CD74FCT646SM datasheet(5/8 Pages) TI

No. de pieza	CD74FCT646SM

Descripción Electrónicos	BiCMOS FCT Interface Logic, Octal Bus Transceiver/Register, Three-State

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Fabricante Electrónico	TI [Texas Instruments]

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8-71

CD74FCT646

Switching Speciﬁcations Over Operating Range FCT Series tr, tf = 2.5ns, CL = 50pF, RL (Figure 1) (Note 7)

PARAMETER

SYMBOL

VCC (V)

25oC0oC TO 70oC

UNITS

TYP

MIN

MAX

Propagation Delays

(Note 8)

Store An

→ Bn, Store Bn → An, An → Bn, Bn → An

tPLH, tPHL

5

6.8

2

9

ns

Select to Data

tPLH, tPHL

5

8.3

2

11

ns

Output Enable to Output

tPZL, tPZH

5

10.5

2

14

ns

Output Disable to Output

tPLZ, tPHZ

5

6.8

2

9

ns

Power Dissipation Capacitance

CPD

(Note 8)

----

pF

Minimum (Valley) VOHV During Switching of

Other Outputs (Output Under Test Not Switching)

VOHV

5

0.5

-

V

Maximum (Peak) VOLP During Switching of

Other Outputs (Output Under Test Not Switching)

VOLP

51

-

V

Input Capacitance

CI

---

10

pF

Input/Output Capacitance

CI/O

---

15

pF

NOTES:

7. 5V: Minimum is at 5.25V for 0oC to 70oC, Maximum is at 4.75V for 0oC to 70oC, Typical is at 5V.

8. CPD, measured per flip-flop, is used to determine the dynamic power consumption.

PD (per package) = VCC ICC + Σ(VCC

2 f

I CPD + VO

2 f

OCL + VCC ∆ICC D) where:

VCC = supply voltage

∆ICC = flow through current x unit load

CL = output load capacitance

D = duty cycle of input high

fO = output frequency

fI = input frequency

Prerequisite For Switching

PARAMETER

SYMBOL

VCC (V)

25oC0oC TO 70oC

UNITS

TYP

MIN

MAX

Maximum Frequency

fMAX

5

(Note 9)

-85-

ns

Data to Clock Setup Time

tSU

5-

4

-

ns

Data to Clock Hold Time

tH

5-

2

-

ns

Clock Pulse Width

tW

5-

6

-

ns

NOTE:

9. 5V: Minimum is at 4.75V for 0oC to 70oC, Typical is at 5V.

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