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SN54ALS74A Datasheet(PDF) 3 Page - Texas Instruments

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No. de Pieza. SN54ALS74A
Descripción  DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH CLEAR AND PRESET
Descarga  7 Pages
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Fabricante  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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SN54ALS74A Datasheet(HTML) 3 Page - Texas Instruments

   
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SN54ALS74A, SN54AS74A, SN74ALS74A, SN74AS74A
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH CLEAR AND PRESET
SDAS143C – APRIL 1982 – REVISED AUGUST 1995
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
SN54ALS74A
SN74ALS74A
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
0.7
0.8
V
IOH
High-level output current
– 0.4
– 0.4
mA
IOL
Low-level output current
4
8
mA
fclock
Clock frequency
0
25
0
34
MHz
PRE or CLR low
15
15
tw
Pulse duration
CLK high
17.5
14.5
ns
CLK low
17.5
14.5
t
Set p time before CLK
Data
16
15
ns
tsu
Setup time before CLK
PRE or CLR inactive
10
10
ns
th
Hold time after CLK
Data
2
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
SN54ALS74A
SN74ALS74A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
MIN
TYP†
MAX
UNIT
VIK
VCC = 4.5 V,
II = –18 mA
–1.5
–1.5
V
VOH
VCC = 4.5 V to 5.5 V,
IOH = – 2 mA
VCC –2
VCC –2
V
VOL
VCC =4 5V
IOL = 4 mA
0.25
0.4
0.25
0.4
V
VOL
VCC = 4.5 V
IOL = 8 mA
0.35
0.5
V
II
CLK or D
VCC =4 5V
VI =7V
0.1
0.1
mA
II
PRE or CLR
VCC = 4.5 V,
VI = 7 V
0.2
0.2
mA
IIH
CLK or D
VCC =4 5V
VI =2 7V
20
20
µA
IIH
PRE or CLR
VCC = 4.5 V,
VI = 2.7 V
40
40
µA
IIL
CLK or D
VCC =4 5V
VI =0 4V
– 0.2
– 0.2
mA
IIL
PRE or CLR
VCC = 4.5 V,
VI = 0.4 V
– 0.4
– 0.4
mA
IO‡
VCC = 5.5 V,
VO = 2.25 V
–20
–112
–30
–112
mA
ICC
VCC = 5.5 V,
See Note 1
2.4
4
2.4
4
mA
† 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.
NOTE 1: ICC is measured with D, CLK, and PRE grounded, then with D, CLK, and CLR grounded.


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