SN65LVCP23

SLLS554C − NOVEMBER 2002 − REVISED SEPTEMBER 2004

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7

PARAMETER MEASUREMENT INFORMATION

IN+

VID

VOD

VIN−

VIN+

VOZ

VOY

IIN−

IIN+

IN+ +IN−

VIC

2

VOUT++VOUT−

2

IN−

OUT +

OUT −

Figure 1. Voltage and Current Definitions

VOD

VTT = VCC −2 V

Y

Z

50

Ω

50

Ω

Driver

Device

Receiver

Device

Figure 2. Typical Termination for LVPECL Output Driver

1.4 V

1 V

tPLHD

0.4 V

0 V

VIN+

VIN−

VID

80%

tPHLD

20%

tHLT

tLHT

+VOD

0 V

OUT+

OUT−

IN+

IN−

VID

1 pF

VIN−

VIN+

−0.4 V

VOUT−

50

Ω

VOUT+

VOD

−VOD

Vdiff = (OUT+) − (OUT−)

50

Ω

VTT

VTT

NOTE: All input pulses are supplied by a generator having the following characteristics: tr or tf ≤ 0.25 ns, pulse-repetition rate (PRR) = 0.5 Mpps,

pulse width = 500

±10 ns; CL includes instrumentation and fixture capacitance within 0,06 mm of the D.U.T.

Figure 3. Timing Test Circuit and Waveforms