Datasheet
CD74HCT4543
BCD-TO-7 SEGMENT LATCH/DECODER/DRIVER
SCHS281A – REVISED MAY 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
†
Supply voltage range, V
CC
–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input diode current, I
IK
(V
I
< –0.5 V or V
I
> V
CC
+ 0.5 V) ) (see Note 1) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . .
Output diode current, I
OK
(V
O
< –0.5 V or V
O
> V
CC
+ 0.5V) (see Note 1) ±20 mA. . . . . . . . . . . . . . . . . . . . . .
Continuous output source or sink current per output, I
O
(V
O
= 0 to V
CC
) ±25 mA. . . . . . . . . . . . . . . . . . . . . . .
Continuous current through V
CC
or GND ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
JA
(see Note 2) 67°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
At distance 1/16 ± 1/32 in. (1.59 ± 0.79 mm) from case for 10 s maximum 265°C. . . . . . . . . . . . . . . . . . . . .
Unit inserted into a PC board (min. thickness 1/16 in., 1.59 mm)
with solder contacting lead tips only 300°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature, T
stg
–65 to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 3)
T
A
= 25°C
T
A
= –55°C
TO 125°C
T
A
= –40°C
TO 85°C
UNIT
MIN MAX MIN MAX MIN MAX
V
CC
Supply voltage 4.5 5.5 4.5 5.5 4.5 5.5 V
V
IH
High-level input voltage 2 2 2 V
V
IL
Low-level input voltage 0.8 0.8 0.8 V
V
I
Input voltage V
CC
V
CC
V
CC
V
V
O
Output voltage V
CC
V
CC
V
CC
V
t
t
Input transition (rise and fall) time 500 500 500 ns
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
T
A
= –55°C
TO 125°C
T
A
= –40°C
TO 85°C
UNIT
CC
MIN TYP MAX MIN MAX MIN MAX
V
OH
V
I
=V
IH
or V
IL
I
OH
= –20 µA
45V
4.4 4.4 4.4
V
V
OH
V
I
=
V
IH
or
V
IL
I
OH
= –4 mA
4
.
5
V
3.98 3.7 3.84
V
V
OL
V
I
=V
IH
or V
IL
I
OL
= 20 µA
45V
0.1 0.1 0.1
V
V
OL
V
I
=
V
IH
or
V
IL
I
OL
= 4 mA
4
.
5
V
0.26 0.4 0.33
V
I
I
V
I
= V
CC
to GND 5.5 V ±0.1 ±1 ±1 µA
I
CC
V
I
= V
CC
or 0, I
O
= 0 5.5 V 8 160 80 µA
∆I
CC
‡
One input at V
CC
– 2.1 V,
Other inputs at 0 or V
CC
4.5 V to 5.5 V 100 360 490 450 µA
C
i
10 10 10 pF
‡
Additional quiescent supply current per input pin, TTL inputs high, 1 unit load. For dual-supply systems, theoretical worst-case
(V
I
= 2.4 V, V
CC
= 5.5 V) specification is 1.8 mA.