Active 20-bit buffer for 5V bus isolation
The IDT74FCT162827BTPV is a 20-bit non-inverting buffer with 3-state outputs, built on the FCT logic family and currently listed as Active by Renesas. This means it remains a valid BOM line for both sustaining production and new designs that need a 5V-tolerant bus isolator. Each of the two 10-bit elements can independently tri-state its outputs, letting you isolate memory banks, peripheral buses, or data paths without external transceiver logic.
Supply and drive — what the 5V rail and 32/64mA mean on the bench
If your bus is mixed-voltage, you need a level translator on the input side or a separate 5V supply for this device. The output drive is rated 32mA source and 64mA sink per channel. That sink current is enough to drive a heavily loaded backplane or a long trace without needing a separate line driver — useful when the downstream load capacitance is above 50pF per line. The propagation delay will shift across this range, so timing closure should use the max datasheet values at 85°C, not the 25°C typical.
Package and board-fit: 56-TFSOP land pattern notes
The part comes in a 56-lead TFSOP (4.40mm body width, 0.173" pitch) with a supplier device package of 56-TVSOP. The fine pitch means the PCB land pattern must match the JEDEC MO-153 variation — a 0.50mm pad width with 0.65mm pitch between adjacent leads is typical. Bulk packaging (not tape-and-reel) means the parts ship in tubes or trays. If your pick-and-place line expects reel-fed parts, you will need to transfer them to tape or hand-place them — factor this into the assembly cost.
RoHS status — compliance check for EU shipments
This device is marked RoHS non-compliant. Confirm with your compliance team whether the application qualifies for an exemption (e.g., for high-reliability or military use).