(for STM1403A) or
INT
INT
= V
= V
CC
CC
or
11/35
or
CC
;