U4224B-CFLG3 [TEMIC]
Time Code Receiver; 时间码接收机
| 型号： | U4224B-CFLG3 |
| 厂家： | 
TEMIC SEMICONDUCTORS |
| 描述： | Time Code Receiver |
| 文件： | 总17页 (文件大小：226K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
U4224B
Time Code Receiver
Description
The U4224B is a bipolar integrated straight through receiver circuit in the frequency range of 40 to 80 kHz.
The device is designed for radio controlled clock applications.
Features
Very low power consumption
Only a few external components necessary
Digitalized serial output signal
AGC hold mode
Very high sensitivity
High selectivity by using two crystal filters
Power down mode available
Block Diagram
PON
15
TCO
93 7727 e
16
11
3
GND
FLB
Decoder
10
Power Supply
1
V
CC
FLA
9
DEC
12
AGC
Amplifier
Rectifier &
Integrator
SL
2
IN
4
5
6
13 14
7
8
SB
Q1A
Q1B Q2A Q2B
REC
INT
TELEFUNKEN Semiconductors
1 (17)
Rev. A3, 02-Apr-96
U4224B
Pin Description
Pin
Symbol
Function
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
TCO
PON
Q2B
Q2A
SL
V
CC
SO 16 L
IN
1
2
V
CC
Supply voltage
IN
Amplifier – Input
Ground
GND
SB
3
GND
SB
4
Bandwidth control
Crystal filter 1
Crystal filter 1
Rectifier output
Integrator output
Decoder input
U4224B
5
Q1A
Q1B
REC
INT
DEC
FLA
FLB
SL
Q1A
Q1B
REC
INT
6
FLB
FLA
DEC
7
8
9
10
11
12
13
14
15
16
Low pass filter
Low pass filter
AGC hold mode
Crystal filter 2
Crystal filter 2
Power ON/OFF control
Time code output
93 7729 e
Q2A
Q2B
PON
TCO
IN
SB
A resistor R is connected between SB and GND. It con-
trols the bandwidth of the crystal filters. It is
A ferrite antenna is connected between IN and V . For
SB
CC
high sensitivity the Q of the antenna circuit should be as
high as possible, but a high Q often requires temperature
compensation of the resonant frequency. Specifications
are valid for Q > 30. An optimal signal to noise ratio will
be achieved by a resonant resistance of 50 to 200 k .
recommended: R = 0
for DCF 77.5 kHz, R
=
SB
SB
10 k for 60 kHz WWVB and R = open for JG2AS
SB
40 kHz.
94 8381
VCC
IN
SB
GND
94 8379
2 (17)
TELEFUNKEN Semiconductors
Rev. A3, 02-Apr-96
U4224B
Q1A, Q1B
SL
In order to achieve a high selectivity, a crystal is con-
nected between the pins Q1A and Q1B. It is used with the
serial resonance frequency of the time code transmitter
(e.g. 60 kHz WWVB, 77.5 kHz DCF or 40kHz JG2AS).
AGC hold mode: SL high (V = V ) sets normal func-
SL
CC
tion, SL low (V = 0) disconnects the rectifier and holds
SL
the voltage V
at the integrator output and also the AGC
INT
amplifier gain.
The equivalent parallel capacitor of the filter crystal is
internally compensated. The compensated value is about
0.7 pF. If the full sensitivity and selectivity is not needed,
the crystal filter can be substituted by a capacitor of 10 pF
for DCF and WWVB and 22 pF for JG2AS.
V
CC
SL
94 8378
Q1B
Q1A
GND
94 8382
INT
Integrator output: The voltage V
is the control voltage
INT
REC
for the AGC. The capacitor C2 between INT and DEC
defines the time constant of the integrator. The current
through the capacitor is the input signal of the decoder.
Rectifier output and integrator input: The capacitor C1
between REC and INT is the lowpass filter of the rectifier
and at the same time a damping element of the gain
control.
94 8375
94 8374
INT
REC
GND
GND
DEC
FLA, FLB
Decoder input: Senses the current through the integration
capacitor C2. The dynamic input resistance has a value of
about 420k and is low compared to the impedance of
C2.
