74VHC393 Dual 4-Bit Binary Counter
March 1993
Revised February 2005
74VHC393
Dual 4-Bit Binary Counter
General Description
The VHC393 is an advanced high speed CMOS 4-bit
Binary Counter fabricated with silicon gate CMOS technol-
ogy. It achieves the high speed operation similar to equiva-
lent Bipolar Schottky TTL while maintaining the CMOS low
power dissipation. It contains two independent counter cir-
cuits in one package, so that counting or frequency division
of 8 binary bits can be achieved with one IC. This device
changes state on the negative going transition of the
CLOCK pulse. The counter can be reset to “0” (Q
0
–Q
3
“L”) by a HIGH at the CLEAR input regardless of other
inputs.
An input protection circuit ensures that 0V to 7V can be
applied to the input pins without regard to the supply volt-
age. This device can be used to interface 5V to 3V systems
and two supply systems such as battery back up. This cir-
cuit prevents device destruction due to mismatched supply
and input voltages.
Features
s
High Speed: f
MAX
170 MHz (typ) at T
A
V
NIL
25
q
C
25
q
C
s
Low power dissipation: I
CC
s
High noise immunity: V
NIH
4
P
A (max) at T
A
28% V
CC
(min)
s
Power down protection is provided on all inputs
s
Pin and function compatible with 74HC393
Ordering Code:
Order Number
74VHC393M
74VHC393SJ
74VHC393MTC
74VHC393MTCX_NL
(Note 1)
74VHC393N
Package
Number
M14A
M14D
MTC14
MTC14
N14A
Package Description
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
Pb-Free 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pb-Free 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Pb-Free package per JEDEC J-STD-020B.
Note 1:
“_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only.
Logic Symbol
IEEE/IEC
Connection Diagram
Pin Descriptions
Pin Names
CLR1, CLR2
CP
1
, CP
2
QA, QB, QC, QD
Description
Clear Inputs
Clock Pulse Inputs
Outputs
© 2005 Fairchild Semiconductor Corporation
DS011571
www.fairchildsemi.com
74VHC393
Absolute Maximum Ratings
(Note 2)
Supply Voltage (V
CC
)
DC Input Voltage (V
IN
)
DC Output Voltage (V
OUT
)
Input Diode Current (I
IK
)
Output Diode Current (I
OK
)
DC Output Current (I
OUT
)
DC V
CC
/GND Current (I
CC
)
Storage Temperature (T
STG
)
Lead Temperature (T
L
)
(Soldering, 10 seconds)
260
q
C
0.5V to
7.0V
0.5V to
7.0V
0.5V to V
CC
0.5V
20 mA
r
20 mA
r
25 mA
r
75 mA
65
q
C to
150
q
C
Recommended Operating
Conditions
(Note 3)
Supply Voltage (V
CC
)
Input Voltage (V
IN
)
Output Voltage (V
OUT
)
Operating Temperature (T
OPR
)
Input Rise and Fall Time (t
r
, t
f
)
V
CC
V
CC
3.3V
r
0.3V
5.0V
r
0.5V
0
a
100 ns/V
0
a
20 ns/V
2.0V to
5.5V
0V to
5.5V
0V to V
CC
40
q
C to
85
q
C
Note 2:
Absolute Maximum Ratings are values beyond which the device
may be damaged or have its useful life impaired. The databook specifica-
tions should be met, without exception, to ensure that the system design is
reliable over its power supply, temperature, and output/input loading vari-
ables. Fairchild does not recommend operation outside databook specifica-
tions.
Note 3:
Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
OH
Parameter
HIGH Level
Input Voltage
LOW Level
Input Voltage
HIGH Level
Output Voltage
V
CC
(V)
2.0
3.0
5.5
2.0
3.0
5.5
2.0
3.0
4.5
3.0
4.5
V
OL
LOW Level
Output Voltage
2.0
3.0
4.5
3.0
4.5
I
IN
I
CC
Input Leakage Current
Quiescent Supply Current
0
5.5
5.5
1.9
2.9
4.4
2.58
3.94
0.0
0.0
0.0
0.1
0.1
0.1
0.36
0.36
2.0
3.0
4.5
T
A
Min
1.50
0.7 V
CC
0.50
0.3 V
CC
1.9
2.9
4.4
2.48
3.80
0.1
0.1
0.1
0.44
0.44
V
I
OL
I
OL
V
IN
V
IN
4 mA
8 mA
V
V
V
IN
I
OH
I
OH
V
IH
I
OL
or V
IL
V
25
q
C
Typ
Max
T
A
40
q
C to
85
q
C
Max
Min
1.50
0.7 V
CC
Units
V
Conditions
0.50
0.3 V
CC
V
V
IN
V
IH
I
OH
or V
IL
50
P
A
4 mA
8 mA
50
P
A
r
0.1
4.0
r
1.0
40.0
P
A
P
A
5.5V or GND
V
CC
or GND
3
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