bd45331g ROHM Co. Ltd., bd45331g Datasheet - Page 7

• Manufacturer Part Number: bd45331g
• Description: Counter Timer Built-in Cmos Voltage Detector Ic
• Manufacturer: ROHM Co. Ltd.

1 . Absolute maximum range
2 . GND potential
3 . Electrical Characteristics
4 . Bypass Capacitor for Noise Rejection
5 . Short Circuit between Terminal and Soldering
6 . Electromagnetic Field
7 .
8 .
9 .
10. This IC has extremely high impedance terminals. Small leak current due to the uncleanness of PCB surface might cause unexpected
11. External parameters
12. Power on reset operation
13. Precautions for board inspection
14. When the power supply, is turned on because of in certain cases, momentary Rash-current flow into the IC at the logic unsettled, the couple
Operation Notes
operations. Application values in these conditions should be selected carefully. If the leakage of about 1MΩ is assumed between the ER
terminal and the GND terminal, 100kΩ connection between the ER terminal and the VDD terminal would be recommended. If the leakage
is assumed between the VOUT terminal and the GND terminal, the pull-up resistor should be less than 1/10 of the assumed leak resistance.
Please verify and confirm using practical applications.
capacitance, GND pattern of width and leading line must be considered.
Don’t short-circuit between Output pin and VDD pin, Output pin and GND pin, or VDD pin and GND pin. When soldering the IC on circuit
board, please be unusually cautious about the orientation and the position of the IC. When the orientation is mistaken the IC may be
destroyed.
discharge procedure before each process of the test operation.
sustain ESD damage, and continue observing ESD-prevention procedures in all handing, transfer and storage operations. Before
attempting to connect components to the test setup, make certain that the power supply is OFF. Likewise, be sure the power supply is OFF
before removing any component connected to the test setup.
GND terminal should be a lowest voltage potential every state.
A VDD -GND capacitor (as close connection as possible) should be used in high V
Absolute Maximum Ratings are those values beyond which the life of a device may be destroyed. We cannot be defined the failure mode,
such as short mode or open mode. Therefore a physical security countermeasure, like fuse, is to be given when a specific mode to be
beyond absolute maximum ratings is considered.
Please make sure all pins, which are over ground even if, include transient feature.
Be sure to check the electrical characteristics that are one the tentative specification will be changed by temperature, supply voltage, and
external circuit.
Please put into the capacitor of 1μF or more between VDD pin and GND, and the capacitor of about 1000pF between VOUT pin and GND, to
reject noise. If extremely big capacitor is used, transient response might be late. Please confirm sufficiently for the point.
Mal-function may happen when the device is used in the strong electromagnetic field.
The VDD line inpedance might cause oscillation because of the detection current.
Lower than the mininum input voltage makes the V
The recommended parameter range for RL is 50kΩ～1MΩ. There are many factors (board layout, etc) that can affect characteristics.
Connecting low-impedance capacitors to run inspections with the board may produce stress on the IC. Therefore, be certain to use proper
To prevent electrostatic accumulation and discharge in the assembly process, thoroughly ground yourself and any equipment that could
Please note that the power on reset output varies with the VDD rise up time. Please verify the actual operation.
OUT
high impedance, and it must be V
7/8
DD
line impedance condition.
DD
in pull up (V
DD
) condition.