TMP320C2811PBKA datasheet(88/147 Pages) TI

88 / 147 page

Electrical Specifications

June 2004

SPRS257

6.8

Signal Transition Levels

Note that some of the signals use different reference voltages, see the recommended operating conditions

table. Output levels are driven to a minimum logic-high level of 2.4 V and to a maximum logic-low level of

0.4 V.

Figure 6−2 shows output levels.

0.4 V (VOL)

20%

2.4 V (VOH)

80%

Figure 6−2. Output Levels

Output transition times are specified as follows:

•

For a high-to-low transition, the level at which the output is said to be no longer high is below 80% of the

total voltage range and lower and the level at which the output is said to be low is 20% of the total voltage

range and lower.

•

For a low-to-high transition, the level at which the output is said to be no longer low is 20% of the total

voltage range and higher and the level at which the output is said to be high is 80% of the total voltage

range and higher.

Figure 6−3 shows the input levels.

0.8 V (VIL)

10%

2.0 V (VIH)

90%

Figure 6−3. Input Levels

Input transition times are specified as follows:

•

For a high-to-low transition on an input signal, the level at which the input is said to be no longer high is

90% of the total voltage range and lower and the level at which the input is said to be low is 10% of the

total voltage range and lower.

•

For a low-to-high transition on an input signal, the level at which the input is said to be no longer low is

10% of the total voltage range and higher and the level at which the input is said to be high is 90% of the

total voltage range and higher.

NOTE: See the individual timing diagrams for levels used for testing timing parameters.

TMP320C2811PBKA Datasheet(PDF) 88 Page - Texas Instruments