Datasheet uba2000t DATASHEETS (Philips)

INTEGRATED CIRCUITS

DATA SH EET

UBA2000T

Electronic TL-lamp starter

Product specification
File under Integrated Circuits, IC11

1996 Jan 03

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

FEATURES

• Electronic starter, fully compatible with conventional
glow-switch starters

• Reliable and instant ignition

• Accurate defined preheat time derived from the mains

frequency

• Increased starter life since no mechanical parts are
used

• No radio-interference (according to

• Automatic reset after interruption of supply voltage

• Large operating temperature range: −40 to +85 °C

• Maximum current protection of the preheat current

• Ignition shut-off at end of lamp life; no overheating of

load.

ORDERING INFORMATION

TYPE NUMBER

NAME DESCRIPTION VERSION

UBA2000T SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1

“IEC926 10.5”

)

GENERAL DESCRIPTION

The UBA2000T is an integrated circuit for electronic
TL-lamp starters and is fully compatible with conventional
glow switch starters. The circuit controls the preheating
and ignition of the lamp. The preheat time is well defined
without spread, since it is derived from the mains
frequency. When the lamp fails, ignition is shut-off after 7
ignition attempts. The circuit has an automatic reset when
the supply voltage is interrupted.

PACKAGE

1996 Jan 03 2

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

BLOCK DIAGRAM

handbook, full pagewidth

V

TEST

sense

V

CC

6

4

V

in

IC-SUPPLY

V

supply

UBA2000T

V

CC(rst)

8

1

V

ign

VOLTAGE

DETECTORS

R

sense

THS

RES

OF STARTS

COUNTER

1 kΩ

NUMBER

TIME

SELECT

DECODER 1 DECODER 2

COUNTER

CURRENT

DETECTOR

CURRENT

PROTECTION

LATCH

OUTPUT

DRIVER

EDGE

DETECTOR

3

V

out

2
GND

Fig.1 Block diagram.

1996 Jan 03 3

MGE002

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

PINNING

SYMBOL PIN DESCRIPTION

V

sense

1 sense voltage
GND 2 ground (0 V)
V

out

V

in

3 output voltage

4 input voltage
n.c. 5 not connected
V

CC

6 supply voltage
n.c. 7 not connected
TEST 8 test pin

handbook, halfpage

V

sense

V

out
V

in

1
2

UBA2000T

3
4

MGE001

Fig.2 Pin configuration.

TEST

8

n.c.GND

7

V

6

CC

n.c.

5

FUNCTIONAL DESCRIPTION

The UBA2000T is an Integrated Circuit that performs all
functions necessary to ignite a TL-lamp. The circuit is
connected to the lamp circuit according to Figs. 7 or 8.
The mains voltage is rectified and divided over resistors
R1 and R2 to a lower level. When the mains power is
switched on, the buffer capacitor C1 is charged through
the resistive divider and internal switch S1. As long as the
supply voltage at the buffer capacitor (VCC, see
“Characteristics”) is below the reset level (V

CC(rst)

),

the UBA2000T initializes its internal circuitry.
When V

has reached the start level (V

CC

peak value of Vin>V

(indicating that the mains supply is

ign

CC(sl)

) and the

near its peak value), the external switching device TH1 will
be turned on. This results in a current through the
electrodes of the TL-lamp, the switching device and an
integrated sense resistor. Because the current starts to
flow when the mains voltage is near its peak value,
transient currents are limited.

handbook, full pagewidth

V

CC(sl)

When the switching device is turned on, the circuit draws
its supply current from buffer capacitor C1. A typical wave
shape of the voltage at pin 6 (V

) is given in Fig.3. During

CC

the preheat periods the buffer capacitor is discharged.
The rectified current through the sense resistor is detected
and the output signal of the detector is used as a clock
signal for the counter. The preheat time is defined to 1.52 s
(at 50 Hz mains supply) using this counter. The preheat
time is very accurate, since it only depends on the
frequency of the mains supply.

After preheating, the switching device is turned off when
the current through the internal sense resistor equals at
least 285 mA. As a result of the current interruption and the
presence of an inductive load, a voltage peak is generated
that will normally ignite the TL-lamp. After ignition, the
lamp voltage is lower than the mains voltage. An ignited
TL-lamp prevents the voltage at pin 6 (VCC) to exceed start
level. In Fig.3 the TL-lamp is ignited after two ignition
attempts.

