s TYPICAL CHARACTERISTICS
MB3761
VO (V) 6
Figure 14. DC Characteristics
4
2
0
0
1
2
3
4
5
6
VCC (V)
Figure 15. Response Characteristics
5
VCC (V)
0
4.4
VO (V)
0
VCCL
VCCH
VCC
VO
tRST
∼ 30 ms
• 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:
{ } VTH
R1
tRST = -C1 R4 • In 1 - VCC (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
9