Page 1
INTEGRATED CIRCUITS
DATA SH EET
TDA1579
TDA1579T
Decoder for traffic warning (VWF)
radio transmissions
Product specification
File under Integrated Circuits, IC01
May 1992
Page 2
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
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
PARAMETER CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
Supply voltage V
Supply current I
Nominal input voltage at f = 57 kHz V
Input impedance at f ≤ 57 kHz Z
Control level −3 dB V
Input voltage peak-to-peak value V
SK switch-on
threshold level m
SK switch hysteresis ∆m
SK switch-on delay t
SK switch-off delay t
DK switch-on
threshold level m
DK switch hysteresis ∆m
DK switch-on delay t
DK switch-off delay t
Ambient operating
temperature range T
= 8 mV; f = 57 kHz amplitude modulated with fm = 34.95 Hz and m = 60% for
iSK
= 125 Hz and m = 30% for DK signal.
m
P
P
iSK
100 −−kΩ
i
iSK
i(p-p)
BKon
BK
dSKon
dSKoff
DKon
DK
dDKon
dDKoff
amb
TDA1579
TDA1579T
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.
7.5 8.5 12 V
− 6 − mA
− 8 − mV
− 2.4 − mV
2 −−V
− 42 − %
− 3.5 − dB
− 150 − ms
− 750 − ms
− 13 − %
− 3.6 − dB
− 750 − ms
− 750 − ms
−30 −+ 80 °C
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 2
Page 3
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134). All pin numbers in this table apply to
TDA1579; for TDA1579T refer to Fig.1.
PARAMETER CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
Supply voltage pin 7 V
Switch output voltage pin 1 V
pins 2 or 3 V
pins 1, 2 or 3 −V
Switch output current pin 1 I
pins 2 or 3 I
pins 1, 2 or 3 −I
Signal input voltage pin 13 V
pin 13 −V
Signal input current pin 13 −I
Total power dissipation P
= V
P
1-18
2; 3-18
1; 2; 3-18
1
2; 3
1; 2; 3
13-18
13-18
13
tot
7-18
−−15 V
−−23 V
−−15 V
−−0.5 V
−−50 mA
−−5mA
−−10 mA
−−V
P
−−0.5 V
−−10 mA
−−800 mW
Storage temperature
range T
stg
−55 −+150 °C
Operating ambient
temperature range T
amb
−30 −+80 °C
CHARACTERISTICS
= 8.5 V; T
V
P
f
= 34.95 Hz and m = 60% for ‘BK-traffic area C’ signal; or with fm = 125 Hz and m = 30% for DK signal.
m
= 25 °C; measured at nominal input signal: V
amb
= 8 mV, f = 57 kHz amplitude modulated with
iSK
All pin numbers in this table apply to TDA1579, for TDA1579T refer to Fig.1.
PARAMETER CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
Supply voltage pin 7 V
Supply current pin 7 I
P
P
7.5 − 12 V
− 610mA
SK amplifier/decoder
Input impedance f ≤ 57 kHz |Zi| 100 −−kΩ
Input voltage (peak-to-
peak value) V
i(p-p)
2 −−V
Input voltage at start of
gain control V
Voltage gain V
= −3 dB V
o9BK
9BK/V13SK
G
iSK
v9-13
Gain spread ± ∆ G
Gain control range ∆G
Controlled output voltage V
V
v
o9BK
o9DK
v9-13
− 2.4* − mV
− 44* − dB
−−2dB
40 −−dB
− 440 − mV
− 220 − mV
May 1992 3
Page 4
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
PARAMETER CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
BK circuit
Switch-on threshold level pin 3 high-Z V
Switch hysteresis 3 3.5 4 dB
o5BKon
V
o5BKon
--------------------- V
o5BKoff
600 670 750 mV
BK switch threshold level
for BK-off (SK-off) pin 3
0.8 0.88 0.97 V
(typ. value = 0.21V
8-18
conducting V
4-18off
)
SK output (pin 3)
allowable load current I
saturation voltage I
rejection voltage I
= 1.5 mA V
3
< 5 µAV
3
3
3-18sat
3-18
−−1.5 mA
−−0.35 V
18 −−V
Indicator driver (pin 1)
allowable load current I
saturation voltage I
rejection voltage I
= 20 mA V
1
< 10 µAV
1
1
1-18sat
1-18
−−40 mA
−−0.8 V
23 −−V
DK circuit
Switch-on threshold level pin 2 high-Z V
Switch hysteresis 3.1 3.6 4.1 dB
15DKon
V
15DKon
--------------------- V
15DKoff
600 670 750 mV
DK switch threshold level
for DK-off (Schmitt pin 2
trigger output) conducting V
(typ. value 1 × V
BE
)
16-18off
− 0.6 − V
DK output (pin 2)
allowable load current I
saturation voltage I
rejection voltage I
= 1.5 mA V
2
< 5 µAV
2
2
2-18sat
2-18
−−1.5 mA
−−0.35 V
18 −−V
BK and DK filter amplifiers
Open loop gain f = 100 Hz G
Current gain G
Input bias current ± I
Output offset voltage R
5-6
= R
14-15
= 680 kΩ± V
± V
Available output current ± I
Output resistance R
o
i
i
o5-8
15-8
o
o
84 −−dB
120 −−dB
−−50 nA
−−50 mV
1 −−mA
− 2 3.5 kΩ
Allowable load
capacitance C
L
−−50 pF
May 1992 4
Page 5
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
PARAMETER CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
Internal reference voltage
Output voltage V
(typ. value = 0.5 V
Internal resistance of
voltage source R
Available output current −I
Output short-circuit current −I
(typ. value = V
Reference current source
Reference voltage V
(typ. value = V
Internal biasing resistor R
Allowable range of external
reference resistor R
)
P
/1 kΩ)
P
8-18−VBE
)
+I
8-18
8
8
8
8sc
17-18
i17
17-18
TDA1579
TDA1579T
4.0 4.25 4.5 V
−−5Ω
2 −−mA
0.6 −−mA
− 8 − mA
− 3.6 − V
− 5 − kΩ
180 − 270 kΩ
* Selectable by R
12-8
or Z
10-8
.
