74HC366D datasheet(11/19 Pages) NXP

11 / 19 page

74HC_HCT366_3

Product data sheet

Rev. 03 — 21 November 2006

11 of 19

NXP Semiconductors

74HC366; 74HCT366

Hex buffer/line driver; 3-state; inverting

[4]

tt is the same as tTHL and tTLH.

[5]

CPD is used to determine the dynamic power dissipation (PD in µW).

PD =CPD × VCC2 × fi × N + ∑(CL × VCC2 × fo) where:

fi = input frequency in MHz;

fo = output frequency in MHz;

CL = output load capacitance in pF;

VCC = supply voltage in V;

N = number of inputs switching;

∑(CL × VCC2 × fo) = sum of outputs.

11. Waveforms

Measurement points are given in Table 10.

VOL and VOH are typical output voltage drop that occur with the output load.

Fig 6.

Propagation delay data input (nA) to output (nY) and output transition time

001aaf585

tPHL

tTHL

tTLH

tPLH

nA input

GND

VOH

VOL

nY output

Measurement points are given in Table 10.

VOL and VOH are typical output voltage drop that occur with the output load.

Fig 7.

3-state enable and disable times

001aaf586

tPLZ

tPHZ

outputs

disabled

outputs

enabled

GND

VCC

VOL

VOH

GND

outputs

enabled

nY output

LOW-to-OFF

OFF-to-LOW

nY output

HIGH-to-OFF

OFF-to-HIGH

OEn input

tPZL

tPZH

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