BH6456GUL_12 Datasheet, PDF (19/20 Pages) Rohm – System Lens Driver Series for Mobile Phone Cameras 2-wire serial interface Lens Driver for Voice Coil Motor(I2C BUS compatible)

BH6456GUL
Technical Note
10) Regarding the input pin of the IC
This monolithic IC contains P⁺ isolation and P substrate layers between adjacent elements to keep them isolated.
P-N junctions are formed at the intersection of these P layers with the N layers of other elements, creating a parasitic
diode or transistor. For example, the relation between each potential is as follows:
When GND > Pin A, the P-N junction operates as a parasitic diode.
When GND > Pin B, the P-N junction operates as a parasitic diode and transistor.
Parasitic elements can occur inevitably in the structure of the IC. The operation of parasitic elements can result in
mutual interference among circuits, operational faults, or physical damage. Accordingly, methods by which parasitic
elements operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin, should
not be used.
Pin A
N
N ^P+
Resistor
Pin A
P
P⁺ _N
P substrate
Parasitic element
GND
Parasitic
element
Transistor (NPN)
Pin B
C
B
E
N _P+ N
NP
P⁺ _N
P substrate
Parasitic elements
GND
GND
Pin B
B
Other adjacent
elements
C
E
Parasitic
elements
GND
Fig.11 Example of Simple IC Architecture
●Ordering Information
BH6 4 5 6GU ^L
Part Number
Package
VCSP50L1
E2
Packaging and forming specification
E2: Embossed tape and reel
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© 2012 ROHM Co., Ltd. All rights reserved.
19/19
2012.02 - Rev.A