SN74ACT7203L, SN74ACT7204L, SN74ACT7205L, SN74ACT7206L

2048 × 9, 4096 × 9, 8192 × 9, 16384 × 9

ASYNCHRONOUS FIRST IN, FIRST OUT MEMORIES

SCAS226A − FEBRUARY 1993 − REVISED SEPTEMBER 1995

10

POST OFFICE BOX 655303

POST OFFICE BOX 1443

switching characteristics over recommended ranges of supply voltage and operating free-air

temperature (see Figure 13)

PARAMETER

FIGURE

′ACT7203L-15

′ACT7204L-15

′ACT7205L-15

′ACT7206L-15

′ACT7203L-25

′ACT7204L-25

′ACT7205L-25

′ACT7206L-25

′ACT7203L-50

′ACT7204L-50

′ACT7205L-50

′ACT7206L-50

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

ta

Access time, R

↓ or EF↑ to data out valid

1(a), 3, 5

15

25

50

ns

tv(RH)

Valid time, data out valid after R

↑

1(a)

5

5

5

ns

ten(R-QX)

Enable time, R

↓ to Q outputs at

low impedance†

1(a)

5

5

10

ns

ten(W-QX)

Enable time, W

↑ to Q outputs at

low impedance†‡

5

5

5

15

ns

tdis(R)

Disable time, R

↑ to Q outputs at

high impedance†

1(a)

15

18

30

ns

tw(FH)

Pulse duration, FF high in

automatic-write mode

6

15

25

45

ns

tw(EH)

Pulse duration, EF high in

automatic-read mode

5

15

25

45

ns

tpd(W-F)

Propagation delay time, W

↓ to FF low

2

15

25

45

ns

tpd(R-F)

Propagation delay time, R

↑ to FF high

2, 6, 12

15

25

45

ns

tpd(RS-F)

Propagation delay time, RS

↓ to FF high

7

25

35

65

ns

tpd(RS-HF)

Propagation delay time, RS

↓ to XO/HF

high

7

25

35

65

ns

tpd(W-E)

Propagation delay time, W

↑ to EF high

3, 5, 11

15

25

45

ns

tpd(R-E)

Propagation delay time, R

↓ to EF low

3

15

25

45

ns

tpd(RS-E)

Propagation delay time, RS

↓ to EF low

7

25

35

65

ns

tpd(W-HF)

Propagation delay time, W

↓ to XO/HF

low

8

25

35

65

ns

tpd(R-HF)

Propagation delay time, R

↑ to XO/HF

high

8

25

35

65

ns

tpd(R-XOL)

Propagation delay time, R

↓ to XO/HF

low

9

15

25

50

ns

tpd(W-XOL)

Propagation delay time, W

↓ to XO/HF

low

9

15

25

50

ns

tpd(R-XOH)

Propagation delay time, R

↑ to XO/HF

high

9

15

25

50

ns

tpd(W-XOH)

Propagation delay time, W

↑ to XO/HF

high

9

15

25

50

ns

tpd(RT-FL)

Propagation delay time,

FL/RT

↓ to HF, EF, FF valid

4

25

35

65

ns

† These values are characterized but not currently tested.

‡ Only applies when data is automatically read