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
I
≤ V
CC
+ 0.5 V
V
O
DC Output Voltage (Note 1) −0.5 ≤ V
O
≤ 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 SOIC
TSSOP
112
148
_C/W
P
D
Power Dissipation in Still Air at 85_C SOIC
TSSOP
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
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, 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.
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Max Unit
V
CC
DC Supply Voltage (Referenced to GND) 2.0 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 6) V
CC
= 4.5 V
V
CC
= 6.0 V
A or B (Figure 4)
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
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
†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.
6. 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.
