Datasheet TDA8349 Specification

INTEGRATED CIRCUITS

DATA SH EET

TDA8349A

Multistandard IF amplifier and
demodulator

Product specification
File under Integrated Circuits, IC02

February 1991

Philips Semiconductors Product specification

Multistandard IF amplifier and

TDA8349A

demodulator

GENERAL DESCRIPTION

The TDA8349A is a multistandard IF amplifier and demodulator with AGC and AFC functions for television receivers.
The device has a video recognition circuit and a video switch for internal or external video for full SCART applications.

FEATURES

• Full-range gain-controlled wideband IF amplifier up to 60 MHz

• Wide-band video amplifier with good linearity and a class AB output stage to ensure a very low output impedance

• Supply independent video output level

• Small second harmonic IF output

• AGC circuit which operates on top sync level (negative modulation) or on white level (positive modulation) or on top

level (MAC) with reduced sensitivity for high sound carriers

• AFC circuit with an internal 90° phase shift circuit, a sample-and-hold circuit for negatively modulated signals to reduce
video dependent AFC information and an analog or digital output

• Video recognition possibility based on horizontal pulse duty cycles

• Video switch for selection of internal or external video signals

• Wide supply voltage range and ripple rejection

• Requires few external components

• Tuner AGC output for npn and pnp tuners

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

14-17

I

14

V

1-2(RMS)

G

v

V

11-17(p-p)

supply voltage (pin 14) 10.2 12 13.2 V
supply current (pin 14) Vi= 10 mV 40 55 65 mA
IF input sensitivity (RMS value) − 50 80 µV
IF gain control range 66 72 − dB
video output voltage (peak-

1.7 1.9 2.1 V

to-peak value)
S/N signal-to-noise ratio V
V

8-17(p-p)

AFC output voltage swing

=10mV 54 61 − dB

i

10 − 11 V

(peak-to-peak value)

ORDERING AND PACKAGE INFORMATION

EXTENDED
TYPE NUMBER

PINS PIN POSITION MATERIAL CODE

PACKAGE

TDA8349A 20 DIL plastic SOT146

Note

1. SOT146-1; 1996 November 29.

(1)

February 1991 2

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

February 1991 3

Fig.1 Block diagram.

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

PINNING

PIN DESCRIPTION

1,2 balanced IF inputs
3 tuner AGC starting point adjustment
4 tuner AGC output
5 AGC time constant
6 AFC on/off switch and sample-and-hold capacitor
7 video switch
8 AFC output Q1
9 AFC output Q2
10 video switch external input
11 video output
12 video switch internal input
13 video switch output
14 positive supply voltage
15,16 reference tuned circuit for demodulator
17 ground
18 mute output
19 coincidence filter
20 system switch

FUNCTIONAL DESCRIPTION
General

The IC consists of the following parts as illustrated in Fig.1:

• Gain controlled video IF amplifier

• Quasi-synchronous demodulator

• Video amplifier/buffer with white spot clamp/inverter and

noise clamp

• AGC circuit which operates either on top sync level
(negative modulation) or on white level (positive
modulation) or on top level (MAC)

• AFC circuit with sample-and-hold circuit for negatively
modulated signals, on/off switch and a digital or analog
output (switchable)

• Circuit for switching between positive and negative
modulation

• Video recognition circuit for sound muting and tuning
indication

• Video switch which facilitates selection between two
different video signals, with different gain settings

IF amplifier

The IF amplifier consists of three AC coupled differential
gain stages with adjustable feedback in the emitter. The
AC coupling allows simple biasing, cascades can be used
and no DC feedback is required. This provides a control
range above 70 dB with good linearity. The minimum input
signal to obtain the nominal output amplitude is
50 µV RMS.

Demodulator

The demodulator is a quasi-synchronous circuit that
employs passive carrier regeneration and a tuned circuit
for selectivity. The regenerated carrier signal is limited by
a clamping circuit before it is fed to the demodulator.
Switching between positive and negative modulation is
achieved by the system switch which provides currents to
the demodulator in a positive or negative direction.

Video amplifier

The video amplifier based on the feedback principle
improves the linearity of the video output buffer. It has an
internal bandgap reference to ensure a stable video output
at different supply voltages and temperatures. This

February 1991 4

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

bandgap also reduces the supply ripple on the video
output to values less than −30 dB. The video amplifier has
a typical bandwidth of 10 MHz which allows application for
all new video standards with bandwidths of up to 10 to
12 MHz. The video output signal has an amplitude of
2 V (p-p). White spot protection comprises a white spot
clamp system combined with a delayed-action inverter
which is also highly resistant to high sound carriers. A
switchable DC shift for positively modulated IF signals
ensures correct signal handling. This switching is obtained
via pin 20, which is the same pin used for switching the
demodulation polarity in the demodulator.
The circuit also has a noise clamp which prevents the
video output becoming less than ±400 mV below the top
sync level at noise peaks. The output buffer of the video
amplifier consists of a class A/B circuit which can handle
large source as well as large sink currents. This makes the
circuit more flexible in several applications with one or
more ceramic filters connected to this output buffer.

