74LS161 데이터시트 – 4-Bit Binary Counters – Fairchild

74LS161 데이터시트를 통해서 부품의 기능 및 제조사와 핀배열을 확인 할 수 있습니다.

파트넘버 : 74LS161, 74161

기능 : Synchronous 4-Bit Binary Counters

제조사 : Fairchild Semiconductor

이미지 :
74LS161 데이터시트

상세내용 :

These synchronous, presettable counters feature an internal carry look-ahead for application in high-speed counting designs. The DM74LS161A and DM74LS163A are 4-bit binary counters. The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable inputs and internal gating.
This mode of operation eliminates the output counting spikes which are normally associated with asynchronous (ripple clock) counters. A buffered clock input triggers the four flip-flops on the rising (positive-going) edge of the clock input waveform.

74LS161 이미지

74LS161 데이터시트

 

 

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74190 데이터시트 – Synchronous UP/Down Counters – TI

74190 데이터시트를 통해서 부품의 기능 및 제조사와 핀배열을 확인 할 수 있습니다.

파트넘버 : 74190

기능 : SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL

제조사 : Texas Instruments

이미지 :

74190 이미지

특징 :

1. Counts 8-4-2-1 BCD or Binary
2. Single Down/Up Count Control Line
3. Count Enable Control Input
4. Ripple Clock Output for Cascading
5. Asynchronously Presettable with Load Control
6. Parallel Outputs
7. Cascadable for n-Bit Appications

핀배열 :

74190 데이터시트

상세내용 :

The ‘190, ‘LS190, ‘191, and ‘LS191 are synchronous, reversible up/down counters having a complexity of 58 equivalent gates. The ‘191 and ‘LS191 are 4-bit binary counters and the ‘190 and ‘LS190 are BCD counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the steering logic. This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple clock) counters.

공식홈페이지 : http://www.ti.com/product/sn74190

74190 데이터시트

 

 

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