The 74HC257 is a quad 2-input multiplexer with 3-state outputs. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.
Features:-
• Non-inverting data path
• 3-state outputs interface directly with system bus
• Complies with JEDEC standard no. 7A
• Input levels:
– For 74HC257: CMOS level
– For 74HCT257: TTL level
• ESD protection:
– HBM JESD22-A114F exceeds 2000 V
– MM JESD22-A115-A exceeds 200 V
• Multiple package options
Specification:-
| Symbol | Parameter | Value | Units |
| VCC | Supply Voltage | – 0.5 to + 7.0 | V |
| IIK | input clamping current | ±20 | mA |
| IOK | output clamping current | ±20 | mA |
| IO | output current | ±35 | mA |
| ICC | supply current | ±70 | mA |
* product image for illustration purposes only. actual product may vary.
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