CY54FCT480T, CY74FCT480T

DUAL 8-BIT PARITY GENERATORS/CHECKERS

SCCS025B – MAY 1993 – REVISED OCTOBER 2001

8

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

FOR OPEN-DRAIN OUTPUTS

tPHL

tPLH

VCC

0 V

Input

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

NOTES: A. CL includes probe and jig capacitance.

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

≤ 1 MHz, ZO = 50 Ω, tr ≤ 3 ns, tf ≤ 3 ns.

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

From Output

Under Test

CL

(see Note A)

Test

Point

LOAD CIRCUIT FOR

OPEN-DRAIN OUTPUTS

1.5 V

1.5 V

500

Ω

Output

7 V

VOL

≈VCC

1.5 V

VOL + 0.3 V

500

Ω

Figure 2. Load Circuit and Voltage Waveforms