74VHCT245AMTR Просмотр технического описания (PDF) - STMicroelectronics

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производитель

74VHCT245AMTR

OCTAL BUS TRANSCEIVER (3-STATE)

STMicroelectronics 

74VHCT245A

Table 8: Capacitive Characteristics

Test Condition

Value

Symbol

Parameter

CIN Input Capacitance

CI/O

Bus Input

Capacitance

CPD Power Dissipation

Capacitance

(note 1)

TA = 25°C

-40 to 85°C -55 to 125°C Unit

Min. Typ. Max. Min. Max. Min. Max.

6 10

10

10 pF

8

pF

18

pF

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without

load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/8 (per circuit)

Table 4: DYNAMIC SWITCHING CHARACTERISTICS

Test Condition

Value

Symbol

Parameter

VCC

(V)

TA = 25°C

-40 to 85°C -55 to 125°C Unit

Min. Typ. Max. Min. Max. Min. Max.

VOLP Dynamic Low

Voltage Quiet

5.0

VOLV Output (note 1, 2)

0.6 0.9

-0.9 -0.6

Dynamic High

VIHD Voltage Input

5.0

CL = 50 pF

2.0

V

(note 1, 3)

Dynamic Low

VILD Voltage Input

5.0

0.8

(note 1, 3)

1) Worst case package.

2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.0V, (n-1) outputs switching and one output at GND.

3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.0V. Inputs under test switching: 3.0V to threshold (VILD), 0V to threshold

(VIHD), f=1MHz.

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