S-80733AL Seiko Instruments Inc, S-80733AL Datasheet - Page 25

• Manufacturer Part Number: S-80733AL
• Description: HIGH-PRECISION VOLTAGE DETECTOR
• Manufacturer: Seiko Instruments Inc

HIGH-PRECISION VOLTAGE DETECTOR
S-807 Series
24



1. Detection voltage (-V
2. Release voltage (+V
3. Hysteresis width (V
4. Through-type current
Technical Terms
Detection voltage -V
“CMOS active low output” configurations the output goes low on detection. It goes high in products with CMOS active high
output configurations. This detection voltage varies slightly among products of the same type. The variation of voltages
between the specified minimum [(-V
Figure 9.)
Release voltage +V
CMOS active low output configurations, and low for CMOS active high output configurations). The value of this voltage for
any single unit lies in a range determined from the value of that unit’s detection voltage (see Figure 10):
When calculating the overall release voltage range for S-807 Series products, care must be taken to consider the variation in
the series’ detection voltage values. The minimum and maximum values for release voltage [(+V
must be determined using (-V
Hysteresis width is the voltage difference between a device’s detection voltage and its release voltage (see Figure 14.
V
Through-type current refers to the instantaneous current flow which occurs at the moment a voltage detector output toggles.
This current is quite large in devices with CMOS configured outputs, and also occurs to some extent in Nch open-drain
configured devices. S-807 Series voltage detectors are specially designed to limit through-type currents and are superior to
S-805 Series devices in this respect. (See current consumption characteristics.)
HYS
Example : For the S-80745AN, detection voltage lies in the range
Example : For an S-80745AN with -V
Example : For S-80745AN voltage detectors, release voltage lies in the range 4.480 (+V
Note :
=B-A). By giving a device hysteresis, erroneous toggling of the output due to noise at the input is avoided.
(-V
(-V
DET
DET
)max.
)min.
V
OUT
DD
4.392 (-V
(-V
For an S-80745AN with -V
(+V
(+V
Detection voltage(-V
(-V
DET
DET
DET
DET
DET
) 1.02 (+V
).
)min.=[(-V
)max.=[(-V
DET
HYS
Figure 9
is the voltage at which a unit’s output returns (is “released”) to its inactive state (high for Nch and
DET
DET
is the voltage at which the detector’s output goes active. In products with “Nch open-drain” and
DET
)
) 4.608.
)
)
DET
DET
DET
DET
)min. and (-V
)min.] 1.02;
) (-V
)max.] 1.08.
DET
Detection voltage
DET
Detection voltage range
) and Release voltage(+V
DET
)min.] and maximum [(-V
DET
DET
) 1.08.
=4.608, release voltage lies in the range 4.700 (+V
=4.392, release voltage lies in the range 4.480 (+V
Seiko Instruments Inc.
DET
)max.:
(+V
(+V
DET
DET
DET
DET
) range equally from 4.480V to 4.608V, however, (+V
Release voltage
)max.
)min.
)max.] values is called the detection voltage range. (See
Figure 10
DET
Release voltage range
DET
DET
) 4.977.
) 4.997.
) 4.743.
DET
OUT
V
)min. and (+V
DD
DET
)max.)]
DET
) >