TC74VHC245F_07 datasheet(4/9 Pages) TOSHIBA

Numer części	TC74VHC245F

Szczegółowy opis	Octal Bus Transceiver

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Producent	TOSHIBA [Toshiba Semiconductor]

Strona internetowa	http://www.semicon.toshiba.co.jp/eng

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4 / 9 page

TC74VHC245F/FT/FK

2007-10-01

4

AC Characteristics (input: tr = tf = 3 ns)

Test Condition

Ta = 25°C

Ta = −40 to

85°C

Characteristics

Symbol

VCC (V)

CL (pF)

Min

Typ.

Max

Min

Max

Unit

15

―

5.8

8.4

1.0

10.0

3.3 ± 0.3

50

―

8.3

11.9

1.0

13.5

15

―

4.0

5.5

1.0

6.5

Propagation delay

time

tpLH

tpHL

―

5.0 ± 0.5

50

―

5.5

7.5

1.0

8.5

ns

15

―

8.5

13.2

1.0

15.5

3.3 ± 0.3

50

―

11.0

16.7

1.0

19.0

15

―

5.8

8.5

1.0

10.0

3-state output enable

time

tpZL

tpZH

RL = 1 kΩ

5.0 ± 0.5

50

―

7.3

10.6

1.0

12.0

ns

3.3 ± 0.3

50

―

11.5

15.8

1.0

18.0

3-state output disable

time

tpLZ

tpHZ

RL = 1 kΩ

5.0 ± 0.5

50

―

7.0

9.7

1.0

11.0

ns

3.3 ± 0.3

50

―

1.5

―

1.5

Output to output skew

tosLH

tosHL

(Note 1)

5.0 ± 0.5

50

―

1.0

―

1.0

ns

Input capacitance

CIN

DIR, G

―

4

10

―

10

pF

Bus input capacitance

CI/O

An, Bn

―

8

―

pF

Power dissipation

capacitance

CPD

(Note 2)

―

21

―

pF

Note 1: Parameter guaranteed by design.

tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|

Note 2: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating

current consumption without load.

Average operating current can be obtained by the equation:

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

Noise Characteristics (input: tr = tf = 3 ns) (Note)

Test Condition

Ta = 25°C

Characteristics

Symbol

VCC (V)

Typ.

Max

Unit

Quiet output maximum dynamic

VOL

VOLP

CL = 50 pF

5.0

0.7

(0.9)

1.0

(1.2)

V

Quiet output minimum dynamic

VOL

VOLV

CL = 50 pF

5.0

−0.7

(−0.9)

−1.0

(−1.2)

V

Minimum high level dynamic input

voltage

VIHD

CL = 50 pF

5.0

―

3.5

V

Maximum low level dynamic input

voltage

VILD

CL = 50 pF

5.0

―

1.5

V

Note:

The value in ( ) only applies to JEDEC SOP (FW) devices.

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