74AHCT2G08 datasheet(9/17 Pages) PHILIPS

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9397 750 13735

Product data sheet

Rev. 02 — 18 October 2004

9 of 17

Philips Semiconductors

74AHC2G08; 74AHCT2G08

Dual 2-input AND gate

12. Dynamic characteristics

[1]

Typical values are measured at VCC = 3.3 V.

[2]

Typical values are measured at VCC = 5.0 V.

[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 Volts;

N = number of inputs switching;

Σ(C

L × VCC

× f

o) = sum of the outputs.

[4]

The condition is VI = GND to VCC.

Table 10:

Dynamic characteristics type 74AHC2G08

At recommended operating conditions; voltages are referenced to GND (ground = 0 V); tr =tf ≤ 3.0 ns; see Figure 7.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Tamb = 25 °C

tPHL, tPLH

propagation delay

nA and nB to nY

see Figure 6

VCC = 3.0 V to 3.6 V; CL = 15 pF

[1] -

4.6

8.8

VCC = 4.5 V to 5.5 V; CL = 15 pF

[2] -

3.2

5.9

VCC = 3.0 V to 3.6 V; CL = 50 pF

[1] -

6.5

12.3

VCC = 4.5 V to 5.5 V; CL = 50 pF

[2] -

4.6

7.9

CPD

power dissipation

capacitance

CL = 50 pF; fi = 1 MHz

[3] [4] -17

Tamb = −40 °C to +85 °C

tPHL, tPLH

propagation delay

nA and nB to nY

see Figure 6

VCC = 3.0 V to 3.6 V; CL = 15 pF

1.0

10.5

VCC = 4.5 V to 5.5 V; CL = 15 pF

1.0

7.0

VCC = 3.0 V to 3.6 V; CL = 50 pF

1.0

14.0

VCC = 4.5 V to 5.5 V; CL = 50 pF

1.0

9.0

Tamb = −40 °C to +125 °C

tPHL, tPLH

propagation delay

nA and nB to nY

see Figure 6

VCC = 3.0 V to 3.6 V; CL = 15 pF

1.0

12.0

VCC = 4.5 V to 5.5 V; CL = 15 pF

1.0

8.0

VCC = 3.0 V to 3.6 V; CL = 50 pF

1.0

16.0

VCC = 4.5 V to 5.5 V; CL = 50 pF

1.0

10.5

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