CD74ACT191 datasheet(8/10 Pages) TI

Il numero della parte	CD74ACT191

Spiegazioni elettronici	Presettable Synchronous 4-Bit Binary Up/Down Counter

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Produttore elettronici	TI [Texas Instruments]

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FIGURE 3.

FIGURE 4.

FIGURE 5.

The shaded areas indicate when the input is permitted to change for

predictable output performance.

FIGURE 6.

FIGURE 7.

FIGURE 8.

Pn

INPUT LEVEL

VS

Qn

tPHL

tPLH

VS

INPUT LEVEL

Pn

tW

PL

VS

tPLH

Qn

tPHL

VS

INPUT LEVEL

PL

CP

Qn

tW

VS

tREC

INPUT LEVEL

Pn

PL

Qn

tSU(H)

VS

tH(H)

tSU(L)

tH(L)

INPUT LEVEL

VS

U/D

VS

tPLH

TC

tPHL

RC

INPUT LEVEL

tPHL

tPLH

VS

CP

VS

CE

CE MAY

CHANGE

tSU(L)

(H-L)

ONLY

tH(L)

CE MAY

CHANGE

VS

tSU(H)

INPUT

LEVEL

INPUT

LEVEL

DUT

OUTPUT

RL (NOTE)

OUTPUT

LOAD

500

Ω

CL

50pF

NOTE: For AC Series Only: When VCC = 1.5V, RL = 1kΩ.

FIGURE 9. PROPAGATION DELAY TIMES

CD74AC

CD74ACT

Input Level

VCC

3V

Input Switching Voltage, VS

0.5 VCC

1.5V

Output Switching Voltage, VS

0.5 VCC

CD74AC191, CD74ACT191

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