AGC control circuit

This converts the AGC detector voltage (pin 5) into a
current signal which controls the gain of the IF amplifier. It
also provides a tuner AGC control output from pin 4,

current limiting is incorporated to prevent internal damage.
The AGC starting point is adjusted by a voltage between 3
and 5 V for pnp tuners and between 7 and 9 V for npn
tuners via pin 3.

AGC circuit

A new AGC system has been designed for the AGC. It will
be a top sync-detector for negatively modulated signals
and a top white level AGC for positively modulated signals.
For optimal flexibility reasons the load and unload currents
of the AGC are chosen such that both, a relatively fast set,
as well as a set with a low tilt are possible for positive (L)
and negative (B/G) modulated signals. For this reason a tilt
ratio between positive (L) and negative (B/G) of
approximately 3:1 has been chosen. This means that in a
fast set the choice of a typical tilt for negatively modulated
signals of 2% will obtain a typical tilt for positively
modulated signals (L) of 6%. For a digital set which
requires a small tilt the choice of tilt can be a factor of 5 or
10 smaller by increasing the AGC capacitor.

The chosen AGC currents:

MODE UNLOAD CURRENT LOAD CURRENT TILT AT 2.2 µF

B/G 50 µA 1.5 mA typ. 0.5% (line tilt)
L 500 nA (note 1) 1.5 mA typ. 1.5% (field tilt)
MAC(positive) 200 nA 1.5 mA typ. 1.2% (frame tilt)
MAC(negative) 500 nA 1.5 mA typ. 1.5% (field tilt)

Note

1. As long as no signal has been identified by the identification detector the unload current will be 50 µA.

Switching between the first three modes can be achieved
by the system switch. This is a 3-level switch which when
grounded selects B/G; open or 5 V selects L, and with pin
20 connected to VCC selects positively modulated MAC.
The IC operates in a fourth mode if the identification
capacitor at pin 19 is connected to VCC, it can be used for
negatively modulated MAC.
During channel switching a situation can occur that
requires the AGC to increase the gain more than for
example 50 dB. If this increase of gain has to be done for
a positively modulated (L) signal, it will be achieved by the
500 nA load current and is therefore extremely slow.
Because the identification information can be used to
indicate that the signal is too small, in this event the
identification circuit will mute, it is possible to increase the

positive unload current to the same value as that used for
negatively modulated signals. This switching is fully
automatic and cannot be switched off.

AFC circuit

The AFC circuit consists of a demodulator stage which is
fed with signals 90° out of phase. A very accurate internally
realized 90° phase shift circuit makes it possible to use the
demodulator IF regenerator tuned circuit for tuning the
AFC circuit. To prevent video ripple on the AFC output
voltage a sample-and-hold circuit is used for negatively
modulated signals. The output signal of the demodulator is
sampled during sync level of the video signal and will be
stored with the aid of an external capacitor.

February 1991 5

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

This sample-and-hold circuit is not used in the L mode, but
it will function as a low-pass filter in this mode and
therefore also reduces the video dependency of the AFC.
A gain stage amplifies the voltage swing by 5 times. The
output of the AFC circuit will be an inverse analog output
on pin 8 when pin 9 is connected to a voltage above 8 V. If
pin 9 is connected to a voltage above 10 V the output will
be a normal analog output. Normally pins 8 and 9 together

unloaded during the sync pulse. The maximum voltage at
this internal capacitor is a value for the main frequency of
the video signal. By changing the value of an external
capacitor it is possible to influence the speed and
sensitivity of the recognition circuit. It is possible to gain
sensitivity performance at disturbed signals by increasing
the value of the external capacitor, however this will
reduce the speed of the identification circuit.

provide digital AFC information.

