74LS244 查看數據表（PDF） - System Logic Semiconductor

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74LS244

Octal 3-State Noninverting Buffer/Line Driver/Line Receiver

System Logic Semiconductor 

SL74LS244

MAXIMUM RATINGS*

Symbol

Parameter

Value

Unit

VCC Supply Voltage

VIN

Input Voltage

VOUT Output Voltage

Tstg Storage Temperature Range

7.0

V

7.0

V

5.5

V

-65 to +150

°C

*Maximum Ratings are those values beyond which damage to the device may occur.

Functional operation should be restricted to the Recommended Operating Conditions.

RECOMMENDED OPERATING CONDITIONS

Symbol

Parameter

VCC

Supply Voltage

VIH

High Level Input Voltage

VIL

Low Level Input Voltage

IOH

High Level Output Current

IOL

Low Level Output Current

TA

Ambient Temperature Range

Min Max Unit

4.75 5.25

V

2.0

V

0.8

V

-15

mA

24

mA

0

+70

°C

DC ELECTRICAL CHARACTERISTICS over full operating conditions

Symbol

VIK

VOH

Parameter

Input Clamp Voltage

High Level Output Voltage

VOL Low Level Output Voltage

VT+ - VT-

IOZH

IOZL

IIH

Hysteresis

Output Off Current HIGH

Output Off Current LOW

High Level Input Current

IIL

Low Level Input Current

IO

Output Short Circuit Current

ICC

Supply

Current

Outputs High

Outputs Low

All outputs

disabled

Test Conditions

VCC = min, IIN = -18 mA

VCC = min, IOH = -1.0 mA

VCC = min, IOH = -3.0 mA

VCC = min, IOH = -15 mA

VCC = min, IOL = 12 mA

VCC = min, IOL = 24 mA

VCC = min

VCC = max, VOUT = 2.7 V

VCC = max, VOUT = 0.4 V

VCC = max, VIN = 2.7 V

VCC = max, VIN = 7.0 V

VCC = max, VIN = 0.4 V

VCC = max, VO =0 V

(Note 1)

VCC = max

Outputs open

Guaranteed Limit

Min

Max Unit

-1.5

V

2.7

V

2.4

2.0

0.4

V

0.5

0.2

V

20

µA

-20

µA

20

µA

0.1

mA

-0.2 mA

-40

-225 mA

27

mA

46

54

SLS

System Logic

Semiconductor

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