CD74FCT240E datasheet(3/12 Pages) TI1

部件名	CD74FCT240E

功能描述	BiCMOS OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS

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制造商	TI1 [Texas Instruments]

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CD74FCT240

BiCMOS OCTAL BUFFER/LINE DRIVER

WITH 3-STATE OUTPUTS

SCBS729 − JULY 2000

3

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

recommended operating conditions (see Note 2)

MIN

MAX

UNIT

VCC

Supply voltage

4.75

5.25

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

VI

Input voltage

0

VCC

V

VO

Output voltage

0

VCC

V

IOH

High-level output current

−15

mA

IOL

Low-level output current

64

mA

Δt/Δv

Input transition rise or fall rate (slew rate)

0

10

ns/V

TA

Operating free-air temperature

0

70

°C

NOTE 2: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,

Implications of Slow or Floating CMOS Inputs, literature number SCBA004.

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

V

TA = 25°C

MIN

MAX

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

MAX

MIN

MAX

UNIT

VIK

II = −18 mA

4.75 V

−1.2

V

VOH

IOH = −15 mA

4.75 V

2.4

V

VOL

IOL = 64 mA

4.75 V

0.55

V

II

VI = VCC or GND

5.25 V

±0.1

±1

mA

IOZ

VO = VCC or GND

5.25 V

±0.5

±10

mA

IOS†

VI = VCC or GND,

VO = 0

5.25 V

−60

mA

ICC

VI = VCC or GND,

IO = 0

5.25 V

8

80

mA

ΔICC‡

One input at 3.4 V,

Other inputs at VCC or GND

5.25 V

1.6

mA

Ci

VI = VCC or GND

10

pF

Co

VO = VCC or GND

15

pF

† Not more than one output should be tested at a time, and the duration of the test should not exceed 100 ms.

‡ This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V or VCC.

switching

characteristics

over

recommended

operating

free-air

temperature

range,

VCC = 5 V ± 0.25 V (unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

TA = 25°C

MIN

MAX

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

TYP

MIN

MAX

UNIT

tpd

A

Y

5

1.5

8

ns

ten

OE

Y

7

1.5

10

ns

tdis

OE

Y

6

1.5

9.5

ns

noise characteristics, VCC = 5 V, CL = 50 pF, TA = 25°C

PARAMETER

MIN

TYP

MAX

UNIT

VOL(P)

Quiet output, maximum dynamic VOL

1

V

VOH(V)

Quiet output, minimum dynamic VOH

0.5

V

VIH(D)

High-level dynamic input voltage

2

V

VIL(D)

Low-level dynamic input voltage

0.8

V

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