SN74ALS233B_16 Datasheet, PDF (6/18 Pages) Texas Instruments – ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY

SN74ALS233B
16 × 5 ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY
SCAS253B – MARCH 1990 – REVISED APRIL 1998
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (see Figure 1)
fclock Clock frequency
tw
Pulse duration
tsu
Setup time
th
Hold time
LDCK
UNCK
RST low
LDCK low
LDCK high
UNCK low
UNCK high
Data before LDCK↑
RST (inactive) before LDCK↑
LDCK (inactive) before RST↑
Data after LDCK↑
MIN NOM MAX UNIT
40
MHz
40
18
15
10
ns
15
10
8
5
ns
5
5
ns
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 1)
PARAMETER
fmax
tpd
tPLH
tPHL
tpd
tPLH
tpd
tPLH
tPHL
tPLH
ten
tdis
FROM
(INPUT)
LDCK, UNCK
LDCK↑
UNCK↑
LDCK↑
UNCK↑
RST↓
LDCK↑
UNCK↑
RST↓
LDCK↑
UNCK↑
RST↓
LDCK↑
UNCK↑
RST↓
OE↑
OE↓
TO
(OUTPUT)
Any Q
EMPTY
EMPTY
EMPTY+1
EMPTY+1
FULL–1
FULL–1
FULL
FULL
Q
Q
MIN MAX UNIT
40
MHz
6
32
ns
6
30
5
25 ns
6
27
ns
5
25
7
34
ns
7
34
8
31 ns
9
33
ns
8
32
11
32 ns
6
27 ns
5
25
ns
9
30
2
15 ns
1
15 ns
6
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