PDIP-20 bus driver — what the 4-bit ABT buffer means for your backplane
The SN74ABT2240N is a 4-bit bus driver from the ABT (Advanced BiCMOS Technology) family, packaged in a 20-pin PDIP. The 4-bit width means it buffers four independent signal lines, typically used on memory-address or control buses where the driver must sink or source the capacitive load of multiple downstream loads without distorting the edge rate. The PDIP-20 package is a through-hole format — the 0.100-inch pitch rows fit standard prototyping grids and legacy backplane slots. For a board that already carries a 20-pin DIP socket, the SN74ABT2240N drops in without a layout change.
Active lifecycle — sourcing posture for this ABT buffer
RoHS non-compliance is flagged — the PDIP lead finish does not meet the RoHS exemption-free standard. For a BOM that requires full RoHS compliance, verify the soldering process compatibility or evaluate the lead-free package variant (SN74ABT2240N is the tin/lead version).