73S8014RN 查看數據表（PDF） - Teridian Semiconductor Corporation

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产品描述 (功能)

生产厂家

73S8014RN

Smart Card Interface

Teridian Semiconductor Corporation 

DS_8014RN_014

73S8014RN Data Sheet

3 Applications Information

This section provides general usage information for the design and implementation of the 73S8014RN. The

documents listed in Related Documentation provide more detailed information.

3.1 Example 73S8014RN Schematics

Figure 3 shows a typical application schematic for the implementation of the 73S8014RN.

Note that minor changes may occur to the reference material from time to time and the reader is encouraged to

contact Teridian for the latest information.

3.2 NDS Precautions

Preliminary testing against the NDS specification has found that the coupled noise level on the I/O signal may

approach the maximum NDS limits. Teridian recommends adding capacitor footprints on the CLK, RST and I/O

signals for addition of small capacitors to filter system noise if needed. These footprints should be added at or

near the smart card connector interface. A typical value of 27pF has been found to reduce the noise to

acceptable levels where the noise is an issue. In addition, Teridian recommends the addition of a 0 ohm series

resistor in the CLK path. If the CLK output is found to generate too much system noise, a small resistor can be

substituted to create a small RC network to slow the CLK edges and reduce the CLK noise to the rest of the

system. The amount of the noise being generated from the CLK signal depends on many factors including; board

layout and component placement, clock input source, distance between 8014 and the card interface, etc. Lastly,

some isolation between the CLK signal should be provided against all other system signals, especially the RST

and I/O signals.

Rev. 1.0

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