Datasheet

SN74V263, SN74V273, SN74V283, SN74V293
8192 × 18, 16384 × 18, 32768 × 18, 65536 × 18
3.3-V CMOS FIRST-IN, FIRST-OUT MEMORIES
SCAS669D – JUNE 2001 – REVISED FEBRUARY 2003
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (see Figure 2 through Figure 22)
†
SN74V263-6
SN74V273-6
SN74V283-6
SN74V293-6
SN74V263-7.5
SN74V273-7.5
SN74V283-7.5
SN74V293-7.5
SN74V263-10
SN74V273-10
SN74V283-10
SN74V293-10
SN74V263-15
SN74V273-15
SN74V283-15
SN74V293-15
UNIT
MIN MAX MIN MAX MIN MAX MIN MAX
f
clock
Clock cycle frequency 166 133 100 66.7 MHz
t
A
Data access time 2 4.5 2 5 2 6.5 2 10 ns
t
CLK
Clock cycle time 6 7.5 10 15 ns
t
CLKH
Clock high time 2.5 3.5 4.5 6 ns
t
CLKL
Clock low time 2.5 3.5 4.5 6 ns
t
DS
Data setup time 1.5 2.5 3.5 4 ns
t
DH
Data hold time 0.5 0.5 0.5 1 ns
t
ENS
Enable setup time 1.5 2.5 3.5 4 ns
t
ENH
Enable hold time 0.5 0.5 0.5 1 ns
t
LDS
Load setup time 2 3.5 3.5 4 ns
t
LDH
Load hold time 0 0.5 0.5 1 ns
t
RS
Reset pulse duration
‡
10 10 10 15 ns
t
RSS
Reset setup time 15 15 15 15 ns
t
RSR
Reset recovery time 10 10 10 15 ns
t
RSF
Reset to flag and output time 15 15 15 15 ns
t
RTS
Retransmit setup time 2 3.5 3.5 4 ns
t
OLZ
Output enable to output in low impedance 0 0 0 0 ns
t
OE
Output enable to output valid 2 4.5 2 6 2 6 2 8 ns
t
OHZ
Output enable to output in high impedance 2 4.5 2 6 2 6 2 8 ns
t
WFF
Write clock to FF or IR 4.5 5 6.5 10 ns
t
REF
Read clock to EF or OR 4.5 5 6.5 10 ns
t
PAFA
Clock to asynchronous programmable
almost-full flag
8.5 12.5 16 20 ns
t
PAFS
Write clock to synchronous programmable
almost-full flag
4.5 5 6.5 10 ns
t
PAEA
Clock to asynchronous programmable
almost-empty flag
8.5 12.5 16 20 ns
t
PAES
Read clock to synchronous programmable
almost-empty flag
4.5 5 6.5 10 ns
t
HF
Clock to half-full flag 7 12.5 16 20 ns
t
sk1
Skew time between read clock and write clock
for EF
/OR and FF/IR
4 5 7 9 ns
t
sk2
Skew time between read clock and write clock
for PAE
and PAF
4 7 10 14 ns
†
All ac timings apply to both FWFT mode and standard modes.
‡
Pulse durations less than minimum values are not allowed.