74HC253 High-Speed Si-Gate CMOS Dual 4-Bit Multiplexer IC
High-speed CMOS device with 3-state outputs and common select inputs
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Specifications:
- Propagation Delay: 17ns
- Input Capacitance: 3.5pF
- Ambient Temperature: -40°C to +125°C
- 3-State Output Enable Time: 30-100ns
- Power Dissipation Capacitance per Multiplexer: 55ns
- Output Transition Time: 14-60ns
- 3-State Output Disable Time: 41-150ns
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Features:
- Non-inverting data path
- 3-state outputs for bus interface and multiplex expansion
- Common select inputs
- Separate output enable inputs
- Package Includes: 1 x 74HC253 IC - (SMD Package) Dual 4-Bit Multiplexer IC (74253 IC)
The 74HC253 are high-speed Si-gate CMOS devices that are pin-compatible with low power Schottky TTL (LSTTL). They feature two identical 4-input multiplexer switches with 3-state outputs, allowing the selection of two bits from four sources based on common data select inputs (S0, S1).
When the individual output enable inputs (1OE, 2OE) of the 4-input multiplexers are set to HIGH, the outputs are forced to the high impedance OFF-state. The "253" represents the logic implementation of a 2-pole, 4-position switch, where the switch's position is determined by the logic levels applied to S0 and S1.
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