STM1404ARMBQ6F STMICROELECTRONICS [STMicroelectronics], STM1404ARMBQ6F Datasheet - Page 11

• Manufacturer Part Number: STM1404ARMBQ6F
• Description: 3 V FIPS-140 security supervisor with battery switchover
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STM1404
2
2.1
Note:
2.2
2.3
2.3.1
1
2
Pin descriptions
See
connected to this device.
SAL, security alarm output (open drain)
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
TP
Physical tamper detect pin set normally to high (NH). They are connected externally through
a closed switch or a high-impedance resistor to V
the case of STM1404B/C. A tamper condition will be detected when the input pin is pulled
low (see
or V
TP
Physical tamper detect pin set normally to low (NL). They are connected externally through
a high-impedance resistor or a closed switch to V
when the input pin is pulled high (see
pin to V
Vccsw, V
This output is low when V
V
can source an external device directly from V
the STM1404).
This pin goes high when V
“BATTERY ON” indicator.
CC
1
2
TPU
; in this mode it may be used to turn on an external p-channel MOSFET switch which
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).
T
+85°C, and +95°C), factory-programmed (STM1404 only);
T
–35°C), factory-programmed (STM1404 only);
, TP
, TP
A
A
INT
BAT
INT
BAT
CC
SS
> T
< T
(for STM1404B/C).
Figure 5
;
; or
> V
< V
to V
.
H
L
3
4
CC
, where T
, where T
HV
LV
BAT
, where V
switch output
, where V
.
and
L
H
Figure 6 on page
is a lower temperature trip limit specified by the customer (–25°C or
is an upper temperature trip limit specified by the customer (+80°C,
LV
HV
OUT
OUT
= lower voltage trip limit (2.0 V typ); and where V
= upper voltage trip limit (4.2 V typ); and where V
and
(see
is internally switched to V
Table 2: Signal names
Section 2.10: V
Figure 7
10). If not used, tie the pin to V
CC
CC
and
on or when the part is internally switched
1
for currents greater than 80 mA (bypassing
OUT
SS
to TP
OUT
Figure 8 on page
. A tamper condition will be detected
(in the case of STM1404A) or V
4
on page
, change from their normal states to
for a brief overview of the signals
BAT
and may be used as a
13) is internally switched to
10). If not used, tie the
OUT
Pin descriptions
(for STM1404A)
INT
INT
= V
= V
CC
TPU
CC
or
11/36
or
(in