Lowpass filter: A capacitor C3 connected between FLA
and FLB supresses higher frequencies at the trigger
circuit of the decoder.
DEC
FLB
FLB
GND
94 8377
94 8376
TELEFUNKEN Semiconductors
3 (17)
Rev. A3, 02-Apr-96
U4224B
An additional improvement of the driving capability may
be achieved by using a CMOS driver circuit or a NPN
transistor with pull-up resistor connected to the collector
(see figure KEIN MERKER). Using a CMOS driver this
Q2A, Q2B
According to Q1A, Q1B a crystal is connected between
the pins Q2A and Q2B. It is used with the serial resonance
frequency of the time code transmitter (e.g. 60 kHz
WWVB, 77.5 kHz DCF or 40 kHz JG2AS). The equi-
valent parallel capacitor of the filter crystal is internally
compensated. The value of the compensation is about
0.7 pF.
circuit must be connected to V
.
CC
V
CC
10 k
100 k
TCO
pin16
TCO
94 8395 e
Q2A
Q2B
Figure 1.
GND
94 8383
Please note:
The signals and voltages at the pins REC, INT, FLA, FLB,
Q1A, Q1B, Q2A and Q2B cannot be measured by stan-
dard measurement equipment due to very high internal
impedances. For the same reason the PCB should be pro-
tected against surface humidity.
PON
If PON is connected to GND the U 4224 B receiver IC
will be activated. The set-up time is typical 0.5s after
applying GND at this pin. If PON is connected to V , the
receiver will go into power down mode.
,
Design Hints for the Ferrite Antenna
CC
The bar antenna is a very critical device of the complete
clock receiver. But by observing some basic RF design
knowledge, no problem should arise with this part. The IC
requires a resonance resistance of 50 k to 200 k . This
can be achieved by a variation of the L/C-relation in the
antenna circuit. But it is not easy to measure such high
resistances in the RF region. It is much more convenient
to distinguish the bandwidth of the antenna circuit and
afterwards to calculate the resonance resistance.
V
CC
PON
94 8373
Thus the first step in designing the antenna circuit is to
measure the bandwidth. Figure 4 shows an example for
the test circuit. The RF signal is coupled into the bar
antenna by inductive means, e.g. a wire loop. It can be
measured by a simple oscilloscope using the 10:1 probe.
The input capacitance of the probe, typically about 10 pF,
should be taken into consideration. By varying the
frequency of the signal generator, the resonance
frequency can be determined.
TCO
The digitized serial signal of the time code transmitter can
be directly decoded by a microcomputer. Details about
the time code format of several transmitters are described
separately.
The output consists of a PNP NPN push-pull-stage. It
should be taken into account that in the power down mode
(PON = high) TCO will be high.
RF - Signal
Scope
generator
77.5 kHz
V
CC
Probe
PON
TCO
10 : 1
10 M
C
res
wire loop
94 7907 e
94 8380
GND
4 (17)
TELEFUNKEN Semiconductors
Rev. A3, 02-Apr-96
U4224B
Afterwards, the two frequencies where the voltage of the problem if the bandwidth of the antenna circuit is low
rf signal at the probe drops 3 dB down can be measured. compared to the temperature variation of the resonance
The difference between these two frequencies is called frequency. Of course, Q can also be reduced by a parallel
the bandwidth BW of the antenna circuit. As the value resistor.
A
of the capacitor C in the antenna circuit is well known,
it is easy to compute the resonance resistance according
to the following formula:
res
Temperature compensation of the resonance frequency is
a must if the clock is used at different temperatures.
Please ask your dealer of bar antenna material and of ca-
pacitors for specified values of temperature coefficient.
1
Rres
2
BWA Cres
Furthermore some critical parasitics have to be consid-
ered. These are shortened loops (e.g. in the ground line of
the PCB board) close to the antenna and undesired loops
in the antenna circuit. Shortened loops decrease Q of the
circuit. They have the same effect like conducting plates
close to the antenna. To avoid undesired loops in the
antenna circuit it is recommended to mount the capacitor
whereas
is the resonance resistance,
R
res
BW is the measured bandwidth (in Hz)
A
C
res
is the value of the capacitor in the antenna circuit
(in Farad)
If high inductance values and low capacitor values are
used, the additional parasitic capacitances of the coil
must be considered. It may reach up to about 20 pF. The
Q-value of the capacitor should be no problem if a high
Q-type is used. The Q-value of the coil is more or less
distinguished by the simple DC-resistance of the wire.
