GXM datasheet(186/244 Pages) NSC

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186

Revision 3.1

Electrical Specifications (Continued)

7.6

AC CHARACTERISTICS

The following tables list the AC characteristics including

output delays, input setup requirements, input hold

requirements and output float delays. The rising-clock-

edge reference level VREF, and other reference levels are

shown in Table 7-6.

Input or output signals must cross

these levels during testing.

Input setup and hold times are specified minimums that

define the smallest acceptable sampling window for which

a synchronous input signal must be stable for correct oper-

ation.

All AC tests are at VCC2 = 2.75V to 3.05V (2.9V nominal),

TC =0

oCto 70oCor85o,C

L = 50 pF unless otherwise

specified.

Figure 7-1. Drive Level and Measurement Points for Switching Characteristics

Table 7-6. Drive Level and Measurement Points

for Switching Characteristics

Symbol

Voltage (V)

VREF

1.5

VIHD

2.4

VILD

0.4

CLK

OUTPUTS

INPUTS

VIHD

VILD

VREF

Valid Input

Valid Output n+1

Valid Output n

VREF

VILD

VIHD

Min

Max

Legend: A = Maximum Output Delay Specification

B = Minimum Output Delay Specification

C = Minimum Input Setup Specification

D = Minimum Input Hold Specification

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