CY74FCT2374ATQCTG4 데이터 시트보기 (PDF) - Conexant Systems

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CY74FCT2374ATQCTG4

8-BIT REGISTER WITH 3-STATE OUTPUTS

Conexant Systems 

CY74FCT2374T

8-BIT REGISTER

WITH 3-STATE OUTPUTS

SCCS040A – SEPTEMBER 1994 – REVISED OCTOBER 2001

PARAMETER MEASUREMENT INFORMATION

From Output

Under Test

CL = 50 pF

(see Note A)

Test

Point

500 Ω

From Output

Under Test

CL = 50 pF

(see Note A)

500 Ω S1

500 Ω

7V

Open

GND

TEST

tPLH/tPHL

tPLZ/tPZL

tPHZ/tPZH

S1

Open

7V

Open

LOAD CIRCUIT FOR

TOTEM-POLE OUTPUTS

LOAD CIRCUIT FOR

3-STATE OUTPUTS

Input

tw

1.5 V

3V

1.5 V

0V

VOLTAGE WAVEFORMS

PULSE DURATION

3V

Timing Input

1.5 V

0V

th

tsu

3V

Data Input

1.5 V

1.5 V

0V

VOLTAGE WAVEFORMS

SETUP AND HOLD TIMES

Input

1.5 V

3V

1.5 V

0V

Output

Control

3V

1.5 V

1.5 V

0V

tPLH

In-Phase

Output

1.5 V

tPHL

VOH

1.5 V

VOL

tPHL

tPLH

Out-of-Phase

Output

1.5 V

1.5 V

VOH

VOL

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

INVERTING AND NONINVERTING OUTPUTS

tPZL

Output

Waveform 1

(see Note B)

tPZH

1.5 V

tPLZ

≈3.5 V

VOL + 0.3 V VOL

tPHZ

Output

Waveform 2

(see Note B)

1.5 V

VOH – 0.3 V VOH

≈0 V

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

LOW- AND HIGH-LEVEL ENABLING

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

Figure 1. Load Circuit and Voltage Waveforms

6

• POST OFFICE BOX 655303 DALLAS, TEXAS 75265

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