t4225b ATMEL Corporation, t4225b Datasheet
t4225b
Related parts for t4225b
t4225b Summary of contents
Page 1
... Low-Cost Time-Code Receiver Description The T4225B is a bipolar integrated straight-through receiver circuit in the frequency range of 40 kHz to 80 kHz. The device is designed for radio-controlled clock applications. Features D Very low power consumption D Very high sensitivity D High selectivity by using two crystal filters D Power-down mode available ...
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... T4225B PAD Coordinates The T4225B is only available as die for “chip-on-board” mounting. DIE size: 2. PAD size: 100 x 100 m (contact window " Thickness: 300 Symbol Function IN1 Amplifier input (inverted) IN Amplifier input (non inverted) GND Ground SB Bandwidth control ...
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... DEC SB 94 8376 GND SL AGC hold mode: SL high (V function, SL low (V holds the voltage V the AGC amplifier gain. VCC 94 8378 T4225B 1 94 8374 REC GND Figure 6. GND Figure sets normal disconnects the rectifier and SL at the integrator output and also ...
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... T4225B INT Integrator output: The voltage V is the control voltage INT for the AGC. The capacitor C between INT and DEC 2 defines the time constant of the integrator. The current through the capacitor is the input signal of the decoder. INT GND Figure 9. FLA, FLB ...
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... V INT indicates the resonant point. But attention: The load current should not exceed 1 nA, that means an input w W resistance the measuring device is required. Therefore, a special DVM or an isolation amplifier is necessary. T4225B as close as possible to the res at Pin INT 5 (16) ...
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... T4225B Absolute Maximum Ratings Parameters Supply voltage Ambient temperature range Storage temperature range Junction temperature Electrostatic handling ( MIL Standard 883 D ), except Pad IN, Q1A, Q1B, Q2A, Q2B Electrical Characteristics reference point Pin 3, input signal frequency 80 kHz Parameters Test Conditions / Pin ...
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... 0 625 77.5 kHz T4225B Typ. Max. Unit 140 200 ms 440 500 ms 740 800 240 410 ms 420 490 ms 720 790 ms 10 110 ms 30 220 ...
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... T4225B Test Circuit (for Fundamental Function) Vd 1.657V 300k Stco Vtco T4225B Ivcc 100k V STABILISATION CC Iin IN1 1M IN GND Vin Vsb 8 (16) Test point: DVM with high and low input Ipon current lxx by conversion into a voltage. Spon 1M 82p TCO PON ...
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... Generator signal (e.g., 77.5 kHz Layout Rev. A3, 03-Dec-98 1.0 . The input signal W 0.9 0.8 0.7 2 0.6 1 0.5 – 11210 VCC – IN1 T4225B IN Figure 18. 95 10212 Figure 19. T4225B 100 Figure 17. INT V INT W (Ri > 11208 95 11213 9 (16) ...
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... FLB T4225B FLA DEC SB Q1A Q1B REC INT 6 77.5 kHz Figure 20. 60 kHz TCO PON Q2B Q2A SL FLB T4225B FLA DEC SB Q1A Q1B REC INT kHz Figure 21. Control lines TCO 3) PON Microcomputer 1) SL Keyboard ...
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... FLA DEC SB Q1A Q1B REC INT 220 kHz C 1 0.68 nF Figure 22. T4225B Control lines TCO 3) PON Microcomputer 1) SL Keyboard Display not used connected to VCC 2) 40-kHz crystal can be replaced activated, PON is ...
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... T4225B Information on the German Transmitter Station: DCF 77, Frequency 77.5 kHz, Transmitting power coding when required Example:19. seconds minutes Start Bit Modulation The carrier amplitude is reduced to 25% at the beginning of each second for a period of 100 ms (binary zero) or 200 ms (binary one), except the 59th second ...
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... The prescence of the fast code during the first 500 ms at the beginning of the minute is not guaranteed. The trans- mission rate is 100 bits/s and the code contains information of hour, minute, day and month. T4225B Time frame ...
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... T4225B Information on the US Transmitter Station: WWVB Frequency 60 kHz Transmitting power hours minutes Example: UTC 18.42 h Time frame seconds minutes Frame-reference marker Modulation The carrier amplitude is reduced the begin- ning of each second and is restored within 500 ms (binary one) or within 200 ms (binary zero) ...
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... Time-Code Format The time-code format consists of 1-minute time frames. A time frame contains BCD-coded information of minutes, hours and days. In addition, there are 6 position- identifier markers (P0 thru P5) and 1 frame-reference marker (FRM) with reduced carrier amplitude of 800 ms duration. T4225B Time frame ...
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... T4225B Ozone Depleting Substances Policy Statement It is the policy of TEMIC Semiconductor 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 ...