SN74ACT7203L, SN74ACT7204L, SN74ACT7205L, SN74ACT7206L

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

ASYNCHRONOUS FIRST IN, FIRST OUT MEMORIES

SCAS226A − FEBRUARY 1993 − REVISED SEPTEMBER 1995

15

POST OFFICE BOX 655303

POST OFFICE BOX 1443

PARAMETER MEASUREMENT INFORMATION

W

R

XO/HF

tpd(W-XOL)

tpd(W-XOH)

Write to Last

Physical Location

Read From Last

Physical Location

tpd(R-XOL)

tpd(R-XOH)

Figure 9. Expansion-Out Waveforms

W

R

XI

Write to First

Physical Location

Read From First

Physical Location

tw(XIL)

tw(XIH)

tsu(XI-W)

tsu(XI-R)

Figure 10. Expansion-In Waveforms

th(E-R)

W

EF

tpd(W-E)

R

Figure 11. Minimum Timing for an Empty-Flag Coincident-Read Pulse