TMS320F243 datasheet(75/116 Pages) TI

75 / 116 page

TMS320F243, TMS320F241

DSP CONTROLLERS

SPRS064B – DECEMBER 1997 – REVISED FEBRUARY 1999

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

PARAMETER MEASUREMENT INFORMATION

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

110-pF typical load-circuit capacitance

Figure 17. Test Load Circuit

signal transition levels

The data in this section is shown for the 5-V version. Note that some of the signals use different reference

voltages, see the recommended operating conditions table. TTL-output levels are driven to a minimum

logic-high level of 2.4 V and to a maximum logic-low level of 0.7 V.

Figure 18 shows the TTL-level outputs.

0.7 V (VOL)

20%

2.4 V (VOH)

80%

Figure 18. 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.

Figure 19 shows the TTL-level inputs.

0.7 V (VIL)

10%

2.0 V (VIH)

90%

Figure 19. TTL-Level Inputs

TTL-compatible input transition times are specified as follows:

D 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.

D 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.

TMS320F243 Datasheet(PDF) 75 Page - Texas Instruments

TMS320F243 Datasheet(HTML) 75 Page - Texas Instruments

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