CDC318

1-LINE TO 18-LINE CLOCK DRIVER

SCAS587B – JANUARY 1997 – REVISED MARCH 1998

8

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

From Output

Under Test

CL = 30 pF

(see Note A)

LOAD CIRCUIT FOR tpd AND tsk

S1

6 V

Open

GND

500

Ω

500

Ω

TEST

tPLH /tPHL

tPLZ /tPZL

tPHZ /tPZH

S1

Open

6 V

GND

Output

Enable

(high-level

enabling)

Output

Waveform 1

S1 at 6 V

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

VOL

VOH

tPZL

tPZH

tPLZ

tPHZ

1.5 V

1.5 V

≈ 3 V

0 V

1.5 V

VOL + 0.3 V

1.5 V

VOH – 0.3 V

≈ 0 V

VCC

3 V

0 V

1.5 V

1.5 V

tw

Input

VOLTAGE WAVEFORMS

VOLTAGE WAVEFORMS

VOLTAGE WAVEFORMS

tPLH

tPHL

Output

1.5 V

1.5 V

3 V

0 V

1.5 V

VOH

VOL

Input

0.4 V

2.4 V

tr

tf

0.4 V

From Output

Under Test

CL = 30 pF

(see Note A)

LOAD CIRCUIT FOR tr AND tf

2.4 V

NOTES: A. CL includes probe and jig capacitance.

B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.

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

≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.

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

Figure 1. Load Circuit and Voltage Waveforms