GX1 datasheet(197/247 Pages) NSC

197 / 247 page

Revision 1.0

197

www.national.com

Electrical Specifications (Continued)

6.7

AC CHARACTERISTICS

The following tables list the AC characteristics including

output delays, input setup requirements, input hold require-

ments, and output float delays. The rising-clock-edge refer-

ence level VREF, and other reference levels are shown in

Table 6-13. Input or output signals must cross these levels dur-

ing 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 opera-

tion.

All AC tests are performed at VCC2 = 1.52V to 1.68V (1.6V

Nominal), VCC2 = 1.71V to 1.89V (1.8V Nominal), VCC2 =

1.9V to 2.1V (2.0V Nominal), VCC3 = 3.0V to 3.6V (3.3V

Nominal), TC =0

oCto 85oC, R

L = 50 ohms, and CL =50pF

unless otherwise specified

While most minimum, maximum, and typical AC character-

istics are only shown as a single value, they are tested and

guaranteed across the entire processor core voltage range

of 1.6V to 2.0V (nominal). AC characteristics that are

affected significantly by the core voltage or speed grade

are documented accordingly.

Figure 6-4. Drive Level and Measurement Points for Switching Characteristics

Table 6-13. 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

GX1 Datasheet(PDF) 197 Page - National Semiconductor (TI)

GX1 Datasheet(HTML) 197 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL