IN74ACT161 Datasheet, PDF (1/8 Pages) Integral Corp. – PRESETTABLE COUNTER

IN74ACT161
PRESETTABLE COUNTER
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
FUNCTION TABLE
Inputs
Outputs
Rese Load Enable Enable Clock Q0 Q1 Q2 Q3 Function
t
P
T
L
X
X
X
X
L L L L Reset to “0”
H
L
X
X
P0 P1 P2 P3 Preset Data
H
H
X
L
No change
No count
H
H
L
X
No change
No count
H
H
H
H
Count up
Count
H
X
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