M54HCT393
M74HCT393
DUAL BINARY COUNTER
.
.
.
.
.
.
.
HIGH SPEED
f
MAX
= 80 MHz (TYP.) AT V
CC
= 5 V
LOW POWER DISSIPATION
I
CC
= 4
µA
(MAX.) AT T
A
= 25
°C
COMPATIBLE WITH TTL OUTPUTS
V
IH
= 2V (MIN.) V
IL
= 0.8V (MAX)
OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
|I
OH
| = I
OL
= 4 mA (MIN.)
BALANCED PROPAGATION DELAYS
t
PLH
= t
PHL
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS393
B1R
(Plastic Package)
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCT393F1R
M74HCT393M1R
M74HCT393B1R
M74HCT393C1R
DESCRIPTION
The M54/74HCT393 is a high speed CMOS DUAL
BINARY COUNTER fabricated in silicon gate
C
2
MOS technology. It has the same high speed
performance of LSTTL combined with true COMS
low power consumption.
This counter circuit contains independent ripple
carry counters and two 4-bit ripple carry binary
counters, which can be cascated to create a single
divide by 256 counter.
Each 4-bit counter is incremented on the high to low
transition (negative edge) of the clock input,and
each has an independent clear input. When clear is
set to high all four bits of each counter are set to a
low level. This enables count truncation and allows
the implementation of divide by N counter
configurations.
This integrated circuit has input and output
characteristics that are fully compatible with 54/74
LSTTL logic families. M54/74HCT devices are
designed to directly interface HSC
2
MOS systems
with TTL and NMOS components. They are also
plug in replacements for LSTTL devices giving a
reduction of power consumption.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
October 1993
NC =
No Internal
Connection
PIN CONNECTIONS
(top view)
1/12
M54/M74HCT393
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
INPUTS
CLOCK
X
CLEAR
H
L
L
X: Don’t Care
OUTPUS
QD
L
QC
L
COUNT UP
NO CHANGE
QB
L
QA
L
COUNT
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
OUTPUT
QD
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
QC
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
QB
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
QA
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
2/12
M54/M74HCT393
LOGIC DIAGRAM
TIMING CHART
3/12
M54/M74HCT393
PIN DESCRIPTION
PIN No
1, 13
2, 12
3, 4, 5, 6
7
14
SYMBOL
1 CLOCK
2 CLOCK
1 CLEAR
2 CLEAR
1QA to 1QD
GND
V
CC
NAME AND FUNCTION
Clock Input (HIGH to
LOW Edge triggered)
Asynchronouns Master
Reset Inputs
Flip Flop Outputs
Flip Flop Outputs
Ground (0V)
Positive Supply Voltage
IEC LOGIC SYMBOL
11, 10, 9, 8 2QA to 2QD
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
CC
I
O
or I
GND
P
D
T
stg
T
L
Parameter
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Source Sink Current Per Output Pin
DC V
CC
or Ground Current
Power Dissipation
Storage Temperature
Lead Temperature (10 sec)
Value
-0.5 to +7
-0.5 to V
CC
+ 0.5
-0.5 to V
CC
+ 0.5
±
20
±
20
±
25
±
50
500 (*)
-65 to +150
300
Unit
V
V
V
mA
mA
mA
mA
mW
o
o
C
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied.
(*) 500 mW:
≅
65
o
C derate to 300 mW by 10mW/
o
C: 65
o
C to 85
o
C
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
I
V
O
T
op
t
r
, t
f
Parameter
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature:
M54HC
Series
M74HC
Series
Input Rise and Fall Time (V
CC
= 4.5 to 5.5V)
Value
4.5 to 5.5
0 to V
CC
0 to V
CC
-55 to +125
-40 to +85
0 to 500
Unit
V
V
V
C
o
C
o
ns
4/12
M54/M74HCT393
DC SPECIFICATIONS
Test Conditions
Symbol
Parameter
V
CC
(V)
4.5
to
5.5
4.5
to
5.5
4.5
V
I
= I
O
=-20
µA
V
IH
or I
O
=-4.0 mA
V
IL
V
I
= I
O
= 20
µA
V
IH
or I
O
= 4.0 mA
V
IL
V
I
= V
CC
or GND
V
I
= V
CC
or GND
Per Input pin
V
I
= 0.5V or
V
I
= 2.4V
Other Inputs at
V
CC
or GND
4.4
4.18
4.5
4.31
0.0
0.17
0.1
0.26
±0.1
4
2.0
T
A
= 25 C
54HC and 74HC
Min. Typ. Max.
2.0
o
Value
-40 to 85
o
C -55 to 125
o
C
74HC
54HC
Min. Max. Min. Max.
2.0
2.0
Unit
V
IH
High Level Input
Voltage
Low Level Input
Voltage
High Level
Output Voltage
V
V
IL
0.8
0.8
0.8
V
V
OH
4.4
4.13
0.1
0.33
±1
40
2.9
4.4
4.10
0.1
V
0.4
±1
80
3.0
µA
µA
mA
V
V
OL
Low Level Output
Voltage
4.5
I
I
I
CC
∆I
CC
Input Leakage
Current
Quiescent Supply
Current
Additional worst
case supply
current
5.5
5.5
5.5
5/12