MGE006

V

CC

first
ignition

first preheat

t

ini

t

prf

Fig.3 Typical wave shape of supply voltage.

1996 Jan 03 4

second
ignition

second
preheat

t

prn

time

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

During preheating, the integrated circuit draws its supply
current from the buffer capacitor. As a result, the voltage
over the buffer capacitor decreases. When the ignition has
failed after the ignition pulse, the voltage on the buffer
capacitor increases to start level and the external
switching device will be turned on again. This time the
preheat time is reduced to 0.64 seconds because the lamp
electrodes are still warm. An internal counter limits the
number of ignitions attempts to 7. This prevents the lamp
from flickering at end of lamp life.

The UBA2000T has an integrated current protection.
When the current through the sense resistor exceeds the
protection level (I

), the switching device is turned off

prot

and the circuit will enter a standby state. Switching the
mains voltage off and on again will reset the circuit.

The flow chart of the starting process is given in Fig.5.
In the following subsections the several blocks of the block
diagram are described in more detail.

IC supply

When the mains power is switched on, the buffer capacitor
is charged and the internal current source is started.
The internal voltage is stabilized, making it independent of
the voltage at the buffer capacitor. An internal zener diode
limits the voltage at pin 6 (V

) to start level (V

CC

CC(sl)

).

This time depends on the value of C1, the IC current and
the source resistance at pin V

(R1//R2). When the mains

in

voltage is near its peak value, the switching device is
actually turned on. When the voltage decreases to a value
indicating that the mains supply is interrupted, the starter
is ready to start preheating and igniting the TL-lamp at the
moment the mains supply returns.

Latch

The internal state of the latch represents the state of the
switching device. The setting of the latch depends on the
outputs of the voltage detectors, the number of starts
counter and the standby state. Resetting the latch is
controlled by the timer, the current detector and the current
protection circuit.

Current detector

The current detector detects when the switching device
must be turned off. The current detector also generates the
clock pulses to activate the counter (see Fig.4). For proper
functioning, the preheat current should be within the range
indicated by I

. By including an hysteresis, unwanted

pr

current peaks on the preheat current have no effect on the
counter. Because the current detector has a low-pass
transfer function, it is not influenced by spikes. This
circuitry eliminates the effect of spikes on the preheat time.

Voltage detectors

The voltage detectors measure the voltage on the buffer
capacitor and activate the switching device when the start
value (V
capacitor is the initial time (t

handbook, full pagewidth

) is reached. The time required to charge the

CC(sl)

, see also Fig.3).

ini

hysteresis

MGE007

clock generation during preheat

Fig.4 Current detection.

Edge detector

The edge detector ensures that the switching device will
be turned off when the rectified preheat current is on the
negative-going edge.

I

level

so

current through

sense resistor

clock signal

(fed to counter)

switch off level at end of preheat

1996 Jan 03 5

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

handbook, full pagewidth

LOW VOLTAGE DETECTION

no

VCC < V

CC(rst)

yes

Close int. switches

Turn ext. switch off

(if it was on)

Standby state

Start

charging of C1

S1 is closed

Enable reset

N = 1

no

VCC > V

Disable reset

no

VCC > V

yes

N > 7

Open int. switches

no

Vin > V

Switch ext. switch on

CC(rst)

yes

CC(sl)

yes

no

ign

yes

N: ignition attempt count

The ext. switch is closed
when mains voltage is
near its peak value

CURRENT ALARM !!

Close int. switches

Turn ext. switch off

(if it was on)

Standby state

yes

I

sense

and t > t

time > t

yes

> I

Preheat

yes

prot

d

no

no no

prf

no

I

sense

I

Close int. switches
Turn ext.switch off

(Generate voltage-peak

to ignite TL-lamp)

Fig.5 Flow chart.

1st start ?

(N = 1)

falling edge ?

= I

sense

yes

N = N + 1

no

I

sense

and t > t

Preheat

time > t

yes

so

yes

> I

prot

d

no

prn

MGE003

1996 Jan 03 6

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

Counter

With the counter, which is supplied with pulses with twice
the frequency of the mains supply, the preheat time for the
first preheat and (if necessary) the next six preheats is
defined.

