TDA1579 Philips Semiconductors, TDA1579 Datasheet - Page 2

• Manufacturer Part Number: TDA1579
• Description: Decoder for traffic warning VWF radio transmissions
• Manufacturer: Philips Semiconductors

Philips Semiconductors
GENERAL DESCRIPTION
The TDA1579 decoder is for radio transmissions having
57 kHz amplitude-modulated subcarriers as used in the
German 'Verkehrs Warnfunk' (VWF) traffic warning
system.
QUICK REFERENCE DATA
Measured in Fig.1 at V
‘BK-traffic area C’ signal; or with f
PACKAGE OUTLINES
TDA1579: 18-lead DIL; plastic (SOT102); SOT102-1; 1996 August 12.
TDA1579T: 20-lead mini-pack; plastic (SO20; SOT163A); SOT163-1; 1996 August 12.
May 1992
Supply voltage
Supply current
Nominal input voltage
Input impedance
Control level
Input voltage
SK switch-on
SK switch hysteresis
SK switch-on delay
SK switch-off delay
DK switch-on
DK switch hysteresis
DK switch-on delay
DK switch-off delay
Ambient operating
Decoder for traffic warning (VWF) radio
transmissions
threshold level
threshold level
temperature range
PARAMETER
iSK
= 8 mV; f = 57 kHz amplitude modulated with f
at f = 57 kHz
at f
peak-to-peak value
m
3 dB
= 125 Hz and m = 30% for DK signal.
CONDITIONS
57 kHz
V
I
V
V
V
m
t
t
m
t
t
T
P
dSKon
dSKoff
dDKon
dDKoff
Z
m
m
amb
P
iSK
iSK
i(p-p)
BKon
DKon
i
BK
DK
2
SYMBOL
Features
Selective subcarrier amplifier (57 kHz) with gain control
Transmitter identification signal (SK) decoder
Area identification signal (BK) and announcement
identification signal (DK) active filtering
BK and DK decoders (Schmitt trigger with switched
hysteresis)
BK and DK switch-on/switch-off delay circuits
Driver output for SK indicator (LED)
SK and BK control outputs.
m
7.5
100
2
= 34.95 Hz and m = 60% for
30
MIN.
8.5
6
8
2.4
42
3.5
150
750
13
3.6
750
750
TYP.
Product specification
12
80
MAX.
TDA1579T
TDA1579
V
mA
mV
k
mV
V
%
dB
ms
ms
%
dB
ms
ms
C
UNIT