S-80730AN Seiko Instruments Inc, S-80730AN Datasheet - Page 41

• Manufacturer Part Number: S-80730AN
• Description: HIGH-PRECISION VOLTAGE DETECTOR
• Manufacturer: Seiko Instruments Inc

Collection of Product FAQs
Author: Hamaguchi Masanao
<Information level>
<Product>
Related Documents:
Question:
Answer:
A:
Index:
Division name: 01 IC
Category 1:
Category 2:
Cal No.:
What is the method for calculating delay-time of the power-on clear circuit?
The delay time (power-on clear time) produced in a power-on clear circuit using the S-807xxAN can be
found by substituting constants in the following formula:
Tdelay: Delay time [sec]
C: External capacitance value [F]
R: Resistance value [ ]
V det+: S-807xxAN Series release voltage [V]
Vdd: Supply voltage [V]
Vdd
Note: Set R to less than 7.5 k
Tdelay
=
R
1
C
×
C
S-807xxAN
×
Public (Printing O.K.)
B: Technical
11 Power Supply
1. Voltage Detectors
S-807
R
×
Ln
1 (
-
Vdet
Vdd
Pull-up resistor
Date: 98/11/12 (Thursday) 10:17 (Modified: 98/12/14 (Monday) 16:42)
to prevent oscillation.
+
)
40
V
Delay time
S-807 input voltage
S-807xxAN release voltage (Vdet+)
Supply voltage (Vdd)