STW5095 datasheet(49/69 Pages) STMICROELECTRONICS

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STw5095

7 Timing Specifications

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Timing Specifications

Unless otherwise specified, VCCIO = 1.71V to 2.7V,Tamb = -30°C to 85°C, max capacitive load

20 pF; typical characteristics are specified at VCCIO = 2.4 V, Tamb = 25 °C; all signals are

referenced to GND, see Note below figure for timing definitions.

Note:

A signal is valid if it is above VIH or below VIL and invalid if it is between VIL and VIH. For the

purpose of this specification the following conditions apply (see Figure 12 above):

a) All input signal are defined as: VIL =0.2•VCCIO, VIH =0.8•VCCIO, tR < 10ns, tF < 10ns.

b) Delay times are measured from the inputs signal valid to the output signal valid.

c) Setup times are measured from the data input valid to the clock input invalid.

d) Hold times are measured from the clock signal valid to the data input invalid.

Note:

All timing specifications subject to change.

Figure 12. A.C. testing input-output waveform

AC Testing: inputs are driven at 0.8

•VCCIO for a logic ‘1’ and 0.2•VCCIO for a logic ‘0’.

Timing measurements are made at 0.7

•VCCIO for a logic ‘1’ and 0.3•VCCIO for a logic ‘0’.

TEST POINTS

0.7

•VCCIO

0.3

•VCCIO

0.7

•VCCIO

0.3

•VCCIO

0.8

•VCCIO

0.2

•VCCIO

INPUT

⁄ OUTPUT

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