Datasheet

STWD100 DC and AC parameters
Doc ID 14134 Rev 7 17/25
Table 5. DC and AC characteristics
Symbol Description Test condition
(1)
Min. Typ. Max. Unit
V
CC
Operating voltage 2.7 5 5.5 V
I
CC
V
CC
supply current 13 26 µA
I
LO
Open drain output leakage current From output to the GND or V
CC
–1 +1 µA
Input leakage current (WDI) –1 +1 µA
V
IH
Input high voltage (WDI, EN)0.7 V
CC
V
V
IL
Input low voltage (WDI, EN) 0.3 V
CC
V
V
OL
Output low voltage (WDO)
V
CC
≥ 2.7 V, I
SINK
= 1.2 mA 0.3 V
V
CC
≥ 4.5 V, I
SINK
= 3.2 mA 0.4 V
V
OH
Output high voltage (WDO) (push-pull
only)
V
CC
≥ 2.7 V, I
SOURCE
= 500 µA 0.8 V
CC
V
V
CC
≥ 4.5 V, I
SOURCE
= 800 µA 0.8 V
CC
V
Enable pin ( EN
)
EN
input pulse width 1 µs
EN
glitch rejection 100 ns
EN
-to-WDO delay
(2)
200 ns
EN
pull-down resistance 32 63 100 kΩ
Watchdog timer
V
START
Timer startup voltage 1.9 2.2 2.7 V
t
WD
Watchdog timeout period
STWD100xP 2.3 3.4 4.6 ms
STWD100xW 4.3 6.3 8.6 ms
STWD100xX 71 102 142 ms
STWD100xY 1.12 1.6 2.24 s
t
PW
Watchdog active time 140 210 280 ms
WDI-to-WDO
delay
(3)
150 ns
WDI pulse width 1 µs
WDI glitch rejection 100 ns
1. Valid for ambient operating temperature: T
A
= –40 to 125 °C; V
CC
= 2.7 V to 5.5 V except where noted.
2. WDO
will assert for minimum of 10 µs even if EN transitions high.
3. WDO
will assert for minimum of 10 µs regardless of transition on WDI (valid for STWD100xP only).