Datasheet > HCC4521B

HCC4521B

更新时间： 2024-11-11 23:54:55

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
6页	240K
描述

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数据手册

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HCC4521B 数据手册

HCC4521B

HCF4521B

24 - STAGE FREQUENCY DIVIDER

PRODUCT PREVIEW

VERY LOW QUIESCENT CURRENT

HIGH NOISE IMMUNITY

VOLTAGE SUPPLY RANGE 3V TO 18V

ALL STAGES ARE RESETTABLE

RESET DISABLES THE RC OSCILLATOR FOR

LOW STANDBY POWER DRAIN

RC AND CRYSTAL OSCILLATOR OUTPUT

ARE CAPABLE OF DRIVING EXTERNAL

LOADS

(Plastic Package)

(Ceramic Frit Seal Package)

(Micro Package)

(Plastic Chip Carrier)

ORDER CODES :

HCC4521 BF

HCF4521 BEY

HCF4521 BM1

HCF4521 BC1

PIN CONNECTION (top view)

DESCRIPTION

The HCC4521B and HCF4521B are monolithic in-

tegrated circuits, available in 16-lead dual-in-line

plastic or ceramic packages and plasticmicro pack-

ages.

The HCC4521B and HCF4521B have a chain of 24

flip-flopswith an input circuit thatallows three modes

of operation. The input circuit functions as a crystal

or an RC oscillator or as an input buffer for an ex-

ternal oscillator. Each flip-flop preforms a divide-by-

two function giving a total count of 2²⁴= 16, 777,

216. The count advances on the negative going

edge of the clock. Access is available to the final

seven stages giving the device added flexibility.

September 1990

1/6

12 3 4 5 6

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