HD74LS242P 查看數據表（PDF） - Renesas Electronics

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HD74LS242P

Quadruple Bus Transceivers (with three-state outputs)

Renesas Electronics 

HD74LS242

Electrical Characteristics

(Ta = –20 to +75 °C)

Item

Symbol min. typ.* max. Unit

Condition

Input voltage

Hysteresis

VIH

2.0

VIL

—

VT+ – VT–

0.2

Output voltage

2.4

VOH

2

—

VOL

—

Off-state output current

IOZH

—

IOZL

—

IIH

—

A Input

—

—

—

V

—

0.8

V

0.4

—

V VCC = 4.75 V

—

—

—

—

V

VIL = 0.8 V, IOH = – 3 mA

VIL = 0.5 V, IOH = – 15 mA

VCC = 4.75 V,

VIH = 2 V

—

0.4

V

IOL = 12 mA

—

0.5

IOL = 24 mA

VCC = 4.75 V, VIH = 2 V,

VIL = 0.8 V

—

40

µA

VO = 2.7 V

— –200

VO = 0.4 V

VCC = 5.25 V, VIH = 2 V,

VIL = 0.8 V

—

20

µA VCC = 5.25 V, VI = 2.7 V

—

–0.2

VCC = 5.25 V, VI = 0.4 V,

GAB or GBA at GND

Input

B Input

IIL

current

GAB or GBA

A or B

GAB or GBA

II

Short-circuit output

current

IOS

—

—

–0.2

mA VCC = 5.25 V, VI = 0.4 V,

GAB or GBA at 4.5 V

—

—

–0.2

VCC = 5.25 V, VI = 0.4 V

—

—

0.1

mA VCC = 5.25 V, VI = 5.5 V

—

—

0.1

VCC = 5.25 V, VI = 7 V

–40

—

–225 mA VCC = 5.25 V

ICCH

—

22

38

Supply current**

ICCL

—

29

50

mA VCC = 5.25 V

ICCZ

—

29

50

Input clamp voltage

VIK

—

—

–1.5

V VCC = 4.75 V, IIN = –18 mA

Notes: * VCC = 5 V, Ta = 25°C

** With all outputs open, ICC is measured with transceivers enabled in one direction only, or with all transceivers

disabled.

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol

min.

typ.

max.

Unit

Condition

Propagation delay time

tPLH

—

9

14

Output enable time

tPHL

—

tZL

—

12

20

18

30

CL = 45 pF, RL = 667 Ω

ns

tZH

—

15

23

Output disable time

tLZ

—

15

25

tHZ

—

10

18

CL = 5 pF, RL = 667 Ω

Rev.3.00, Jul.15.2005, page 3 of 6

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