SN74ALVC7805 Datasheet, PDF (7/14 Pages) Texas Instruments – 256 × 18 LOW-POWER CLOCKED FIRST-IN, FIRST-OUT MEMORY

RESET
PEN
WRTCLK
SN74ALVC7805
256 × 18
LOW-POWER CLOCKED FIRST-IN, FIRST-OUT MEMORY
SCAS593A – OCTOBER 1997 – REVISED APRIL 1998
1
0
1
0
1
2
WRTEN1
WRTEN2
1
D0–D17 ^{ÎÎW5ÎÎ13 ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ0}
RDCLK
1
OE1
0
RDEN
OE2
Q0–Q17 ^{ÉÉÉÉ}W^ÉÉ1 ^{ÉÉÉÉÉÉ}W2^{ÉÉÉÉÉÉ}W3^{ÉÉÉÉ}W(Y^ÉÉ+1) ^ÉÉW(Y^ÉÉ+2)^ÉÉA^{ÉÉÉÉ}B^{ÉÉÉÉÉÉ}C ^{ÉÉÉÉ}D ^{ÉÉÉÉ}E ^{ÉÉÉÉÉÉ}F ^{ÉÉÉÉ}
OR
AF/AE
HF
IR
DATA-WORD NUMBERS FOR FLAG TRANSITIONS
DEVICE
TRANSITION WORD
A
B
C
D
E
SN74ALVC7805 W129 W130 W(256 – X) W(257 – X) W256
F
W257
Figure 3. FIFO Read
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