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SN74ABT7820PN датащи(PDF) 11 Page - Texas Instruments

номер детали SN74ABT7820PN
подробное описание детали  512 횞 18 횞 2 STROBED BIDIRECTIONAL FIRST-IN, FIRST-OUT MEMORY
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SN74ABT7820PN датащи(HTML) 11 Page - Texas Instruments

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SN74ABT7820
512
× 18 × 2
STROBED BIDIRECTIONAL FIRST-IN, FIRST-OUT MEMORY
SCAS206D – AUGUST 1991 – REVISED APRIL 1998
11
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
VIK
VCC = 4.5 V,
II = – 18 mA
–1.2
V
VCC = 4.5 V,
IOH = – 3 mA
2.5
VOH
VCC = 5 V,
IOH = – 3 mA
3
V
VCC = 4.5 V,
IOH = – 12 mA
2
VOL
VCC = 4.5 V,
IOL = 24 mA
0.55
V
II
VCC = 5.5 V,
VI = VCC or GND
±5
µA
IOZH‡
VCC = 5.5 V,
VO = 2.7 V
50
µA
IOZL‡
VCC = 5.5 V,
VO = 0.5 V
–50
µA
IO§
VCC = 5.5 V,
VO = 2.5 V
–40
–100
–180
mA
Outputs high
15
ICC
VCC = 5.5 V,
IO = 0,
VI = VCC or GND Outputs low
95
mA
Outputs disabled
15
Ci
Control inputs
VI = 2.5 V or 0.5 V
6
pF
Co
Flags
VO = 2.5 V or 0.5 V
4
pF
Cio
A or B ports
VO = 2.5 V or 0.5 V
8
pF
† All typical values are at VCC = 5 V, TA = 25°C.
‡ The parameters IOZH and IOZL include the input leakage current.
§ Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (see Figures 2 through 4)
’ABT7820-15
’ABT7820-20
’ABT7820-25
’ABT7820-30
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
fclock
Clock frequency
67
50
40
33
MHz
LDCKA, LDCKB high
4
6
9
11
Pl
LDCKA, LDCKB low
4
6
9
11
tw
Pulse
duration
UNCKA, UNCKB high
4
6
9
11
ns
duration
UNCKA, UNCKB low
4
6
9
11
RSTA, RSTB low
6
8
10
12
A0 – A17 before LDCKA
↑ and
B0 – B17 before LDCKB
3
4
4
4
tsu
Setup time
PENA before LDCKA
↑ and
PENB before LDCKB
5
5
5
5
ns
LDCKA inactive before RSTA high
and LDCKB inactive before RSTB high
3
3
4
4
A0 – A17 after LDCKA
↑ and
B0 – B17 after LDCKB
0
0
0
0
th
Hold time
PENA after LDCKA low and
PENB after LDCKB low
2
2
2
2
ns
LDCKA inactive after RSTA high and
LDCKB inactive after RSTB high
3
3
4
4


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