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产品型号74AC244SC的概述

芯片74AC244SC的概述 74AC244SC是一种具有高速度、高功率的缓冲器和驱动器，由多家电子元件制造商生产。它主要用于提高数字电路的信号传输能力，尤其在需要增加信号驱动能力的场合。该芯片属于74系列 TTL（晶体管-晶体管逻辑）芯片中的 AC（Advanced CMOS）系列，专为具备高频率及高效能的应用而设计。74AC244的功能模块通常有八个单独的缓冲器，每个缓冲器拥有两个输入和一个输出，从而能在实现多个输入时保持稳定的输出信号。芯片74AC244SC的详细参数 74AC244SC的详细参数包括： - 电源电压范围 (VCC): 4.5V 至 5.5V - 输入高电压 (VIH): 2.0V 至 5.5V - 输入低电压 (VIL): -0.5V 至 0.8V - 输出高电压 (VOH): VCC - 0.1V（在负载条件下） - 输出低电压 (VOL): 0.1V（在负...

产品型号74AC244SC的Datasheet PDF文件预览

November 1988

Revised March 2005

74AC244 • 74ACT244

Octal Buffer/Line Driver with 3-STATE Outputs

General Description

Features

The AC/ACT244 is an octal buffer and line driver designed

to be employed as a memory address driver, clock driver

and bus-oriented transmitter/receiver which provides

improved PC board density.

■ I_CCand I_OZreduced by 50%

■ 3-STATE outputs drive bus lines or buffer memory

address registers

■ Outputs source/sink 24 mA

■ ACT244 has TTL-compatible inputs

Ordering Code:

Package

Order Number

Package Description

Number

74AC244SC

M20B

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

74AC244SCX_NL

(Note 1)

Pb-Free 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

74AC244SJ

M20D

MTC20

Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74AC244MTC

20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

74AC244MTCX_NL

(Note 1)

Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm

Wide

74AC244PC

N20A

M20B

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

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

Pb-Free 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

74ACT244SC

74ACT244SCX_NL

(Note 1)

74ACT244SJ

M20D

MSA20

MTC20

Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide

20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

74ACT244MSA

74ACT244MTC

74ACT244MTCX_NL

(Note 1)

Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm

Wide

74ACT244PC

N20A

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

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

Pb-Free package per JEDEC J-STD-020B.

Note 1: “_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Please use order number as indicated.

FACT is a trademark of Fairchild Semiconductor Corporation.

DS009943

www.fairchildsemi.com

Logic Symbol

Pin Descriptions

Pin Names

Description

IEEE/IEC

OE₁, OE₂

I₀–I₇

3-STATE Output Enable Inputs

Inputs

O₀–O₇

Outputs

Truth Tables

Inputs

OE₁

Outputs

I_n

(Pins 12, 14, 16, 18)

Connection Diagram

Inputs

OE₂

Outputs

I_n

(Pins 3, 5, 7, 9)

Immaterial

High Impedance

www.fairchildsemi.com

Absolute Maximum Ratings(Note 2)

Recommended Operating

Conditions

Supply Voltage (V_CC

DC Input Diode Current (I_IK

V_I0.5V

)

0.5V to 7.0V

)

Supply Voltage (V_CC

)

20 mA

2.0V to 6.0V

4.5V to 5.5V

0V to V_CC

V_IV_CC0.5V

ACT

DC Input Voltage (V_I)

0.5V to V_CC0.5V

Input Voltage (V_I)

Output Voltage (V_O)

DC Output Diode Current (I_OK

V_O0.5V

)

0V to V_CC

20 mA

Operating Temperature (T_A)

Minimum Input Edge Rate ( V/ t)

AC Devices

40 C to 85 C

V_OV_CC0.5V

DC Output Voltage (V_O)

DC Output Source

0.5V to V_CC0.5V

_INfrom 30% to 70% of V_CC

or Sink Current (I_O)

50 mA

V_CC@ 3.3V, 4.5V, 5.5V

Minimum Input Edge Rate ( V/ t)

ACT Devices

125 mV/ns

DC V_CCor Ground Current

per Output Pin (I_CCor I_GND

)

50 mA

Storage Temperature (T_STG

Junction Temperature (T_J)

PDIP

)

65 C to 150 C

V_INfrom 0.8V to 2.0V

V_CC@ 4.5V, 5.5V

140 C

Note 2: Absolute maximum ratings are those values beyond which damage

to the device may occur. The databook specifications should be met, with-

out exception, to ensure that the system design is reliable over its power

supply, temperature, and output/input loading variables. Fairchild does not

recommend operation of FACT circuits outside databook specifications.

