IN74ACT161
P
RESETTABLE
C
OUNTER
High-Speed Silicon-Gate CMOS
The IN74ACT161 is identical in pinout to the LS/ALS161,
HC/HCT161. The IN74ACT161 may be used as a level converter
for interfacing TTL or NMOS outputs to High Speed CMOS Inputs.
The IN74ACT161 is programmable 4-bit synchronous modulo-
16 counter that feature parallel Load, asynchronous Reset, a
Carry Output for cascading and count-enable controls.
The IN74ACT161 is binary counter with asynchronous Reset.
TTL/NMOS Compatible Input Levels
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 4.5 to 5.5 V
Low Input Current: 1.0
µA;
0.1
µA
@ 25° C
Outputs Source/Sink 24 mA
•
•
•
•
•
ORDERING INFORMATION
IN74ACT161N Plastic
IN74ACT161D SOIC
T
A
= -40° to 85° C for all
packages
LOGIC DIAGRAM
PIN ASSIGNMENT
PIN 16 =V
CC
PIN 8 = GND
Inputs
Rese
t
L
H
H
H
H
H
Load
X
L
H
H
H
X
Enable
P
X
X
X
L
H
X
FUNCTION TABLE
Outputs
Enable
T
X
X
L
X
H
X
Clock
X
Q0
L
P0
Q1
Q2
Q3
L
P3
Function
Reset to “0”
Preset Data
No count
No count
Count
No count
L
L
P1
P2
No change
No change
Count up
No change
X=don’t care
P0,P1,P2,P3 = logic level of Data inputs
Ripple Carry Out = Enable T
•
Q0
•
Q1
•
Q2
•
Q3
1
IN74ACT161
MAXIMUM RATINGS
*
Symbol
Parameter
Value
Unit
V
CC
DC Supply Voltage (Referenced to GND)
-0.5 to +7.0
V
V
IN
DC Input Voltage (Referenced to GND)
-0.5 to V
CC
+0.5
V
V
OUT
DC Output Voltage (Referenced to GND)
-0.5 to V
CC
+0.5
V
I
IN
DC Input Current, per Pin
mA
±20
I
OUT
DC Output Sink/Source Current, per Pin
mA
±50
I
CC
DC Supply Current, V
CC
and GND Pins
mA
±50
P
D
Power Dissipation in Still Air, Plastic DIP+
750
mW
SOIC Package+
500
Tstg
Storage Temperature
-65 to +150
°C
260
T
L
Lead Temperature, 1 mm from Case for 10
°C
Seconds
(Plastic DIP or SOIC Package)
*
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C
SOIC Package: : - 7 mW/°C from 65° to 125°C
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
V
CC
DC Supply Voltage (Referenced to GND)
V
IN
, V
OUT
DC Input Voltage, Output Voltage (Referenced to
GND)
T
J
Junction Temperature (PDIP)
T
A
Operating Temperature, All Package Types
I
OH
Output Current - High
I
OL
Output Current - Low
t
r
, t
f
Input Rise and Fall Time
*
V
CC
=4.5 V
V
CC
=5.5 V
(except Schmitt Inputs)
*
V
IN
from 0.8 V to 2.0 V
Min
4.5
0
Max
5.5
V
CC
140
+85
-24
24
10
8.0
Unit
V
V
°C
°C
mA
mA
ns/V
-40
0
0
This device contains protection circuitry to guard against damage due to high static
voltages or electric fields. However, precautions must be taken to avoid applications of any voltage
higher than maximum rated voltages to this high-impedance circuit. For proper operation, V
IN
and
V
OUT
should be constrained to the range GND≤(V
IN
or V
OUT
)≤V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or
V
CC
). Unused outputs must be left open.
