s-80857cny-z-g Seiko Instruments Inc., s-80857cny-z-g Datasheet - Page 22

• Manufacturer Part Number: s-80857cny-z-g
• Description: Super-small Package High-precision Voltage Detector
• Manufacturer: Seiko Instruments Inc.

22
SUPER-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-808xxC Series
1. Basic Operation: CMOS Output (Active Low)
Operation
1-1. When the power supply voltage (V
1-2. When the V
1-3. When the V
1-4. The V
1-5. When the V
OFF and the Pch transistor is ON to provide V
Figure 17 is OFF, the comparator input voltage is
the detection voltage −V
becomes ON, the Pch transistor becomes OFF, and the V
the Nch transistor N1 in Figure 17 becomes ON, the comparator input voltage is changed to
V
appears even when the V
transistor becomes ON to provide V
R
R
DD
B
A
•
+
when the output is pulled up to the V
V
SS
R
DD
B
level appears when the V
.
DD
DD
DD
falls below the minimum operating voltage, the output becomes undefined, or goes to the
goes below +V
rises above +V
*1. Parasiteic diode
VDD
VSS
DET
DD
. When the V
surpasses −V
*1
DET
DET
V
REF
, the output provides the V
(point B in Figure 18 ), the Nch transistor becomes OFF and the Pch
DD
Seiko Instruments Inc.
DD
DD
Figure 17 Operation 1
) is higher than the release voltage (+V
rises above the minimum operating voltage. The V
R
R
R
level at the output.
A
B
C
DD
DD
DET
.
falls below −V
, as long as it does not exceed the release voltage +V
−
+
DD
(high) at the output. Since the Nch transistor N1 in
N1
R (
R
B
A
+
+
R
R
DET
SS
C
DD
B
)
+
•
level appears at the output. At this time
(point A in Figure 18 ), the Nch transistor
level, as long as the V
R
V
DD
C
Pch
Nch
.
*1
*1
DET
OUT
), the Nch transistor is
DD
remains above
SS
Rev.4.3
level still
_00
DET
.