54LS670DM is a Register File by Rochester Electronics, 4.5V ~ 5.5V supply voltage, in 16-SOIC (0.154", 3.90mm Width) package, rated for -55°C ~ 125°C (TA).
54LS670DMQB is a Register File by Rochester Electronics, 4.5V ~ 5.5V supply voltage, in 16-CDIP (0.300", 7.62mm) package, rated for -55°C ~ 125°C (TA).
54LS670FM is a Register File by Rochester Electronics, 4.5V ~ 5.5V supply voltage, in 16-SOIC (0.154", 3.90mm Width) package, rated for -55°C ~ 125°C (TA).
54LS670J/883 is a Register File by Rochester Electronics, 4.5V ~ 5.5V supply voltage, in 16-CDIP (0.300", 7.62mm) package, rated for -55°C ~ 125°C (TA).