Rev.1.3
HIGH-PRECISION VOLTAGE DETECTOR WITH A
BUILT-IN DELAY CIRCUIT
S-801 Series
The S-801 Series is a high-precision voltage detector with a built-in delay
time generater of fixed time developed using CMOS process. The
detection voltage is fixed internally, with an accuracy of ±2.0%. Internal
oscillator and counter timer can delay the release signal for a fixed time
with no external attachment part. Three delay times, 50 ms typ., 100ms
typ., or 200 ms typ. are available. Two output types, Nch open-drain and
CMOS output, are available.
s Features
s Applications
• Ultra-low current consumption
• Power monitor for portable equipment such as note type
personal computers, digital cameras, PDA devices, and
1.3 µA typ. (at VDD=3.5 V)
• Hysteresis characteristics
portable phone.
60 mV typ.
• Constant voltage power monitor for cameras, video
• Three delay times
equipment and communication devices.
A series : 50 ms typ.
• Power monitor for microcomputers and reset for CPUs.
B series : 100 ms typ.
C series : 200 ms typ.
• High-precision detection voltage
±2.0%
• ON/OFF switch of delay time (DS pin)
• Operating voltage
0.95 to 10.0 V
• Detection voltage
2.2 to 6.0 V (0.1V step)
• Output
Nch open-drain active low or CMOS active low output
s Package
5 pin, SOT-23-5 (See PKG code, MP005-A)
s Block Diagram
(1)
Nch open-drain active low output
(2) CMOS active low output
5
5
VDD
VDD
DELAY CIRCUIT
DELAY CIRCUIT
OUT
OSCILLATOR
COUNTER
TIMER
∗
OUT
OSCILLATOR
COUNTER
TIMER
4
∗
4
∗
VREF
VREF
VSS
VSS
2
2
4
1
1
DS
DS
* Parasitic diode
Figure 1 Block Diagram (Nch open-drain)
Figure 2 Block Diagram (CMOS)
Seiko Instruments Inc.
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