Skin effects can be observed but do not dominate.
C
res
as close as possible to the antenna coil or to use a
twisted wire for the antenna coil connection. This twisted
line is also necessary to reduce feedback of noise from the
microprocessor to the IC input. Long connection lines
must be shielded.
A final adjustment of the time code receiver can be done
Therefore it shouldn’t be a problem to achieve the recom- by pushing the coil along the bar antenna. The maximum
mended values of resonance resistance. The use of thicker of the integrator output voltage V at pin INT indicates
INT
wire increases Q and accordingly reduces bandwidth. the resonant point. But attention: The load current should
This is advantageous in order to improve reception in not exceed 1 nA, that means an input resistance 1 G
noisy areas. On the other hand, temperature compen- of the measuring device is required. Therefore a special
sation of the resonance frequency might become a DVM or an isolation amplifier is necessary.
Absolute Maximum Ratings
Parameters
Symbol
V
CC
Value
5.25
Unit
V
Supply voltage
Ambient temperature range
Storage temperature range
Junction temperature
T
R
T
–25 to +75
–40 to +85
125
C
C
C
amb
stg
j
Electrostatic handling
± V
2000
V
ESD
(MIL Standard 883 D), excepted pins 5, 6, 13 and 14
Thermal Resistance
Parameters
Symbol
R
thJA
Value
70
Unit
K/W
Thermal resistance
TELEFUNKEN Semiconductors
5 (17)
Rev. A3, 02-Apr-96
U4224B
Electrical Characteristics
V
CC
= 3 V, reference point pin 3, input signal frequency 80 kHz, T
= 25 C, unless otherwise specified
amb
Parameters
Supply voltage range
Supply current
Test Conditions / Pin
pin 1
pin 1
without reception signal
with reception signal = 200 V
OFF-mode
Symbol
Min.
1.2
Typ.
Max.
5.25
Unit
V
V
CC
CC
I
30
25
0.1
A
A
A
15
2
Set-up time after V ON
V
CC
= 1.5 V
pin 2
t
s
CC
AGC AMPLIFIER INPUT; IN
Reception frequency range
f
V
V
C
40
40
80
1.5
kHz
V
mV
pF
in
Minimum input voltage
Maximum input voltage
Input capacitance to ground
R
res
= 100 k , Q > 30
1
80
1.5
res
in
in
in
TIMING CODE OUTPUT; TCO
pin 16
Output voltage
HIGH
LOW
R
LOAD
R
LOAD
= 870 k to GND
V
V
V -0.4
CC
V
V
OH
= 650 k to V
0.4
CC
OL
Output current
HIGH
LOW
V
TCO
V
TCO
= V /2
I
3
4
10
12
CC
SOURCE
= V /2
I
CC
SINK
Decoding characteristics
DCF77 based on the values of
the application circuit
page KEIN MERKER:
TCO pulse width 100 ms
TCO pulse width 200 ms
t
t
60
160
90
190
130
230
ms
ms
100
200
Delay compared with the
transient of the RF signal:
t
30
25
60
55
ms
ms
s
drop down (start transition)
rise for 100 ms pulse
(end transition)
t
e1
t
e2
10
30
ms
rise for 200 ms pulse
(end transition)
Decoding characteristics
WWVB based on the values of
the application circuit
page KEIN MERKER:
TCO pulse width 200 ms
TCO pulse width 500 ms
TCO pulse width 800 ms
t
t
t
140
440
740
200
500
800
ms
ms
ms
200
500
800
Delay compared with the
transient of the RF signal:
t
45
20
80
45
ms
ms
s
drop down (start transition)
rise (end transition)
t
e
6 (17)
TELEFUNKEN Semiconductors
Rev. A3, 02-Apr-96
U4224B
Parameters
Test Conditions / Pin
Symbol
Min.
