TDA1579T [NXP]
Decoder for traffic warning VWF radio transmissions; 解码器，用于交通警示VWF无线传输
| 型号： | TDA1579T |
| 厂家： | 
NXP |
| 描述： | Decoder for traffic warning VWF radio transmissions |
| 文件： | 总13页 (文件大小：140K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DATA SHEET
TDA1579
TDA1579T
Decoder for traffic warning (VWF)
radio transmissions
May 1992
Product specification
File under Integrated Circuits, IC01
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
GENERAL DESCRIPTION
Features
The TDA1579 decoder is for radio transmissions having
57 kHz amplitude-modulated subcarriers as used in the
German 'Verkehrs Warnfunk' (VWF) traffic warning
system.
• 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.
QUICK REFERENCE DATA
Measured in Fig.1 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.
PARAMETER
Supply voltage
CONDITIONS
SYMBOL
MIN.
7.5
TYP.
8.5
MAX.
12
UNIT
VP
IP
V
Supply current
−
6
−
−
−
−
−
mA
mV
kΩ
mV
V
Nominal input voltage
Input impedance
Control level
at f = 57 kHz
at f ≤ 57 kHz
−3 dB
ViSK
Zi
−
8
100
−
−
ViSK
2.4
−
Input voltage
peak-to-peak value Vi(p-p)
2
SK switch-on
threshold level
mBKon
∆mBK
tdSKon
tdSKoff
−
−
−
−
42
−
−
−
−
%
SK switch hysteresis
SK switch-on delay
SK switch-off delay
DK switch-on
3.5
150
750
dB
ms
ms
threshold level
mDKon
∆mDK
tdDKon
tdDKoff
−
−
−
−
13
−
−
−
−
%
DK switch hysteresis
DK switch-on delay
DK switch-off delay
Ambient operating
temperature range
3.6
750
750
dB
ms
ms
Tamb
−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
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
Supply voltage
CONDITIONS
pin 7
SYMBOL
VP = V7-18
MIN.
TYP.
MAX.
15
UNIT
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
V
V
V
V
Switch output voltage
Switch output current
Signal input voltage
pin 1
V1-18
V2; 3-18
−V1; 2; 3-18
I1
23
15
0.5
50
5
pins 2 or 3
pins 1, 2 or 3
pin 1
mA
mA
mA
pins 2 or 3
pins 1, 2 or 3
pin 13
I2; 3
−I1; 2; 3
V13-18
−V13-18
−I13
10
VP
0.5
10
800
pin 13
V
Signal input current
Total power dissipation
Storage temperature
range
pin 13
mA
mW
Ptot
Tstg
−55
−30
−
−
+150
+ 80
°C
°C
Operating ambient
temperature range
Tamb
CHARACTERISTICS
VP = 8.5 V; Tamb = 25 °C; measured at nominal input signal: 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.
All pin numbers in this table apply to TDA1579, for TDA1579T refer to Fig.1.
PARAMETER
Supply voltage
CONDITIONS
pin 7
SYMBOL
MIN.
7.5
TYP.
MAX.
