74VHC244 datasheet(5/12 Pages) STMICROELECTRONICS

Teilenummer	74VHC244

Bauteilbeschribung	OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED)

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74VHC244

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Table 9: Dynamic Switching Characteristics

1) Worst case package.

2) Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n-1) outputs switching and one output at GND.

3) Max number of data inputs (n) switching. (n-1) switching 0V to 5.0V. Inputs under test switching: 5.0V to threshold (VILD), 0V to threshold

(VIHD), f=1MHz.

Table 10: Test Circuit

CL =15/ 50pF or equivalent (includes jig and probe capacitance)

RL = R1 = 1KΩ or equivalent

RT = ZOUT of pulse generator (typically 50Ω)

Symbol

Parameter

Test Condition

Value

Unit

VCC

(V)

TA = 25°C

-40 to 85°C

-55 to 125°C

Min.

Typ.

Max.

Min.

Max.

Min.

Max.

VOLP

Dynamic Low

Voltage Quiet

Output (note 1, 2)

5.0

CL = 50 pF

0.6

0.9

VOLV

-0.9

-0.6

VIHD

Dynamic High

Voltage Input

(note 1, 3)

5.0

3.5

VILD

Dynamic Low

Voltage Input

(note 1, 3)

5.0

1.5

TEST

SWITCH

tPLH, tPHL

Open

tPZL, tPLZ

VCC

tPZH, tPHZ

GND

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