74F191PC Fairchild Semiconductor, 74F191PC Datasheet - Page 3

• Manufacturer Part Number: 74F191PC
• Description: IC COUNTER DECADE UP/DOWN 16-DIP
• Manufacturer: Fairchild Semiconductor
• Series: 74Fr

Specifications of 74F191PC

• Logic Type: Binary Counter
• Direction: Up, Down
• Number Of Elements: 1
• Number Of Bits Per Element: 4
• Timing: Synchronous
• Count Rate: 100MHz
• Trigger Type: Positive Edge
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Reset: -
• Other names: 74F191

©1988 Fairchild Semiconductor Corporation
74F191 Rev. 1.0.2
Mode Select Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
PL
H
H
H
L
= LOW-to-HIGH Clock Transition
= LOW Pulse
CE
X
H
Inputs
L
L
U/D
H
X
X
L
Figure 2. Synchronous n-Stage Counter Using Ripple Carry/Borrow
CP
Figure 3. Synchronous n-Stage Counter with Gated Carry/Borrow
X
X
Count Up
Count Down
Preset (Asyn.)
No Change (Hold)
Figure 1. n-Stage Counter Using Ripple Clock
Mode
3
RC Truth Table
Note:
1. TC is generated internally.
CE
H
X
L
Inputs
TC
H
X
L
(1)
CP
X
X
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Output
RC
H
H