74F2640DCQR Octal bus transceiver with 25 Ohm series resistors in the outputs. Device with burn-in.
74F2640DCX Octal bus transceiver with 25 Ohm series resistors in the outputs. Devices shipped in 13 inches reels.
74F2640PCQR Octal Transceiver with Series Resistors Output
74F2640SCQR Octal bus transceiver with 25 Ohm series resistors in the outputs. Device with burn-in.