M54HC161
RAD-HARD SYNCHRONOUS
PRESETTABLE 4-BIT COUNTER
s
s
s
s
s
s
s
s
s
s
s
HIGH SPEED:
f
MAX
= 62 MHz (TYP.) at V
CC
= 6V
LOW POWER DISSIPATION:
I
CC
=4µA(MAX.) at T
A
=25°C
HIGH NOISE IMMUNITY:
V
NIH
= V
NIL
= 28% V
CC
(MIN.)
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 4mA (MIN)
BALANCED PROPAGATION DELAYS:
t
PLH
≅
t
PHL
WIDE OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2V to 6V
PIN AND FUNCTION COMPATIBLE WITH
54 SERIES 161
SPACE GRADE-1: ESA SCC QUALIFIED
50 krad QUALIFIED, 100 krad AVAILABLE ON
REQUEST
NO SEL UNDER HIGH LET HEAVY IONS
IRRADIATION
DEVICE FULLY COMPLIANT WITH
SCC-9204-059
DILC-16
FPC-16
ORDER CODES
PACKAGE
DILC
FPC
FM
M54HC161D
M54HC161K
EM
M54HC161D1
M54HC161K1
DESCRIPTION
The M54HC161 is an high speed CMOS
SYNCHRONOUS 4-BIT BINARY PRESETTABLE
COUNTER fabricated with silicon gate C
2
MOS
technology.
The CLOCK input is active on the rising edge.
Both LOAD and CLEAR inputs are active LOW.
Presetting is synchronous on the rising edge of
the clock, the function is cleared asynchronously.
Two enable inputs (TE and PE) and CARRY
output are provided to enable easy cascading of
counters, which facilities easy implementation of
N-bit counters without using external gates.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
PIN CONNECTION
March 2004
1/12
M54HC161
IEC LOGIC SYMBOLS
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN N°
1
2
3, 4, 5, 6
7
10
9
14, 13, 12,
11
15
8
16
SYMBOL
CLEAR
CLOCK
A, B, C, D
PE
TE
LOAD
QA to QD
CARRY
GND
V
CC
NAME AND FUNCTION
Asynchronous Master
Reset
Clock Input (LOW to
HIGH, Edge-triggered)
Data Inputs
Count Enable Input
Count Enable Carry Input
Parallel Enable Input
Flip Flop Outputs
Terminal Count Output
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
INPUTS
CLEAR
L
H
H
H
H
H
LOAD
X
L
H
H
H
X
PE
X
X
X
L
H
X
TE
X
X
L
X
H
X
CLOCK
X
QA
L
A
OUTPUTS
FUNCTION
QB
L
B
QC
L
C
QD
L
D
RESET TO "0"
PRESET DATA
NO COUNT
NO COUNT
COUNT
NO COUNT
NO CHANGE
NO CHANGE
COUNT UP
NO CHANGE
X : Don’t Care
A, B, C, D : Logic level of data inputs
Carry : CARRY = TE·Q
A
·Q
B
·Q
C
·Q
D
2/12
M54HC161
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Current
Parameter
Value
-0.5 to +7
-0.5 to V
CC
+ 0.5
-0.5 to V
CC
+ 0.5
±
20
±
20
±
25
±
50
300
-65 to +150
265
Unit
V
V
V
mA
mA
mA
mA
mW
°C
°C
I
CC
or I
GND
DC V
CC
or Ground Current
Power Dissipation
P
D
T
stg
T
L
Storage Temperature
Lead Temperature (10 sec)
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
I
V
O
T
op
t
r
, t
f
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
Input Rise and Fall Time
V
CC
= 2.0V
V
CC
= 4.5V
V
CC
= 6.0V
Parameter
Value
2 to 6
0 to V
CC
0 to V
CC
-55 to 125
0 to 1000
0 to 500
0 to 400
Unit
V
V
V
°C
ns
ns
ns
4/12
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