74HCT157D-Q100 Просмотр технического описания (PDF) - NXP Semiconductors.

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74HCT157D-Q100

Quad 2-input multiplexer

NXP Semiconductors. 

Nexperia

74HC157-Q100; 74HCT157-Q100

Quad 2-input multiplexer

Table 7. Dynamic characteristics …continued

Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 9.

Symbol Parameter Conditions

Tamb = 25 C

Tamb = 40 C

to +85 C

Tamb = 40 C

to +125 C

Min Typ Max Min Max Min Max

tt

transition nY; see Figure 7

time

VCC = 4.5 V

[2]

-

7 15

-

19

-

22

CPD

power

CL = 50 pF; f = 1 MHz;

[3] -

70 -

-

-

-

-

dissipation VI = GND to VCC  1.5 V

capacitance

Unit

ns

pF

[1] tpd is the same as tPLH and tPHL.

[2] tt is the same as tTHL and tTLH.

[3] CPD is used to determine the dynamic power dissipation (PD in W).

PD = CPD  VCC2  fi  N + (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;

(CL  VCC2  fo) = sum of outputs.

11. Waveforms

9,

LQSXW

6Q,Q,

*1'

92+

RXWSXW

Q<

92/

90

W3+/

90

W 7+/

90

90



W 3/+



W 7/+

DDG

Fig 7.

Measurement points are given in Table 8.

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

Propagation delay input (nI0, nI1, S) to output (nYn)

74HC_HCT157_Q100

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 2 — 21 January 2015

© Nexperia B.V. 2017. All rights reserved

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