U4221B TEMIC Semiconductors, U4221B Datasheet
U4221B
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U4221B Summary of contents
Page 1
... Radio Controlled Clock Receiver Description The U4221B is a bipolar integrated straight through receiver circuit in the frequency range kHz. The device is designed for radio controlled clock application. Features D Low power consumption D Very high sensitivity D High selectivity by quartz resonator Block Diagram ...
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... GND IN1 PON TCO 4221 FSI 6 11 FSS 7507 e the U4221B receiver IC CCD, at this pin. If PON is connected to GND, the CCD m V, FSI will be high. TELEFUNKEN Semiconductors Rev. A1, 15-May-96 CCA CCD Datasheet pdf - http://www.DataSheet4U.net/ ...
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... The value of the resistor W should be 4 prevent an undefined output vol- tage in the power-down state of the U4221B, the use of this pull-up resistor is recommended. 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 2) ...
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... U4221B There is some consideration concerning the calculation res in order to achieve high signal voltage: R should be high res in order to achieve low antenna noise voltage: R should be low res R < 200 k : res W the input noise voltage dominates R > 300 k : res W the antenna noise voltage dominates ...
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... V LOAD CCD TCO CCD/2 SOURCE TCO CCD/2 SINK t 100 t 200 Pin 14 Generator output resistance v W 200 k Preliminary Information U4221B Value Unit 5 – – 125 C 2000 V Value Unit 70 K amb Min. Typ. Max. ...
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... U4221B Electrical Characteristics Parameters FIELD STRENGTH INDICATION; FSI Output voltage HIGH LOW Output current HIGH LOW FIELD STRENGTH SELECT; FSS Input voltage HIGH LOW Test Circuit for DCF Measurement point 77,5 kHz 100 Generator 50 100 (with variable output level) Modulation depth ...
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... U 4221 4221 Preliminary Information U4221B CONTROL LINES PON MICROCOMPUTER TCO KEYBOARD DISPLAY CONTROL LINES PON MICROCOMPUTER TCO KEYBOARD DISPLAY 93 7504 e 94 7906 e 7 (12) Datasheet pdf - http://www.DataSheet4U.net/ ...
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... U4221B Information Regarding German Transmitter Station: DCF 77, Frequency 77.5 kHz, Transmitting power coding when required Example:19. sec Start Bit 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 ...
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... 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. Preliminary Information U4221B _ _ 22’N, 01 11’W TIME FRAME ...
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... U4221B Information Regarding US Transmitter Station: WWVB Frequency 60 kHz Transmitting power minutes hours Example: UTC 18. seconds Frame reference marker Modulation: The carrier amplitude is reduced at the beginning of each second and is restored in 500 ms (binary one 200 ms (binary zero) ...
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... Ordering and Package Information Extended Type Number U4221B-BFP U4221B-BFPG1 Package: SO16 TELEFUNKEN Semiconductors Rev. A1, 15-May-96 Package SO16 plastic SO16 plastic Taping according to IEC-286-3 Preliminary Information U4221B Remarks 11 (12) Datasheet pdf - http://www.DataSheet4U.net/ ...
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... U4221B 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 ...