Typ.
Max.
Unit
Decoding characteristics
JG2AS based on the values of
the application circuit
page KEIN MERKER:
TCO pulse width 200 ms
TCO pulse width 500 ms
TCO pulse width 800 ms
t
t
t
240
420
720
410
490
790
ms
ms
ms
200
500
800
Delay compared with the
transient of the RF signal:
start transition (RF on)
end transition (RF off)
t
10
30
110
220
ms
ms
s
t
e
POWER ON/OFF CONTROL; PON pin 15
Input voltage
HIGH
LOW
Required I
0.5 A
IN
V
V
-0.2
V
V
A
A
A
CC
V
-1.2
CC
2
Input current
V
CC
V
CC
V
CC
= 3V
= 1.5 V
= 5 V
I
1.4
1.7
0.7
3
IN
Set-up time after PON
AGC HOLD MODE; SL
Input voltage
HIGH
LOW
t
0.5
2
s
pin 12
Required I
0.5 A
IN
-0.2
V
V
CC
V
CC
-1.2
Input current
Vin = V
Vin = GND
0.1
A
A
CC
2.5
Rejection of interference
signals
f – f = 625 Hz
d
ud
V = 3 V, f = 77.5 kHz
d
d
using 2 crystal filters
using 1 crystal filter
a
f
a
f
43
22
dB
dB
TELEFUNKEN Semiconductors
7 (17)
Rev. A3, 02-Apr-96
U4224B
Test Circuit (for Fundamental Function)
Test point: DVM with high and low input
line for measuring of a voltage Vxx or a
current lxx by conversion into a voltage.
Ipon
Vd
1.657V
300k
Stco
Spon
1M
1M
82p
Vtco
Isl
Ssl
TCO
Q2A
PON
Q2B
U4224B
SL
10M
100k
Ivcc
Sdec
FLB
V
STABILISATION
CC
DECODING
RECTIFIER
Iin
Idec
FLA
DEC
AGC-
AMPLIFIER
100M
1M
Vdec
IN
Q1A
Q1B
REC
GND
SB
INT
VCC
3 V
~
82p
680p 3.3 n 420k
Srec
Vin
Vrec
Ssb
Sint
10M
10M
Irec
Vsb
Vint
1M
Vrec
Vint
Isb
Iint
94 8384 e
8 (17)
TELEFUNKEN Semiconductors
Rev. A3, 02-Apr-96
U4224B
Application Circuit for DCF 77.5 kHz
CONTROL LINES
+ V
CC
Ferrite Antenna
= 77.5 kHz
1
2
3
4
5
16
15
f
res
TCO
MICROCOMPUTER
3)
PON
14
77.5 kHz
13
1)
SL
KEYBOARD
U4224B
12
2)
77.5 kHz
DISPLAY
11
C
6
7
8
3
10 nF
10
C
1
1)
If SL is not used, SL is connected to V
77.5 kHz crystal can be replaced by 10 pF
If IC is activated, PON is connected to GND
CC
2)
3)
9
6.8 nF
C
2
33 nF
94 8279 e
Application Circuit for WWVB 60 kHz
CONTROL LINES
+ V
CC
Ferrite Antenna
= 60 kHz
1
2
3
4
5
16
15
f
res
TCO
MICROCOMPUTER
3)
PON
14
60 kHz
13
1)
SL
RSB
10 k
KEYBOARD
U4224B
12
11
10
2)
60 kHz
DISPLAY
6
7
8
C
3
10 nF
C
1
1)
2)
3)
If SL is not used, SL is connected to V
60 kHz crystal can be replaced by 10 pF
If IC is activated, PON is connected to GND
CC
9
15 nF
C
2
47 nF
94 8278 e
TELEFUNKEN Semiconductors
9 (17)
Rev. A3, 02-Apr-96
U4224B
Application Circuit for JG2AS 40 kHz
CONTROL LINES
+ V
CC
Ferrite Antenna
= 40 kHz
1
2
3
4
5
16
15
f
res
TCO
MICROCOMPUTER
3)
PON
14
40 kHz
1)
SL
13
12
11
10
KEYBOAR
U4224B
2)
40 kHz
DISPLAY
6
7
8
C
3
10 nF
C
1
1)
2)
3)
If SL is not used, SL is connected to V
40 kHz crystal can be replaced by 22 pF
If IC is activated, PON is connected to GND
CC
C
2
680 pF
1 M
9
R
220 nF
94 7724 e
10 (17)
TELEFUNKEN Semiconductors
Rev. A3, 02-Apr-96
U4224B
PAD Coordinates
The T4224B is the die version of the U4224B.
