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SN74ALS874BDWR Datasheet(PDF) 6 Page - Texas Instruments

Part No. SN74ALS874BDWR
Description  DUAL 4-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN54ALS874B, SN74ALS874B, SN74ALS876A
SN74AS874, SN74AS876
DUAL 4-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS
SDAS061C – APRIL 1982 – REVISED JANUARY 1995
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
SN74AS874
SN74AS876
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
VIH
High-level input voltage
2
2
V
VIL
Low-level input voltage
0.8
0.8
V
IOH
High-level output current
–15
–15
mA
IOL
Low-level output current
48
48
mA
fclock
Clock frequency
0
125
0
80
MHz
PRE or CLR low
2
4.5
tw
Pulse duration
CLK high
3
6.2
ns
CLK low
4
6.2
t
Set p time before CLK
Data
2
4.5
ns
tsu
Setup time before CLK
PRE or CLR inactive
4
5
ns
th
Hold time, data after CLK
1
2
ns
TA
Operating free-air temperature
0
70
0
70
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN74AS874
SN74AS876
UNIT
MIN
TYP†
MAX
VIK
VCC = 4.5 V,
II = – 18 mA
– 1.2
V
VOH
VCC = 4.5 V to 5.5 V,
IOH = – 2 mA
VCC –2
V
VOH
VCC = 4.5 V,
IOH = – 15 mA
2.4
3.3
V
VOL
VCC = 4.5 V,
IOL = 48 mA
0.35
0.5
V
IOZH
VCC = 5.5 V,
VO = 2.7 V
50
µA
IOZL
VCC = 5.5 V,
VO = 0.4 V
–50
µA
II
VCC = 5.5 V,
VI = 7 V
0.1
mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20
µA
IIL
D
VCC =5 5V
VI =0 4V
–2
mA
IIL
All others
VCC = 5.5 V,
VI = 0.4 V
– 0.5
mA
IO‡
VCC = 5.5 V,
VO = 2.25 V
–30
–112
mA
Outputs high
82
133
SN74AS874
VCC = 5.5 V
Outputs low
92
149
ICC
Outputs disabled
100
160
mA
ICC
Outputs high
88
142
mA
SN74AS876
VCC = 5.5 V
Outputs low
94
150
Outputs disabled
100
160
† All typical values are at VCC = 5 V, TA = 25°C.
‡ 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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