May 1992 5
Page 6
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
APPLICATION INFORMATION (Fig.1)
PARAMETER SYMBOL APPLICATION UNIT
SK switch-on threshold
level at m
= 60% V
BK
iSKon
typ. 1.8 mV
SK switch-on threshold
level at V
= 8 mV m
iSK
BKon
typ. 32 %
> 3.0 dB
SK switch hysteresis typ.
m
BKon
----------------m
BKoff
<
3.5
4.0
SK switch-on delay typ. 95 ms
(note 1) t
dSKon
< 130 ms
SK switch-off delay > 380 ms
(note 2) t
dSKoff
typ. 500 ms
< 620 ms
DK switch-on threshold
level at m
= 30% V
DK
iDKon
typ. 1.5 mV
DK switch-on threshold
level at V
= 8 mV m
iDK
DKon
typ. 13 %
> 3.1 dB
DK switch hysteresis typ.
m
DKon
----------------m
Dkoff
<
3.6
4.1
dB
dB
dB
dB
DK switch-on delay typ. 750 ms
(note 1) t
dDKon
< 1000 ms
DK switch-off delay > 600 ms
(note 2) t
dDKoff
typ. 750 ms
< 1000 ms
Notes
1. Sequence for measuring switch-on delay times (t
a) Nominal BK or DK input signal at pin 13: V
i(p-p)
)
don
= 8 mV; f = 57 kHz; modulation-on.
b) Pin 4 of the BK detector (pin 16 of the DK detector) is switched to ground to cause a low signal at the SK output
at pin 3 (DK output at pin 2).
c) t
commences when the ground connection is removed from pin 4 (pin 16) as the positive-going V
don
pin 5 (V
t
ends when the positive-going edge of the SK output arrives at pin 13 (DK at pin 2).
don
signal at pin 15) crosses zero.
oDK
2. Sequence for measuring switch-off delay times (t
doff
)
oBK
a) Nominal operating conditions as in note 1.
b) t
commences when the input is switched off as the negative-going V
doff
signal at pin 5 (V
oBK
signal at pin 15)
oDK
crosses zero.
t
ends when the negative-going edge of the SK output arrives at pin 3 (DK at pin 2).
doff
signal at
May 1992 6
Page 7
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
= 57 kHz.
o
= 70; C = 3.3 nF; f
L
Pin numbers in parentheses are for TDA1579T,
other pin numbers are for TDA1579.
L = 2.36 mH; Q
May 1992 7
= 55 Hz; Q = 1.9
= 24 Hz; Q = 1.9
= 125 Hz
o
o
o
(2) f
(3) f
(1) f
Fig.1 Application diagram.
Page 8
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
Fig.2 BK signal voltage at pin 5 as a function of
frequency.
Fig.3 DK signal voltage at pin 15 as a function of
frequency: fo = 125 Hz; Q ≈ 18.
Fig.4 Control characteristic of the SK amplifier at VP = 8.5 V, mBK = 60% and QL = 70.
May 1992 8
Page 9
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
FILTER INFORMATION
Gain
Amplifier conditions: G
–=
G
-------------------------------------------------------------------------------------------------------------------
v
2
C1 C2+
++
p
p
-------------------------------- R3 C1 C2⋅⋅
>> Gv and Go>> 2 ⋅ Q
o
p
-------------------R1 C1⋅
R1 R2+
---------------------------------------------------------R1 R2 R3 C1 C2⋅⋅⋅⋅
2
V
, in which p = jω and Gv=.
