U2741B-MFB Atmel, U2741B-MFB Datasheet
U2741B-MFB
Specifications of U2741B-MFB
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U2741B-MFB Summary of contents
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... U2741B Encoder M44Cx9x Keys XTO Order Information Extended Type Number U2741B-MFB U2741B-MFBG3 U2741B-NFB U2741B-NFBG3 Rev. A2, 22-Dec-00 450 MHz. It can be used in both FSK and ASK systems. Electrostatic sensitive device. Observe precautions for handling. D XTO output for clocking the mC, thereby together with M44C090 or M44C890 the optimum system ...
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... PWRVCC 15 PWRSET 16 DIVIC OR Power up PA VCO XTO n U2741B Figure 3. Block diagram Function ASK Modulation input ASK FSK Modulation input FSK VCC Supply voltage CLK Clock output Ground Supply voltage VCO VCO ground LF Circuit PLL loop FM modulation output Connection for crystal ...
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... A typical value is LFeed = 220 nH. LFeed can be either printed on the PC_Board discrete component. Further information regarding the application is provided in the description of the “RKE Design Kit (U2741B, U3741B)” in chapter 2.2.2. This chapter labeled “Application Hints U2741B” also describes the antenna design in more detail. ...
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... Absolute Maximum Ratings Parameters Supply voltage Power dissipation Junction temperature Storage temperature Ambient temperature Thermal Resistance Parameters Junction ambient 4 ( Power up 3 VCO XTO U2741B 8 Figure 5. Application circuit Symbol tot stg T amb Symbol R thJA +V = 2.0...5.5V S DIVC 16 PWRSET CLoop2 15 R PWRSET PWRVCC 14 ...
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... 6.78 MHz amb f XTO 6.78 MHz f XTO B Loop PN PLL PN VCO PN VCO f VCO Clk out U2741B = – +85 C (Typ amb Min. Typ. Max. 0.35 4.7 6.2 10 12.5 1 –0 –1.5 –4.0 –5.5 1.5 V – 0 –40 –58 13.56 13.56 13.56 – ...
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... U2741B Electrical Characteristics (continued) All parameters are refered to GND (Pin 5). The possible operating ranges refer to different circuit conditions 2 5 – + amb Parameters Load capacitance at CLK Series resonance R of the f = 13.56 MHz XTO crystal f = 9.84 MHz XTO f = 6.78 MHz XTO f = 4.90 MHz ...
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... Data sheets can also be retrieved from the Internet: Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423 Rev. A2, 22-Dec-00 U2741B http://www.atmel–wm.com 7 (7) ...