CD74HC390 datasheet(7/8 Pages) TI

7 / 8 page

HCT TYPES

Propagation Delay (Figure 1)

tPLH,

tPHL

CL = 50pF

4.5

nCP0 to nQ0

CL =15pF

nCP1 to nQ1

tPLH,

tPHL

CL = 50pF

4.5

nCP1 to nQ2

tPLH,

tPHL

CL = 50pF

4.5

nCP1 to nQ3

tPLH,

tPHL

CL = 50pF

4.5

CL =15pF

nCP0 to nQ2

(nQ0 connected to nCP1)

tPLH,

tPHL

CL = 50pF

4.5

105

126

MR to Qn

tPLH,

tPHL

CL = 50pF

4.5

CL =15pF

Output Transition

tTLH,tTHL CL = 50pF

4.5

Input Capacitance

CIN

CL =15pF

Power Dissipation Capacitance

(Notes 4, 5)

CPD

CL =15pF

NOTES:

4. CPD is used to determine the dynamic power consumption, per multiplexer.

5. PD = VCC

2 f

i (CPD + CL) where fi = Input Frequency, CL = Output Load Capacitance, VCC = Supply Voltage.

Switching Speciﬁcations Input tr, tf = 6ns (Continued)

PARAMETER

SYMBOL

TEST

CONDITIONS

VCC

(V)

25oC

-40oC TO 85oC -55oCTO125oC

UNITS

MIN

TYP

MAX

MIN

MAX

MIN

MAX

Test Circuits and Waveforms

FIGURE 1. HC AND HCU TRANSITION TIMES AND PROPAGA-

TION DELAY TIMES, COMBINATION LOGIC

FIGURE 2. HCT TRANSITION TIMES AND PROPAGATION

DELAY TIMES, COMBINATION LOGIC

tPHL

tPLH

tTHL

tTLH

90%

50%

10%

50%

10%

INVERTING

OUTPUT

INPUT

GND

VCC

tr = 6ns

tf = 6ns

90%

tPHL

tPLH

tTHL

tTLH

2.7V

1.3V

0.3V

1.3V

10%

INVERTING

OUTPUT

INPUT

GND

tr = 6ns

tf = 6ns

90%

CD74HC390, CD74HCT390

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