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KODENSHI KOREA |
TECHNICAL DATA
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Presettable Counter
High-Speed Silicon-Gate CMOS
The KK74AC161 is identical in pinout to the LS/ALS161,
HC/HCT161. The device inputs are compatible with standard CMOS
outputs; with pullup resistors, they are compatible with LS/ALS outputs.
The KK74AC161 is programmable 4-bit synchronous modulo-16
counter that feature parallel Load, asynchronous Reset, a Carry Output for
cascading and count-enable controls.
The KK74AC161 is binary counter with asynchronous Reset.
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 µA; 0.1 µA @ 25° C
• High Noise Immunity Characteristic of CMOS Devices
• Outputs Source/Sink 24 mA
LOGIC DIAGRAM
KK74AC161
ORDERING INFORMATION
KK74AC161N Plastic
KK74AC161D SOIC
TA = -40° to 85° C for all packages
Outputs
PIN ASSIGNMENT
PIN 16 =VCC
PIN 8 = GND
FUNCTION TABLE
Inputs
Outputs
Reset Load Enable Enable Clock Q0 Q1 Q2 Q3
PT
Function
LX
X
X
X L L L L Reset to “0”
HL
X
X
P0 P1 P2 P3 Preset Data
HH
X
L
No change
No count
HH
L
X
No change
No count
HH
H
H
Count up
Count
HX
X
X
No change
No count
X=don’t care
P0,P1,P2,P3 = logic level of Data inputs
Ripple Carry Out = Enable T • Q0 • Q1 • Q2 • Q3
1
KK74AC161
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MAXIMUM RATINGS*
Symbol
Parameter
Value
VCC
VIN
VOUT
IIN
IOUT
ICC
PD
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC Supply Current, VCC and GND Pins
Power Dissipation in Still Air, Plastic DIP+
SOIC Package+
-0.5 to +7.0
-0.5 to VCC +0.5
-0.5 to VCC +0.5
±20
±50
±50
750
500
Tstg Storage Temperature
-65 to +150
TL Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
260
*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
Unit
V
V
V
mA
mA
mA
mW
°C
°C
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
VCC
VIN, VOUT
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
TJ Junction Temperature (PDIP)
TA Operating Temperature, All Package Types
IOH Output Current - High
IOL Output Current - Low
tr, tf Input Rise and Fall Time *
(except Schmitt Inputs)
* VIN from 30% to 70% VCC
VCC =3.0 V
VCC =4.5 V
VCC =5.5 V
Min Max Unit
2.0 6.0
V
0 VCC V
140 °C
-40 +85 °C
-24 mA
24 mA
0 150 ns/V
0 40
0 25
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, VIN and VOUT should be constrained to the range GND≤(VIN or
VOUT)≤VCC.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused
outputs must be left open.
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