TDA1581 Просмотр технического описания (PDF) - Philips Electronics
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TDA1581 Datasheet PDF : 14 Pages
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Philips Semiconductors
Decoder for traffic warning (VWF) radio
transmissions
Preliminary specification
TDA1581T
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
• SK and BK control outputs.
GENERAL DESCRIPTION
The TDA1581T 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.3 at ViSK = 8 mV; f = 57 kHz amplitude modulated with fm = 34.95 Hz and m = 60% for ‘BK-traffic area
C’ signal; or with fm = 125 Hz and m = 30% for DK signal
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
VP
IP
ViSK
Zi
ViSK
Vi(p-p)
mBKon
∆mBK
tdSKon
tdSKoff
mDKon
∆mDK
tdDKon
tdDKoff
Tamb
supply voltage range
supply current
nominal input voltage
input impedance
control level
input voltage peak-to-peak value
SK switch-on threshold level
SK switch hysteresis
SK switch-on delay
SK switch-off delay
DK switch-on threshold level
DK switch hysteresis
DK switch-on delay
DK switch-off delay
operating ambient temperature range
f = 57 kHz
f ≤ 57 kHz
−3 dB
7.5 8.5 10
V
−
6
−
mA
−
8
−
mV
100 −
−
kΩ
−
2.4 −
mV
2
−
−
V
−
42
−
%
−
3.5 −
dB
−
150 −
ms
−
750 −
ms
−
13
−
%
−
3.6 −
dB
−
750 −
ms
−
750 −
ms
−30 −
+80 °C
ORDERING INFORMATION
EXTENDED
TYPE NUMBER
PINS
TDA1581T
20
Note
1. SOT163-1; 1996 August 28.
PACKAGE
PIN POSITION
SO
MATERIAL
plastic
CODE
SOT163A(1)
March 1992
2
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