74LVC2G02GD datasheet(7/16 Pages) NXP

7 / 16 page

74LVC2G02_7

Product data sheet

Rev. 07 — 6 June 2008

7 of 16

NXP Semiconductors

74LVC2G02

Dual 2-input NOR gate

11. Dynamic characteristics

[1]

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

[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 + Σ(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;

Σ(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 9.

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 8

[2]

VCC = 1.65 V to 1.95 V

1.2

3.8

8.9

1.2

11.2

VCC = 2.3 V to 2.7 V

0.8

2.4

5.4

0.8

6.8

VCC = 2.7 V

0.8

3.2

6.0

0.8

7.5

VCC = 3.0 V to 3.6 V

0.6

2.4

4.9

0.6

6.2

VCC = 4.5 V to 5.5 V

0.6

1.8

4.3

0.6

5.5

CPD

power dissipation

capacitance

per gate; VI = GND to VCC

[3]

-14

Measurement points are given in Table 9.

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

Fig 8.

Input (nA, nB) to output (nY) propagation delays

001aae972

nA, nB input

nY output

tPLH

tPHL

GND

VOH

VOL

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