TM320LC203 datasheet(43/83 Pages) TI

43 / 83 page

TMS320C203, TMS320C209, TMS320LC203

DIGITAL SIGNAL PROCESSORS

SPRS025B – JUNE 1995 – REVISED AUGUST 1998

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

PARAMETER MEASUREMENT INFORMATION FOR ’C203/’LC203

Tester Pin

Electronics

VLOAD

IOL

IOH

Output

Under

Test

Ω

Where:

IOL

2 mA (all outputs)

IOH

300

µA (all outputs)

VLOAD =

1.5 V

60-pF typical load-circuit capacitance

Figure 4. Test Load Circuit

signal-transition levels

The data in this section is shown for both the 5-V version (’C203) and the 3.3-V version (’LC203). In each case,

the 5-V data is shown followed by the 3.3-V data in parentheses. Note that some of the signals use different

reference voltages, see the recommended operating conditions tables for 5-V and 3.3-V devices. TTL-output

levels are driven to a minimum logic-high level of 2.4 V (2.4 V) and to a maximum logic-low level of 0.7 V (0.4 V).

Figure 5 shows the TTL-level outputs.

0.7 V (0.4 V)

20%

2.4 V (2.4 V)

80%

Figure 5. TTL-Level Outputs

TTL-output transition times are specified as follows:

D 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.

D 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.

TM320LC203 Datasheet(PDF) 43 Page - Texas Instruments

TM320LC203 Datasheet(HTML) 43 Page - Texas Instruments

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