74HCT139(2015) 查看數據表（PDF） - NXP Semiconductors.

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74HCT139
(Rev.:2015)

Dual 2-to-4 line decoder/demultiplexer

NXP Semiconductors. 

Nexperia

74HC139; 74HCT139

Dual 2-to-4 line decoder/demultiplexer

Table 7. Dynamic characteristics …continued

Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 8.

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

CPD

power

CL = 50 pF; f = 1 MHz;

[3] -

44 -

-

-

-

-

dissipation VI = GND to VCC  1.5 V

capacitance

Unit

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

Q$Q

LQSXW

9&&

*1'

Q<Q

LQSXW

92+

92/

90

W3+/

90

W7+/

W3/+

W7/+

DDD

Fig 6.

Measurement points are given in Table 8.

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

Propagation delay input (nAn) to output (nYn) and transition time output (nYn)

74HC_HCT139

Product data sheet

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

Rev. 4 — 11 December 2015

© Nexperia B.V. 2017. All rights reserved

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