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HT7024A

更新时间： 2024-01-31 21:17:01

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		微控制器和处理器外围集成电路 uCs集成电路 uPs集成电路 LTE
页数	文件大小	规格书
16页	161K
描述
Voltage Detector

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技术参数
数据手册

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HT7024A 技术参数

生命周期：	Obsolete	Reach Compliance Code：	unknown
风险等级：	5.84	Is Samacsys：	N
Base Number Matches：	1

HT7024A 数据手册

HT70XX

HT7050A

Symbol

Ta=25°C

Test Conditions

Conditions

Parameter

Min.

Typ.

Max.

Unit

V_DD

4.75

5.25

Hi®Lo Detectable Voltage

Lo®Hi Detectable Voltage

V_DET

4.845

5.25

5.775

0.02

0.05

0.1

V_HYS

Hysteresis Width

V_DET

I_DD

Operating Current

Operating Voltage

Output Sink Current

No load

2.1

V_DD

I_OL

V_OUT=0.36V

3.6V

DV_DET

Temperature Coefficient

0°C<Ta<70°C

±0.9

mV/°C

HT7070A

Symbol

Ta=25°C

Test Conditions

Conditions

Parameter

Min.

Typ.

Max.

Unit

V_DD

6.65

7.35

Hi®Lo Detectable Voltage

Lo®Hi Detectable Voltage

V_DET

6.783

7.35

8.085

0.02

0.05

0.1

V_HYS

Hysteresis Width

V_DET

I_DD

Operating Current

Operating Voltage

Output Sink Current

No load

2.1

V_DD

I_OL

V_OUT=0.5V

DV_DET

Temperature Coefficient

0°C<Ta<70°C

±0.9

mV/°C

Functional Description

The HT70XX series is a set of voltage detectors

equipped with a high stability voltage reference which is

connected to the negative input of a comparator¾ de-

noted as V_REFin the following figure for NMOS output

voltage detector.

If V_DDfalls below the minimum operating voltage, the

output becomes undefined. When VDD goes from low to

_DD´ R_B/ (R_A+R_B) > V_REF, the comparator output and

V_OUTgoes high.

The detectable voltage is defined as:

When the voltage drop to the positive input of the com-

parator (i,e,V_B) is higher than V_REF, VOUT goes high,

RA + RB + RC

V_DET(-) =

´ V_REF

R^B+ R^C

M1 turns off, and V_Bis expressed as V_BH=V_DD

The release voltage is defined as:

(R_B+R_C) / (R_A+R_B+R_C). If V_DDis decreased so that V_B

falls to a value less than V_REF, the comparator output in-

verts from high to low, V_OUTgoes low, V_Cis high, M1

turns on, RC is bypassed, and V_Bbecomes:

RA + RB

V_DET(+) =

´ V_REF

R^B

_BL=V_DD´R_B/ (R_A+R_B), which is less than V_BH.By so

doing, the comparator output will stay low to prevent the

circuit from oscillating when V_B» V_REF.

Rev. 1.60

January 14, 2003

1...3 4 567 8 9...16

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