88CXX-AF5-R(2005) 데이터 시트보기 (PDF) - Unisonic Technologies

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88CXX-AF5-R
(Rev.:2005)

BUILT-IN DELAY CIRCUIT HIGH-PRECISION VOLTAGE DETECTOR

Unisonic Technologies 

88CXX

CMOS IC

Cautions

*The open of CD terminal may cause double pulses shown in Figure 8 at release. If the double pulses cause a

trouble, attach 10pF or larger capacitor to the CD terminal. Do not apply the voltage to the CD terminal.

Time

Figure 8

*Layout the print circuit board not to apply or flow out the current to/from the CD terminal. Doing not so may cause

inaccurate delay time.

*Use an external capacitor, CD of which leakage current can be ignored for the built-in constant-current value. A

leakage current may cause an error of delay time. Also, a leakage current over the built-in constant-current

causes unrelease status.

3. Other characteristics

(1) Temperature characteristic of detection voltage.

The temperature characteristics of the detection voltage are expressed by the oblique line parts in Figure 9.

-VDET (V)

1.500

+0.54mV/℃

-0.54mV/℃

-40

25

85

Ta(℃)

Figure 9

(2) Temperature characteristics of release voltage

Δ+VDEF

The temperature factor (

) of the release voltage is calculated by the temperature factor of the

detection voltage as follows: ΔTa

∆ + V DET

∆ Ta

=

+ VDET

- VDET

×

∆ - V DET

∆ Ta

The temperature factor of the release voltage has a same sign characteristics as the temperature factor of the

detection voltage.

(3) Temperature characteristics of hysteresis voltage

The temperature characteristics of hysteresis voltage (

Δ+VDEF

ΔTa

Δ-VDEF

- ΔTa

) is calculated as follows:

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

10

QW-R502-040,A

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