What this clock generator does on your board
The Cypress CY28325OC-3T is a Spread Spectrum Clock Generator that takes a single LVTTL or crystal input and fans it out to 19 clock outputs. The spread-spectrum modulation reduces peak EMI emissions on the clock lines, which can help pass radiated-emissions testing without extra shielding or ferrite beads. It integrates a PLL for frequency synthesis, though the divider/multiplier is fixed (no/yes). The part is rated for a maximum output frequency of 1 MHz, so it is suited for low-frequency clock distribution — think baseboard timing for legacy logic, microcontroller reference clocks, or audio-rate clocks — not high-speed serial links.
Supply rails and temperature — fit check
This part runs from two separate supply ranges: 2.375 V to 2.625 V (nominal 2.5 V) and 3.135 V to 3.465 V (nominal 3.3 V). That dual-rail capability lets it sit in mixed-voltage systems where the core logic is 2.5 V but the I/O bank is 3.3 V, or vice versa. The operating temperature range is 0°C to 70°C, so it is a commercial-grade part — fine for office equipment, telecom indoor racks, or consumer electronics, but not for outdoor, under-hood, or factory-floor environments where the ambient can dip below freezing or climb above 70°C.
Package and mounting — shelf and rework notes
Housed in a 48-lead SSOP (BSSOP, 0.295" body width, 7.50 mm), this is a surface-mount part. The supplier device package is 48-SSOP. The listing shows the shipping medium as Bulk, so it may arrive in tubes or trays rather than tape-and-reel — confirm the packaging format with your distributor if your pick-and-place line expects reels. Store the reels dry if they come in moisture-sensitive bags; SSOP packages are typically MSL 3, so bake before reflow if the seal is broken and the floor-life window has passed.
Lifecycle and sourcing reality
The CY28325OC-3T is listed as Active in production status, so there is no immediate obsolescence risk. It is RoHS non-compliant, which may matter for EU or California RoHS-regulated end products — verify your exemption or plan for a compliant alternative if needed. No official second-source or direct replacement is recorded in the manufacturer's cross-reference, but the CY2305SXI-1HT is a functionally similar fanout buffer from the same family — though it offers only 1:5 fanout and a wider temperature range, so it is not a pin-for-pin swap.