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74LS90 数据手册 ( 数据表 )

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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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零件编号
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DECADE COUNTER; DIVIDE-BY-TWELVE COUNTER; 4-BIT BINARY COUNTER
ON Semiconductor
DECADE COUNTER; DIVIDE-BY-TWELVE COUNTER; 4-BIT BINARY COUNTER
ON Semiconductor
Synchronous Decade Counter (Direct Clear)/Synchronous 4-bit Binary Counter (Direct Clear)/Synchronous Decade Counter (Synchronous Clear)/Synchronous 4-bit Binary Counter (Synchronous Clear)
Renesas Electronics
Synchronous Decade Counter (Direct Clear)/Synchronous 4-bit Binary Counter (Direct Clear)/Synchronous Decade Counter (Synchronous Clear)/Synchronous 4-bit Binary Counter (Synchronous Clear)
Hitachi -> Renesas Electronics
DECADE COUNTER; 4-BIT BINARY COUNTER
ON Semiconductor
Synchronous UP/Down Decade Counter Synchronous Up/Down 4-bit binary Counter
Hitachi -> Renesas Electronics
PRESETTABLE BCD/DECADE UP/DOWN COUNTER PRESETTABLE 4-BIT BINARY UP/DOWN COUNTER
ON Semiconductor
HC4520 DUAL 4 BIT BINARY COUNTER HC4518 DUAL DECADE COUNTER
STMicroelectronics
PRESETTABLE BCD/DECADE UP/DOWN COUNTER PRESETTABLE 4-BIT BINARY UP/DOWN COUNTER
ON Semiconductor
Synchronous UP/Down Decade Counter Synchronous Up/Down 4-bit binary Counter
Renesas Electronics

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