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| 제조회사 : ANY |
| 판매가격 : 3,000원 |
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| 적립금액 : 0원 |
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| ★★★★★ |
| 신속하고 정확한 배송을 약속드립니다 |
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PRESETTABLE BCD/DECADE
UP/DOWN COUNTERS
PRESETTABLE 4-BIT BINARY
UP/DOWN COUNTERS
The SN54/74LS190 is a synchronous UP/DOWN BCD Decade (8421)
Counter and the SN54/74LS191 is a synchronous UP/DOWN Modulo-16
Binary Counter. State changes of the counters are synchronous with the
LOW-to-HIGH transition of the Clock Pulse input.
An asynchronous Parallel Load (PL) input overrides counting and loads the
data present on the Pn inputs into the flip-flops, which makes it possible to use
the circuits as programmable counters. A Count Enable (CE) input serves as
the carry / borrow input in multi-stage counters. An Up /Down Count Control
(U/D) input determines whether a circuit counts up or down. A Terminal Count
(TC) output and a Ripple Clock (RC) output provide overflow/underflow
indication and make possible a variety of methods for generating
carry /borrow signals in multistage counter applications.
• Low Power . . . 90 mW Typical Dissipation
• High Speed . . . 25 MHz Typical Count Frequency
• Synchronous Counting
• Asynchronous Parallel Load
• Individual Preset Inputs
• Count Enable and Up/Down Control Inputs
• Cascadable
• Input Clamp Diodes Limit High Speed Termination Effects
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주문시 참고 하세요~~
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