12
UNIT
VP
IP
−
V
Supply current
pin 7
−
6
10
mA
SK amplifier/decoder
Input impedance
Input voltage (peak-to-
peak value)
f ≤ 57 kHz
|Zi|
100
2
−
−
−
−
kΩ
Vi(p-p)
V
Input voltage at start of
gain control
Vo9BK = −3 dB
ViSK
−
2.4*
44*
−
−
−
2
−
−
−
mV
dB
Voltage gain
V9BK/V13SK
Gv9-13
± ∆ Gv9-13
∆Gv
−
Gain spread
−
dB
Gain control range
Controlled output voltage
40
−
−
dB
Vo9BK
Vo9DK
440
220
mV
mV
−
May 1992
3
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
PARAMETER
BK circuit
CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
Switch-on threshold level
Switch hysteresis
pin 3 high-Z
Vo5BKon
600
670
750
mV
3
3.5
4
dB
Vo5BKon
---------------------
Vo5BKoff
BK switch threshold level
for BK-off (SK-off)
pin 3
conducting
V4-18off
0.8
0.88
0.97
V
(typ. value = 0.21V8-18
)
SK output (pin 3)
allowable load current
saturation voltage
rejection voltage
I3
−
−
−
−
1.5
0.35
−
mA
V
I3 = 1.5 mA
V3-18sat
V3-18
−
I3 < 5 µA
18
V
Indicator driver (pin 1)
allowable load current
saturation voltage
rejection voltage
I1
−
−
−
−
40
0.8
−
mA
V
I1 = 20 mA
V1-18sat
V1-18
−
I1 < 10 µA
23
V
DK circuit
Switch-on threshold level
Switch hysteresis
pin 2 high-Z
V15DKon
600
3.1
670
3.6
750
4.1
mV
dB
V 15DKon
---------------------
V15DKoff
DK switch threshold level
for DK-off (Schmitt
trigger output)
pin 2
conducting
V16-18off
−
0.6
−
V
(typ. value 1 × VBE
)
DK output (pin 2)
allowable load current
saturation voltage
rejection voltage
I2
−
−
−
−
1.5
0.35
−
mA
V
I2 = 1.5 mA
V2-18sat
V2-18
−
I2 < 5 µA
18
V
BK and DK filter amplifiers
Open loop gain
f = 100 Hz
Go
Gi
84
120
−
−
−
−
−
dB
dB
nA
Current gain
−
Input bias current
Output offset voltage
± Ii
50
R5-6 = R14-15
= 680 kΩ
± Vo5-8
± V15-8
± Io
−
−
50
mV
Available output current
Output resistance
Allowable load
1
−
−
mA
Ro
−
2
3.5
kΩ
capacitance
CL
4
−
−
50
pF
May 1992
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
PARAMETER
CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
Internal reference voltage
Output voltage
V8-18
4.0
4.25
4.5
V
(typ. value = 0.5 VP)
Internal resistance of
voltage source
R8
−
−
−
−
8
5
−
−
−
Ω
Available output current
−I8
2
mA
mA
mA
+I8
0.6
−
Output short-circuit current
−I8sc
(typ. value = VP/1 kΩ)
Reference current source
Reference voltage
V17-18
−
3.6
5
−
V
(typ. value = V8-18−VBE
)
Internal biasing resistor
Ri17
−
−
kΩ
kΩ
Allowable range of external
reference resistor
R17-18
180
−
270
* Selectable by R12-8 or Z10-8
.
May 1992
5
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
APPLICATION INFORMATION (Fig.1)
PARAMETER
SK switch-on threshold
SYMBOL
APPLICATION
UNIT
level at mBK = 60%
SK switch-on threshold
level at ViSK = 8 mV
ViSKon
typ.
1.8
mV
mBKon
typ.
>
32
%
3.0
dB
SK switch hysteresis
typ.
<
3.5
4.0
dB
dB
mBKon
-----------------
mBKoff
SK switch-on delay
(note 1)
typ.
<
95
ms
ms
ms
ms
ms
tdSKon
130
380
500
620
SK switch-off delay
(note 2)
>
tdSKoff
typ.
<
DK switch-on threshold
level at mDK = 30%
ViDKon
typ.
1.5
mV
DK switch-on threshold
level at ViDK = 8 mV
mDKon
typ.
>
13
%
3.1
dB
DK switch hysteresis
typ.
<
3.6
4.1
dB
dB
m DKon
----------------
mDkoff
DK switch-on delay
(note 1)
typ.
<
750
ms
ms
ms
ms
ms
tdDKon
1000
600
DK switch-off delay
(note 2)
>
tdDKoff
typ.
<
750
1000
Notes
1. Sequence for measuring switch-on delay times (tdon
)
a) Nominal BK or DK input signal at pin 13: Vi(p-p) = 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) tdon commences when the ground connection is removed from pin 4 (pin 16) as the positive-going VoBK signal at
pin 5 (VoDK signal at pin 15) crosses zero.
tdon ends when the positive-going edge of the SK output arrives at pin 13 (DK at pin 2).
2. Sequence for measuring switch-off delay times (tdoff
)
a) Nominal operating conditions as in note 1.
b) tdoff commences when the input is switched off as the negative-going VoBK signal at pin 5 (VoDK signal at pin 15)
crosses zero.
tdoff ends when the negative-going edge of the SK output arrives at pin 3 (DK at pin 2).
May 1992
6
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
May 1992
7
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
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
FILTER INFORMATION
Gain
Amplifier conditions: Go >> Gv and Go >> 2 Q2
p
--------------------
R1 C1
V o
Gv = –
, in which p = jω and Gv =
.
