HD74LS248 datasheet(4/7 Pages) RENESAS

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HD74LS248

Rev.3.00, Jul.15.2005, page 4 of 6

Recommended Operating Conditions

Item

Symbol

Min

Typ

Max

Unit

Supply voltage

VCC

4.75

5.00

5.25

Operating temperature

Topr

–20

°C

a to g

—

–100

µA

BI/RBO

IOH

—

–50

µA

a to g

—

Output current

BI/RBO

IOL

—

3.2

6 7 8 9 101112131415

Electrical Characteristics

(Ta = –20 to +75 °C)

Item

Symbol

min.

typ.*

max.

Unit

Condition

VIH

2.0

—

Input voltage

VIL

—

0.8

a to g

IOH = –100

µA

Output

voltage

BI/RBO

VOH

2.4

—

IOH = –50

µA

VCC = 4.75 V, VIH = 2 V,

VIL = 0.8 V

Output

current**

a to g

–1.3

—

VCC = 4.75 V, VO = 0.85 V

—

0.4

IOL = 2 mA

a to g

—

0.5

IOL = 6 mA

—

0.4

IOL = 1.6 mA

Output

voltage

BI/RBO

VOL

—

0.5

IOL = 3.2 mA

VCC = 4.75 V, VIH = 2 V,

VIL = 0.8 V

Except

BI/RBO

IIH

—

µA

VCC = 5.25 V, VI = 2.7 V

Except

BI/RBO

—

–0.4

BI/RBI

IIL

—

–1.2

VCC = 5.25 V, VI = 0.4 V

Input current

Except

BI/RBO

—

0.1

VCC = 5.25 V, VI = 7 V

Short-circuit

output current

BI/RBO

IOS

–0.3

—

–2

VCC = 5.25 V

Supply current***

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

** Input condition as for VOH.

*** ICC is measured with all outputs open and all inputs at 4.5 V.

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol

Input

min.

typ.

max.

Unit

Condition

tPLH

—

100

tPHL

—

100

CL = 15 pF, RL = 4 k

Ω

tPLH

—

100

Propagation delay time

tPHL

RBI

—

100

CL = 15 pF, RL = 6 k

Ω

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