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ATA6025 Datasheet

  • ATA6025

  • WATCHDOG IC

  • 257.02KB

  • 13頁

  • ATMEL   ATMEL

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Features
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Watchdog Adjustable
Over- and Undervoltage Detection of V
cc
= 5 V
Standby Modes On/Off via Ignition Pin VKL15
Internal Time Delay for Output Signal
Push-pull Output Driver
Interference and Damage Protection According to ISO/CD 7637
ESD Protection
Description
The ATA6025 is a monolithic circuit based on Atmel鈥檚 smart power BCD60-III technol-
ogy. It is a universal IC for monitoring basic functions of an automotive application. It is
possible to monitor the battery voltage (VKL15) and an external 5 V voltage regulator.
With the independent watchdog the correct function of a microcontroller can be
observed. If a failure occurs, the output NOTL switches to high after a time delay. Dur-
ing standby mode the current consumption is reduced to a minimum.
Figure 1.
Block Diagram
RREF
VBG
VCC
oscillator
on chip
trimming
OSC
VCCH
VCC
over- & undervoltage
detection
IBias
standby mode
BIAS
current
5V regulator
VBG
POR & Bandgap
Reference
VB monitoring
VDD
POR
VBOK
NOTL
Short circuit
2.5 mA
protected
VB
Watchdog IC
ATA6025
VCCL
up
&down
counter
400ms
NL High
at counter end
NL Low
at counter zero
POR
VDD
VKL15
VDD
NVKL15
failure
watchdog
fwd
Watchdog
WD
standby mode
OSC
Input
Test mode 1 or 2
CLK
High at counter
zero
OSC
divided by 4
GND
4716B鈥揂UTO鈥?6/03
1

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