74LVC2G86 datasheet(7/15 Pages) NXP

7 / 15 page

74LVC2G86_5

Product data sheet

Rev. 05 — 7 September 2007

7 of 15

NXP Semiconductors

74LVC2G86

Dual 2-input EXCLUSIVE-OR gate

11. Dynamic characteristics

[1]

Typical values are measured at Tamb =25 °C and VCC = 1.8 V, 2.5 V, 2.7 V, 3.3 V and 5.0 V respectively.

[2]

tpd is the same as tPLH and tPHL

[3]

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;

∑(C

L × VCC

× f

o) = sum of outputs.

12. Waveforms

Table 8.

Dynamic characteristics

Voltages are referenced to GND (ground 0 V); for test circuit see Figure 8.

Symbol Parameter

Conditions

−40 °C to +85 °C

−40 °C to +125 °C Unit

Min

Typ[1]

Max

Min

Max

tpd

propagation delay

nA, nB to nY; see Figure 7

[2]

VCC = 1.65 V to 1.95 V

1.4

3.8

9.9

1.4

12.4

VCC = 2.3 V to 2.7 V

0.8

2.5

5.7

0.8

7.2

VCC = 2.7 V

0.8

3.0

5.7

0.8

7.2

VCC = 3.0 V to 3.6 V

0.8

2.3

4.7

0.8

5.9

VCC = 4.5 V to 5.5 V

0.6

1.9

3.6

0.6

4.5

CPD

power dissipation

capacitance

per gate; VI = GND to VCC;

VCC = 3.3 V

[3]

output enabled

15.8

Measurement points are given in Table 9.

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

Fig 7.

Propagation delay input (nA, nB) to output (nY)

mna224

nA, nB input

nY output

tPLH

tPHL

GND

VOH

VOL

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