Dual 4-input multiplexer (3-State) 74F253
FEATURES
• 3-State outputs for bus interface and multiplex expansion
• Common select inputs
• Separate Output Enable Inputs
DESCRIPTION
The 74F253 has two identical 4-input multiplexers with 3-State
outputs which select two bits from four sources selected by common
Select inputs (S0, S1). When the individual Output Enable (OEa,
OEb) inputs of the 4-input multiplexers are High, the outputs are
forced to a high impedance (Hi-Z) state.
The 74F253 is the logic implementation of a 2-pole, 4-position
switch; the position of the switch being determined by the logic
levels supplied to the two common Select inputs.
To avoid exceeding the maximum current ratings when the outputs
of the 3-State devices are tied together, all but one device must be
in the high-impedance state. Therefore, only one Output Enable
must be active at a time.
데이터시트 보기
* 본 제품은 경우에 따라 호환되는 타사 제품으로 변경될 수 있음을 알려 드립니다.
주문시 참고 하세요~~
|
