MB94R215B Datasheet, PDF (6/18 Pages) Fujitsu Component Limited. – Microcontroller for Multiapplication SmartCard

MB94R215B
s HANDLING DEVICES
1. Preventing Latchup
Latch-up may occur in a CMOS IC if a voltage greater than VCC or less than VSS is applied to an input or output
pin, or if an above-rating voltage is applied between VCC and VSS. A latchup, if it occurs, significantly increases
the power supply current and may cause thermal destruction of an element. When you use a CMOS IC, be very
careful not to exceed the absolute maximum rating.
2. Treatment of N.C. pins
Be sure to use NC pins in open state.
3. Rising time for power supply voltage
Ensure that the power supply rise time is 100 µs or less when using contact mode operation but, which may
cause misoperation resulting in the corruption of FRAM data.
4. Power supply off time
Ensure that the power supply off time is 1ms or longer when using contact mode operation.
5. Magnetic field strength rise time
See the “s RF INTERFACE in CONTACTLESS OPERATION” section for points to note regarding contactless
operation.
6. When using both contact and contactless operation
When operating in contact mode, ensure there is no RF input from the antenna. When operating in contactless
mode, ensure that the contact terminals are open circuit.
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