SN74AC74EP

DUAL POSITIVEEDGETRIGGERED DTYPE FLIPFLOP

WITH CLEAR AND PRESET

SCAS721 − OCTOBER 2003

5

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

50% VCC

50% VCC

50% VCC

50% VCC

VCC

VCC

0 V

0 V

th

tsu

VOLTAGE WAVEFORMS

Data Input

tPLH

tPHL

tPHL

tPLH

VOH

VOH

VOL

VOL

50% VCC

50% VCC

VCC

0 V

50% VCC

50% VCC

Input

Out-of-Phase

Output

In-Phase

Output

Timing Input

50% VCC

VOLTAGE WAVEFORMS

From Output

Under Test

CL = 50 pF

(see Note A)

LOAD CIRCUIT

S1

2

× VCC

500

Ω

500

Ω

Open

tPLH/tPHL

Open

TEST

S1

VCC

0 V

50% VCC

50% VCC

tw

VOLTAGE WAVEFORMS

Input

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 v 2.5 ns, tf v 2.5 ns.

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

Figure 1. Load Circuit and Voltage Waveforms