Time select

Depending on the state of the counter a long (t
or a short (t

= 0.64 s) preheat time is selected.

prn

= 1.52 s)

prf

Number of starts counter

The number of starts are counted by a counter. After seven
ignition attempts the IC is brought into standby state.
In standby state the supply current (I

) is increased.

CC

Due to the increased current, the buffer capacitor C1 will
discharge faster when the starter is disconnected from the
mains. This makes it possible to automatically reset the
starter the moment a malfunctioning tube is replaced by a
new one.

Current protection

When the current through the sense resistor exceeds its
limit (I

), the switching device will be turned off. During

prot

the first few periods of conduction, the current protection is
disabled (disable time td) to ensure that transient currents
do not trigger the current protection. When the current has
exceeded its limit, the switching device is turned off and
the IC enters the standby state that prevents re-activating
the switching device. Only an interruption of the supply
voltage will reset the standby state.

Output driver

The output driver is capable of driving a low input current
trigger device as well as a device controlled by a gate.
During start-up the output is kept low to prevent turning on
the external switching device.

This has a minimal effect on the voltage division ratio,
since the voltage at the gate of the trigger device is low.
The output driver generates the current pulse, which is
necessary to activate the external switching device TH1.
This current pulse is synchronized with the voltage at pin 4
(V

). The switching device is triggered when Vin reaches

in

the V

level. In that way the current through resistors R1

ign

and R2 is a part of the current needed to activate the
switching device. If necessary, the current pulse is
delivered every half cycle of the mains voltage. When the
switching device must be turned off, the output driver is
capable of sinking the gate turn-off current of the switching
device.

It might be necessary to limit the current peaks, which flow
through the switching device at turn-on, resulting from
discharging the suppressor capacitor (C2). This can be
achieved using a resistor (R3).

G

ATE INPUT DEVICE

A typical application that uses a MOSFET is given in Fig.8.
In this circuit the resistive divider is connected to ground.
The output driver of the IC operates the same way as when
a trigger device is used. The output current pulse will
charge the gate of the MOSFET. As a result, the MOSFET
will be activated.

To keep the MOSFET conductive, a high ohmic pull-up
resistor is connected between the gate of the MOSFET
and the buffer capacitor C1. This is necessary, because
the output current is a pulse and not a continuous signal.
This pull-up resistor increases the current which is drawn
from the buffer capacitor. An internal zener diode in the IC
limits the voltage at the output (and thus at the gate of the
MOSFET) to a typical value of 6.8 V.

Both switching devices require the breakdown voltage
(V

(BR)AK

or V

) to be larger than the ignition voltage of

(BR)DS

the TL-lamp.

T

RIGGER DEVICE

A typical application that uses a low input current trigger
device (such as TN22) as switching device is given in
Fig.7. The resistive divider R1//R2 is not connected to
ground but to the gate of the trigger device.

1996 Jan 03 7

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

out

V

in

V

TEST

I

sense

P

tot

T

stg

T

amb

Notes

1. This pin is connected to an internal zener diode (typical working voltage is 6.8 V).

2. This pin is connected to an internal zener diode (working voltage between 130 and 230 V).
The current entering this pin must be limited to <10 mA.

3. Inrush current, duration <2 ms.

output voltage note 1 − 6V
input voltage note 2 − 125 V
voltage at test pin − 6V
current through sense resistor note 3 − 6A
total power dissipation − 395 mW
storage temperature non-operating −55 150 °C
ambient temperature operating −40 85 °C

QUALITY SPECIFICATION

In accordance with

“SNW-FQ-611-E”

with the following exception: With respect to the integrated sense resistor a lifetime
of 60000 lamp starts (with max. 7 start attempts) at maximum preheat current level of 1.4 A (RMS) is guaranteed.
The number of the quality specification can be found in the

“Quality Reference Handbook”

. The handbook can be ordered

using the code 9397 750 00192.

