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SL4516B 数据表(PDF) 1 Page - System Logic Semiconductor

部件名 SL4516B
功能描述  Presettable Up/Down Counter
Download  6 Pages
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制造商  SLS [System Logic Semiconductor]
网页  http://www.slsemicon.co.kr/e_index.htm
标志 SLS - System Logic Semiconductor

SL4516B 数据表(HTML) 1 Page - System Logic Semiconductor

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SL4516B
System Logic
Semiconductor
SLS
Presettable Up/Down Counter
High-Voltage Silicon-Gate CMOS
The SL4516B 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 SL4516B 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
SL4516BN Plastic
SL4516BD SOIC
TA = -55
° to 125° C for all packages
PIN ASSIGNMENT
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
LOGIC DIAGRAM
PIN 16=VCC
PIN 8= GND


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