UCC2946

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Mikroprozessor-Überwacher, -40 bis 90°C mit Watchdog-Timer

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Datenblatt

document-pdfAcrobat Microprocessor Supervisor with Watchdog Timer datasheet (Rev. F) (Englisch)

UCC2946

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Number of supplies monitored

1

Threshold voltage 1 (typ) (V)

1.235

Features

Overvoltage monitor only, Reset time delay, Timeout watchdog, Watchdog timer

Reset threshold accuracy (%)

2

Iq (typ) (mA)

0.012

Output driver type/reset output

Active-low, Push-Pull

Supply voltage (min) (V)

2.1

Supply voltage (max) (V)

5.5

Rating

Catalog

Watchdog timer WDI (s)

Programmable

Operating temperature range (°C)

-40 to 85

Number of supplies monitored

1

Threshold voltage 1 (typ) (V)

1.235

Features

Overvoltage monitor only, Reset time delay, Timeout watchdog, Watchdog timer

Reset threshold accuracy (%)

2

Iq (typ) (mA)

0.012

Output driver type/reset output

Active-low, Push-Pull

Supply voltage (min) (V)

2.1

Supply voltage (max) (V)

5.5

Rating

Catalog

Watchdog timer WDI (s)

Programmable

Operating temperature range (°C)

-40 to 85

SOIC (D)

8

29.4 mm² 4.9 x 6

TSSOP (PW)

8

19.2 mm² 3 x 6.4

Fully Programmable Reset Threshold
Fully Programmable Reset Period
Fully Programmable Watchdog Period
2% Accurate Reset Threshold
Input Voltage Down to 2 V
Input 18-µA Maximum Input Current
Reset Valid Down to 1 V

Fully Programmable Reset Threshold
Fully Programmable Reset Period
Fully Programmable Watchdog Period
2% Accurate Reset Threshold
Input Voltage Down to 2 V
Input 18-µA Maximum Input Current
Reset Valid Down to 1 V

The UCCx946 is designed to provide accurate microprocessor supervision, including reset and watchdog functions. During power up, the device asserts a reset signal RES with VDD as low as 1 V. The reset signal remains asserted until the VDD voltage rises and remains above the reset threshold for the reset period. Both reset threshold and reset period are programmable by the user.

The UCCx946 is also resistant to glitches on the VDD line. Once RES has been deasserted, any drops below the threshold voltage need to be of certain time duration and voltage magnitude to generate a reset signal. These values are shown in Figure 1. An I/O line of the microprocessor may be tied to the watchdog input (WDI) for watchdog functions. If the I/O line is not toggled within a set watchdog period, programmable by the user, WDO is asserted. The watchdog function is disabled during reset conditions.

The UCCx946 is available in 8-pin SOIC(D), 8-pin PDIP (N) and 8-pin TSSOP(PW) packages to optimize board space.

The UCCx946 is designed to provide accurate microprocessor supervision, including reset and watchdog functions. During power up, the device asserts a reset signal RES with VDD as low as 1 V. The reset signal remains asserted until the VDD voltage rises and remains above the reset threshold for the reset period. Both reset threshold and reset period are programmable by the user.

The UCCx946 is also resistant to glitches on the VDD line. Once RES has been deasserted, any drops below the threshold voltage need to be of certain time duration and voltage magnitude to generate a reset signal. These values are shown in Figure 1. An I/O line of the microprocessor may be tied to the watchdog input (WDI) for watchdog functions. If the I/O line is not toggled within a set watchdog period, programmable by the user, WDO is asserted. The watchdog function is disabled during reset conditions.

The UCCx946 is available in 8-pin SOIC(D), 8-pin PDIP (N) and 8-pin TSSOP(PW) packages to optimize board space.

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Alle anzeigen 5

	Typ	Titel		Datum
*	Data sheet	Microprocessor Supervisor with Watchdog Timer datasheet (Rev. F)		21 Nov 2007
	Application note	Optimizing Resistor Dividers at a Comparator (Rev. B)	PDF \| HTML	30 Apr 2021
	Selection guide	Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H)		28 Feb 2020
	E-book	Voltage Supervisor and Reset ICs: Tips, Tricks and Basics		28 Jun 2019
	Application note	Disabling the Watchdog Timer for TI's Family of Supervisors		30 Okt 2003

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UCC2946

Mikroprozessor-Überwacher, -40 bis 90°C mit Watchdog-Timer

UCC2946

Produktdetails

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