THERMAL CHARACTERISTICS

SYMBOL PARAMETER VALUE UNIT

R

th j-a

thermal resistance from junction to ambient in free air 160 K/W

CHARACTERISTICS

T

=25°C; all voltages referenced to GND; see application diagrams (Figs. 7 and 8); V

amb

= 220 V, 50 Hz; N is the

mains

number of ignition attempts; unless otherwise specified.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

IC voltages

V

CC(sl)

V

CC(rst)

V

ign

supply voltage start level 40 44 49 V
supply voltage reset level −−9V
ignition voltage striking switching device 67 − 97 V

Lamp voltages

V

lamp

TL-lamp voltage 50 − 140 V

Supply current

I

CC

supply current VCC= 30 V; note 1 − 32 42 µA

th

after 7

start attempt;

− 145 −µA

VCC=30V

I

c

control current note 2 − 170 −µA

1996 Jan 03 8

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Output stage

I

source

peak source current
(pulse shape Fig.6)

I

sink

t

W

Q

p

V

out

output sink current V
pulse width VCC=30V 5 −−µs
pulse charge VCC= 30 V; note 3 21 −−nC
output voltage I

Timing

t

prf

t

prn

t

ini

preheat time (first) N = 1; note 4 − 1.52 − s
preheat time (next) 2 ≤ N ≤ 7; note 5 − 0.64 − s
initial time − 125 − ms

Current protection

I

prot(m)

t

d

current protection level (peak value) 2.2 3.4 − A
delay time before current protection is

enabled

V

< 2 V; striking

out

1.5 − 10 mA

switching device

= 0.8 V 50 −−mA

out

= 0.5 mA; driving gate

sink

− 6.8 − V

device in preheat mode

note 6 − 70 − ms

Sense resistor

R

sense

internal sense resistor note 7 − 26 − mΩ

Preheat current

I

pr(rms)

preheat current (RMS value) note 8 0.33 − 1.4 A

Switching off current

I

so

preheat current level at the moment it
is switched off

Notes

1. When the switching device is triggered, ICC=I

source

.

2. This is the active current when the lamp is lit.

The given value is valid for V

= 115 V. The total

lamp

current at Vin equals: Iin=ICC+Ic (leakage currents
are neglected).

3. Qp=I

source

× tp.

4. Time is derived from the mains frequency; division

factor equals 76.

5. Time is derived from the mains frequency; division

factor equals 32.

6. The delay time is set by a clock signal, which is derived

from the current through the sense resistor. Due to
inrush transients of the preheat current, variation of t
is possible.

7. This is the resistance of the internal sense circuit

(excluding the bonding wires).

note 9 285 380 475 mA

8. To guarantee good functioning, a crest factor of at
least 1.5 is needed at low currents.

9. When the holding current of TH1 is lower than Iso, TH1
is switched off at the holding current (in case of a
trigger device).

handbook, halfpage

d

I

source

(mA)

3

tw = 7 µs

MGE008

Fig.6 Pulse shape (typical value).

1996 Jan 03 9

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

APPLICATION INFORMATION

handbook, full pagewidth

mains

supply

C1

3.3
µF

0.6 to 2 H

load

C

R3

TL-

LAMP

V

CC

64

S2

S1

I

CCIc

CIRCUIT

UBA2000T

2

GND

100 Ω

V

lamp

5.6 nF

100 kΩ

V

in

3

V

1

V

C2

R1

R2

62

kΩ

out

sense

D0

TH1
(i.e. TN22)

MGE004

Fig.7 Application diagram (with trigger device).

1996 Jan 03 10

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

handbook, full pagewidth

mains

supply

C1

3.3
µF

0.6 to 2 H

load

C

TL-

V

LAMP

R3

1 MΩ

V

CC

64

I

CCIc

CIRCUIT

lamp

V

S2

S1

UBA2000T

2

GND

C2

5.6 nF

in

3

V

out

1

V

sense

R1

R2

100

kΩ

62
kΩ

MOSFET

MGE005

Fig.8 Application diagram (with MOSFET device).

1996 Jan 03 11

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

PACKAGE OUTLINE

SO8: plastic small outline package; 8 leads; body width 3.9 mm

D

c

y

Z

8

pin 1 index

1

e

5

A

2

A

4

w M

b

p

SOT96-1

E

H

E

1

L

detail X

A

X

v M

A

Q

(A )

L

p

A

3

θ

0 2.5 5 mm

scale

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

mm

OUTLINE
VERSION

SOT96-1

A

max.

1.75

0.069

A

1

0.25

0.10

0.010

0.004

A2A

1.45

1.25

0.057

0.049

IEC JEDEC EIAJ

076E03S MS-012AA

0.25

0.01

b

3

p

0.49

0.25

0.36

0.19

0.019

0.0100

0.014

0.0075

UNIT

inches

Notes

1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.

