MB3761_06 Datasheet, PDF (10/15 Pages) Fujitsu Component Limited. – VOLTAGE DETECTOR

MB3761
■ TYPICAL CHARACTERISTICS
DC Characteristics
6
4
2
0
0
1
23
4
5
6
V CC (V)
• Voltage Threshold Levels (VCCL and VCCH) and
Hysteresis Width can be changed by the resistors
(R1 through R4).
R1 + R2 + R3
VCCL =
R3
VTH
R1 (R2 + R3 )
VCCH = VCCL +
R3 R4
VTH
• Power-On Reset Time is provided by the following
approximate equation:
{ ^tRST
VTH
= -C1 R4 • In 1 - _VCC
R1
(1 + _{R2 + R3} )
• The recommended value of hFE of the external
transistor is from 50 to 200.
• In the case of an instant power fail,
the remaining charge in C1 effects tRST.
• If necessary, the reversed output is provided
on HYS terminal
Response Characteristics
5
V CC (L)
V CC
V CC (H)
0
VO
4.4
t RST
0
≈ 30 ms
10