UCC3946

활성

워치독 타이머를 지원하는 0°C~70°C, 마이크로프로세서 통제기

제품 상세 정보

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) 0.01 Output driver type/reset output Active-low, Push-Pull Supply voltage (min) (V) 2 Supply voltage (max) (V) 5.5 Rating Catalog Watchdog timer WDI (s) Programmable Operating temperature range (°C) 0 to 70
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) 0.01 Output driver type/reset output Active-low, Push-Pull Supply voltage (min) (V) 2 Supply voltage (max) (V) 5.5 Rating Catalog Watchdog timer WDI (s) Programmable Operating temperature range (°C) 0 to 70
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.

다운로드

관심 가지실만한 유사 제품

open-in-new 대안 비교
다른 핀 출력을 지원하지만 비교 대상 장치와 동일한 기능
TPS35 활성 시간 초과 워치독 타이머를 지원하는 나노 정동작 전류 정밀 통제기 Improved IQ and higher accuracy
TPS35-Q1 활성 시간 초과 워치독 타이머를 지원하는 차량용 나노 정동작 전류 정밀 통제기 Improved IQ and higher accuracy
비교 대상 장치와 유사한 기능
TPS3850-Q1 활성 윈도우 워치독 타이머 및 프로그래머블 지연을 갖춘 OV 및 UV 모니터링을 위한 오토모티브 윈도우 수퍼바이저 Offers overvoltage and undervoltage monitoring with higher reset threshold accuracy and operates at an extend temperature range.

기술 자료

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1개 모두 보기
유형 직함 날짜
* Data sheet Microprocessor Supervisor with Watchdog Timer datasheet (Rev. F) 2007/11/21

주문 및 품질

포함된 정보:
  • RoHS
  • REACH
  • 디바이스 마킹
  • 납 마감/볼 재질
  • MSL 등급/피크 리플로우
  • MTBF/FIT 예측
  • 물질 성분
  • 인증 요약
  • 지속적인 신뢰성 모니터링
포함된 정보:
  • 팹 위치
  • 조립 위치

지원 및 교육

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