Video switch circuit

Video recognition circuit

For full scart functions it is necessary to implement a
second mute function for non-video signals in the whole
television concept. This is realized in this IF-IC. With an
internal sync separator and an internal integrator it is
possible to achieve a very sensitive identification circuit,
which measures the mean frequency of the input signal.
This is normally approximately 16 kHz. The integrator

The video switch also provides application for full SCART
functions. The circuit has two inputs, one output and a
control pin. The switch selects either internal or external
video signals. A × 2 gain stage for the external input
provides an equal output level for internal or external video
from the SCART. The crosstalk of the unwanted signal is
better than −50 dB and the total signal handling meets all
the requirements for SCART specifications.

capacitor will be loaded during the whole line time and

LIMITING VALUES

In accordance with the Absolute Maximum System (IEC 134)

SYMBOL PARAMETER MIN. MAX. UNIT

V
P
T
T

14-17
tot
stg
amb

supply voltage (pin 14) −0.5 13.2 V
total power dissipation − 1.2 W
storage temperature range −25 +150 °C
operating ambient temperature range −25 + 75 °C

February 1991 6

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

CHARACTERISTICS

= 12 V; T

V

P

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

supply

V

14-17

I

14

IF amplifier (note 1)
V

1-2

R

1-2

C

1-2

∆G

1-2

∆V

11

V

1-2

f

1-2

Video output (note 5)

V

11

V

11

V

11

V

11

V

11(p-p)

V

11

V

11

V

11

V

11

V

11

Z

11

I

11

I

11

B

11

G

d

ϕ

d

Y

nl

=25°C; carrier frequency 38.9 MHz; negative modulation; unless otherwise specified.

amb

supply voltage (pin 14) 10.2 12 13.2 V
supply current Vi=10mV405565mA

input sensitivity note 2 − 50 80 µV
differential input resistance note 3 − 2 − kΩ
differential input capacitance note 3 − 2 − pF
gain control range 66 72 − dB
output signal for 50 dB input signal

variation note 4

− 0.5 − dB

maximum input signal 100 −−mV
maximum operating frequency 60 −−MHz

zero signal output level note 6

negative modulation − 4.75 − V

positive modulation − 2.65 − V
top sync level (top sync AGC) note 7 − 2.7 − V
white level (white level AGC) note 8 − 4.6 − V
amplitude of video output signal (peak-

to-peak value)

1.7 1.9 2.1 V

amplitude difference (positive/negative) − 010%
video output voltage variation ∆VP=1V −−30 − dB
white spot threshold level see Fig.3 − 5.6 − V
white spot insertion level see Fig.3 − 3.8 − V
noise clamping level see Fig.3 − 2.3 − V
output impedance −−10 Ω
maximum sink current 5 − 10 mA
maximum source current 5 − 10 mA
bandwidth of demodulated output signal 7.5 10.0 − MHz
differential gain note 9 − 2 − %
differential phase note 9 − 7 − deg
luminance non-linearity note 10 − 25%

intermodulation see Figs 6 and 7

α 1.1 MHz blue −−66 − dB
α 1.1 MHz yellow −−60 − dB
α 3.3 MHz blue −−60 − dB
α 3.3 MHz yellow −−60 − dB

February 1991 7

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

signal-to-noise ratio note 11

S/N V
S/N minimum gain 60 66 − dB
V

1(rms)

V

11(rms)

residual carrier signal (RMS value) − 10 20 mV
residual 2nd harmonic of carrier signal (RMS

value)

System switch (note 12)
V

20

I

20

V

20

V

20

I

20

V

20

I

20

maximum voltage for mode B/G 1.4 −−V
input current V20=0V −−300 −µA
minimum voltage for mode L −−3V
maximum voltage for mode L 7 −−V
input current 3 V ≤ pin

minimum voltage for MAC (positive) −−9.5 V
input current V20=V

AGC control circuit

t

11

response to an amplitude increase of
52 dB of the IF input with the AGC
switched to mode B/G

t

11

response to an amplitude decrease of
52 dB of the IF input with the AGC
switched to mode B/G

allowed leakage current of the AGC
capacitor

I

5

I

5

I

5

I

5

top sync level AGC − 10 −µA

white level AGC − 200 − nA

positive MAC AGC − 50 − nA

negative MAC AGC − 200 − nA

Tuner AGC (note 15)

input voltage for tuner AGC starting
point

V

3

V

3

V

3

V

3

I

4

IF input = 200 µV; negative slope 3.0 3.5 − V

IF input = 100 mV; negative slope − 5.0 5.5 V

IF input = 200 µV; positive slope 7.0 7.5 − V

IF input = 100 mV; positive slope − 9.0 9.5 V
maximum current swing of tuner AGC

output

V

4

I

4

∆V

i

output saturation voltage I4=2mA −−300 mV
leakage current −−1µA
input signal variation complete tuner control 0.5 2.0 4.0 dB

=10mV5461−dB

i

− 310mV

20 ≤ 7V

P

−150 − 250 µA

− 500 −µA

note 13 − 2 − ms

note 14 − 25 − ms

35−mA

February 1991 8

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

3

Video switching circuit

EXTERNAL VIDEO INPUT (AC coupled)
V

10(p-p)

