.HIGH SPEED
f
= 72 MHz (TYP.) AT VCC=5V
MAX
.LOWPOWER DISSIPATION
ICC=4µA(MAX.) AT TA=25°C
.HIGH NOISE IMMUNITY
V
NIH=VNIL
=28%VCC(MIN.)
.OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
.SYMMETRICALOUTPUT IMPEDANCE
|IOH|=IOL=4 mA (MIN.)
.BALANCEDPROPAGATION DELAYS
t
PLH=tPHL
.WIDE OPERATING VOLTAGERANGE
VCC(OPR)= 2 V TO 6 V
.PIN AND FUNCTION COMPATIBLE
WITH 54/74LS393
M54HC393
M74HC393
DUAL BINARY COUNTER
B1R
(PlasticPackage)
M1R
(MicroPackage)
ORDER CODES :
M54HC 393F1R M74H C393M1R
M74HC 393B1R M74HC3 93C1R
F1R
(CeramicPackage)
C1R
(Chip Carrier)
DESCRIPTION
The M54/74HC393 is a high speed CMOS DUAL
BINARY COUNTER fabricated in silicon gate
C2MOS technology. It has the same high speed
performance of LSTTL combined with true COMS
low powerconsumption.
This counter circuit contains independent ripple
carry counters and two 4-bit ripple carry binary
counters, which can be cascated to create a single
divideby 256 counter.
Each4-bit counter is incremented onthe hightolow
transition (negative edge) of the clock input,and
eachhas an independent clear input. When clearis
set to low all four bits of each counter are set to a
low level. This enables count truncation and allows
the implementation od divide by N counter
configurations.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
PIN CONNECTIONS (top view)
NC =
No Internal
Connection
February 1993
1/12
M54/M74HC393
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
INPUTS OUTPUS
CLOCK CLEAR QD QC QB QA
XHLLLL
L COUNT UP
L NO CHANGE
X:Don’tCare
COUNT
0LLLL
1LLLH
2LLHL
3LLHH
4LHLL
5LHLH
6LHHL
7LHHH
8HLLL
9HLLH
10HLHL
11 H L H H
12 H H L L
13HHLH
14 H H H L
15HHHH
QD QC QB QA
OUTPUT
2/12
LOGI C DI AGRAM
M54/M74HC393
TIM ING C HAR T
3/12
M54/M74HC393
PIN DESCRIPTION
IEC LOGIC SYMBOL
PIN No SYMBOL NAME AND FUNCTION
1, 13 1 CLOCK A
2 CLOCK A
2, 12 1 CLEAR
2 CLEAR
Clocck Input (HIGH to
LOW Edge triggered)
Asynchronouns Master
Reset Inputs
3, 4, 5, 6 1QA to 1QD Flip Flop Outputs
11, 10, 9, 8 2QA to 2QD Flip Flop Outputs
7 GND Ground (0V)
14 V
CC
Positive Supply Voltage
ABSOLU TE M AXIMU M R AT INGS
Symbol Parameter Value Unit
V
CC
V
V
O
I
IK
I
OK
I
O
or I
I
CC
P
D
T
stg
T
L
AbsoluteMaximumRatings arethosevalues beyondwhichdamage tothedevicemay occur.Functional operationunder these conditionisnotimplied.
(*)500 mW:≅ 65oC derateto300mWby 10mW/oC: 65oCto85oC
Supply Voltage -0.5 to +7 V
DC Input Voltage -0.5 to VCC+ 0.5 V
I
DC Output Voltage -0.5 to VCC+ 0.5 V
DC Input Diode Current ± 20 mA
DC Output Diode Current ± 20 mA
DC Output Source Sink Current Per Output Pin ± 25 mA
DC VCCor Ground Current ± 50 mA
GND
Power Dissipation 500 (*) mW
Storage Temperature -65 to +150
Lead Temperature (10 sec) 300
o
C
o
C
RECO MM ENDED OPERAT IN G CO NDITIONS
Symbol Parameter Value Unit
Supply Voltage 2 to 6 V
CC
Input Voltage 0 to V
I
Output Voltage 0 to V
O
Operating Temperature: M54HC Series
op
M74HC Series
CC
CC
-55 to +125
-40 to +85
Input Rise and Fall Time VCC= 2 V 0 to 1000 ns
V
= 4.5 V 0 to 500
CC
= 6 V 0 to 400
V
CC
4/12
V
T
t
V
V
r,tf
V
V
o
C
o
C
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