© Semiconductor Components Industries, LLC, 2000

March, 2000 – Rev. 3

1

Publication Order Number:

MC14518B/D

MC14518B

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.

of Clock or Negative Transition on Enable

Schottky TTL Load Over the Rated Temperature Range

Symbol

Parameter

Value

Unit

DC Supply Voltage Range

– 0.5 to +18.0

V

Input or Output Voltage Range

(DC or Transient)

V

Input or Output Current

(DC or Transient) per Pin

±10

mA

Power Dissipation,

per Package (Note 3.)

500

mW

Operating Temperature Range

– 55 to +125

°C

Storage Temperature Range

– 65 to +150

°C

Lead Temperature

(8–Second Soldering)

260

°C

2. Maximum Ratings are those values beyond which damage to the device

may occur.

3. Temperature Derating:

Plastic “P and D/DW” Packages: – 7.0 mW/

_C From 65_C To 125_C

This device contains protection circuitry to guard against damage due to high

static voltages or electric fields. However, precautions must be taken to avoid

applications of any voltage higher than maximum rated voltages to this

Unused inputs must always be tied to an appropriate logic voltage level (e.g.,

http://onsemi.com

A

= Assembly Location

WL or L

= Wafer Lot

YY or Y

= Year

WW or W = Work Week

Device

Package

Shipping

ORDERING INFORMATION

MC14518BCP

PDIP–16

2000/Box

MC14518BDW

SOIC–16

47/Rail

MARKING

DIAGRAMS

1

16

PDIP–16

P SUFFIX

CASE 648

MC14518BCP

AWLYYWW

MC14518BDWR2

SOIC–16

1000/Tape & Reel

SOIC–16

DW SUFFIX

CASE 751G

1

16

14518B

AWLYYWW

1. For ordering information on the EIAJ version of

the SOIC packages, please contact your local

ON Semiconductor representative.

SOEIAJ–16

F SUFFIX

CASE 966

1

16

MC14518B

AWLYWW

MC14518BF

SOEIAJ–16

See Note 1.

MC14518BFEL

SOEIAJ–16

See Note 1.