15 ns propagation delay — timing closure on legacy 5V buses
The Microchip ATF22V10BQ-15SI is an electrically erasable programmable logic device (EE PLD) from the industry-standard 22V10 family, offering 10 macrocells each configurable as registered or combinatorial with programmable output polarity. The 15 ns propagation delay sets the combinatorial address-to-output path — at this speed, the part comfortably interfaces with 50 MHz-class 5V buses and memory systems without wait-state insertion.
5V-only supply — fixed-rail compatibility constraint
This device operates from a single 5V supply rail — there is no dual-voltage or 3.3V option. The input and output levels are 5V TTL-compatible, making it a direct drop-in for legacy 5V backplanes, memory interfaces, and glue-logic consolidation. If your system has migrated to 3.3V core logic, a level-shifter or a 3.3V-rated PLD variant is required.
24-SOIC wide-body — footprint and rework note
Packaged in a 24-SOIC wide-body (0.295", 7.50 mm width) — the 1.27 mm pitch is manageable with hand soldering under a microscope, but the wide body demands more PCB real estate than a narrow SOIC. Surface-mount only; no through-hole option in this suffix. The tube shipment is typical for PLDs in prototyping volume; production quantities may be sourced on tape-and-reel through the distributor channel.
Obsolete — lifecycle reality for this BOM line
Microchip has classified the ATF22V10BQ-15SI as Obsolete. For existing designs that require this exact part number, sourcing is through the surplus and broker market — independent distribution channels hold the remaining inventory. The 22V10 architecture itself is second-sourced by multiple vendors (Lattice, Cypress, Atmel legacy), but pin-compatibility and programming algorithm must be verified per alternate. A design-in of a newer 22V10-compatible PLD (e.g., the ATF22V10CQZ family) should be evaluated for new production builds.