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SN54ALS74A Datasheet(PDF) 5 Page - Texas Instruments

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Part No. SN54ALS74A
Description  DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH CLEAR AND PRESET
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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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
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS74A
SN74AS74A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
MIN
TYP†
MAX
UNIT
VIK
VCC = 4.5 V,
II = –18 mA
–1.2
–1.2
V
VOH
VCC = 4.5 V to 5.5 V,
IOH = – 2 mA
VCC –2
VCC –2
V
VOL
VCC = 4.5 V,
IOL = 20 mA
0.25
0.5
0.25
0.5
V
II
VCC = 5.5 V,
VI = 7 V
0.1
0.1
mA
IIH
CLK or D
VCC =5 5V
VI =2 7V
20
20
µA
IIH
PRE or CLR
VCC = 5.5 V,
VI = 2.7 V
40
40
µA
IIL
CLK or D
VCC =5 5V
VI =0 4V
– 0.5
– 0.5
mA
IIL
PRE or CLR
VCC = 5.5 V,
VI = 0.4 V
–1.8
–1.8
mA
IO‡
VCC = 5.5 V,
VO = 2.25 V
–30
–112
–30
–112
mA
ICC
VCC = 5.5 V,
See Note 1
10.5
16
10.5
16
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.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500 Ω,
TA = MIN to MAX§
UNIT
(INPUT)
(OUTPUT)
SN54AS74A
SN74AS74A
MIN
MAX
MIN
MAX
fmax*
90
105
MHz
tPLH
PRE or CLR
QorQ
2
9
2
7.5
ns
tPHL
PRE or CLR
Q or Q
2.5
11.5
2.5
10.5
ns
tPLH
CLK
QorQ
2.5
10
3
8
ns
tPHL
CLK
Q or Q
3.5
10.5
3
9
ns
* On products compliant to MIL-STD-833, Class B, this parameter is based on characterization data but is not production tested.
§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.




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