U6046B

Manufacturer Part NumberU6046B
DescriptionU6046BREAR WINDOW HEATING TIMER / LONG-TERM TIMER
ManufacturerATMEL Corporation
U6046B datasheet
 
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Features
Delay Time Range: 3.7s to 20h
RC Oscillator Determines Timing Characteristics
Relay Driver with Z-diode
Debounced Input for Toggle Switch
Two Debounced Inputs: ON and OFF
Load-dump Protection
RF Interference Protected
Protection According to ISO/TR7637-1 (VDE 0839)
Inputs Switched to V
Batt
1. Description
The bi-polar long-term timer U6046B is designed to automatically limit the operation
time of high loads in the harsh automotive environment with a preset delay time. With
the power-on-reset function the timers guarantee that current consuming devices are
not operated unintentionally.
The delay time can be interrupted manually, but a retrigger function is not provided.
Figure 1-1.
Block Diagram with External Circuit
C
2
OSC
6
Oscillator
Frequency divider
3
ON
4
Debouncing
OFF
5
TOGGLE
47 F
C
R
R
2
1
1
510
V
V
7
stab
S
8
Stabilization
1
Power-on reset
GND
Load-dump detection
2
Relay control
Mono-flop
output
OUT
Rear Window
Heating Timer/
Long-term
Timer
U6046B
V
Batt
Rev. 4674B–AUTO–09/05

U6046B Summary of contents