VOLTAGE DETECTOR WITH SENSE PIN
S-1002 Series
Rev.1.1_02
Explanation of Terms
1. Detection voltage (−VDET
)
The detection voltage is a voltage at which the output in Figure 18 or Figure 19 turns to "L". 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 16).
Example: In the S-1002Cx18, the detection voltage is either one in the range of 1.778 V ≤ −VDET ≤ 1.822 V.
This means that some S-1002Cx18 have −VDET = 1.778 V and some have −VDET = 1.822 V.
2. Release voltage (+VDET
)
The release voltage is a voltage at which the output in Figure 18 or Figure 19 turns to "H". The release voltage
varies slightly among products of the same specification. The variation of release voltage between the specified
minimum (+VDET min.) and the maximum (+VDET max.) is called the release voltage range (Refer to Figure 17). The
range is calculated from the actual detection voltage (−VDET) of a product and is in the range of −VDET × 1.03 ≤
+VDET ≤ −VDET × 1.07.
Example: For the S-1002Cx18, the release voltage is either one in the range of 1.832 V ≤ +VDET ≤ 1.949 V.
This means that some S-1002Cx18 have +VDET = 1.832 V and some have +VDET = 1.949 V.
VSENSE
Detection voltage
Release voltage
+VDET max.
−VDET max.
−VDET min.
Release voltage
range
Detection voltage
range
+VDET min.
VSENSE
VOUT
VOUT
tRESET
tDET
Figure 16 Detection Voltage
Figure 17 Release Voltage
R
VDD
VDD
100 kΩ
VDD
VDD
OUT
OUT
SENSE
VSS
SENSE
VSS
+
+
+
+
V
V
V
V
Figure 18 Test Circuit of Detection Voltage
and Release Voltage
Figure 19 Test Circuit of Detection Voltage
and Release Voltage
(Nch open-drain output product)
(CMOS output product)
14
SII [ SEIKO INSTRUMENTS INC ]
