HCF4521B データシートの表示（PDF） - STMicroelectronics

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HCF4521B

24 STAGE FREQUENCY DIVIDER

STMicroelectronics 

HCF4521B

24-STAGE FREQUENCY DIVIDER

s HIGH NOISE IMMUNITY

s VOLTAGE SUPPLY RANGE 3V TO 18V

s ALL STAGE ARE PRESETTABLE

s RESET DISABLES THE RC OSCILLATOR

FOR LOW STANDBY POWER DRAIN

s RC AND CRYSTAL OSCILLATOR OUTPUT

ARE CAPABLE OF DRIVING EXTERNAL

LOADS

s QUIESCENT CURRENT SPECIF. UP TO 20V

s 5V, 10V AND 15V PARAMETRIC RATINGS

s INPUT LEAKAGE CURRENT

II = 100nA (MAX) AT VDD = 18V TA = 25°C

s 100% TESTED FOR QUIESCENT CURRENT

s MEETS ALL REQUIREMENTS OF JEDEC

JESD13B "STANDARD SPECIFICATIONS

FOR DESCRIPTION OF B SERIES CMOS

DEVICES"

DESCRIPTION

HCF4521B is a monolithic integrated circuit

fabricated in Metal Oxide Semiconductor

technology available in DIP and SOP packages.

HCF4521B has a chain of 24 flip-flops with an

input circuit that allows three modes of operation.

DIP

SOP

ORDER CODES

PACKAGE

TUBE

DIP

SOP

HCF4521BEY

HCF4521BM1

T&R

HCF4521M013TR

The input circuit functions as a crystal or RC

oscillator or as an input buffer for an external

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.

PIN CONNECTION

October 2002

1/12

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