Arithmetic Logic Functions | MC14541B

プログラミング可能なタイマー発振器

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Overview

MC14541B プログラミング可能なタイマーは、16 ステージ・バイナリ・カウンタ、外部キャパシタと 2 つの抵抗とともに使用される統合型発振器、自動パワーオン・リセット回路、および出力制御ロジックで構成されます。タイミングが初期化されるのは、電源投入時です。この時点で、パワーオン・リセットが有効化され、カウンタが指定された VDD 範囲内で初期化されます。電源はすでにオンになっているので、外部リセット・パルスを適用できます。最初のリセット・コマンドが出されると、発振器は、外部 RC ネットワークにより決定された周波数で振動します。16 ステージ・カウンタは、発振器の周波数を分割します (n 番目のステージの周波数が fosc/2n の focs)。

  • Available Outputs 28, 210, 213 or 216
  • Increments on Positive Edge Clock Transitions
  • Built-in Low Power RC Oscillator (+/- 2% accuracy over temperature range and +/- 20% supply and +/- 3% over processing at < 10 kHz)
  • Oscillator May Be Bypassed if External Clock Is Available (Apply external clock to Pin 3)
  • External Master Reset Totally Independent of Automatic Reset Operation
  • Operates as 2n Frequency Divider or Single Transition Timer
  • Q/Qbar Select Provides Output Logic Level Flexibility
  • Reset (auto or master) Disables Oscillator During Resetting to Provide No Active Power Dissapation
  • Clock Conditioning Circuit Permits Operation with Very Slow Clock Rise and Fall Times
  • Automatic Reset Initializes All Counters On Power Up
  • Supply Voltage Range = 3.0 Vdc to 18 Vdc with Auto Reset Disabled (Pin 5 = VDD)
    8.5 Vdc to 18 Vdc with Auto Reset Enabled (Pin 5 = VSS)
  • Pb-Free Packages are Available*

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Case Outline

MSL Type

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VCC Min (V)

VCC Max (V)

tpd Max (ns)

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Reference Price

MC14541BDG

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Active

CAD Model

Pb

A

H

P

SOIC-14

751A-03

1

260

TUBE

55

N

Timer

3

18

10000

0.5

8

$0.3035

More Details

MC14541BDR2G

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Active

CAD Model

Pb

A

H

P

SOIC-14

751A-03

1

260

REEL

2500

N

Timer

3

18

10000

0.5

8

$0.2501

More Details

MC14541BDTR2G

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Active

CAD Model

Pb

A

H

P

TSSOP-14 WB

948G

1

260

REEL

2500

N

Timer

3

18

10000

0.5

8

$0.28

More Details

NLV14541BDG

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Obsolete

CAD Model

Pb

A

H

P

SOIC-14

751A-03

1

260

TUBE

55

N

Timer

3

18

10000

0.5

8

Price N/A

More Details

NLV14541BDR2G

Loading...

Active

CAD Model

Pb

A

H

P

SOIC-14

751A-03

1

260

REEL

2500

N

Timer

3

18

10000

0.5

8

$0.3769

More Details

NLV14541BDTR2G

Loading...

Active

CAD Model

Pb

A

H

P

TSSOP-14 WB

948G

1

260

REEL

2500

Y

Timer

3

18

10000

0.5

8

$0.2748

More Details

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