------
V i
------------------------------------------------------------------------------------------------------------------
p 2 + p
+
C1 + C2
R1 + R2
--------------------------------
----------------------------------------------------------
R3 C1 C2
R1 R2 R3 C1 C2
C1 = C2 = C
R2 < < R1
GENERAL EQUATION
C1 = C2 = C
Resonance frequency
1
1
1
---------------------------------------------------------------
-------------------------------------------
ωr =
-----------------------------
R1 R2
R1 R2
C R2 R3
R3 C1 C2
----------------------
C
R3
----------------------
R1 + R2
R1 + R2
Gain at ω = ωr
C2
R3
---------------------- -------
1 R3
-- -------
2 R1
1 R3
-- -------
2 R1
−Gvr =
C1 + C2 R1
Quality
R3 (R1 + R2)
-------------------------------------
R1 R2
C1 C2
------------------------
C1 + C2
Q =
1 R3
-- -------
2 R2
R3 (R1 + R2)
-------------------------------------
R1 R2
1
--
2
Recommended components
C1, C2
and
metallized polycarbonate film (MKC) capacitors; ± 5%
R1, R2, R3
or
metal film (MR) resistors; ± 2%
C1, C2
and
metallized polyester film (MKT) capacitors; ± 5%
carbon film (CR) resistors; ± 2%
R1, R2, R3
May 1992
9
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
PACKAGE OUTLINES
DIP18: plastic dual in-line package; 18 leads (300 mil)
SOT102-1
D
M
E
A
2
A
A
1
L
c
e
w M
Z
b
1
(e )
1
b
b
2
18
10
M
H
pin 1 index
E
1
9
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
(1)
Z
A
A
A
2
(1)
(1)
1
w
UNIT
mm
b
b
b
c
D
E
e
e
L
M
M
H
1
2
1
E
max.
min.
max.
max.
1.40
1.14
0.53
0.38
1.40
1.14
0.32
0.23
21.8
21.4
6.48
6.20
3.9
3.4
8.25
7.80
9.5
8.3
4.7
0.51
3.7
2.54
0.10
7.62
0.30
0.254
0.01
0.85
0.055 0.021 0.055 0.013
0.044 0.015 0.044 0.009
0.86
0.84
0.26
0.24
0.15
0.13
0.32
0.31
0.37
0.33
inches
0.19
0.020
0.15
0.033
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
EIAJ
93-10-14
95-01-23
SOT102-1
May 1992
10
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
D
E
A
X
c
y
H
E
v
M
A
Z
20
11
Q
A
2
A
(A )
3
A
1
pin 1 index
θ
L
p
L
1
10
w
detail X
e
M
b
p
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
max.
(1)
(1)
(1)
UNIT
A
A
A
b
c
D
E
e
H
L
L
Q
v
w
y
θ
1
2
3
p
E
p
Z
0.30
0.10
2.45
2.25
0.49
0.36
0.32
0.23
13.0
12.6
7.6
7.4
10.65
10.00
1.1
0.4
1.1
1.0
0.9
0.4
mm
2.65
0.25
0.01
1.27
0.050
1.4
0.25 0.25
0.01
0.1
8o
0o
0.012 0.096
0.004 0.089
0.019 0.013 0.51
0.014 0.009 0.49
0.30
0.29
0.42
0.39
0.043 0.043
0.016 0.039
0.035
0.016
inches 0.10
0.055
0.01 0.004
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
EIAJ
92-11-17
95-01-24
SOT163-1
075E04
MS-013AC
May 1992
11
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
Several techniques exist for reflowing; for example,
SOLDERING
Introduction
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.
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.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.
WAVE SOLDERING
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our “IC Package Databook” (order code 9398 652 90011).
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.
DIP
SOLDERING BY DIPPING OR BY WAVE
• The longitudinal axis of the package footprint must be
parallel to the solder flow.
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 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.
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 (Tstg max). If the
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
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.
REPAIRING SOLDERED JOINTS
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
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.
REPAIRING SOLDERED JOINTS
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.
SO
REFLOW SOLDERING
Reflow soldering techniques are suitable for all SO
packages.
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
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
DEFINITIONS
Data sheet status
Objective specification
Preliminary specification
Product specification
This data sheet contains target or goal specifications for product development.
This data sheet contains preliminary data; supplementary data may be published later.
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.
May 1992
13
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