DIE size:
PAD size:
2.26 x 2.09 mm
100 x 100 m (contact window 88 x 88 m)
Thickness: 300 m 20 m
Symbol
IN1
x-axis/ m
128
y-axis/ m
758
Symbol
FLA
FLB
SL
x-axis/ m
2044
2044
2044
1980
1634
1322
1008
128
y-axis/ m
676
IN
128
310
1012
1624
1876
1876
1876
1876
1098
GND
SB
354
124
698
128
Q2A
Q2B
PON
TCO
VCC
Q1A
Q1B
REC
INT
1040
1290
1528
1766
2044
128
128
128
128
DEC
268
The PAD coordinates are referred to the left bottom point
of the contact window.
PAD Layout
Q2B
Q2A
SL
TCO
PON
VCC
IN1
FLB
FLA
T4224B
IN
DEC
y-axis
GND
REC
Q1A
Q1B
INT
SB
94 8892
x-axis
Reference point (0/0)
TELEFUNKEN Semiconductors
11 (17)
Rev. A3, 02-Apr-96
U4224B
Information Regarding German Transmitter
Station: DCF 77,
Location: Mainflingen/Germany,
Frequency 77.5 kHz,
Transmitting power 50 kW
Geographical coordinates: 50
Time of transmission: permanent
0.1’N, 09
00’E
Time Frame 1 Minute
Time Frame
( index count 1 second )
0
40
55
5
10
20
35
45
50
10
5
15
25
30
0
calendar
day
coding
when
required
minutes
hours
day month
year
of
the
week
93 7527
Example:19.35 h
20
2
8
10 20
10
40
4
P2
s
1
2
4
8
P1
1
sec. 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
minutes
hours
Start Bit
Parity Bit P1
Parity Bit P2
beginning of the 59th second to recognize the switch over
to the next 1 minute time frame. A time frame contains
BCD–coded information of minutes, hours, calendar day,
day of the week, month and year between the 20th second
and 58th second of the time frame, including the start bit
S (200 ms) and parity bits P1, P2 and P3. Further there are
5 additional bits R (transmission by reserve antenna), A1
(announcement of change–over to the summer time), Z1
(during the summer time 200 ms, otherwise 100 ms), Z2
(during standard time 200 ms otherwise 100 ms) and A2
(announcement of leap second) transmitted between the
Modulation:
The carrier amplitude is reduced to 25 % at the beginning
of each second for 100 ms (binary zero) or 200 ms (binary
one) duration, excepting the 59th second.
Time Code Format: (based on in-
formation of Deutsche Bundespost)
It consists of 1 minute time frames. No modulation at the 15th second and 19th second of the time frame.
12 (17)
TELEFUNKEN Semiconductors
Rev. A3, 02-Apr-96
U4224B
Information Regarding British Transmitter
Station: MSF
Frequency 60 kHz
Transmitting power 50 kW
Location: Teddington, Middlesex
Geographical coordinates: 52
22’N, 01 11’W
Time of transmission: permanent, excepting the first tues-
day of each month from 10.00 h to 14.00 h.
TIME FRAME 1 MINUTE
TIME FRAME
10
( index count 1 second)
10
35
45
50
55
0
5
15
20
25
30
40
0
5
month day of
month
minute
year
hour
minute
day
of
week
identifier
switch over to
the next time frame
BST
Parity
check
bits
hour + minute
day of week
day + month
year
BST 7 GMT change
impending
1
0
500 ms 500 ms
93 7528
Example:
March 1993
8
40
20
8
4
2
10
4
1
80
10
1
2
seconds 17
19
23
27
month
21
year
25
30
18
20
22
24
26
28
29
Modulation:
Time Code Format:
It consists of 1 minute time frames. A time frame contains
BCD–coded information of year, month, calendar day,
day of the week, hours and minutes. At the switch–over
to the next time frame, the carrier amplitude is reduced for
500 ms duration.
