74126供应商报价哪里找芯片批发报价原理和应用中文资料-中国IC网-芯三七

August 1986

Revised March 2000

DM74LS126A

Quad 3-STATE Buffer

General Description

This device contains four independent gates each of which

performs a non-inverting buffer function. The outputs have

the 3-STATE feature. When enabled, the outputs exhibit

the low impedance characteristics of a standard LS output

with additional drive capability to permit the driving of bus

lines without external resistors. When disabled, both the

output transistors are turned OFF presenting a high-imped-

ance state to the bus line. Thus the output will act neither

as a significant load nor as a driver. To minimize the possi-

bility that two outputs will attempt to take a common bus to

opposite logic levels, the disable time is shorter than the

enable time of the outputs.

Ordering Code:

Order Number Package Number

Package Description

DM74LS126AM

DM74LS126AN

M14A

N14A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow

14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Function Table

Y = A

Inputs

Output

A

L

C

H

L

Y

L

H

X

H

Hi-Z

H = HIGH Logic Level

L = LOW Logic Level

X = Either LOW or HIGH Logic Level

Hi-Z = 3-STATE (Outputs are disabled)

DS006388

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Absolute Maximum Ratings(Note 1)

Note 1: The “Absolute Maximum Ratings” are those values beyond which

the safety of the device cannot be guaranteed. The device should not be

operated at these limits. The parametric values defined in the Electrical

Characteristics tables are not guaranteed at the absolute maximum ratings.

The “Recommended Operating Conditions” table will define the conditions

for actual device operation.

Supply Voltage

Input Voltage

7V

Operating Free Air Temperature Range

Storage Temperature Range

0°C to +70°C

−65°C to +150°C

Recommended Operating Conditions

Symbol

Parameter

Min

Nom

Max

Units

V

V_CC

V_IH

V_IL

I_OH

I_OL

T_A

Supply Voltage

4.75

5

5.25

HIGH Level Input Voltage

LOW Level Input Voltage

HIGH Level Output Current

LOW Level Output Current

Free Air Operating Temperature

V

0.8

−2.6

24

V

mA

°C

0

70

Electrical Characteristics

over recommended operating free air temperature range (unless otherwise noted)

Symbol Parameter Conditions

Input Clamp Voltage = Min, I = −18 mA

Typ

Min

Max

Units

(Note 2)

V

−1.5

V

I

CC

I

HIGH Level

= Min, I = Max

OH

2.4

Output Voltage

LOW Level

= Min

IH

V

= Min, I = Max

OL

CC

0.35

0.25

0.5

Output Voltage

= Max, V = Min

V

IL

IH

I

= 12 mA, V = Min

0.4

0.1

OL

CC

I

Input Current @ Max Input Voltage

HIGH Level Input Current

V

= Max, V = 7V

mA

µA

I

CC

I

V

= Max, V = 2.7V

20

IH

I

LOW Level Input Current

= Max, V = 0.4V

−0.4

mA

IL

I

Off-State Output Current with

HIGH Level Output Voltage Applied

Off-State Output Current with

LOW Level Output Voltage Applied

Short Circuit Output Current

Supply Current

= Max, V = 2.4V

O

OZH

20

µA

= Min, V = Max

IH

IL

I

= Max, V = 0.4V

O

OZL

CC

−20

= Min, V = Max

IH

IL

I

= Max (Note 3)

= Max

−20

−100

mA

OS

CC

I

12

22

CC

Note 2: All typicals are at V = 5V, T = 25°C.

CC

A

Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.

Switching Characteristics

V

_CC= 5V, T = 25°C

A

R

= 667Ω

L

C

= 50 pF

C

= 150 pF

L

Symbol

Parameter

Units

L

Min

Max

Min

Max

21

t

Propagation Delay Time LOW-to-HIGH Level Output

Propagation Delay Time HIGH-to-LOW Level Output

Output Enable Time to HIGH Level Output

15

18

30

25

ns

PLH

22

PHL

PZH

PZL

PHZ

PLZ

36

Output Enable Time to LOW Level Output

42

Output Disable Time from HIGH Level Output (Note 4)

Output Disable Time from LOW Level Output (Note 4)

Note 4: C = 5pF.

L

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2

Physical Dimensions inches (millimeters) unless otherwise noted

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow

Package Number M14A

3

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Package Number N14A

Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and

Fairchild reserves the right at any time without notice to change said circuitry and specifications.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT

DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD

SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or systems

which, (a) are intended for surgical implant into the

body, or (b) support or sustain life, and (c) whose failure

to perform when properly used in accordance with

instructions for use provided in the labeling, can be rea-

sonably expected to result in a significant injury to the

user.

2. A critical component in any component of a life support

device or system whose failure to perform can be rea-

sonably expected to cause the failure of the life support

device or system, or to affect its safety or effectiveness.

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4

型号:	74126
生命周期：	Active
IHS 制造商：	MOLEX LLC
Reach Compliance Code：	unknown
风险等级：	5.19
Is Samacsys：	N
其他特性：	STANDARD: UL 94V-0, THERMOPLASTIC
紧固方法：	SCREW
制造商序列号：	74
安装类型：	BOARD
层数：	1
行数：	1
通路数：	26
额定电流：	30 A
额定电压：	300 V
安全认证：	CSA; UL
端子和端子排类型：	BARRIER STRIP TERMINAL BLOCK
线规：	10 AWG
Base Number Matches：	1

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