SN74LS251 데이터 시트보기 (PDF) - Motorola => Freescale

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SN74LS251

8-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS

Motorola => Freescale 

SN54/74LS251

3-STATE AC WAVEFORMS

VIN

1.3 V

tPLH

VOUT

1.3 V

1.3 V

tPHL

1.3 V

Figure 1

VIN

1.3 V

tPHL

VOUT

1.3 V

1.3 V

tPLH

1.3 V

Figure 2

VE

tPZL

VOUT

1.3 V

1.3 V

Figure 3

1.3 V

0.5 V

tPLZ

≈ 1.3 V

VOL

0.5 V

VE

tPZH

VOUT

1.3 V

tPHZ

1.3 V

1.3 V

≥ VOH

≈ 1.3 V

0.5 V

Figure 4

TO OUTPUT

UNDER TEST

VCC

RL

SW1

AC LOAD CIRCUIT

5 kΩ

CL*

SW2

SWITCH POSITIONS

SYMBOL

SW1

SW2

tPZH

tPZL

tPLZ

tPHZ

Open

Closed

Closed

Closed

Closed

Open

Closed

Closed

* Includes Jig and Probe Capacitance.

Figure 5

FAST AND LS TTL DATA

5-413

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