MC74HC4538A
http://onsemi.com
3
MAXIMUM RATINGS
Symbol Parameter Value Unit
V
CC
DC Supply Voltage *0.5 to )7.0 V
V
I
DC Input Voltage *0.5 v V
I
v V
CC
)0.5 V
V
O
DC Output Voltage (Note 1) *0.5 v V
O
v V
CC
)0.5 V
I
IK
DC Input Diode Current A, B, Reset
C
X
, R
X
$20
$30
mA
I
OK
DC Output Diode Current $25 mA
I
O
DC Output Sink Current $25 mA
I
CC
DC Supply Current per Supply Pin $100 mA
I
GND
DC Ground Current per Ground Pin $100 mA
T
STG
Storage Temperature Range *65 to )150
_C
T
L
Lead temperature, 1 mm from Case for 10 Seconds 260
_C
T
J
Junction temperature under Bias )150
_C
q
JA
Thermal resistance PDIP
SOIC
TSSOP
78
112
148
_C/W
P
D
Power Dissipation in Still Air at 85_C PDIP
SOIC
TSSOP
750
500
450
mW
MSL Moisture Sensitivity Level 1
F
R
Flammability Rating Oxygen Index: 30% − 35% UL−94−VO (0.125 in)
V
ESD
ESD Withstand Voltage Human Body Model (Note 2)
Machine Model (Note 3)
Charged Device Model (Note 4)
>2000
>100
>500
V
I
Latchup
Latchup Performance Above V
CC
and Below GND at 85_C (Note 5)
$300 mA
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
1. I
O
absolute maximum rating must be observed.
2. Tested to EIA/JESD22−A114−A.
3. Tested to EIA/JESD22−A115−A.
4. Tested to JESD22−C101−A.
5. Tested to EIA/JESD78.
6. For high frequency or heavy load considerations, see the ON Semiconductor High−Speed CMOS Data Book (DL129/D).
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Max Unit
V
CC
DC Supply Voltage (Referenced to GND) 3.0* 6.0 V
V
in
, V
out
DC Input Voltage, Output Voltage (Referenced to GND) 0 V
CC
V
T
A
Operating Temperature, All Package Types –55 +125
_C
t
r
, t
f
Input Rise and Fall Time V
CC
= 2.0 V
(Figure 7) V
CC
= 4.5 V
V
CC
= 6.0 V
A or B (Figure 5)
0
0
0
−
1000
500
400
No Limit
ns
R
x
External Timing Resistor V
CC
< 4.5 V
V
CC
≥ 4.5 V
1.0
2.0
†
†
kW
C
x
External Timing Capacitor 0 †
mF
*The HC4538A will function at 2.0 V but for optimum pulse−width stability, V
CC
should be above 3.0 V.
†The maximum allowable values of R
x
and C
x
are a function of the leakage of capacitor C
x
, the leakage of the HC4538A, and leakage due to board layout
and surface resistance. For most applications, C
x
/R
x
should be limited to a maximum value of 10 mF/1.0 MW. Values of C
x
>1.0mF may cause a
problem during power down (see Power Down Considerations). Susceptibility to externally induced noise signals may occur for R
x
>1.0MW.
7. Unused inputs may not be left open. All inputs must be tied to a high−logic voltage level or a low−logic input voltage level.
8. Information on typical parametric values can be found in the ON Semiconductor High−Speed CMOS Data Book (DL129/D).
