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U6808B PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 U6808B
部品説明 Specia Fail-safe IC
メーカ ATMEL Corporation
ロゴ ATMEL Corporation ロゴ 



Total 14 pages
		

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U6808B Datasheet, U6808B PDF,ピン配置, 機能
Features
Digital Self-supervising Watchdog with Hysteresis
One 250-mA Output Driver for Relay
Enable Output Open Collector 8 mA
Over/Undervoltage Detection
ENABLE and RELAY Outputs Protected Against Standard Transients
and 40V Load Dump
ESD Protection According to MIL-STD-883 D Test Method 3015.7
– Human Body Model: ±2 kV (100 pF, 1.5 k)
– Machine Model: ±200 V (200 pF, 0)
1. Description
The U6808B is designed to support the fail-safe function of a safety critical system
(e.g., ABS). It includes a relay driver, a watchdog controlled by an external R/C-net-
work and a reset circuit initiated by an over and undervoltage condition of the 5-V
supply providing a low-level reset signal.
Figure 1-1. Block Diagram
VS
Bandgap
reference
+ 2.44 V
-
+
-
Power-on
reset
Reset
debounce
VS
www.DataSheet4U.com
Reset
delay
RESET
RELAY
Special
Fail-safe IC
U6808B
Under/ overvoltage
detection
RIN
WDI
ENABLE
-
+
Internal
oscillator
Current
limitation
+
-
Watchdog
RC
oscillator
GND
WDC
Rev. 4707B–AUTO–10/05

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部品番号部品説明メーカ
U6808B

Specia Fail-safe IC

ATMEL Corporation
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