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MC14520B Folha de dados(PDF) 1 Page - Motorola, Inc

Nome de Peças MC14520B
Descrição Electrónicos  DUAL UP COUNTERS
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Fabricante Electrônico  MOTOROLA [Motorola, Inc]
Página de início  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC14520B Folha de dados(HTML) 1 Page - Motorola, Inc

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MOTOROLA CMOS LOGIC DATA
409
MC14518B MC14520B
Dual Up Counters
The MC14518B dual BCD counter and the MC14520B dual binary counter
are constructed with MOS P–channel and N–channel enhancement mode
devices in a single monolithic structure. Each consists of two identical,
independent, internally synchronous 4–stage counters. The counter stages
are type D flip–flops, with interchangeable Clock and Enable lines for
incrementing on either the positive–going or negative–going transition as
required when cascading multiple stages. Each counter can be cleared by
applying a high level on the Reset line. In addition, the MC14518B will count
out of all undefined states within two clock periods. These complementary
MOS up counters find primary use in multi–stage synchronous or ripple
counting applications requiring low power dissipation and/or high noise
immunity.
• Diode Protection on All Inputs
• Supply Voltage Range = 3.0 Vdc to 18 Vdc
• Internally Synchronous for High Internal and External Speeds
• Logic Edge–Clocked Design — Incremented on Positive Transition of
Clock or Negative Transition on Enable
• Capable of Driving Two Low–power TTL Loads or One Low–power
Schottky TTL Load Over the Rated Temperature Range
MAXIMUM RATINGS* (Voltages Referenced to VSS)
Symbol
Parameter
Value
Unit
VDD
DC Supply Voltage
– 0.5 to + 18.0
V
Vin, Vout Input or Output Voltage (DC or Transient)
0.5 to VDD + 0.5
V
Iin, Iout
Input or Output Current (DC or Transient),
per Pin
± 10
mA
PD
Power Dissipation, per Package†
500
mW
Tstg
Storage Temperature
– 65 to + 150
_C
TL
Lead Temperature (8–Second Soldering)
260
_C
* Maximum Ratings are those values beyond which damage to the device may occur.
†Temperature Derating:
Plastic “P and D/DW” Packages: – 7.0 mW/
_C From 65_C To 125_C
Ceramic “L” Packages: – 12 mW/
_C From 100_C To 125_C
TRUTH TABLE
Clock
Enable
Reset
Action
1
0
Increment Counter
0
0
Increment Counter
X
0
No Change
X
0
No Change
0
0
No Change
1
0
No Change
X
X
1
Q0 thru Q3 = 0
X = Don’t Care
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
© Motorola, Inc. 1995
REV 3
1/94
MC14518B
MC14520B
L SUFFIX
CERAMIC
CASE 620
ORDERING INFORMATION
MC14XXXBCP
Plastic
MC14XXXBCL
Ceramic
MC14XXXBDW
SOIC
TA = – 55° to 125°C for all packages.
P SUFFIX
PLASTIC
CASE 648
DW SUFFIX
SOIC
CASE 751G
This device contains protection circuitry to
guard against damage due to high static
voltages or electric fields. However, pre-
cautions must be taken to avoid applications of
any voltage higher than maximum rated volt-
ages to this high–impedance circuit. For proper
operation, Vin and Vout should be constrained
to the range VSS v (Vin or Vout) v VDD.
Unused inputs must always be tied to an
appropriate logic voltage level (e.g., either VSS
or VDD). Unused outputs must be left open.
BLOCK DIAGRAM
VDD = PIN 16
VSS = PIN 8
3
4
5
6
14
13
12
11
C
C
R
R
Q3
Q2
Q1
Q0
Q3
Q2
Q1
Q0
CLOCK
1
2
CLOCK
ENABLE
ENABLE
7
9
10
15


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