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SN74ACT7801 Datasheet(PDF) 11 Page - Texas Instruments

No. de pieza SN74ACT7801
Descripción Electrónicos  1024x18 CLOCKED FIRST-IN, FIRST-OUT MEMORY
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

SN74ACT7801 Datasheet(HTML) 11 Page - Texas Instruments

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SN74ACT7801
1024 × 18 CLOCKED FIRST IN, FIRST OUT MEMORY
SCAS111 − D3489, APRIL 1990 − REVISED MAY 1991
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
11
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC
−0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage applied to a disabled 3-state output
5.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range
0
°C to 70°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range
−65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
′ACT7801-15
′ACT7801-18
′ACT7801-20
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
VCC
Supply voltage
4.5
5.5
4.5
5.5
4.5
5.5
V
VIH
High-level input voltage
2
2
2
V
VIL
Low-level input voltage
0.8
0.8
0.8
V
IOH
High-level output current
−8
−8
−8
mA
IOL
Low-level output current
16
16
16
mA
fclock
Clock frequency
40
35
28.5
MHz
Data in (D0 − D17) high or low
10
12
14
WRTCLK high
7
8.5
10
WRTCLK low
15
15
15
tw
Pulse duration
RDCLK high
7
8.5
10
ns
tw
Pulse duration
RDCLK low
15
15
15
ns
DAF high
10
10
10
WRTEN1, WRTEN2 high or low
10
10
10
OE, RDEN1, RDEN2 high or low
10
10
10
Data in (D0 − D17) before WRTCLK
5
5
5
WRTEN1, WRTEN2 before WRTCLK
5
5
5
OE, RDEN1, RDEN2 before RDCLK
5
5
5
tsu
Setup time
Reset: RESET low before first WRTCLK and
RDCLK
7
7
7
ns
Define AF/AE: D0 − D8 before DAF
5
5
5
Define AF/AE: DAF
↓ before RESET↑
7
7
7
Define AF/AE (default): DAF high before RESET
5
5
5
Data in (D0 − D17) after WRTCLK
1
1
1
WRTEN1, WRTEN2 after WRTCLK
1
1
1
OE, RDEN1, RDEN2 after RDCLK
1
1
1
th
Hold time
Reset: RESET low after fourth WRTCLK and
RDCLK
0
0
0
ns
Define AF/AE: D0 − D8 after DAF
1
1
1
Define AF/AE: DAF low after RESET
0
0
0
Define AF/AE (default): DAF high after RESET
1
1
1
TA
Operating free-air temperature
0
70
0
70
0
70
°C


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