DC Electrical Characteristics for AC

25 C

55 C to 125 C

40 C to 85 C

Symbol

Parameter

Units

Conditions

(V)

3.0

4.5

5.5

3.0

4.5

5.5

3.0

4.5

5.5

3.0

4.5

5.5

3.0

4.5

5.5

3.0

4.5

5.5

Typ

1.5

Guaranteed Limits

Minimum HIGH Level

Input Voltage

2.1

3.15

3.85

0.9

2.1

3.15

3.85

0.9

0.1V

OUT

2.25

2.75

1.5

3.15

3.85

0.9

or V

Maximum LOW Level

Input Voltage

0.1V

OUT

2.25

2.75

2.99

4.49

5.49

1.35

1.65

2.9

1.35

1.65

2.9

1.35

1.65

2.9

or V

Minimum HIGH Level

Output Voltage

4.4

50 A

OUT

5.4

2.56

3.86

4.86

0.1

2.4

2.46

3.76

4.76

0.1

12 mA

24 mA

3.7

4.7

24 mA (Note 3)

Maximum LOW Level

Output Voltage

0.002

0.001

0.1

50 A

OUT

0.1

0.36

0.1

0.50

1.0

0.44

1.0

12 mA

24 mA

24 mA (Note 3)

Maximum Input

, GND

(Note 5) Leakage Current

Maximum

V (OE)

, V

IL IH

3-STATE

5.5

0.25

5.0

2.5

, V

GND

Current

, GND

Minimum Dynamic

Output Current (Note 4)

Maximum Quiescent

5.5

1.65V Max

3.85V Min

OLD

OHD

4.0

80.0

40.0

(Note 5) Supply Current

or GND

Note 3: All outputs loaded; thresholds on input associated with output under test.

Note 4: Maximum test duration 2.0 ms, one output loaded at a time.

Note 5: I and I @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V V .

www.fairchildsemi.com

DC Electrical Characteristics for ACT

25 C

55 C to 125 C

40 C to 85 C

Symbol

Parameter

Units

Conditions

(V)

4.5

5.5

4.5

5.5

4.5

5.5

Typ

1.5

Guaranteed Limits

Minimum HIGH Level

Input Voltage

2.0

0.8

4.4

5.4

2.0

0.8

4.4

5.4

0.1V

OUT

1.5

2.0

0.8

4.4

5.4

or V

Maximum LOW Level

Input Voltage

1.5

OUT

1.5

or V

Minimum HIGH Level

Output Voltage

4.49

5.49

OUT

4.5

5.5

4.5

5.5

3.86

4.86

0.1

3.70

4.70

0.1

3.76

4.76

0.1

24 mA

24 mA (Note 6)

Maximum LOW Level

Output Voltage

0.001

0.1

12 mA

4.5

5.5

0.36

0.1

0.50

1.0

0.44

1.0

24 mA

24 mA (Note 6)

Maximum Input

Leakage Current

Maximum 3-STATE

Current

, GND

5.5

0.25

5.0

1.6

2.5

1.5

, V

, GND

Maximum

0.6

2.1V

CCT

/Input

Minimum Dynamic

Output Current (Note 7)

Maximum Quiescent

Supply Current

5.5

1.65V Max

3.85V Min

OLD

OHD

OLD

OHD

4.0

80.0

40.0

or GND

Note 6: All outputs loaded; thresholds on input associated with output under test.

