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CY74FCT138CTQCT Datasheet(PDF) 5 Page - Texas Instruments |
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CY74FCT138CTQCT Datasheet(HTML) 5 Page - Texas Instruments |
5 / 7 page CY54FCT138T, CY74FCT138T 1-OF-8 DECODERS SCCS013B – MAY 1994 – REVISED OCTOBER 2001 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS CY54FCT138T CY74FCT138T UNIT PARAMETER TEST CONDITIONS MIN TYP† MAX MIN TYP† MAX UNIT # VCC = 5.5 V, Outputs open, Switch E1 E2 or One output switching at f1 = 10 MHz VIN ≤ 0.2 V or VIN ≥ VCC – 0.2 V 0.7 1.4 IC# Switch E1, E2, or E3 1 at 50% duty cycle VIN = 3.4 V or GND 1 2.4 mA IC# VCC = 5.25 V, Outputs open, Switch E1 E2 or One output switching at f1 = 10 MHz VIN ≤ 0.2 V or VIN ≥ VCC – 0.2 V 0.7 1.4|| mA Switch E1, E2, or E3 1 at 50% duty cycle VIN = 3.4 V or GND 1 2.4|| Ci 5 10 5 10 pF Co 9 12 9 12 pF † Typical values are at VCC = 5 V, TA = 25°C. # IC = ICC + ∆ICC × DH × NT + ICCD (f0/2 + f1 × N1) Where: IC = Total supply current ICC = Power-supply current with CMOS input levels ∆ICC = Power-supply current for a TTL high input (VIN = 3.4 V) DH = Duty cycle for TTL inputs high NT = Number of TTL inputs at DH ICCD = Dynamic current caused by an input transition pair (HLH or LHL) f0 = Clock frequency for registered devices, otherwise zero f1 = Input signal frequency N1 = Number of inputs changing at f1 All currents are in milliamperes and all frequencies are in megahertz. || Values for these conditions are examples of the ICC formula. switching characteristics over operating free-air temperature range (see Figure 1) PARAMETER FROM TO CY54FCT138T CY54FCT138CT UNIT PARAMETER (INPUT) (OUTPUT) MIN MAX MIN MAX UNIT tPLH A O 1.5 12 1.5 6 ns tPHL A O 1.5 12 1.5 6 ns tPLH E E O 1.5 12.5 1.5 6.1 ns tPHL E1 or E2 O 1.5 12.5 1.5 6.1 ns tPLH E3 O 1.5 12.5 1.5 6.1 ns tPHL E3 O 1.5 12.5 1.5 6.1 ns switching characteristics over operating free-air temperature range (see Figure 1) PARAMETER FROM TO CY74FCT138T CY74FCT138AT CY74FCT138CT UNIT PARAMETER (INPUT) (OUTPUT) MIN MAX MIN MAX MIN MAX UNIT tPLH A O 1.5 9 1.5 5.8 1.5 5 ns tPHL A O 1.5 9 1.5 5.8 1.5 5 ns tPLH E E O 1.5 9 1.5 5.9 1.5 5 ns tPHL E1 or E2 O 1.5 9 1.5 5.9 1.5 5 ns tPLH E3 O 1.5 9 1.5 5.9 1.5 5 ns tPHL E3 O 1.5 9 1.5 5.9 1.5 5 ns |
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