YB1921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

YB1921

3-Pin Microprocessor Reset Monitor

Features

Introduction

The YB1921 is

supervisor Integrated Circuit (IC) designed to monitor

_CCin digital and mixed signal systems and provide a

a

cost-effective system

z

Precision V_CCMonitor for 2.8V, 3.0V, 3.3V,

and 5.0V Supplies

V

z

140msec Guaranteed Minimum RESET

Output Duration

warning signal when the system power supply is out

of working range, and a reset signal to the host

processor when necessary. No external components

are required.

z

RESET Output Guaranteed to V_CC=1.0V

Low 18μA Supply Current

V_CCTransient Immunity

The reset output is driven active within 20μsec

of V_CCfalling through the reset voltage threshold.

Reset is maintained active for a minimum of 140msec

after V_CCrises above the reset threshold. The YB1921

has an active-low RESET output. The output of the

YB1921 is guaranteed valid down to V_CC=1V.

Small SOT-23 Package

No External Components

Wide Operating Temperature: 0°C to 85°C

The YB1921 is optimized to reject fast transient

glitches on the V_CCline. Low supply current of 18μA

(V_CC=3.3V) makes these devices suitable for battery

powered applications.

Applications

z

Computers

Embedded systems

Battery powered equipment

Critical µP power supply monitoring

Application Diagram

YB1921

www.yobon.com.tw

1

YB1921

3-Pin Microprocessor Reset Monitor

Absolute Maximum Ratings ⁽¹⁾

Parameter

Symbol

Value

Unit

Value

Input Voltage

V_CC

RESET

—

5.5

V

Output Voltage

-0.3 to (Vcc+0.3)

Input Current

20

mA

—

Output Current

I_OUT

P_D

20

Power Dissipation

Internally Limited ⁽³⁾

Infinite

Output Short Circuit Duration

Thermal Resistance, Junction-to-Ambient

Operating Temperature Range

Lead Temperature (Soldering, 10 sec.)

Junction Temperature

Storage Temperature

—

Θ_JA

T_A

230

°C/W

°C

0~85

—

260

°C

T_J

0 to+125

-60 to+150

°C

T_S

°C

Recommended Operating Conditions ⁽²⁾

Parameter

Symbol

Value

Unit

Min

Type.

Max

5.5

Power Supply Voltage

Junction Temperature

V_CC

T_J

2.0

0

—

V

+125

°C

YB1921

www.yobon.com.tw

2

YB1921

3-Pin Microprocessor Reset Monitor

Electrical Characteristics

Vcc=5V for L/M/J; 3.3V for T/S; 3.0V for R, TA = 25°C, unless otherwise specified.

Parameter

Input Voltage

Symbol

V_CC

Condition

—

Min

2.0

Typ

Max

5.5

Unit

V

—

Supply Current

Reset Threshold

I_CC

—

18

25

μA

4.54

4.29

3.92

3.02

2.87

2.58

4.63

4.38

4.00

3.08

2.93

2.63

4.72

4.47

4.08

3.14

2.99

2.68

YB1921L-4.63V

YB1921M-4.38V

YB1921J-4.00V

YB1921T-3.08V

YB1921S-2.93V

YB1921R-2.63V

V_TH

V

Reset Threshold Temperature

Coefficient ⁽⁴⁾

—

30

20

—

ppm/°C

V_CCto Reset Delay V_CC= V_THto

(V_TH– 100mV)

μsec

Reset Active Timeout Period

RESET Output Voltage Low

RESET Output Voltage High

—

240

—

0.4

—

msec

V_OL

V_OH

I_SINK= 3mA

I_SOURCE= 800μA

V

0.8V_CC

—

Note 1: Exceeding the absolute maximum rating may damage the device.

Note 2: The device is not guaranteed to function outside its operating rating.

Note 3: The maximum allowable power dissipation at any T_A(ambient temperature) is calculated using: P_{D (MAX)}

=

(T_{J (MAX)}– T_A)/Θ_JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the

regulator will go into thermal shutdown. See “Thermal Consideration” section for details

Note 4: RESET threshold temperature coefficient is the worst case voltage change divided by the total temperature

range.

YB1921

www.yobon.com.tw

3

YB1921

3-Pin Microprocessor Reset Monitor

Pin Description

Pin Configuration

Pin No.

Symbol

Description

2

RESET

GND

1

GND

Ground

3

VCC

RESET output remains low while Vcc is

below the reset voltage threshold and

for 240msec(typ) after Vcc rises above

reset threshold

RESET

Vcc

2

3

1

Supply Voltage (typ.)

Ordering/Marking Information

Reset Vcc

Package

Part Number

Marking

Marking Information

threshold (V)

Starting with 0,

a bar underlined 0 is for

S809La^•

S809Ma^•

S809Ja^•

S809Ta^•

S809Sa^•

S809Ra^•

4.63

YB1921LB-F

YB1921MB-F

production year 2006, on top of 9 is for year 2007.

And underlined 9 is for year 2008

4.38

4.00

3.08

2.93

2.63

The next character is marked on top of 8 for

2009, and underlined 8 for 2010. The naming

pattern continues with consecutive characters for

later years.

YB1921JB-F

YB1921TB-F

YB1921SB-F

YB1921RB-F

SOT-23

The last character is the week code. (A-Z: 1-26,

a-z: 27-52)

A dot on top right corner is for lead-free process.

Ordering Information

YB1921

www.yobon.com.tw

4

YB1921

3-Pin Microprocessor Reset Monitor

Dimension

Outline Drawing For SOT-23

C

J

H

B

D

A

E

G

F

K

L

INCHES

MILLIMETERS

SYMBOL

MIN

MAX

MIN

MAX

A

B

C

D

E

F

G

H

J

0.110

0.047

0.083

0.035

0.070

0.018

0.015

0.120

0.055

0.104

0.040

0.080

0.024

0.020

0.004

0.040

0.007

0.027

2.80

1.20

2.10

0.89

1.78

0.45

0.37

0.013

0.887

0.085

—

3.04

1.40

2.64

1.03

2.05

0.60

0.51

0.10

1.02

0.18

0.69

0.0005

0.034

0.003

—

K

L

YB1921

www.yobon.com.tw

5

型号:	YB215CWCSW01-N-CB
是否Rohs认证：	符合
生命周期：	Obsolete
IHS 制造商：	NKK SWITCHES OF AMERICA INC
Reach Compliance Code：	unknown
风险等级：	5.77
执行器颜色：	SILVER
执行器行程：	2.9972 mm
执行器类型：	PUSHBUTTON
套管类型：	M16P1
中心触点镀层：	SILVER
触点（交流）最大额定R负载：	3A@125VAC
最大触点电流（交流）：	3 A
触点功能：	ON-(ON)
触点电阻：	0.05 m Ω
最大触点电压（交流）：	125 V
电气寿命：	100000 Cycle(s)
末端触点镀层：	SILVER
外壳材料：	GLASS FILLED POLYAMIDE
绝缘电阻：	200000000 Ω
绝缘体材料：	DIALLYL PHTHALATE
制造商序列号：	YB2
安装特点：	PANEL MOUNT
最高工作温度：	70 °C
最低工作温度：	-25 °C
可焊性：	HAND
表面贴装：	NO
开关动作：	MOMENTARY
开关功能：	SPST
开关类型：	PUSHBUTTON SWITCH
端子长度：	0.288 inch
端子材料：	PHOSPHOR BRONZE
端接类型：	QUICK CONNECT
Base Number Matches：	1

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