The carrier amplitude is switched off at the beginning of
each second for the time of 100 ms (binary zero) or 200
ms (binary one).
The prescence of the fast code during the first 500 ms at
the beginning of the minute in not guaranteed. The trans-
mission rate is 100 bits/s and the code contains
information of hour, minute, day and month.
TELEFUNKEN Semiconductors
13 (17)
Rev. A3, 02-Apr-96
U4224B
Information Regarding US Transmitter
Station: WWVB
Location: Fort Collins
Frequency 60 kHz
Geographical coordinates: 40
40’N, 105
03’W
Transmitting power 10 kW
Time of transmission: permanent.
TIME FRAME 1 MINUTE
TIME FRAME
10
( index count 1 second)
35
30
5
10
15
20
25
40
50
55
0
0
45
5
daylight savings time bits
leap second warning bit
leap year indicator bit
”0” = non leap year
”1” = leap year
days
hours
minutes
UTI
UTI
year
sign correction
93 7529 e
Example: UTC 18.42 h
TIME FRAME
P0
40 20
8
4
2
1
P1
20 10
8
4
2
1
P2
10
4
seconds0
12
16
13 14 15 17 18 19 20
1
3
5
8
9 11
10
2
6
7
minutes
Frame reference marker
hours
Modulation:
Time Code Format:
It consists of 1 minute time frames. A time frame contains
BCD–coded information of minutes, hours, days and
year. In addition there are 6 position identifier markers
(P0 thru P5) and 1 frame reference marker with reduced
carrier amplitude of 800 ms duration.
The carrier amplitude is reduced 10 dB at the beginning
of each second and is restored in 500 ms (binary one) or
in 200 ms (binary zero).
14 (17)
TELEFUNKEN Semiconductors
Rev. A3, 02-Apr-96
U4224B
Information Regarding Japanese Transmitter
Station: JG2AS
Frequency 40 kHz
Transmitting power 10 kW
Location: Sanwa, Ibaraki
Geographical coordinates: 36 11’ N, 139 51’ E
Time of transmission: permanent
Time Frame 1 Minute
(index count 1 second)
Time Frame
10
0
5
10
15
20
25
30
35
40
45
50
55
0
5
minutes
hours
days
code dut1
Example: 18.42 h
P0
Time Frame
8
P2
1
40 20 10
4
2
1
P1
20 10
8
4
2
sec.
0
59
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20
minutes
hours
frame reference marker (FRM)
position identifier marker P0
position identifier marker P1
0.5 second: Binary one
0.8 second: Binary zero
0.2 second: Identifier markers P0...P5
0.2 s
”P”
0.8 s
”0”
0.5 s
93 7508 e
”1”
Modulation:
Time Code Format:
It consists of one minute time frame. A time frame con-
tains BCD–coded information of minutes, hours and
days. In addition there are 6 position identifier markers
(P0 thruP5) and one frame reference markers (FRM) with
reduced carrier amplitude of 800 ms duration.
The carrier amplitude is 100% at the beginning of each se-
cond and is switched off after 500 ms (binary one) or after
800 ms (binary zero).
Ordering and Package Information
Extended type number
Package
Remarks
U4224B-CFL
U4224B-CFLG3
T4224B-CF
SO 16 L plastic
SO 16 L plastic
Taping according to IEC–286–3
die on foil
no
no
T4224B-CC
die on tray
TELEFUNKEN Semiconductors
15 (17)
Rev. A3, 02-Apr-96
U4224B
Dimensions in mm
Package: SO 16 L
94 8961
16 (17)
TELEFUNKEN Semiconductors
Rev. A3, 02-Apr-96
U4224B
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of
continuous improvements to eliminate the use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain
such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
TELEFUNKEN Semiconductors
17 (17)
Rev. A3, 02-Apr-96
相关型号：
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