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See Technical Specifications

STWD100YNXWY3F

Watchdog timer circuit

Manufacturer:

STMicroelectronics, Inc
Mfr.Part #:

STWD100YNXWY3F
Datasheet:

STWD100YNXWY3F Datasheet (PDF)
prmis_id:

CP431874
parent_id:

PF176674
p_4906:

false
p_5113:

0
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STWD100YNXWY3F General Description

The STWD100 watchdog timer circuits are self-contained devices which prevent system failures that are caused by certain types of hardware errors (such as, non-responding peripherals and bus contention) or software errors (such as a bad code jump and a code stuck in loop).The STWD100 watchdog timer has an input, WDI, and an output,WDO. The input is used to clear the internal watchdog timer periodically within the specified timeout period, twd. While the system is operating correctly, it periodically toggles the watchdog input, WDI. If the system fails, the watchdog timer is not reset, a system alert is generated and the watchdog output,WDO, is asserted.The STWD100 circuit also has an enable pin,EN, which can enable or disable the watchdog functionality. TheENpin is connected to the internal pull-down resistor. The device is enabled if theENpin is left floating.

Key Features

Current consumption 13 µA typ.
Available watchdog timeout periods are 3.4 ms, 6.3 ms, 102 ms, and 1.6 s
Chip enable input
Open drain or push-pullWDO output
Operating temperature range: –40 to 125 °C
Packages: SOT23-5 and SC70-5 (SOT323-5)
ESD performance
- HBM: 2000 V
- RCDM: 1000 V
Automotive qualified

Specifications

prmis_id	CP431874	parent_id	PF176674
item_name	STWD100YNXWY3F	p_4906	false
p_445		p_5113	0
p_1387	0.6708	p_163	Active
p_4418	1000	feature-type	Voltage Supervisory
feature-maximum-power-dissipation-mw	320	feature-packaging	Tape and Reel
feature-rad-hard		feature-pin-count	5
feature-cecc-qualified		feature-esd-protection
feature-escc-qualified		feature-military	No
feature-aec-qualified	Yes	feature-aec-qualified-number	AEC-Q100
feature-auto-motive	Yes	feature-p-pap	Yes
feature-eccn-code	EAR99	feature-svhc	No
feature-svhc-exceeds-threshold	No