Fairchild Semiconductor 74VHC393MX, 74VHC393MTCX, 74VHC393MTC, 74VHC393MSCX, 74VHC393M Datasheet
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March 1993
Revised March 1999
74VHC393 Dual 4-Bit Binary Counter
© 1999 Fairchild Semiconductor Corporation DS011571.prf www.fairchildsemi.com
74VHC393
Dual 4-Bit Binary Counter
General Description
The VHC393 is an advanced high speed CMOS 4-bit
Binary Counter fabricated with silicon gate CM OS technology. It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low
power dissipation. It contai ns two independ ent counter circuits in one package, so that counting or frequency division
of 8 binary bits can be achi eved with one IC. This de vice
changes state on the negative going transition of the
CLOCK
pulse. The counter can be reset to “0” (Q0–Q3 =
“L”) by a HIGH at the CLEAR input regardless of other
inputs.
An input protection circuit en sures that 0V to 7V can be
applied to the input pins without re gard to the supply volt-
age. This device can be used to interface 5V to 3V systems
and two supply systems such as ba ttery back up . This circuit prevents device destruction due to m isma tche d s upp l y
and input voltages.
Features
■ High Speed: f
MAX
= 170 MHz (typ) at TA = 25°C
■ Low power dissipation: I
CC
= 4 µA (max) at TA = 25°C
■ High noise immunity: V
NIH
= V
NIL
= 28% VCC (min)
■ Power down protection is provided on all inputs
■ Pin and function compatible with 74HC393
Ordering Code:
Surface mount packa ges are also available on Tape and Reel. Sp ec if y by appending the suffix letter “X” to the ordering co de.
Logic Symbol
IEEE/IEC
Connection Diagram
Pin Descriptions
Order Number Package Number Package Description
74VHC393M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow
74VHC393SJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHC393MTC MTC14 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74VHC393N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Pin Names Description
CLR1, CLR2 Clear Inputs
CP
1
, CP
2
Clock Pulse Inputs
QA, QB, QC, QD Outputs
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74VHC393
Truth Table
X: Don’t Care
System Diagram
Timing Chart
Inputs Outputs
CP
CLR QA QB QC QD
X H L L L L
L Count Up
L No Change
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74VHC393
Absolute Maximum Ratings(Note 1) Recommended Operating
Conditions
(Note 2)
Note 1: Absolute Maximum Ratings are valu es beyond whic h the device
may be damaged or ha ve its useful life impaire d. The datab ook specifications should be met, without exception, to ensure that the system design is
reliable over its p ower supp ly, temperature, and o utput/input loading variables. Fairchild does not recommend operation outside databook specifications.
Note 2: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Supply Voltage (VCC) −0.5V to +7.0V
DC Input Voltage (V
IN
) −0.5V to +7.0V
DC Output Voltage (V
OUT
) −0.5V to VCC + 0.5V
Input Diode Current (I
IK
) −20 mA
Output Diode Current (I
OK
) ±20 mA
DC Output Current (I
OUT
) ±25 mA
DC V
CC
/GND Current (ICC) ±75 mA
Storage Temperature (T
STG
) −65°C to +150°C
Lead Temperature (T
L
)
(Soldering, 10 seconds) 260°C
Supply Voltage (V
CC
) 2.0V to +5.5V
Input Voltage (V
IN
) 0V to +5.5V
Output Voltage (V
OUT
) 0V to V
CC
Operating Temperature (T
OPR
) −40°C to +85°C
Input Rise and Fall Time (t
r
, tf)
V
CC
= 3.3V ± 0.3V 0 ∼ 100 ns/V
V
CC
= 5.0V ± 0.5V 0 ∼ 20 ns/V
Symbol Parameter
V
CC
(V)
TA = 25°C T
A
= −40°C to +85°C
Units Conditions
Min Typ Max Min Max
V
IH
HIGH Level 2.0 1.50 1.50
V
Input Voltage 3.0 − 5.5 0.7 V
CC
0.7 V
CC
V
IL
LOW Level 2.0 0.50 0.50
V
Input Voltage 3.0 − 5.5 0.3 V
CC
0.3 V
CC
V
OH
HIGH Level 2.0 1.9 2.0 1.9
V
VIN = V
IHIOH
= −50 µA
Output Voltage 3.0 2.9 3.0 2.9 or V
IL
4.5 4.4 4.5 4.4
3.0 2.58 2.48
V
IOH = −4 mA
4.5 3.94 3.80 IOH = −8 mA
V
OL
LOW Level 2.0 0.0 0.1 0.1
V
VIN = V
IHIOL
= 50 µA
Output Voltage 3.0 0.0 0.1 0.1 or V
IL
4.5 0.0 0.1 0.1
3.0 0.36 0.44
V
IOL = 4 mA
4.5 0.36 0.44 IOL = 8 mA
I
IN
Input Leakage Current 0 − 5.5 ±0.1 ±1.0 µA VIN = 5.5V or GND
I
CC
Quiescent Supply Current 5.5 4.0 40.0 µA VIN = VCC or GND
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