------
o
V
i
TDA1579
TDA1579T
GENERAL EQUATION C1 = C2 = C
Resonance frequency
Gain at ω = ω
Quality
Recommended components
C1, C2 metallized polycarbonate film (MKC) capacitors; ± 5%
and
R1, R2, R3 metal film (MR) resistors; ± 2%
or
C1, C2 metallized polyester film (MKT) capacitors; ± 5%
and
R1, R2, R3 carbon film (CR) resistors; ± 2%
r
−Gvr=
-----------------------------------------------------------------
=
ω
r
R1 R2⋅
---------------------R1 R2+
C2
---------------------C1 C2+
Q=
C1 C2⋅
-----------------------C1 C2+
1
R3 C1 C2⋅⋅⋅
R3
⋅
------- R1
R3 R1 R2+()
------------------------------------- -⋅
R1 R2⋅
-------------------------------------------R1 R2⋅
C
---------------------R1 R2+
1
R3
⋅
-- -
------- -
2
R1
R3 R1 R2+()
1
------------------------------------- -
-- R1 R2⋅
2
C1 = C2 = C
R2 < < R1
1
R3⋅
1
----------------------------CR2R3⋅
1
R3
⋅
-- -
------- -
2
R1
R3
1
⋅
------- -
-- R2
2
May 1992 9
Page 10
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
PACKAGE OUTLINES
DIP18: plastic dual in-line package; 18 leads (300 mil)
D
seating plane
L
Z
18
e
b
TDA1579
TDA1579T
SOT102-1
M
E
A
2
A
A
1
w M
b
1
b
2
10
c
(e )
1
M
H
pin 1 index
1
0 5 10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
A
A
UNIT
max.
mm
inches
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
SOT102-1
12
min.
max.
IEC JEDEC EIAJ
b
1.40
1.14
0.055
0.044
b
1
0.53
0.38
0.021
0.015
b
2
0.32
1.40
0.23
1.14
0.013
0.055
0.009
0.044
REFERENCES
(1) (1)
cD E e M
21.8
21.4
0.86
0.84
9
6.48
6.20
0.26
0.24
E
(1)
Z
L
e
1
M
3.9
8.25
3.4
7.80
0.15
0.32
0.13
0.31
EUROPEAN
PROJECTION
E
0.37
0.33
H
9.5
8.3
w
max.
0.2542.54 7.62
0.854.7 0.51 3.7
0.010.10 0.30
0.0330.19 0.020 0.15
ISSUE DATE
93-10-14
95-01-23
May 1992 10
Page 11
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
SO20: plastic small outline package; 20 leads; body width 7.5 mm
D
c
y
Z
20
11
TDA1579
TDA1579T
SOT163-1
E
H
E
A
X
v M
A
pin 1 index
1
e
0 5 10 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
mm
A
max.
2.65
0.10
A
1
0.30
0.10
0.012
0.004
A
2.45
2.25
0.096
0.089
A
b
0.49
0.36
p
cD
0.32
0.23
0.013
0.009
2
3
0.25
0.019
0.01
0.014
UNIT
inches
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
10
w M
b
p
scale
(1)E(1) (1)
13.0
12.6
0.51
0.49
eHELLpQ
7.6
1.27
7.4
0.30
0.050
0.29
10.65
10.00
0.42
0.39
Q
A
2
A
1
1.4
0.055
1.1
0.4
0.043
0.016
detail X
1.1
1.0
0.043
0.039
(A )
L
p
L
0.25
0.01
A
3
θ
0.25 0.1
0.01
ywv θ
Z
0.9
0.4
8
0.004
0.035
0.016
0
o
o
OUTLINE
VERSION
SOT163-1
IEC JEDEC EIAJ
075E04 MS-013AC
REFERENCES
May 1992 11
EUROPEAN
PROJECTION
ISSUE DATE
92-11-17
95-01-24
Page 12
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
“IC Package Databook”
our
DIP
OLDERING BY DIPPING OR BY WAVE
S
The maximum permissible temperature of the solder is
260 °C; solder at this temperature must not be in contact
with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.
The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
R
EPAIRING SOLDERED JOINTS
Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300 °C it may remain in
contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.
SO
REFLOW SOLDERING
Reflow soldering techniques are suitable for all SO
packages.
(order code 9398 652 90011).
). If the
stg max
TDA1579
TDA1579T
Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250 °C.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.
AVE SOLDERING
W
Wave soldering techniques can be used for all SO
packages if the following conditions are observed:
• A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave) soldering
technique should be used.
• The longitudinal axis of the package footprint must be
parallel to the solder flow.
• The package footprint must incorporate solder thieves at
the downstream end.
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150 °C within
6 seconds. Typical dwell time is 4 seconds at 250 °C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
EPAIRING SOLDERED JOINTS
R
Fix the component by first soldering two diagonally-
opposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300 °C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320 °C.
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
May 1992 12
Page 13
Philips Semiconductors Product specification
Decoder for traffic warning (VWF) radio
transmissions
DEFINITIONS
Data sheet status
Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
TDA1579
TDA1579T
May 1992 13
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