TMX320C6720RFP300 datasheet(35/118 Pages) TI

35 / 118 page

4.5 Parameter Information

4.5.1

Parameter Information Device-Specific Information

Transmission Line

4.0 pF

1.85 pF

Z0 = 50

Ω

(see note)

Tester Pin Electronics

Data Sheet Timing Reference Point

Output

Under

Test

Ω

3.5 nH

Device Pin

(see note)

4.5.1.1 Signal Transition Levels

Vref = 1.5 V

Vref = VIL MAX (or VOL MAX)

Vref = VIH MIN (or VOH MIN)

4.5.1.2 Signal Transition Rates

TMS320C6727B, TMS320C6726B, TMS320C6722B, TMS320C6720

Floating-Point Digital Signal Processors

www.ti.com

SPRS370E – SEPTEMBER 2006 – REVISED JULY 2008

The data sheet provides timing at the device pin. For output timing analysis, the tester pin electronics and its

transmission line effects must be taken into account. A transmission line with a delay of 2 ns or longer can be used to

produce the desired transmission line effect. The transmission line is intended as a load only. It is not neccessary to

add

subtract

the

transmission

line

delay

longer)

from

the

data

sheet

timings.

Input requirements in this data sheet are tested with an input slew rate of < 4 Volts per nanosecond (4 V/ns) at the

device pin.

Figure 4-1. Test Load Circuit for AC Timing Measurements

All input and output timing parameters are referenced to 1.5 V for both "0" and "1" logic levels.

Figure 4-2. Input and Output Voltage Reference Levels for AC Timing Measurements

All rise and fall transition timing parameters are referenced to VIL MAX and VIH MIN for input clocks,

VOL MAX and VOH MIN for output clocks.

Figure 4-3. Rise and Fall Transition Time Voltage Reference Levels

All timings are tested with an input edge rate of 4 Volts per nanosecond (4 V/ns).

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