74AHC02BQ(2008_05) 查看數據表（PDF） - NXP Semiconductors.

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74AHC02BQ
(Rev.:2008_05)

Quad 2-input NOR gate

NXP Semiconductors. 

NXP Semiconductors

74AHC02; 74AHCT02

Quad 2-input NOR gate

Table 7. Dynamic characteristics …continued

Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7.

Symbol Parameter Conditions

25 °C

−40 °C to +85 °C −40 °C to +125 °C Unit

Min Typ[1] Max Min

Max

Min

Max

74AHCT02; VCC = 4.5 V to 5.5 V

tpd

propagation nA, nB to nY; see Figure 6 [2]

delay

CL = 15 pF

- 3.8 5.5 1.0

6.5

1.0

7.0 ns

CL = 50 pF

- 5.1 7.5 1.0

8.5

1.0

9.5 ns

CPD

power

CL = 50 pF; fi = 1 MHz;

[3] -

8.0 -

-

-

-

-

pF

dissipation VI = GND to VCC

capacitance

[1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).

[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(CL × VCC2 × fo) = sum of the outputs.

11. Waveforms

VI

nA, nB input

GND

VOH

nY output

VOL

VM

tPLH

VM

tPHL

001aah085

Fig 6.

Measurement points are given in Table 8.

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

Input to output propagation delays

Table 8. Measurement points

Type

74AHC02

74AHCT02

Input

VM

0.5 × VCC

1.5 V

Output

VM

0.5 × VCC

0.5 × VCC

74AHC_AHCT02_4

Product data sheet

Rev. 04 — 21 May 2008

© NXP B.V. 2008. All rights reserved.

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