74LVC2G66DC datasheet(10/23 Pages) NXP

10 / 23 page

74LVC2G66_2

Product data sheet

Rev. 02 — 28 August 2007

10 of 23

NXP Semiconductors

74LVC2G66

Bilateral switch

11. Dynamic characteristics

[1]

Typical values are measured at Tamb =25 °C and nominal VCC.

[2]

tpd is the same as tPLH and tPHL

[3]

propagation delay is the calculated RC time constant of the typical ON resistance of the switch and the speciﬁed capacitance when

driven by an ideal voltage source (zero output impedance).

[4]

ten is the same as tPZH and tPZL

[5]

tdis is the same as tPLZ and tPHZ

[6]

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

PD =CPD × VCC2 × fi × N+ Σ{(CL +CS(ON))× VCC2 × fo} where:

fi = input frequency in MHz;

fo = output frequency in MHz;

CL = output load capacitance in pF;

CS(ON) = maximum ON-state switch capacitance in pF;

VCC = supply voltage in V;

N = number of inputs switching;

Σ{(C

L +CS(ON))× VCC

× f

o} = sum of the outputs.

Table 9.

Dynamic characteristics

At recommended operating conditions; voltages are referenced to GND (ground = 0 V); for load circuit see Figure 18.

Symbol Parameter

Conditions

−40 °C to +85 °C

−40 °C to +125 °C Unit

Min

Typ[1]

Max

Min

Max

tpd

propagation delay

nY to nZ or nZ to nY;

see Figure 16

[2][3]

VCC = 1.65 V to 1.95 V

0.8

2.0

3.0

VCC = 2.3 V to 2.7 V

0.4

1.2

2.0

VCC = 2.7 V

0.4

1.0

1.5

VCC = 3.0 V to 3.6 V

0.3

0.8

1.5

VCC = 4.5 V to 5.5 V

0.2

0.6

1.0

ten

enable time

nE to nY or nZ;

see Figure 17

[4]

VCC = 1.65 V to 1.95 V

1.0

4.6

1.0

13.0

VCC = 2.3 V to 2.7 V

1.0

2.7

5.6

1.0

7.5

VCC = 2.7 V

1.0

2.7

5.0

1.0

6.5

VCC = 3.0 V to 3.6 V

1.0

2.4

4.4

1.0

6.0

VCC = 4.5 V to 5.5 V

1.0

1.8

3.9

1.0

5.0

tdis

disable time

E to Y or Z; see Figure 17

[5]

VCC = 1.65 V to 1.95 V

1.0

3.8

9.0

1.0

11.5

VCC = 2.3 V to 2.7 V

1.0

2.1

5.5

1.0

7.0

VCC = 2.7 V

1.0

3.5

6.5

1.0

8.5

VCC = 3.0 V to 3.6 V

1.0

3.0

6.0

1.0

8.0

VCC = 4.5 V to 5.5 V

1.0

2.2

5.0

1.0

6.5

CPD

power dissipation

capacitance

CL = 50 pF; fi = 10 MHz;

VI = GND to VCC

[6]

VCC = 2.5 V

9.0

VCC = 3.3 V

11.0

VCC = 5.0 V

15.7

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