I

10

V

10

INTERNAL VIDEO INPUT (DC coupled)
V

12(p-p)

|Z

| input impedance − 2.0 − kΩ

12

V

12

VIDEO OUTPUT
V

13(p-p)

V

13

V

13

I

13

I

13

B

13

minimum tuner take over voltage −−1V

input signal voltage (peak-to-peak value) VO= 2 V(p-p) − 1.0 − V
input current − 3.5 −µA
top sync clamping level I10=1mA − 3.3 − V

input signal voltage (peak-to-peak value) VO= 2 V(p-p) − 2.0 − V

black level input voltage − 3.3 − V

output signal voltage (peak-to-peak
value)

− 2.0 − V

top sync level − 2.7 − V
noise clamping voltage level I13=1mA − 2.5 − V
internal bias current of npn emitter follower

output transistor

− 1.5 − mA

maximum source current 5 − 10 mA
bandwidth of output signal − 5 − MHz

crosstalk of video signal note 16

α external to internal − 60 55 dB
α internal to external − 55 50 dB

VIDEO SWITCH INPUT (note 17)
V

7

V

7

I

7

I

7

maximum voltage for external video
signal

minimum voltage for internal video
signal

minimum source current for internal
video signal

−−2V

1 −−V

−−300 µA

input current V7=0V −−−1mA

February 1991 9

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

I

7

AFC circuit (note 18)
AFC SAMPLE-AND-HOLD/SWITCH (note 19)

I

6

I

6

I

6

AFC ANALOG OUTPUT (V9> 8 V; see Figs 4 and 5)
V

8(p-p)

I

8

input current V7=V

P

−−3µA

AFC switch:
current level below which AFC outputs

switches off

−−−500 µA

maximum AFC switch current V6=0V −−−1mA
maximum leakage current −−1µA

output voltage swing (peak-to-peak
value)

10 − 11 V

maximum output current 500 −−µA

control steepness 60 75 100 mV/kHz

V

8

AFC output voltage AFC off 5 6 7 V

AFC DIGITAL OUTPUT (see Table 1)
V

8,9

V

8,9

output voltage LOW −−0.5 V
output voltage HIGH 50 kΩ load 4.5 − 5.5 V

∆f frequency swing for switching AFC

output Q1

I

8,9

maximum allowable output current 500 −−µA

AFC Analog SWITCH (note 20)
I

9

V

9

V

9

V

9

I

9

I

9

minimum sink current for analog AFC −−1.5 mA
minimum voltage for negative slope −−10.2 V
minimum voltage for positive slope −−8.0 V
maximum voltage for positive slope 10.2 −−V
output current V9=V
output current V9= 8 to 10 V − 150 −µA

Video transmitter identification output (note 21)
V

18

I

18

t

d

output voltage active no sync;

output current inactive sync −−3µA
delay time of mute release after sync

insertion

I

19

allowed leakage current of identification
detector capacitor

65 80 100 kHz

P

I

=1mA − 0.3 0.5 V

18

− 500 −µA

−−10 ms

−−50 nA

February 1991 10

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

Notes

1. All input signals are measured in RMS values at 100% carrier level and a frequency of 38.9 MHz.

2. On set AGC.

3. Input impedance selected so that a SAW filter can be applied without extra components.

4. Measured with 0 dB = 200 µV.

5. Measured at 10 mV(RMS) top sync input signal and the video output unloaded.

6. Projected zero point with internally switched demodulator.

7. With the AGC switch switched to ground, for the B/G standard, or with the identification capacitor switched to V
for the negative MAC standard.

8. With the AGC switch switched open for the L standard, or switched to VCC for the positive MAC standard.

9. Measured in accordance with the test line given in Fig.8.

- The differential gain is expressed as a percentage of the difference in peak amplitudes between the largest and

smallest value relative to the subcarrier amplitude at blanking level.

- The differential phase is defined as the difference in degrees between the phase angle of the 4.4 MHz signal at

20% and 80% luminance signal.

10. Measured in accordance with the test line shown in Fig.9.
The non-linearity is measured by comparing the differences between adjacent pairs of six luminance levels that make

up the 5 step staircase. The measurement result is the largest percentage deviation in adjacent step values. The sign
is always positive.

