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TRF4903PWR Datasheet(PDF) 8 Page - Texas Instruments |
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TRF4903PWR Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 26 page  TRF4903 SINGLECHIP MULTIBAND RF TRANSMITTER SWRS023B − MAY 2004 − REVISED MARCH 2005 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 ac electrical characteristics, VCC = 2.7 V, TA = 25°C (continued) XTAL PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Frequency range 9.5 20 MHz brownout detector PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Voltage threshold, Vdet Set by B<2:1> 2.2 2.8 V Voltage steps ( ∆V) 200 mV Number of steps 4 Output level Connected to typical input port of microcontroller CMOS timing data for serial interface PARAMETER MIN TYP MAX UNIT f(CLOCK) Clock frequency 20 MHz tw(CLKHI) Clock high-time pulse width, clock high 20 ns tw(CLKLO) Clock low-time pulse width, clock low 20 ns tsu(D) Setup time, data valid before CLOCK ↑ 0 ns th(D) Hold time, data valid after CLOCK ↑ 10 ns td(CLKLO) Delay time of CLOCK low before STROBE high 20 ns tw(STROBEHI) STROBE high-time pulse width, STROBE high 20 ns tw(STROBELO) STROBE low-time pulse width, STROBE low 20 ns STROBE t su(D) Data Valid Data Change DATA CLOCK th(D) t w(CLKHI) t w(CLKLO) Clock Disabled Store Data Shift in Data t w(STROBEHI) −V H −V L t d(CLKLO) t r t f MSB LSB MSB Start of Next Word Strobe Enabled Clock Enabled −V H −V L −V H −V L Note: Most significant bit (MSB) clocked in first to the synthesizer. tw(STROBELOW) Figure 2. Timing Data for Serial Interface |
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