Datasheet
CD54AC74, CD74AC74
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH CLEAR AND PRESET
SCHS231D – SEPTEMBER 1998 – REVISED DECEMBER 2002
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions (see Note 3)
T
A
= 25°C
–55°C to
125°C
–40°C to
85°C
UNIT
MIN MAX MIN MAX MIN MAX
V
CC
Supply voltage 1.5 5.5 1.5 5.5 1.5 5.5 V
V
CC
= 1.5 V 1.2 1.2 1.2
V
IH
High-level input voltage
V
CC
= 3 V
2.1 2.1 2.1
V
V
CC
= 5.5 V 3.85 3.85 3.85
V
CC
= 1.5 V 0.3 0.3 0.3
V
IL
Low-level input voltage
V
CC
= 3 V
0.9 0.9 0.9
V
V
CC
= 5.5 V 1.65 1.65 1.65
V
I
Input voltage 0 V
CC
0 V
CC
0 V
CC
V
V
O
Output voltage 0 V
CC
0 V
CC
0 V
CC
V
I
OH
High-level output current V
CC
= 4.5 V to 5.5 V –24 –24 –24 mA
I
OL
Low-level output current V
CC
= 4.5 V to 5.5 V 24 24 24 mA
∆t/∆v
In
p
ut transition rise or fall rate
V
CC
= 1.5 V to 3 V 50 50 50
ns/V
∆t/∆v
Input
transition
rise
or
fall
rate
V
CC
= 3.6 V to 5.5 V 20 20 20
ns/V
NOTE 3: All unused inputs of the device must be held at V
CC
or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS V
CC
T
A
= 25°C
–55°C to
125°C
–40°C to
85°C
UNIT
CC
MIN MAX MIN MAX MIN MAX
1.5 V 1.4 1.4 1.4
I
OH
= –50 µA
3 V 2.9 2.9 2.9
4.5 V 4.4 4.4 4.4
V
OH
V
I
= V
IH
or V
IL
I
OH
= –4 mA 3 V 2.58 2.4 2.48
V
I
OH
= –24 mA 4.5 V 3.94 3.7 3.8
I
OH
= –50 mA
†
5.5 V 3.85
I
OH
= –75 mA
†
5.5 V 3.85
1.5 V 0.1 0.1 0.1
I
OL
= 50 µA
3 V 0.1 0.1 0.1
4.5 V 0.1 0.1 0.1
V
OL
V
I
= V
IH
or V
IL
I
OL
= 12 mA 3 V 0.36 0.5 0.44
V
I
OL
= 24 mA 4.5 V 0.36 0.5 0.44
I
OL
= 50 mA
†
5.5 V 1.65
I
OL
= 75 mA
†
5.5 V 1.65
I
I
V
I
= V
CC
or GND 5.5 V ±0.1 ±1 ±1 µA
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.5 V 4 80 40 µA
C
i
10 10 10 pF
†
Test one output at a time, not exceeding 1-second duration. Measurement is made by forcing indicated current and measuring voltage to minimize
power dissipation. Test verifies a minimum 50-Ω transmission-line drive capability at 85°C and 75-Ω transmission-line drive capability at 125°C.