The IMIFS781BT is a spread spectrum clock generator with an integrated PLL, designed to reduce electromagnetic interference (EMI) by modulating the output clock frequency over a controlled range. It accepts CMOS or TTL input and delivers CMOS or TTL output up to 82 MHz, making it a fit for desktop PCs, office peripherals, consumer electronics, and other equipment that must pass radiated-emissions limits without bulky shielding. The single 1:1 input-to-output ratio means it generates one spread-spectrum clock from one reference — no fanout, no zero-delay buffering.
That rules out outdoor telecom cabinets, engine bays, or factory-floor environments where the ambient climbs above 70°C. If your design lives indoors on a desktop or inside an appliance, the temperature grade is fine.
Package and footprint
Housed in an 8-pin TSSOP (4.40 mm body width), surface-mount. No differential outputs — single-ended CMOS/TTL only. The divider/multiplier is marked No/No, so the output frequency is set by the reference and the PLL multiplication ratio (internal to the device, not user-configurable via external pins).
Lifecycle and sourcing posture
RoHS non-compliant per the listing, so if your BOM requires RoHS exemption or you're building for a market that enforces it, factor that in.