18-bit universal bus transceiver from the 74FCT family
The CY74FCT162501T, branded as 74FCT162501ATPVCT, is an 18-bit universal bus transceiver from the 74FCT logic family. It combines D-type latches and D-type flip-flops to allow operation in transparent, latched, or clocked modes, making it suitable for bidirectional data flow between two buses in multiplexed or registered environments. Operating from a 4.5V to 5.5V supply, it is specified over the industrial temperature range of -40°C to 85°C. Outputs source and sink 24mA each, providing enough drive for moderate fan-out on a backplane or memory bus. Housed in a 56-lead SSOP (0.295" body width, 7.50mm pitch) with surface-mount termination, it is a drop-in footprint for designs needing 18-bit bidirectional bus-hold or registered transceiver functions.
What the 24mA output drive means for your bus
The 24mA output high and low current rating is the drive strength available at the VOH and VOL levels specified in the datasheet. For a 50Ω transmission line on a PCB, 24mA can drive about 1.2V swing — enough for TTL-level interfaces but not LVDS or GTL. In practice, this part is best suited for 5V-tolerant backplane or memory bus applications where the trace impedance is higher (75Ω to 100Ω) and the required voltage swing is 3.3V or 5V.
Package and footprint: 56-SSOP
The 56-BSSOP package (0.295" body width, 7.50mm pitch) is the industry-standard SSOP-56 footprint. The supplier device package is listed as 56-SSOP, which is the same mechanical outline. When laying out the PCB, use the standard SSOP-56 land pattern; the 0.025" (0.635mm) lead pitch demands a fine-pitch soldering profile. No exposed pad, so thermal dissipation is through the leads only.
Lifecycle and procurement
The product status is Active, meaning the manufacturer continues to produce this part with no announced end-of-life. This removes the urgency of a last-time-buy for new designs, though stock availability at any given moment varies. For current pricing and lead time, submit an RFQ — we source through our distribution network and confirm availability at quote time.