CC

black-to white

V

11. Measured with a 75 Ω source:

SN⁄ 20

o

---------------------------------------------------------------log=
RMS()at B = 5 MHz

V

n

12. The internal circuit of pin 20 behaves as an internal voltage source of 4.5 V with an input resistance of 15 kΩ. Using
the system switch three conditions can be obtained:

Negative modulation with top sync level AGC. This is achieved with pin 20 connected to ground.
Positive modulation with white level AGC. This is achieved with pin 20 open, or connected to 5 V.
Positive modulation with top white AGC and an increased time constant for MAC signals. This is achieved with pin

20 connected to VCC.

13. Measured with a capacitor of 2.2 µF connected to pin 5. A step is made from 200 µV to 80 mV input signals.

14. Measured with a capacitor of 2.2 µF connected to pin 5. A step is made from 80 mV to 200 µV input signals.

15. It is possible to adjust the tuner AGC over the whole AGC range of the IF amplifier for both pnp and npn tuners. Tuner
AGC starting point is defined as an output current of 0.2 mA for pnp and 1.8 mA for npn, in an application with a
resistance of 6 kΩ to VP at pin 4.

16. Crosstalk is defined as:

20 log

o

--------------------------------------------------------------------------------------­wanted video black-to-white

V

o

measured at 4.4 MHz

unwanted video black-to-white

V

17. The video switch is controlled by a voltage on pin 7. The switching level is approximately 1.4 V. With pin 7 open-circuit
internal video is selected; with pin 7 pulled to ground external video is selected.

18. Measurement taken with an input 10 mV(RMS). The unloaded Q factor of the reference tuned circuit is 70.

19. Switching off the AFC is obtained by a voltage of less than 2 V on pin 6. Normally this is achieved by pulling pin 6 to
ground.

20. Switching to the normal analog AFC mode can be done by pulling pin 9 to a voltage above 10.2 V. Normally this is
achieved by pulling pin 9 to VP.
The inverse analog AFC mode can only be obtained by a voltage of between 8 and 10 V applied to pin 9.

February 1991 11

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

21. All timing figures defined with a capacitor of 2.2 nF at pin 19. The identification can be speeded up by lowering the
value of this capacitor, however this makes the circuit also less sensitive if the video signal is disturbed (airplane
flutter etc.). If the identification is only used as a sound mute a capacitor of 47 nF is recommended to improve the
sensitivity.

Fig.2 Signal-to-noise ratio as a function of video input.

February 1991 12

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

Fig.3 Video waveform showing white spot threshold and insertion levels, and noise clamping levels

Fig.4 Analog AFC output voltage as a function of

frequency pin 9 above 10 V.

February 1991 13

Fig.5 Analog AFC output voltage as a function of

frequency pin 9 above 10 V.

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

Table 1 Digital AFC truth table

INPUT FREQUENCY Q1 Q2

> IF +40 kHz 0 1
> IF 1 1
< IF 1 0
< IF −40 kHz 0 0

SC =sound carrier
CC = chrominance carrier
PC = picture carrier

all with respect to top sync level

Fig.6 Input conditions for intermodulation measurements; standard colour bar with 75% contrast.

Fig.7 Test set-up intermodulation measurements.

February 1991 14

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

Fig.8 Video output signal.

Fig.9 E.B.U. test signal wave form (line 330).

February 1991 15

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

PACKAGE OUTLINE

DIP20: plastic dual in-line package; 20 leads (300 mil)

D

seating plane

L

Z

20

pin 1 index

e

b

SOT146-1

M

E

A

2

A

A

1

w M

b

1

11

E

c

(e )

1

M

H

1

0 5 10 mm

scale

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

A

A

A

UNIT

inches

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

max.

mm

OUTLINE
VERSION

SOT146-1

1 2

min.

max.

1.73

1.30

0.068

0.051

IEC JEDEC EIAJ

b

b

1

0.53

0.38

0.021

0.015

0.36

0.23

0.014

0.009

REFERENCES

cD E e M

(1) (1)

26.92

26.54

1.060

1.045

SC603

February 1991 16

6.40

6.22

0.25

0.24

10

(1)

M

e

L

1

3.60

8.25

3.05

7.80

0.14

0.32

0.12

0.31

EUROPEAN

PROJECTION

H

E

10.0

0.2542.54 7.62

8.3

0.39

0.010.10 0.30

0.33

ISSUE DATE

w

92-11-17
95-05-24

Z

max.

2.04.2 0.51 3.2

0.0780.17 0.020 0.13

Philips Semiconductors Product specification

Multistandard IF amplifier and demodulator TDA8349A

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 our

“IC Package Databook”

Soldering by dipping or by wave

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
be necessary immediately after soldering to keep the temperature within the permissible limit.

(order code 9398 652 90011).

). If the printed-circuit board has been pre-heated, forced cooling may

stg max

Repairing 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.

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.

February 1991 17