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U840B

Features: ` Interval-switch A and B to GND` Wipe/ wash push button to VBatt` Output driver protected against short circuit digital debounced: t6 = 10 ms` All time periods digital determined by RC-oscillator` Turn-on time of relay t2 = 375 ms` Adjustable interval pause, t3 = 0.8 to 22 s` Dry wiping...

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SeekIC No. : 004535113 Detail

U840B: Features: ` Interval-switch A and B to GND` Wipe/ wash push button to VBatt` Output driver protected against short circuit digital debounced: t6 = 10 ms` All time periods digital determined by RC-os...

U840B Data Sheet

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Part Number:
U840B
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/5/22

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Product Details

Description



Features:

` Interval-switch A and B to GND
` Wipe/ wash push button to VBatt
` Output driver protected against short circuit digital debounced: t6 = 10 ms
` All time periods digital determined by RC-oscillator
` Turn-on time of relay t2 = 375 ms
` Adjustable interval pause, t3 = 0.8 to 22 s
` Dry wiping time t5 = 3.7 s
` Program Pin PP determines turn-on delay t4 during wipe-wash mode
    PP to GND: t4 = 0.8 s
    PP to VS: t4 = 0 s
    Interval mode: t4 = 0 s
` Inputs CP and INT digital debounced, t1 = 100 ms
` All inputs with integrated RF protection
` Load-dump protected and interference protection according to ISO 76371/3 (DIN 40839)


Pinout

Connection Diagram


Specifications

Parameters
Symbol
Value
Unit
Supply voltage t = 60 s
                     t = 1 h
VS
VS
24
18

V
V

Ambient temperature rang
Tamb
-40to+100
Storage temperature rang
Tstg
-55to+125
max.junction temperature
Tj
150



Description

The circuits U840B (DIP8) and U840B-FP (SO8) are designed as interval wipe/ wash timer for automotive applications. The interval pause t3 can be set in a range from 0.8 s to 22 s by an external 30 k potentiometer. All other time periods of U840B and U840B-FP are determined by the basic frequency f0 of the oscillator. The wipe/ wash (WIWA) mode has priority over the interval mode. The program Pin PP controls, whether the wiper immediatly starts to wipe, or with a delay time t4 of 0.8 s. The inputs CP and INT are digital debounced, the turn-on as well as the turn-off.

The integrated relay driver is protected against short circuits and is switched to conductive condition in the case of a load-dump. The circuit of U840B and U840B-FP is protected with the recommended external circuitry against load-dump and RF interference, refer to ISO 76371/3 (DIN 40839).




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