HD74LS244 datasheet(3/6 Pages) RENESAS

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HD74LS244

Rev.2.00, Feb.18.2005, page 3 of 5

Electrical Characteristics

(Ta = –20 to +75 °C)

Item

Symbol

min.

typ.*

max.

Unit

Condition

VIH

2.0

—

Input voltage

VIL

—

0.8

Hysteresis

+ – V

–

0.2

0.4

—

VCC = 4.75 V

2.4

—

VIL = 0.8 V, IOH = – 3 mA

VOH

2.0

—

VIL = 0.5 V, IOH = – 15 mA

VCC = 4.75 V,

VIH = 2 V

—

0.4

IOL = 12 mA

Output voltage

VOL

—

0.5

IOL = 24 mA

VCC = 4.75 V, VIH = 2 V,

VIL = 0.8 V

IOZH

—

VO = 2.7 V

Off-state output current

IOZL

—

–20

µA

VO = 0.4 V

VCC = 5.25 V, VIH = 2 V,

VIL = 0.8 V

IIH

—

µA

VCC = 5.25 V, VI = 2.7 V

IIL

—

–0.2

VCC = 5.25 V, VI = 0.4 V

Input current

—

0.1

VCC = 5.25 V, VI = 7 V

Short-circuit output

current

IOS

–40

—

–225

VCC = 5.25 V

Outputs

"H"

—

Outputs

"L"

—

Supply

current**

All outputs

disabled

ICC

—

VCC = 5.25 V

Input clamp voltage

VIK

—

–1.5

VCC = 4.75 V, IIN = –18 mA

Notes: * VCC = 5 V, Ta = 25°C

** ICC is measured with all outputs open.

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol

min.

typ.

max.

Unit

Condition

tPLH

—

Propagation delay time

tPHL

—

tZL

—

Output enable time

tZH

—

CL = 45 pF, RL = 667

Ω

tLZ

—

Output disable time

tHZ

—

CL = 5 pF, RL = 667

Ω

Note:

Refer to Test Circuit and Waveform of the Common Item "TTL Common Matter (Document No.: REJ27D0005-

0100)".

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