TC74LCX245F_07 datasheet(5/10 Pages) TOSHIBA

Teilenummer	TC74LCX245F

Bauteilbeschribung	Low-Voltage Octal Bus Transceiver with 5-V Tolerant Inputs and Outputs

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Hersteller	TOSHIBA [Toshiba Semiconductor]

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5 / 10 page

TC74LCX245F/FT/FK

2007-10-19

5

Dynamic Switching Characteristics (Ta = 25°C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 Ω)

Characteristics

Symbol

Test Condition

VCC (V)

Typ.

Unit

Quiet output maximum

dynamic VOL

VOLP

VIH = 3.3 V, VIL = 0 V

3.3

0.8

V

Quiet output minimum

dynamic VOL

|VOLV| VIH = 3.3 V, VIL = 0 V

3.3

0.8

V

Capacitive Characteristics (Ta = 25°C)

Characteristics

Symbol

Test Condition

VCC (V)

Typ.

Unit

Input capacitance

CIN

DIR, OE

3.3

7

pF

Bus input capacitance

CI/O

An, Bn

3.3

8

pF

Power dissipation capacitance

CPD

fIN = 10 MHz

(Note)

3.3

25

pF

Note:

CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating

current consumption.

Average operating current can be obtained by the equation:

ICC (opr) = CPD･VCC･fIN + ICC/8 (per bit)

AC Test Circuit

AC Waveform

90%

10%

Output

(Bn, An)

Input

(An, Bn)

VOL

VOH

GND

2.7 V

1.5 V

tpLH

tpHL

tr 2.5 ns

tf 2.5 ns

1.5 V

Figure 2 tpLH, tpHL

Open

6.0 V

GND

Switch

Output

Measure

RL = 500 Ω

CL = 50 pF

Parameter

Switch

tpLH, tpHL

Open

tpLZ, tpZL

6.0 V

tpHZ, tpZH

GND

Figure 1

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