The FCT257T is a high-speed quad 2-input multiplexer built using an advanced dual metal CMOS technology. This product has low input and output leakage, CMOS power levels, True TTL input and output compatibility, high drive outputs, meet or exceed JEDEC standard 18 specifications, military product compliant to MIL-STD-883, Class B and DESC listed (dual marked)
The IDT FAST CMOS quad 2‑input multiplexer provides four independent data paths selectable via a common select input. It features low input and output leakage (<1 pA), true TTL compatibility, and high‑drive outputs (‑15 mA IOH, 48 mA IOL) suitable for bus‑oriented systems.
The device is offered in industrial (SOIC, QSOP) and military (CERDIP, LCC) packages, operates from 0.5 V to 7 V supply, and meets JEDEC and MIL‑STD‑883 specifications. Detailed electrical, power‑supply, and switching characteristics are provided, along with test circuits and ordering information.
| Input leakage | <1 pA (max) |
|---|---|
| Output high drive (IOH) | -15 mA |
| Output low drive (IOL) | 48 mA |
| Typical VOH | 3.3 V |
| Typical VOL | 0.3 V |
| Industrial temperature range | -40 °C to +85 °C |
| Military temperature range | -55 °C to +125 °C |
Industrial packages: SOIC and QSOP; Military packages: CERDIP and LCC.
The device operates with a terminal voltage range of –0.5 V to +7 V.
Yes, it complies with MIL‑STD‑883, Class B.