74VHC161N Fairchild Semiconductor, 74VHC161N Datasheet - Page 3

• Manufacturer Part Number: 74VHC161N
• Description: IC COUNTER BINARY 4BIT 16DIP
• Manufacturer: Fairchild Semiconductor
• Series: 74VHCr

Specifications of 74VHC161N

• Logic Type: Binary Counter
• Direction: Up
• Number Of Elements: 1
• Number Of Bits Per Element: 4
• Reset: Asynchronous
• Timing: Synchronous
• Count Rate: 125MHz
• Trigger Type: Positive Edge
• Voltage - Supply: 2 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

©1993 Fairchild Semiconductor Corporation
74VHC161 Rev. 1.4
Mode Select Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Block Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to
estimate propagation delays.
MR
H
H
H
H
L
PE
X
H
H
H
L
CET CEP
H
X
X
X
L
X
X
H
X
L
Reset (Clear)
Load (P
Count (Increment)
No Change (Hold)
No Change (Hold)
Action on the Rising
Clock Edge (
n
→ Q
n
)
)
3
State Diagram
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