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PDF MC14518B Data sheet ( Hoja de datos )
| Número de pieza | MC14518B | |
| Descripción | (MC14518B / MC14520B) DUAL UP COUNTERS | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MC14518B (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎSchottky TTL Load Over the Rated Temperature Range
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎMAXIMUM RATINGS* (Voltages Referenced to VSS)
Symbol
Parameter
Value
Unit
VDD
Vin, Vout
Iin, Iout
DC Supply Voltage
Input or Output Voltage (DC or Transient)
Input or Output Current (DC or Transient),
per Pin
– 0.5 to + 18.0
0.5 to VDD + 0.5
± 10
V
V
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
X0
No Change
X 0 No Change
00
No Change
1 0 No Change
X X 1 Q0 thru Q3 = 0
X = Don’t Care
REV 3
1/94
©MMOotoTrOolaR, IOncL. A199C5MOS LOGIC DATA
MC14518B
MC14520B
L SUFFIX
CERAMIC
CASE 620
P SUFFIX
PLASTIC
CASE 648
DW SUFFIX
SOIC
CASE 751G
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14XXXBDW
Plastic
Ceramic
SOIC
TA = – 55° to 125°C for all packages.
CLOCK
1
2
ENABLE
7
CLOCK
9
10
ENABLE
15
BLOCK DIAGRAM
Q0
Q1
C
Q2
Q3
R
3
4
5
6
Q0
C Q1
Q2
R Q3
11
12
13
14
VDD = PIN 16
VSS = PIN 8
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
v voperation, Vin and Vout should be constrained
to the range VSS (Vin or Vout) 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.
MC14518B MC14520B
409
1 page  
Q0 Q1 Q2 Q3
RESET
ENABLE
CLOCK
DQ
CRQ
DQ
CRQ
DQ
CRQ
DQ
CRQ
Figure 4. Decade Counter (MC14518B) Logic Diagram
(1/2 of Device Shown)
Q0 Q1 Q2
Q3
RESET
ENABLE
CLOCK
DQ
CRQ
DQ
CRQ
DQ
CRQ
DQ
CRQ
Figure 5. Binary Counter (MC14520B) Logic Diagram
(1/2 of Device Shown)
MOTOROLA CMOS LOGIC DATA
MC14518B MC14520B
413
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet MC14518B.PDF ] | |
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