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TDA1581 датащи(PDF) 2 Page - NXP Semiconductors

номер детали TDA1581
подробное описание детали  Decoder for traffic warning VWF radio transmissions
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производитель  PHILIPS [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

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March 1992
2
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
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
ORDERING INFORMATION
Note
1. SOT163-1; 1996 August 28.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VP
supply voltage range
7.5
8.5
10
V
IP
supply current
6
mA
ViSK
nominal input voltage
f = 57 kHz
8
mV
Zi
input impedance
f
≤ 57 kHz
100
−−
k
ViSK
control level
−3 dB
2.4
mV
Vi(p-p)
input voltage peak-to-peak value
2
−−
V
mBKon
SK switch-on threshold level
42
%
∆mBK
SK switch hysteresis
3.5
dB
tdSKon
SK switch-on delay
150
ms
tdSKoff
SK switch-off delay
750
ms
mDKon
DK switch-on threshold level
13
%
∆mDK
DK switch hysteresis
3.6
dB
tdDKon
DK switch-on delay
750
ms
tdDKoff
DK switch-off delay
750
ms
Tamb
operating ambient temperature range
−30
+80
°C
EXTENDED
TYPE NUMBER
PACKAGE
PINS
PIN POSITION
MATERIAL
CODE
TDA1581T
20
SO
plastic
SOT163A(1)


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