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TEMIC Semiconductors - Dual Output Flasher

Numéro de référence U2044B
Description Dual Output Flasher
Fabricant TEMIC Semiconductors 
Logo TEMIC Semiconductors 





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U2044B fiche technique
Dual Output Flasher
U2044B
Description
The integrated circuit U2044B is used in relay controlled
automotive flashers. With two output stages each side of
the vehicle is controlled separately. A left and a right
direction indicator input with only a small control current
makes switch contacts for small loads possible.
The separate hazard warning input simplifies the
construction of the hazard switch. Lamp outage is indi-
cated by frequency doubling during direction mode.
Thanks to the extreme low current consumption U2044B
can be connected to the battery directly.
Features
D Temperature and supply voltage compensated
flashing frequency
D Frequency doubling indicates lamp outage
D Two relay driver outputs with high current-carrying
capacity and low saturation voltage
wD Minimum lamp load for flasher operation: 1 W
D Very low susceptibility to EMI
D Protection according to ISO/TR7637/1 level 4
D Extremly low current consumption < 10 mA
(@switches open)
D Reverse polarity protection
D Three control inputs: left, right and hazard warning
Ordering Information
Extended Type Number
U2044B
U2044B-FP
Package
DIP14
SO14
Remarks
Pin Description
Pin Symbol
Function
1 OSC Oscillator
2 SIL Start input left
3 SIR Start input right
4 SIHW Start input hazard warning
5 VS VS
6 CR1 Control input relay 1
7 CR2 Control input relay 2
8 LD Lamp failure detection
9 VS VS
10 GND IC ground
11 OR1 Output relay 1
12 VS VS
13 OR2 Output relay 2
14 OSC Oscillator
OSC 1
SIL 2
SIR 3
14 OSC
13 OR2
12 Vs
SIHW 4 U2044B 11 OR1
VS 5
10 GND
CR1 6
CR2 7
9 VS
8 LD
12750
Figure 1. Pinning
TELEFUNKEN Semiconductors
Rev. A1, 25-Feb-97
1 (6)

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