SN74LS395N 查看數據表（PDF） - Motorola => Freescale

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SN74LS395N

4-bit shift register with 3-state outputs

Motorola => Freescale 

SN74LS395

AC WAVEFORMS

The shaded areas indicate when the input is permitted to change for predictable output performance.

D

*

1.3 V

ts(L)

CP OR

MR

1.3 V

Q

1.3 V

th(L)

ts(H)

tPHL

tW

1/fmax

1.3 V

th(H)

1.3 V

tPLH

LOAD SERIAL DATA

SHIFT RIGHT

S

1.3 V

LOAD PARALLEL DATA

1.3 V

ts(L)

CP

th(L)

ts(H)

th(H)

1.3 V

*The Data Input is DS for S = LOW and Pn for S = HIGH.

Figure 1

Figure 2

VE

1.3 V

VOUT

tPZL

1.3 V

1.3 V

tPLZ

≈ 1.3 V

0.5 V

VOL

Figure 3

VE

1.3 V

tPZH

tPHZ

VOUT

1.3 V

1.3V

≥ VOH

≈ 1.3 V

0.5 V

Figure 4

AC LOAD CIRCUIT

TO OUTPUT

UNDER TEST

VCC

RL

SW1

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

5-554

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