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

(1)E(2)

cD

5.0

4.8

0.20

0.19

REFERENCES

4.0

3.8

0.16

0.15

1.27

0.050

1996 Jan 03 12

eHELLpQZywv θ

1.05

1.0

0.4

0.039

0.016

0.7

0.6

0.028

0.024

0.25 0.10.25

0.010.010.041 0.004

EUROPEAN

PROJECTION

6.2

5.8

0.244

0.228

(1)

0.7

0.3

0.028

0.012

ISSUE DATE

95-02-04
97-05-22

o

8

o

0

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

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”

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.

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.

(order code 9398 652 90011).

Wave soldering

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.

Repairing soldered joints

Fix the component by first soldering two diagonally­opposite 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.

1996 Jan 03 13

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

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.

1996 Jan 03 14

Philips Semiconductors Product specification

Electronic TL-lamp starter UBA2000T

NOTES

1996 Jan 03 15

Philips Semiconductors – a worldwide company

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th

floor, Suite 51,

Netherlands: Postbus 90050, 5600 PB EINDHOVEN, Bldg. VB,

Tel. [phone], Fax. [phone]

New Zealand: 2 Wagener Place, C.P.O. Box 1041, AUCKLAND,

Tel. [phone], Fax. [phone]

Norway: Box 1, Manglerud 0612, OSLO,

Tel. [phone], Fax. [phone]

Pakistan: Philips Electrical Industries of Pakistan Ltd.,

Exchange Bldg. ST-2/A, Block 9, KDA Scheme 5, Clifton,
KARACHI 75600, Tel. [phone],
Fax. [phone]

Philippines: PHILIPS SEMICONDUCTORS PHILIPPINES Inc.,

106 Valero St. Salcedo Village, P.O. Box 2108 MCC, MAKATI,
Metro MANILA, Tel. [phone], Fax. [phone]

Portugal: PHILIPS PORTUGUESA, S.A.,

Rua dr. António Loureiro Borges 5, Arquiparque - Miraflores,
Apartado 300, 2795 LINDA-A-VELHA,
Tel. [phone], Fax. [phone]

Singapore: Lorong 1, Toa Payoh, SINGAPORE 1231,

Tel. [phone], Fax. [phone]

South Africa: S.A. PHILIPS Pty Ltd.,

195-215 Main Road Martindale, 2092 JOHANNESBURG,
P.O. Box 7430, Johannesburg 2000,
Tel. [phone], Fax. [phone]

Spain: Balmes 22, 08007 BARCELONA,

Tel. [phone], Fax. [phone]

Sweden: Kottbygatan 7, Akalla. S-164 85 STOCKHOLM,

Tel. [phone], Fax. [phone]

Switzerland: Allmendstrasse 140, CH-8027 ZÜRICH,

Tel. [phone], Fax. [phone]

Taiwan: PHILIPS TAIWAN Ltd., 23-30F, 66, Chung Hsiao West

Road, Sec. 1. Taipeh, Taiwan ROC, P.O. Box 22978,
TAIPEI 100, Tel. [phone], Fax. [phone]

Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd.,

209/2 Sanpavuth-Bangna Road Prakanong,
Bangkok 10260, THAILAND,
Tel. [phone], Fax. [phone]

Turkey:Talatpasa Cad. No. 5, 80640 GÜLTEPE/ISTANBUL,

Tel. [phone], Fax. [phone]

Ukraine: Philips UKRAINE, 2A Akademika Koroleva str., Office 165,

252148 KIEV, Tel.[phone], Fax. [phone]

United Kingdom: Philips Semiconductors LTD.,

276 Bath Road, Hayes, MIDDLESEX UB3 5BX,
Tel. [phone], Fax. [phone]

United States:811 East Arques Avenue, SUNNYVALE,

CA 94088-3409, Tel. [phone], Fax. [phone]

Uruguay: Coronel Mora 433, MONTEVIDEO,

Tel. [phone], Fax. [phone]

Internet: http://www.semiconductors.philips.com/ps/
For all other countries apply to: Philips Semiconductors,

International Marketing and Sales, Building BE-p,
P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands,
Telex 35000 phtcnl, Fax. [phone]

SCDS47 © Philips Electronics N.V. 1996

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297021/1100/01/pp16 Date of release: 1996 Jan 03
Document order number: 9397 750 00547