BU4538芯片引脚定义引脚图及功能IC贸易商引脚图技术参数-中国IC网-芯三七

Standard ICs

Dual precision monostable

multivibrator

BU4538B

The BU4538B is a monostable multivibrator that can be reset and retriggered. It is triggered from either edge of an

input pulse. As the output pulse width and accuracy are determined by the external timing constants Cx and Rx, a

wide range of accurate output pulse widths is available. Linear CMOS technology makes it possible to control the

output pulse width with greater accuracy. Determination is made based on t^WOUT= Rx · Cx throughout the entire

power supply voltage range, eliminating the necessity for other coefficients.

Features

•

1) Low power dissipation.

4) High fan-out.

2) Wide range of operating power supply voltages.

3) High input impedance.

5) Direct drive of 2 L-TTL inputs and 1 LS-TTL input.

Block diagram

•

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

T1A

T^2A

CDA

AA

VDD

T^1B

T2B

BA

T1

T2

C^D

Q

CDB

AB

BA

T1

T2

BB

QA

C^D

Q

QA

QB

V^SS

Logic circuit diagram

Truth table

•

INPUT

OUTPUT

VDD

A

B

H

L

C^D

H

L

Q

RX

C^X

2 (14)

L

H

T2

6 (10)

7 (9)

R

S

Q

Vref1

Enable

V^ref2

Enable

1 (15)

H

L

T¹

Output

Latch

4 (12)

A

Control

Q

X

L

H

B

5 (11)

Q

CD

S

Reset Latch

R

3 (13)

1

Standard ICs

BU4538B

Absolute maximum ratings (Ta = 25°C, VSS = 0V)

•

Parameter

Power supply voltage

Power dissipation

Operating temperature

Storage temperature

Input voltage

Symbol

V^DD

Limits

Unit

V

– 0.3 ~ + 18

1000 (DIP)

Pd

mW

°C

V

Topr

Tstg

V^IN

– 40 ~ + 85

– 55 ~ + 150

– 0.3 ~ VDD + 0.3

Electrical characteristics

•

DC characteristics (unless otherwise noted, Ta = 25°C, V^SS= 0V)

Parameter

Symbol

Min.

Typ.

Max.

Unit

V

Conditions

V^DD(V)

5

—

3.5

7.0

11.0

—

Input high level voltage

V^IH

10

15

5

—

1.5

3.0

4.0

0.3

– 0.3

—

Input low level voltage

V^IL

V

10

15

5

—

Input high level current

Input low level current

I^IH

I^IL

µA

V^IH= 15V

V^IL= 0V

—

4.95

9.95

14.95

—

V^OH

V^OL

I^OH

I^OL

V

10

15

5

I^O= 0mA

Output high level voltage

Output low level voltage

Output high level current

Output low level current

Static current dissipation

—

0.05

—

V

10

15

5

—

– 0.16

– 0.4

– 1.2

0.44

1.1

3.0

—

VOH = 4.6V

V^OH= 9.5V

V^OH= 13.5V

VOL = 0.4V

V^OL= 0.5V

V^OL= 1.5V

—

mA

µA

10

15

5

—

10

15

5

—

20

—

I^DD

40

10

15

V^I= VDD or GND

—

80

2

Standard ICs

BU4538B

Switching characteristics (unless otherwise noted, Ta = 25°C, CL = 50pF, VSS = 0V)

Parameter

Symbol

Min.

Typ.

Max.

Unit

Conditions

—

V

DD

(V)

—

100

50

—

5

Output rise time

t^TLH

ns

10

15

5

—

40

—

100

50

—

Output fall time

t^THL

—

ns

µs

ms

10

15

5

—

40

—

300

150

100

250

125

95

—

Propagation delay

time A, B to Q, Q

t^PLH

tPHL

—

10

15

5

—

Propagation delay

time C^Dto Q, Q

t^PLH

tPHL

—

10

15

5

—

50

—

Minimum input

pulse width

t^WIN

—

30

—

10

15

5

—

25

—

185

8.8

—

200

9.4

0

215

10.0

—

t^WOUT1

10

15

5

C^X= 2000pF, RX = 100kΩ

C^X= 0.1µF, R^X= 100kΩ

Output pulse width 1

Output pulse width 2

t^WOUT2

10

15

5

Minimum retrigger

time

t^rr

—

0

—

ns

10

15

—

0

—

C^IN

—

5

—

pF

Input capacitance

Recommended operating conditions

•

Parameter

Symbol

R^X

Min.

Typ.

—

Max.

1000

Unit

kΩ

Conditions

—

External timing resistance

External timing capacitance

5

C^X

No Limit

pF

3

Standard ICs

BU4538B

Timing chart

•

A

B

C^D

Q

tW

t2

t3

tW

t1

t1, t2, t3 < tW

Measurement circuits

•

VDD

RX

CX

V^DDT2 T1

A

Q

B

CD

P. G. P. G.

CL

P. G.

VSS

Fig. 1 (a) Switching time

20ns

90%

50%

10%

20ns

A

B

20ns

90%

50%

10%

20ns

C^D

90%

50%

10%

tTLH

tPHL

t^rr

tPLH tTHL

tWOUT

tPLH

90%

50%

tPHL

50%

tPHL

50%

10%

Q

tPHL

tTLH

tTHL

90%

50%

10%

tWOUT

Fig. 1 (b) Switching time measurement waveforms

4

Standard ICs

BU4538B

Electrical characteristic curve

•

1200

1000

800

600

400

200

0

25

50

75

100

125

150

AMBIENT TEMPERATURE: Ta (°C)

Fig. 2 Power dissipation vs. Ta

External dimensions (Units: mm)

•

19.4 ± 0.3

16

1

9

8

7.62

2.54

0.5 ± 0.1

0° ~ 15°

DIP16

5

型号:	BU4538B
是否无铅：	不含铅
是否Rohs认证：	符合
生命周期：	Obsolete
IHS 制造商：	ROHM CO LTD
零件包装代码：	DIP
包装说明：	ROHS COMPLIANT, DIP-16
针数：	16
Reach Compliance Code：	compliant
HTS代码：	8542.39.00.01
风险等级：	5.2
Is Samacsys：	N
其他特性：	RETRIGGERABLE
系列：	4000/14000/40000
JESD-30 代码：	R-PDIP-T16
JESD-609代码：	e2
长度：	19.4 mm
逻辑集成电路类型：	MONOSTABLE MULTIVIBRATOR
数据/时钟输入次数：	2
功能数量：	2
端子数量：	16
最高工作温度：	85 °C
最低工作温度：	-40 °C
输出极性：	COMPLEMENTARY
封装主体材料：	PLASTIC/EPOXY
封装代码：	DIP
封装等效代码：	DIP16,.3
封装形状：	RECTANGULAR
封装形式：	IN-LINE
峰值回流温度（摄氏度）：	260
电源：	5/15 V
认证状态：	Not Qualified
座面最大高度：	4.55 mm
子类别：	Prescaler/Multivibrators
最大供电电压 (Vsup)：	16 V
最小供电电压 (Vsup)：	3 V
标称供电电压 (Vsup)：	5 V
表面贴装：	NO
技术：	CMOS
温度等级：	INDUSTRIAL
端子面层：	Tin/Copper (Sn/Cu)
端子形式：	THROUGH-HOLE
端子节距：	2.54 mm
端子位置：	DUAL
处于峰值回流温度下的最长时间：	10
宽度：	7.62 mm
Base Number Matches：	1

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