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LS7211 Datasheet(PDF) 4 Page - LSI Computer Systems |
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LS7211 Datasheet(HTML) 4 Page - LSI Computer Systems |
4 / 8 page A 1 2 B TRIG 18 CLOCK/RC/XTLI 4 XTLO(LS7212) 5 5 RCS/CLKS(LS7211) 6 PSCLS 1M 1M OSC MUX 3-STATE DECODER CLOCK LATCH EDGE DETECT MODE REG CONTROL LOGIC LATCH/TIMER PRESCALER 500K 8 BUF 9 10-17 OUT WB7-WB0 FIGURE 2. LS7211/LS7212 BLOCK DIAGRAM 500K 500K 500K 500K (8) 3 8 +V -V (Gnd) +V +V + V VDD VSS 7 RESET 500K ELECTRICAL CHARACTERISTICS (Voltages referenced to Vss) (Con’t) Characteristic SYMBOL VDD Unit Condition Min Max Min Max Min Max Switching Characteristics (See Fig. 3) 4.0 - 1.3 - 1.0 - 0.76 MHz RC Oscillator Frequency fosc 10.0 - 4.0 - 3.0 - 2.3 MHz - 18.0 - 6.0 - 4.5 - 3.4 MHz 4.0 - 2.3 - 1.8 - 1.3 MHz For prescale External Clock or fext 10.0 - 7.0 - 5.5 - 4.0 MHz factor S = 1 or 3000 Crystal Oscillator 18.0 - 11.0 - 8.5 - 6.5 MHz or 3600 Frequency 4.0 - 1.2 - 0.93 - 0.7 MHz S = 32768 fext 10.0 - 4.0 - 3.0 - 2.3 MHz or 18.0 - 7.0 - 5.5 - 4.2 MHz 32768 X 60 TRIG Set-Up Time t1 - 23 - 30 - 40 - ns - A, B Set-Up Time t2 - 0 - 0 - 0 - ns - WB0 - WB7 Set-Up Time t3 - 0 - 0 - 0 - ns - 4.0 215 - 280 - 370 - ns Clock to Out Delay t4 10.0 80 - 105 - 140 - ns CL = 50pF 18.0 50 - 65 - 85 - ns |
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Similar Description - LS7211 |
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