SUPER-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-808xxC Series
Rev.4.3_00
2-3. Temperature Characteristics of Hysteresis Voltage
∆ + VDET ∆ − VDET
The temperature characteristics for the hysteresis voltage is expressed as
calculated as follows:
−
and is
∆Ta
∆Ta
∆ + VDET ∆ − VDET
VHYS
− VDET
∆ − VDET
∆Ta
−
=
×
∆Ta
∆Ta
Standard Circuit
R*1
100 kΩ
VDD
VSS
OUT
*1. R is unnecessary for CMOS output products.
Figure 20
Caution The above connection diagram and constants do not guarantee correct operation. Perform
sufficient evaluation using the actual application to set the constants.
Technical Terms
1. Detection Voltage (−VDET), Release Voltage (+VDET
)
The detection voltage (−VDET) is a voltage at which the output turns to low. The detection voltage varies slightly
among products of the same specification. The variation of detection voltage between the specified minimum
(−VDET) Min. and the maximum (−VDET) Max. is called the detection voltage range (Refer to Figure 21).
Example: For the S-80815CN, the detection voltage lies in the range of 1.470≤(−VDET)≤1.530.
This means that some S-80815CNs have 1.470 V for −VDET and some have 1.530 V.
The release voltage (+VDET) is a voltage at which the output turns to high. The release voltage varies slightly
among products of the same specification. The variation of release voltages between the specified
minimum (+VDET) Min. and the maximum (+VDET) Max. is called the release voltage range (Refer to Figure
22). The range is calculed from the actual detection voltage (−VDET) of a product and is expressed by
−VDET×1.03≤+VDET≤−VDET ×1.08.
Example: For the S-80815CN, the release voltage lies in the range of 1.514≤(+VDET)≤1.652.
This means that some S-80815CNs have 1.514 V for +VDET and some have 1.652 V.
24
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