MC14516B ON Semiconductor, MC14516B Datasheet - Page 7

• Manufacturer Part Number: MC14516B
• Description: Binary Up/Down Counter
• Manufacturer: ON Semiconductor

INPUTS
on these inputs is loaded into the counter when PE is taken
high.
Cascading stages. Carry In is usually connected to Carry Out
of the previous stage. While high, Clock is inhibited.
decremented, depending on the direction of count, on the
positive transition of this input.
OUTPUTS
Binary data is present on these outputs with Q0
corresponding to the least significant bit.
Out is usually connected to Carry In of the next stage. This
synchronous output is active low and may also be used to
indicate terminal count.
P0, P1, P2, P3, Preset Inputs (Pins 4, 12, 13, 3) — Data
Carry In, (Pin 5) — This active–low input is used when
Clock, (Pin 15) — Binary data is incremented or
Q0, Q1, Q2, Q3, Binary outputs (Pins 6, 11, 14, 2) —
Carry Out, (Pin 7) — Used when cascading stages, Carry
Q
0
PRESET ENABLE
RESET
OR CARRY OUT
PARALLEL IN
CARRY IN OR
UP/DOWN
TOGGLE FLIP–FLOP
CLOCK
50%
t
su
PE
C
T
50%
t
w(H)
P
t
t
w
Q
Q
THL
90%
10%
Figure 2. Switching Time Waveforms
CARRY OUT ONLY
50%
PIN DESCRIPTIONS
http://onsemi.com
t
h
t
MC14516B
t
PLH
w(H)
t
t
rem
rem
7
CONTROLS
on the Preset Inputs. This pin is active high and inhibits the
clock when high.
puts to a low state. This pin is active high and inhibits the
clock when high.
high for up count, low for down count.
SUPPLY PINS
usually connected to ground.
connected to a positive supply voltage ranging from 3.0
volts to 18.0 volts.
PE, Preset Enable, (Pin 1) — Asynchronously loads data
R, Reset, (Pin 9) — Asynchronously resets the Q out–
Up/Down, (Pin 10) — Controls the direction of count,
V
V
SS
DD
X = Don’t Care
, Negative Supply Voltage, (Pin 8) — This pin is
, Positive Supply Voltage, (Pin 16) — This pin is
FLIP–FLOP FUNCTIONAL TRUTH TABLE
Enable
Preset
1
0
0
0
f
1
cl
t
PHL
Clock
10%
90%
X
t
t
TLH
PLH
X
X
T
0
1
V
V
V
V
V
V
V
V
V
V
DD
SS
DD
SS
DD
SS
OH
OL
DD
SS
Parallel In
Q
Q
Q
Q
n+1
n
n
n