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SN74ALS874BNSR Datasheet(PDF) 4 Page - Texas Instruments

Part No. SN74ALS874BNSR
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
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
SN54ALS874B
SN74ALS874B
SN74ALS876A
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
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
0.7
0.8
V
IOH
High-level output current
–1
– 2.6
mA
IOL
Low-level output current
12
24
mA
fclock
Clock frequency
0
25
0
30
MHz
PRE or CLR low
15
10
tw
Pulse duration
CLK high
20
16.5
ns
CLK low
20
16.5
t
Set p time before CLK
Data
15
15
ns
tsu
Setup time before CLK
PRE or CLR inactive
15
10
ns
th
Hold time, data after CLK
4
0
ns
TA
Operating free-air temperature
–55
125
0
70
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS874B
SN74ALS874B
SN74ALS876A
UNIT
MIN
TYP†
MAX
MIN
TYP†
MAX
VIK
VCC = 4.5 V,
II = – 18 mA
– 1.2
– 1.2
V
VCC = 4.5 V to 5.5 V,
IOH = – 0.4 mA
VCC –2
VCC –2
VOH
VCC =4 5V
IOH = – 1 mA
2.4
3.3
V
VCC = 4.5 V
IOH = – 2.6 mA
2.4
3.2
VOL
VCC =4 5V
IOL = 12 mA
0.25
0.4
0.25
0.4
V
VOL
VCC = 4.5 V
IOL = 24 mA
0.35
0.5
V
IOZH
VCC = 5.5 V,
VO = 2.7 V
20
20
µA
IOZL
VCC = 5.5 V,
VO = 0.4 V
–20
–20
µA
II
VCC = 5.5 V,
VI = 7 V
0.1
0.1
mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20
20
µA
IIL
VCC = 5.5 V,
VI = 0.4 V
– 0.2
– 0.2
mA
IO‡
VCC = 5.5 V,
VO = 2.25 V
–20
–112
–30
–112
mA
Outputs high
14
21
14
21
′ALS874B
VCC = 5.5 V
Outputs low
19
30
19
30
ICC
Outputs disabled
20
32
20
32
mA
ICC
Outputs high
14
21
mA
SN74ALS876A
VCC = 5.5 V
Outputs low
18
29
Outputs disabled
20
31
† 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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