2
IN74ACT161
DC ELECTRICAL CHARACTERISTICS(Voltages
Referenced to GND)
Guaranteed
V
CC
Limits
Symbol
Parameter
Test Conditions
V
25
°C
-40°C to
85°C
V
IH
Minimum
High- V
OUT
=0.1 V or V
CC
-0.1 V 4.5
2.0
2.0
Level
Input
5.5
2.0
2.0
Voltage
V
IL
Maximum Low - V
OUT
=0.1 V or V
CC
-0.1 V 4.5
0.8
0.8
Level
Input
5.5
0.8
0.8
Voltage
V
OH
Minimum
High- I
OUT
≤
-50
µA
4.5
4.4
4.4
Level
Output
5.5
5.4
5.4
Voltage
*
V
IN
=V
IH
or V
IL
3.76
3.86
4.5
I
OH
=-24 mA
4.76
4.86
5.5
I
OH
=-24 mA
V
OL
Maximum
Low- I
OUT
≤
50
µA
4.5
0.1
0.1
Level
Output
5.5
0.1
0.1
Voltage
*
V
IN
= V
IH
or V
IL
0.44
0.36
4.5
I
OL
=24 mA
0.44
0.36
5.5
I
OL
=24 mA
I
IN
Maximum Input V
IN
=V
CC
or GND
5.5
±0.1
±1.0
Leakage Current
5.5
1.5
Additional Max. V
IN
=V
CC
- 2.1 V
∆I
CCT
I
CC
/Input
V
OLD
=1.65 V Max
I
OLD
+Minimum
5.5
75
Dynamic Output
Current
V
OHD
=3.85 V Min
I
OHD
+Minimum
5.5
-75
Dynamic Output
Current
V
IN
=V
CC
or GND
I
CC
Maximum
5.5
8.0
80
Quiescent Supply
Current
(per Package)
*
All outputs loaded; thresholds on input associated with output under test.
+Maximum test duration 2.0 ms, one output loaded at a time.
Unit
V
V
V
V
µA
mA
mA
mA
µA
3
IN74ACT161
AC ELECTRICAL CHARACTERISTICS(V
CC
=5.0V±10%, C
L
=50pF, Input t
r
=t
f
=3.0 ns)
Guaranteed Limits
Symbol
Parameter
Unit
25
°C
-40°C to
85°C
Min
Max
Min
Max
f
max
Maximum Clock Frequency (Figure 1)
115
100
MHz
t
PLH
Propagation Delay Clock to Q (Figure
1.5
9.5
1.5
10.5
ns
1)
t
PHL
Propagation Delay Clock to Q (Figure
1.5
10.5
1.5
11.5
ns
1)
t
PLH
Propagation Delay, Clock to Ripple
2.0
11.0
1.5
12.5
ns
Cary Out (Figure 1)
t
PHL
Propagation Delay, Clock to Ripple
1.5
12.5
1.5
13.5
ns
Cary Out (Figure 1)
t
PLH
Propagation Delay, Enable T to Ripple
1.5
8.5
1.5
10.0
ns
Carry Out (Figure 3)
t
PHL
Propagation Delay, Enable T to Ripple
1.5
9.5
1.5
10.5
ns
Carry Out (Figure 3)
t
PHL
Propagation Delay, Reset to Q (Figure
1.5
10.0
1.5
11.0
ns
2)
t
PHL
Propagation Delay, Reset to Ripple
2.5
13.5
2.0
14.5
ns
Cary Out (Figure 2)
C
IN
Maximum Input Capacitance
4.5
4.5
pF
Typical @25°C,V
CC
=5.0 V
45
C
PD
Power Dissipation Capacitance
pF
4
IN74ACT161
TIMING REQUIREMENTS
(V
CC
=5.0V±10%, C
L
=50pF,Input t
r
=t
f
=3.0 ns)
Guaranteed Limit
Symbol
Parameter
+25° C
-40° C
to +85° C
t
SU
Minimum Setup Time, Preset Data Inputs
9.5
11.5
to Clock (Figure 4)
t
h
Minimum Hold Time, Clock to Preset
0
0
Data Inputs (Figure 4)
t
SU
Minimum Setup Time,Load to Clock
8.5
9.5
(Figure 4)
t
h
Minimum Hold Time, Clock to Load
-0.5
-0.5
(Figure 4)
t
SU
Minimum Setup Time, Enable T or
5.5
6.5
Enable P to Clock (Figure 5)
t
h
Minimum Hold Time, Clock to Enable T
0
0
or Enable P (Figure 5)
t
w
Minimum Pulse Width, Clock (Load)
3.0
3.5
(Figure 1)
t
w
Minimum
Pulse
Width,
Clock
3.0
3.5
(Count)(Figure 1)
t
w
Minimum Pulse Width, Reset (Figure 2)
3.0
7.5
t
rec
Minimum Recovery Time, Reset to Clock
0
0.5
(Figure 2)
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
5
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