Datasheet > ELM446

ELM446

更新时间： 2024-11-23 06:56:35

品牌	Logo	应用领域
ELM		电机
页数	文件大小	规格书
3页	23K
描述
50 HZ GENERATOR

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ELM446 数据手册

ELM446

50Hz Generator

Description

Features

The ELM446 is an 8 pin digital divider integrated

• Low power CMOS design

circuit, that provides both 50Hz and 1Hz outputs

from a common 3.58MHz NTSC colourburst crystal.

• Wide supply range - 3.0 to 5.5 volt operation

• 3.58MHz crystal controlled operation

• Generates both 50Hz and 1Hz references

• Low parts count

Externally, the designer need only provide the

crystal and two appropriate loading capacitors, as

well as a suitably bypassed power supply. Internal

oscillator circuits then use this reference frequency

to precisely derive a stable 50Hz signal. For

convenience, a complementary 50Hz signal is also

provided. This signal is then further divided to

provide a 1Hz signal output.

• Complementary 50Hz outputs

• High current drive outputs - up to 25 mA

A reset input is provided to restart the internal

counters, if desired. An active low signal on this pin

will also force all of the outputs to an open or tristate

condition.

Connection Diagram

PDIP and SOIC

(top view)

Applications

• Stable 50Hz reference

VDD

VSS

• Master oscillator for clock / timekeeping functions

1Hz

XT1

XT2

• Decimal based time reference for easier period

calculations

50Hz

reset

Block Diagram

VDD

reset

Master

Oscillator

Divider

÷ 50

1Hz

50Hz

XT1

XT2

ELM446DSB

Elm Electronics – Circuits for the Hobbyist

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