XC164CS datasheet(50/71 Pages) INFINEON

50 / 71 page

XC164

Derivatives

Electrical Parameters

Data Sheet

V2.1, 2003-06

4.4

Parameter Interpretation

The parameters listed in the following partly represent the characteristics of the XC164

and partly its demands on the system. To aid in interpreting the parameters right, when

evaluating them for a design, they are marked in column “Symbol”:

CC (Controller Characteristics):

The logic of the XC164 will provide signals with the respective characteristics.

SR (System Requirement):

The external system must provide signals with the respective characteristics to the

XC164.

Overload conditions occur if the standard operating conditions are exceeded, i.e. the voltage on any pin

exceeds the specified range:

VOV > VDDP + 0.5 V (IOV >0) or VOV < VSS - 0.5 V (IOV < 0). The absolute sum

of input overload currents on all pins may not exceed 50 mA. The supply voltages must remain within the

specified limits.

Proper operation is not guaranteed if overload conditions occur on functional pins such as XTAL1, RD, WR,

etc.

Not 100% tested, guaranteed by design and characterization.

An overload current (

IOV) through a pin injects a certain error current (IINJ) into the adjacent pins. This error

current adds to the respective pin’s leakage current (

IOZ). The amount of error current depends on the overload

current and is defined by the overload coupling factor

KOV. The polarity of the injected error current is inverse

compared to the polarity of the overload current that produces it.

The total current through a pin is |

ITOT| = |IOZ| + (|IOV| × KOV). The additional error current may distort the input

voltage on analog inputs.

The timing is valid for pin drivers operating in default current mode (selected after reset). Reducing the output

current may lead to increased delays or reduced driving capability (

CL).

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