IW4516 Datasheet, PDF (1/6 Pages) List of Unclassifed Manufacturers – Presettable Up/Down Counter High-Voltage Silicon-Gate CMOS

TECHNICAL DATA
Presettable Up/Down Counter
High-Voltage Silicon-Gate CMOS
IW4516B
The IW4516B Presettable Binary Up/Down Counter consists of
four synchronously clocked D-type flip-flops (with a gating structure to
provide T-type flip-flop capability) connected as counters. This
counter can be cleared by a high level on the RESET line, and can be
preset to any binary number present on the jam inputs by a high level
on the PRESET ENABLE line.
If the CARRY-IN input is held low, the counter advances up or
down on each positive-going clock transition. Synchronous cascading
is accomplished by connecting all clock inputs in parallel and
connecting the CARRY-OUT of a less significant stage to the
CARRY-IN of a more significant stage.
The IW4516B can be cascaded in the ripple mode by connecting
the CARRY-OUT to the clock of the next stage. If the UP/DOWN
input changes during a terminal count, the CARRY-OUT must be
gated with the clock, and the UP/DOWN input must change while the
clock is high. This method provides a clean clock signal to the
subsequent counting stage.
• Operating Voltage Range: 3.0 to 18 V
• Maximum input current of 1 µA at 18 V over full package-
temperature range; 100 nA at 18 V and 25°C
• Noise margin (over full package temperature range):
1.0 V min @ 5.0 V supply
2.0 V min @ 10.0 V supply
2.5 V min @ 15.0 V supply
ORDERING INFORMATION
IW4516BN Plastic
IW4516BD SOIC
T_A = -55° to 125° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
PIN 16=V_CC
PIN 8= GND
FUNCTION TABLE
Inputs
Outputs
CL CI U/D PE R Mode
X H X L L NO COUNT
L H L L COUNT UP
L L L L COUNT
DOWN
X X X H L PRESET
X X X X H RESET
X = don’t care
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