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X1240 Datasheet(PDF) 15 Page - Xicor Inc. |
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X1240 Datasheet(HTML) 15 Page - Xicor Inc. |
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15 / 19 page 
X1240 15 AC SPECIFICATIONS (TA = -40˚C to +85˚C, VCC = +2.7V to +3.6V, unless otherwise specified.) Notes: (1) Typical values are for TA = 25˚C and VCC = 5.0V (2) This parameter is periodically sampled and not 100% tested. (3) Cb = total capacitance of one bus line in pF. TIMING DIAGRAMS Bus Timing Symbol Parameter Min Max Units fSCL SCL Clock Frequency 0 400 KHz tIN Pulse width Suppression Time at inputs 50 nS tAA SCL LOW to SDA Data Out Valid 0.1 0.9 µS tBUF Time the bus must be free before a new transmission can start 1.3 µS tLOW Clock LOW Time 1.3 µS tHIGH Clock HIGH Time 0.6 µS tSU:STA Start Condition Setup Time 0.6 µS tHD:STA Start Condition Hold Time 0.6 µS tSU:DAT Data In Setup Time 100 nS tHD:DAT Data In Hold Time 0 µS tSU:STO Stop Condition Setup Time 0.6 µS tDH Data Output Hold Time 50 nS tR SDA and SCL Rise Time 20 +.1Cb(3) 300 nS tF SDA and SCL Fall Time 20 +.1Cb(3) 300 nS Cb Capacitive load for each bus line 400 pF tSU:STO tDH tHIGH tSU:STA tHD:STA tHD:DAT tSU:DAT SCL SDA IN SDA OUT tF tLOW tBUF tAA tR |
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