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SN74ALS994NT Datasheet(PDF) 2 Page - Texas Instruments

Part No. SN74ALS994NT
Description  10-BIT D-TYPE TRANSPARENT READ-BACK LATCH
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN74ALS994
10-BIT D-TYPE TRANSPARENT READ-BACK LATCH
SDAS237A – OCTOBER 1984 – REVISED JANUARY 1995
2–2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic diagram (positive logic)
1D
C1
To Nine Other Channels
1
13
223
OERB
LE
1D
1Q
timing diagram
Data Bus
LE
OERB
Q
tsu
th
tpd
tdis
Input Data
Read Back
Input Data
tpd
tsu†
† This setup time ensures that the read-back circuit will not create a conflict on the input data bus.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI (OERB and LE)
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage applied to D inputs
5.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA
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.




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