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SN74ACT2235-40PAG Datasheet(PDF) 9 Page - Texas Instruments

Part # SN74ACT2235-40PAG
Description  1024 횞 9 횞 2 ASYNCHRONOUS BIDIRECTIONAL FIRST-IN, FIRST-OUT MEMORY
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN74ACT2235-40PAG Datasheet(HTML) 9 Page - Texas Instruments

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SN74ACT2235
1024
× 9 × 2
ASYNCHRONOUS BIDIRECTIONAL FIRST-IN, FIRST-OUT MEMORY
SCAS148F – DECEMBER 1990 – REVISED JUNE 2003
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
UNIT
VOH
VCC = 4.5 V,
IOH = –8 mA
2.4
V
VOL
Flags
VCC = 4.5 V,
IOL = 8 mA
0.5
V
VOL
I/O ports
VCC = 4.5 V,
IOL = 16 mA
0.5
V
II
VCC = 5.5 V,
VI = VCC or 0
±5
µA
IOZ
VCC = 5.5 V,
VO = VCC or 0
±5
µA
ICC‡
VI = VCC – 0.2 V or 0
10
400
µA
∆ICC§
VCC = 5.5 V,
One input at 3.4 V,
Other inputs at VCC or GND
1
mA
Ci
VI = 0,
f = 1 MHz
4
pF
Co
VO = 0,
f = 1 MHz
8
pF
† All typical values are at VCC = 5 V, TA = 25°C.
‡ ICC is tested with outputs open.
§ This is the supply current when each input is at one of the specified TTL voltage levels, rather than 0 V or VCC.
timing requirements over recommended operating conditions (unless otherwise noted) (see
Figure 3)
’ACT2235-20
’ACT2235-30
’ACT2235-40
’ACT2235-60
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
f lk
Clock frequency
LDCKA or LDCKB
50
33
25
16.7
MHz
fclock
Clock frequency
UNCKA or UNCKB
50
33
25
16.7
MHz
RSTA or RSTB low
20
20
25
25
LDCKA or LDCKB low
8
10
14
20
t
Pulse duration
LDCKA or LDCKB high
8
10
14
20
ns
tw
Pulse duration
UNCKA or UNCKB low
8
10
14
20
ns
UNCKA or UNCKB high
8
10
14
20
DAF or DBF high
10
10
10
10
Data before LDCKA
or LDCKB
4
4
5
5
Define AF/AE:
D0–D8 before DAF or DBF
5
5
5
5
tsu
Setup time
Define AF/AE: DAF or DBF
before RSTA or RSTB
7
7
7
7
ns
Define AF/AE (default):
DAF or DBF high before
RSTA or RSTB
5
5
5
5
RSTA or RSTB inactive (high)
before LDCKA or LDCKB
5
5
5
5
Data after LDCKA or LDCKB
1
1
2
2
Define AF/AE: D0–D8
after DAF or DBF
0
0
0
0
th
Hold time
Define AF/AE: DAF or DBF low
after RSTA or RSTB
0
0
0
0
ns
Define AF/AE (default):
DAF or DBF high after
RSTA or RSTB
0
0
0
0


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