HD74LS85 View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

HD74LS85

4-bit Magnitude Comparator

Renesas Electronics 

HD74LS85

Recommended Operating Conditions

Item

Supply voltage

Output current

Operating temperature

Symbol

VCC

IOH

IOL

Topr

Min

4.75

—

—

–20

Typ

5.00

—

—

25

Max

5.25

–400

8

75

Unit

V

µA

mA

°C

Electrical Characteristics

(Ta = –20 to +75 °C)

Item

Symbol min. typ.* max. Unit

Condition

Input voltage

VIH

2.0

—

—

V

VIL

—

—

0.8

V

Output voltage

VOH

2.7

—

—

V

VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,

IOH = –400 µA

VOL

—

—

0.4

V

IOL = 4 mA VCC = 4.75 V, VIH = 2 V,

—

—

0.5

IOL = 8 mA VIL = 0.8 V

A < B, A > B

inputs

IIH

—

—

20

µA VCC = 5.25 V, VI = 2.7 V

Other inputs

—

—

60

A < B, A > B

Input

current

inputs

IIL

Other inputs

—

—

–0.4

mA VCC = 5.25 V, VI = 0.4 V

—

—

–1.2

A < B, A > B

inputs

II

Other inputs

—

—

0.1

mA VCC = 5.25 V, VI = 7 V

—

—

0.3

Short-circuit output

current

IOS

–20

—

–100

mA VCC = 5.25 V

Supply current**

ICC

—

10.4

20

mA VCC = 5.25 V

Input clamp voltage

VIK

—

—

–1.5

V

VCC = 4.75 V, IIN = –18 mA

Note: * VCC = 5 V, Ta = 25°C

** ICC is measured with outputs open, A = B grounded, and all other inputs at 4.5 V.

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol Inputs

Outputs Number of min. typ. max. Unit Condition

gate levels

1

—

14

—

Any A or A < B, A > B

2

tPLH

B data input

3

—

19

—

—

24

36

A=B

4

—

27

45

1

—

11

—

Any A or A < B, A > B

2

Propagation

tPHL

B data input

3

delay time

A=B

4

—

15

—

—

—

20

23

30

45

ns

CL = 15 pF,

RL = 2 kΩ

tPHL

A < B or

tPHL

A=B

A>B

1

—

14

22

1

—

11

17

tPLH

A=B

tPHL

A=B

2

—

13

20

2

—

13

26

tPLH

A > B or

tPHL

A=B

A<B

1

—

14

22

1

—

11

17

Rev.2.00, Feb.18.2005, page 3 of 6

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