SN74ACT7805-25DL datasheet(11/14 Pages) TI

部品番号	SN74ACT7805-25DL

部品情報	256 횞 18 CLOCKED FIRST-IN, FIRST-OUT MEMORY

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11 / 14 page

SN74ACT7805

256

× 18 CLOCKED FIRST-IN, FIRST-OUT MEMORY

SCAS201B – MARCH 1991 – REVISED APRIL 1998

11

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

operating characteristics, VCC = 5 V, TA = 25°C

PARAMETER

TEST CONDITIONS

TYP

UNIT

Cpd

Power dissipation capacitance per FIFO channel

Outputs enabled

CL = 50 pF,

f = 5 MHz

53

pF

PARAMETER MEASUREMENT INFORMATION

VOH

VOL

th

tPLH

tPHL

Output

Control

Output

Waveform 1

S1 at 7 V

Output

Waveform 2

S1 at Open

tPZL

tPZH

tPLZ

tPHZ

1.5 V

3 V

0 V

1.5 V

VOH

VOL

0 V

1.5 V

VOL + 0.3 V

1.5 V

VOH – 0.3 V

≈ 0 V

1.5 V

3 V

0 V

1.5 V

0 V

3 V

0 V

1.5 V

tw

Input

3 V

≈ 3.5 V

VOLTAGE WAVEFORMS

SETUP AND HOLD TIMES

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

VOLTAGE WAVEFORMS

PULSE DURATION

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

Timing

Input

Data

Input

Output

Input

S1

500

Ω

LOAD CIRCUIT

500

Ω

7 V

From Output

Under Test

Test

Point

CL = 50 pF

(see Note A)

tsu

tPZH

tPZL

tPHZ

tPLZ

tPLH

tPHL

Open

Closed

Open

Closed

Open

PARAMETER

S1

ten

tdis

tpd

NOTE A: CL includes probe and jig capacitance.

Figure 5. Load Circuit and Voltage Waveforms

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