SN54ALS74A, SN54AS74A, SN74ALS74A, SN74AS74A
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH CLEAR AND PRESET
SDAS143C – APRIL 1982 – REVISED AUGUST 1995
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOH
VOL
II
IIH
IIL
CLK or D
PRE or CLR
CLK or D
PRE or CLR
TEST CONDITIONS
VCC = 4.5 V,
VCC = 4.5 V to 5.5 V,
VCC = 4.5 V,
VCC = 5.5 V,
VCC = 5 5 V
5.5 V,
VCC = 5 5 V
5.5 V,
II = –18 mA
IOH = – 2 mA
IOL = 20 mA
VI = 7 V
VI = 2 7 V
2.7
VI = 0 4 V
0.4
SN54AS74A
MIN TYP†
MAX
–1.2
VCC – 2
0.25
0.5
0.1
20
40
– 0.5
–1.8
VCC – 2
0.25
0.5
0.1
20
40
– 0.5
–1.8
SN74AS74A
MIN TYP†
MAX
–1.2
UNIT
V
V
V
mA
µA
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)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500
Ω
,
TA = MIN to MAX§
SN54AS74A
MIN
fmax*
tPLH
tPHL
tPLH
90
2
PRE or CLR
CLK
Q or Q
Q or Q
2.5
2.5
9
11.5
10
MAX
SN74AS74A
MIN
105
2
2.5
3
7.5
10.5
8
MAX
MHz
ns
ns
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
UNIT
tPHL
3.5
10.5
3
9
* 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.
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
5
TI [ TEXAS INSTRUMENTS ]
