CDC111

1-LINE TO 9-LINE DIFFERENTIAL LVPECL CLOCK DRIVER

SCAS321G – SEPTEMBER 1993 – REVISED AUGUST 1999

4

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

From Output

Under Test

LOAD CIRCUIT

tPLH

VCC – 0.9 V

VCC – 1.7 V

CLKIN

ZO = 50 Ω

50

Ω

VOH

VOL

VCC – 2 V

Y

Outputs

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

tPLH

tPHL

VCC – 0.9 V

VCC – 1.7 V

OE

VOH

VOL

Y

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

Y

tPLH

tPHL

50%

tPHL

50%

tr

tf

VOH

VOL

Y, Y

Outputs

80%

20%

80%

20%

VOLTAGE WAVEFORMS

RISE AND FALL TIMES

CLKIN

Waveform 1

NOTES: A. All input pulses are supplied by generators having the following characteristics: PRR

≤ 45 MHz, ZO = 50 Ω, tr ≤ 1 ns, tf ≤ 1 ns.

B. Waveform 1 is for a Y output with internal conditions such that the output is high except when disabled by the output control, and

for a Y output with internal conditions such that the output is low except when disabled by the output control.

C. The outputs are measured one at a time with one transition per measurement.

Figure 1. Load Circuit and Voltage Waveforms