TTL multiplexer — 2-line input selection
The 54S257DM is a Texas Instruments TTL multiplexer that selects one of two 4-bit input groups and routes it to the output.
Active production, RoHS constraint
The RoHS non-compliance means this part uses lead-bearing solder terminations — a factor for BOMs that must meet RoHS directives.
Sourcing and fit for legacy designs
The active status means we can source it against an RFQ — confirm the exact quantity and target lead time with a quote request.