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SN74ALS870DW Datasheet(PDF) 4 Page - Texas Instruments

Part No. SN74ALS870DW
Description  DUAL 16-BY-4 REGISTER FILES
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN74ALS870
DUAL 16-BY-4 REGISTER FILES
SDAS139A – DECEMBER 1982 – REVISED JANUARY 1995
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
V
VIH
High-level input voltage
2
V
VIL
Low-level input voltage
0.8
V
IOH
High-level output current
– 2.6
mA
IOL
Low-level output current
24
mA
tw
Pulse duration, write
12
ns
Address before write
5
tsu
Setup time
Data before write
15
ns
Select before write
12
Address before write
0
th
Hold time
Data before write
0
ns
Select before write
12
TA
Operating free-air temperature
0
70
°C
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
VOH
VCC = 4.5 V to 5.5 V,
IOH = – 0.4 mA
VCC –2
V
VOH
VCC = 4.5 V,
IOH = – 2.6 mA
2.4
3.2
V
VOL
VCC = 4.5 V,
IOL = 24 mA
0.35
0.5
V
II
Control inputs
VCC =5 5V
VI = 7 V
0.1
mA
II
DQA and DQB ports
VCC = 5.5 V
VI = 5.5 V
0.2
mA
1W and 2W
20
IIH
Other control inputs
VCC = 5.5 V,
VI = 2.7 V
40
µA
DQA and DQB ports‡
50
IIL
Control inputs
VCC =5 5V
VI =0 4V
– 0.2
mA
IIL
DQA and DQB ports‡
VCC = 5.5 V,
VI = 0.4 V
– 0.2
mA
IO§
VCC = 5.5 V,
VO = 2.25 V
–30
–112
mA
ICC
VCC = 5.5 V
80
110
mA
† All typical values are at VCC = 5 V, TA = 25°C.
‡ For I/O ports, the parameters IIH and IIL include the off-state output current.
§ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.




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