Note 7: Maximum test duration 2.0 ms, one output loaded at a time.

www.fairchildsemi.com

AC Electrical Characteristics for AC

25 C

55 C to 125 C

50 pF

Max

40 C to 85 C

50 pF

Min Max

Symbol

Parameter

50 pF

Units

(V)

(Note 8)

3.3

Min

2.0

1.5

2.0

1.5

2.0

1.5

2.5

1.5

3.0

2.5

2.0

Typ

Max

9.0

Min

1.0

Propagation Delay

Data to Output

6.5

5.0

6.5

5.0

6.0

5.0

7.5

5.5

7.0

6.5

7.5

6.5

12.5

9.5

1.5

1.0

2.0

1.0

1.5

2.0

1.5

1.0

2.5

2.0

10.0

7.5

PLH

PHL

PZH

PZL

PHZ

PLZ

5.0

7.0

Propagation Delay

Data to Output

3.3

9.0

12.0

9.0

10.0

7.5

5.0

7.0

Output Enable Time

3.3

10.5

7.0

11.5

9.0

11.0

8.0

5.0

Output Enable Time

Output Disable Time

3.3

10.0

8.0

13.0

10.5

12.5

10.5

13.0

11.0

8.5

5.0

3.3

10.0

9.0

10.5

9.5

5.0

3.3

10.5

9.0

11.5

9.5

5.0

Note 8: Voltage Range 3.3 is 3.3V 0.3V

Voltage Range 5.0 is 5.0V 0.5V

AC Electrical Characteristics for ACT

25 C

55 C to 125 C

50 pF

Max

40 C to 85 C

Symbol

Parameter

50 pF

Max

Units

(V)

(Note 9)

5.0

Min

Typ

Max

Min

Propagation Delay

2.0

6.5

9.0

1.0

10.0

1.5

10.0

PLH

Data to Output

Propagation Delay

Data to Output

5.0

2.0

7.0

9.0

1.0

10.0

1.5

10.0

PHL

Output Enable Time

Output Disable Time

5.0

1.5

2.0

2.5

6.0

7.0

7.5

8.5

9.5

1.0

9.5

1.0

1.5

2.0

9.5

PZH

11.0

11.5

10.5

PZL

9.5

PHZ

10.0

PLZ

Note 9: Voltage Range 5.0 is 5.0V 0.5V

Capacitance

Symbol

Parameter

Input Capacitance

Power Dissipation Capacitance

Typ

Units

Conditions

4.5

OPEN

5.0V

45.0

www.fairchildsemi.com

Physical Dimensions inches (millimeters) unless otherwise noted

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

Package Number M20B

www.fairchildsemi.com

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

Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

Package Number M20D

www.fairchildsemi.com

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

20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide

Package Number MSA20

www.fairchildsemi.com

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

20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Package Number MTC20

www.fairchildsemi.com

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

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

Package Number N20A

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.

www.fairchildsemi.com

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74AC244SC产品参数

型号:	74AC244SC
是否无铅：	不含铅
是否Rohs认证：	符合
生命周期：	Active
零件包装代码：	SOIC
包装说明：	SOP,
针数：	20
Reach Compliance Code：	unknown
风险等级：	5.16
Is Samacsys：	N
系列：	AC
JESD-30 代码：	R-PDSO-G20
JESD-609代码：	e3
长度：	12.8 mm
逻辑集成电路类型：	BUS DRIVER
湿度敏感等级：	1
位数：	4
功能数量：	2
端口数量：	2
端子数量：	20
最高工作温度：	85 °C
最低工作温度：	-40 °C
输出特性：	3-STATE
输出极性：	TRUE
封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP
封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260
传播延迟（tpd）：	10 ns
座面最大高度：	2.65 mm
最大供电电压 (Vsup)：	6 V
最小供电电压 (Vsup)：	2 V
标称供电电压 (Vsup)：	3.3 V
表面贴装：	YES
技术：	CMOS
温度等级：	INDUSTRIAL
端子面层：	MATTE TIN
端子形式：	GULL WING
端子节距：	1.27 mm
端子位置：	DUAL
处于峰值回流温度下的最长时间：	30
宽度：	7.5 mm
Base Number Matches：	1

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