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TDA1579T

Decoder for traffic warning (VWF) radio transmissions

Philips Electronics 

Philips Semiconductors

Decoder for traffic warning (VWF) radio

transmissions

Product specification

TDA1579

TDA1579T

PARAMETER

BK circuit

Switch-on threshold level

Switch hysteresis

BK switch threshold level

for BK-off (SK-off)

(typ. value = 0.21V8-18)

SK output (pin 3)

allowable load current

saturation voltage

rejection voltage

Indicator driver (pin 1)

allowable load current

saturation voltage

rejection voltage

DK circuit

Switch-on threshold level

Switch hysteresis

DK switch threshold level

for DK-off (Schmitt

trigger output)

(typ. value 1 × VBE)

DK output (pin 2)

allowable load current

saturation voltage

rejection voltage

BK and DK filter amplifiers

Open loop gain

Current gain

Input bias current

Output offset voltage

Available output current

Output resistance

Allowable load

capacitance

May 1992

CONDITIONS

SYMBOL

MIN.

TYP. MAX. UNIT

pin 3 high-Z

pin 3

conducting

Vo5BKon

V-V----oo---55--B-B---KK---oo---fn-f

V4-18off

600

670

750

mV

3

3.5

4

dB

0.8

0.88

0.97

V

I3 = 1.5 mA

I3 < 5 µA

I1 = 20 mA

I1 < 10 µA

pin 2 high-Z

pin 2

conducting

I3

V3-18sat

V3-18

I1

V1-18sat

V1-18

V15DKon

V-V----11--55---DD----KK---oo---fn-f

V16-18off

−

−

−

−

18

−

−

−

−

−

23

−

1.5

mA

0.35

V

−

V

40

mA

0.8

V

−

V

600

670

750

mV

3.1

3.6

4.1

dB

−

0.6

−

V

I2 = 1.5 mA

I2 < 5 µA

f = 100 Hz

R5-6 = R14-15

= 680 kΩ

I2

V2-18sat

V2-18

Go

Gi

± Ii

± Vo5-8

± V15-8

± Io

Ro

CL

4

−

−

−

−

18

−

84

−

120

−

−

−

−

−

1

−

−

2

−

−

1.5

mA

0.35

V

−

V

−

dB

−

dB

50

nA

50

mV

−

mA

3.5

kΩ

50

pF

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