74AHCT259D View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

Manufacturer

74AHCT259D

8-bit addressable latch

NXP Semiconductors. 

NXP Semiconductors

74AHC259; 74AHCT259

8-bit addressable latch

Table 8. Dynamic characteristics …continued

Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 11.

Symbol Parameter Conditions

25 °C

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

Min Typ[1] Max Min Max

Min

Max

tsu

set-up time D, An to LE; see Figure 9

and Figure 10

4.0 -

-

4.0

-

4.0

- ns

th

hold time D, An to LE; see Figure 9

and Figure 10

1.0 -

-

1.0

-

1.0

- ns

CPD

power

fi = 1 MHz; VI = GND to VCC [4] -

17

-

-

-

-

- pF

dissipation

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] tpd is the same as tPHL only.

[4] 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

VCC

D input

GND

VOH

Qn output

VOL

VM

tPHL

VM

tPLH

001aah123

Fig 5.

Measurement points are given in Table 9.

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

Data input to output propagation delays

74AHC_AHCT259_2

Product data sheet

Rev. 02 — 15 May 2008

© NXP B.V. 2008. All rights reserved.

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