Datasheet

Datasheet

9/12

BU4030B

BU4030BF

TSZ02201-0RDR1GZ00040-1-2

© 2013 ROHM Co., Ltd. All rights reserved.

09.Aug.2013 Rev.001

www.rohm.com

TSZ22111・15・001

Operational Notes - continued

9.

Testing on Application Boards

When testing the IC on an application board, connecting a capacitor directly to a low-impedance output pin may subject

the IC to stress. Always discharge capacitors completely after each process or step. The IC’s power supply should

always be turned off completely before connecting or removing it from the test setup during the inspection process. To

prevent damage from static discharge, ground the IC during assembly and use similar precautions during transport and

storage.

10. Inter-pin Short and Mounting Errors

Ensure that the direction and position are correct when mounting the IC on the PCB. Incorrect mounting may result in

damaging the IC. Avoid nearby pins being shorted to each other especially to ground, power supply and output pin.

Inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and

unintentional solder bridge deposited in between pins during assembly to name a few.

11. Unused Input Pins

Input terminals of an IC are often connected to the gate of a MOS transistor. The gate has extremely high impedance

and extremely low capacitance. If left unconnected, the electric field from the outside can easily charge it. The small

charge acquired in this way is enough to produce a significant effect on the conduction through the transistor and

cause unexpected operation of the IC. So unless otherwise specified, unused input pins should be connected to the

power supply or ground line.

12. Regarding the Input Pin of the IC

In the construction of this IC, P-N junctions are inevitably formed creating parasitic diodes or transistors. The operation

of these parasitic elements can result in mutual interference among circuits, operational faults, or physical damage.

Therefore, conditions which cause these parasitic elements to operate, such as applying a voltage to an input pin lower

than the ground voltage should be avoided. Furthermore, do not apply a voltage to the input terminals when no power

supply voltage is applied to the IC. Even if the power supply voltage is applied, make sure that the input pins have

voltages within the values specified in the electrical characteristics of this IC.

13. Ceramic Capacitor

When using a ceramic capacitor, determine the dielectric constant considering the change of capacitance with

temperature and the decrease in nominal capacitance due to DC bias and others.

Ordering Information

B

U

4

0

3

0

B

x

-

E 2

Part Number.

Package

None : DIP14

F

: SOP14

Packaging and forming specification

None : Tube

E2

: Embossed tape and reel

Marking Diagrams

SOP14(TOP VIEW)

BU4030 BF

Part Number Marking

LOT Number

1PIN MARK

DIP14 (TOP VIEW)

BU4030 B

Part Number Marking

LOT Number