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Unformatted text preview: t register
DC CHARACTERISTICS FOR 74HCT For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: standard ICC category: MSI Note to HCT types 74HC/HCT194 The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications. To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below. INPUT Dn DSR, DSL CP MR Sn UNIT LOAD COEFFICIENT 0.15 0.15 0.50 0.45 0.90 December 1990 8 Philips Semiconductors Product speciﬁcation 4-bit bidirectional universal shift register
AC CHARACTERISTICS FOR 74HCT GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (°C) 74HCT SYMBOL PARAMETER min. tPHL/ tPLH tPHL tTHL/ tTLH tW tW trem tsu tsu tsu th th th fmax propagation delay CP to Qn propagation delay MR to Qn output transition time clock pulse width HIGH or LOW master reset pulse width; LOW removal time MR to CP set-up time Dn to CP set-up time S0, S1 to CP set-up time DSR, DSL to CP hold time Dn to...
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- Fall '10