UCC3946DTRG4

更新时间： 2024-09-19 12:16:55

品牌	Logo	应用领域
德州仪器 - TI		微处理器监控
页数	文件大小	规格书
17页	664K
描述
MICROPROCESSOR SUPERVISOR WITH WATCHDOG TIMER

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中文翻译

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数据手册
替代型号

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UCC3946DTRG4 数据手册

ꢀ ꢁꢁ ꢂꢃ ꢄꢅ

ꢀ ꢁꢁ ꢆꢃ ꢄꢅ

SLUS247F − APRIL 1997 − REVISED NOVEMBER 2007

ꢇꢈ ꢁ ꢉꢊ ꢋꢉꢊ ꢁꢌ ꢍꢍꢊ ꢉ ꢍꢀꢋ ꢌꢉꢎꢈ ꢍꢊ ꢉ

ꢏ ꢈ ꢐꢑ ꢏꢒꢐ ꢁꢑꢓꢊ ꢔ ꢐ ꢈꢇ ꢌꢉ

FEATURES

Fully Programmable Reset Threshold

Fully Programmable Reset Period

Fully Programmable Watchdog Period

2% Accurate Reset Threshold

Input Voltage Down to 2 V

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.

Input 18-µA Maximum Input Current

Reset Valid Down to 1 V

DESCRIPTION

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 available in 8-pin SOIC(D), 8-pin

PDIP (N) and 8-pin TSSOP(PW) packages to

optimize board space.

VDD

POWER TO

CIRCUITRY

400 nA

RES

POWER ON RESET

1.235 V

RTH

8−BIT

COUNTER

400 nA

WDO

GND

100 mV

CLR

1.235 V

CLK

WATCHDOG

TIMING

EDGE DETECT

WDI

UDG−02192

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中文翻译

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UCC3946DTRG4 替代型号

型号	品牌	替代类型	描述	数据表
UCC3946PWTR	TI	类似代替	MICROPROCESSOR SUPERVISOR WITH WATCHDOG TIMER
UCC3946DTR	TI	类似代替	MICROPROCESSOR SUPERVISOR WITH WATCHDOG TIMER
UCC2946PW	TI	功能相似	MICROPROCESSOR SUPERVISOR WITH WATCHDOG TIMER

与UCC3946DTRG4相关器件

型号	品牌	获取价格	描述	数据表
UCC3946N	TI	获取价格	MICROPROCESSOR SUPERVISOR WITH WATCHDOG TIMER
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UCC3946PW	TI	获取价格	MICROPROCESSOR SUPERVISOR WITH WATCHDOG TIMER
UCC3946PWG4	TI	获取价格	MICROPROCESSOR SUPERVISOR WITH WATCHDOG TIMER
UCC3946PWTR	TI	获取价格	MICROPROCESSOR SUPERVISOR WITH WATCHDOG TIMER
UCC3946PWTRG4	TI	获取价格	MICROPROCESSOR SUPERVISOR WITH WATCHDOG TIMER
UCC3952	TI	获取价格	Enhanced Single Cell Lithium-Ion Battery Protection IC
UCC3952-	TI	获取价格	Enhanced Single Cell Lithium-Ion Battery Protection IC
UCC3952-1	TI	获取价格	Enhanced Single Cell Lithium-Ion Battery Protection IC
UCC3952-1DP	ETC	获取价格	Analog IC

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