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74LS90 Даташит - Motorola => Freescale

Номер в каталогеОписание (Функция)производитель
74LS90 DECADE COUNTER / DIVIDE-BY-TWELVE COUNTER / 4-BIT BINARY COUNTER Motorola
Motorola => Freescale Motorola
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74LS90 Datasheet PDF : 74LS90 pdf   
74LS90 image

The SN54/74LS90, SN54/74LS92 andSN54/74LS93 are high-speed 4-bitripple type counters partitioned intotwo sections. Each counter has a divide-by-twosection andeither a divide-by-five (LS90), divide-by-six (LS92) or divide-by-eight(LS93) section which are triggered by a HIGH-to-LOW transition on the clock inputs.

74LS90

1. Low Power Consumption . . . Typically 45 mW
2. High Count Rates . . . Typically 42 MHz
3. Choice of Counting Modes . . . BCD, Bi-Quinary, Divide-by-Twelve, Binary
4. Input Clamp Diodes Limit High Speed Termination Effects

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