MM74HC251M
Rochester Electronics
74FST3384QSR
MM74HC251MX
74ACT158SJ
SN74LS251M
MC74ACT157M
SN74LVC139ADGVR
Texas Instruments
SN74HCS157QDRQ1
SN74HCS151QDRQ1
SN74HCS153QDRQ1
CD4512BPWR
74AUP2G157GF,115
NC7SB3257L6X
74ACT157MTCX
MC74AC151D
74FST3345QSR
74FST3253DR2
74AC253SCX
74FST3245QSR
74FST3251DTR2