| 449041 | DM74S257N | 7 V, TRI-STATE quad 1 of 2 data selector/multiplexer | National Semiconductor |
| 449042 | DM74S258 | Quad TRI-STATE 2-to-1 Line Data Selector/Multiplexer (Inverting) | National Semiconductor |
| 449043 | DM74S258N | 7 V, TRI-STATE quad 1 of 2 data selector/multiplexer | National Semiconductor |
| 449044 | DM74S280 | 9-Bit Parity Generator/Checker | Fairchild Semiconductor |
| 449045 | DM74S280 | 9-Bit Parity Generator/Checker | National Semiconductor |
| 449046 | DM74S280M | 9-Bit Parity Generator/Checker | Fairchild Semiconductor |
| 449047 | DM74S280M | 7 V, 9-bit parity generator/checker | National Semiconductor |
| 449048 | DM74S280N | 9-Bit Parity Generator/Checker | Fairchild Semiconductor |
| 449049 | DM74S280N | 7 V, 9-bit parity generator/checker | National Semiconductor |
| 449050 | DM74S283 | 4-Bit Binary Adder with Fast Carry | Fairchild Semiconductor |
| 449051 | DM74S283 | 4-Bit Binary Adder with Fast Carry | National Semiconductor |
| 449052 | DM74S283N | 4-Bit Binary Adder with Fast Carry | Fairchild Semiconductor |
| 449053 | DM74S283N | 7 V, 4-bit binary adder with fast carry | National Semiconductor |
| 449054 | DM74S287AJ | 30 ns, (256 x 4) 1024-bit TTL PROM | National Semiconductor |
| 449055 | DM74S287AN | 30 ns, (256 x 4) 1024-bit TTL PROM | National Semiconductor |
| 449056 | DM74S287AV | 30 ns, (256 x 4) 1024-bit TTL PROM | National Semiconductor |
| 449057 | DM74S287J | 50 ns, (256 x 4) 1024-bit TTL PROM | National Semiconductor |
| 449058 | DM74S287N | 50 ns, (256 x 4) 1024-bit TTL PROM | National Semiconductor |
| 449059 | DM74S287V | 50 ns, (256 x 4) 1024-bit TTL PROM | National Semiconductor |
|
| 449060 | DM74S288 | 256-BIT TTL PROM | National Semiconductor |
| 449061 | DM74S288AJ | 256-BIT TTL PROM | National Semiconductor |
| 449062 | DM74S288AN | 256-BIT TTL PROM | National Semiconductor |
| 449063 | DM74S288AV | 256-BIT TTL PROM | National Semiconductor |
| 449064 | DM74S288J | 256-BIT TTL PROM | National Semiconductor |
| 449065 | DM74S288N | 256-BIT TTL PROM | National Semiconductor |
| 449066 | DM74S288N | 256-BIT TTL PROM | National Semiconductor |
| 449067 | DM74S288V | 256-BIT TTL PROM | National Semiconductor |
| 449068 | DM74S289J | 4.75 V to 5.25 V, 64-bit (16 x 4) open-collector RAM TRI-STATE RAM | National Semiconductor |
| 449069 | DM74S289N | 4.75 V to 5.25 V, 64-bit (16 x 4) open-collector RAM TRI-STATE RAM | National Semiconductor |
| 449070 | DM74S299 | 3-STATE 8-Bit Universal Shift/Storage Register | Fairchild Semiconductor |
| 449071 | DM74S299 | TRI-STATE 8-Bit Universal Shift/Storage Register | National Semiconductor |
| 449072 | DM74S299N | 3-STATE 8-Bit Universal Shift/Storage Register | Fairchild Semiconductor |
| 449073 | DM74S299N | 7 V, TRI-STATE 8-bit universal shift/storage register | National Semiconductor |
| 449074 | DM74S30 | 8-Input NAND Gate | Fairchild Semiconductor |
| 449075 | DM74S30 | 8-Input NAND Gate | National Semiconductor |
| 449076 | DM74S30N | 8-Input NAND Gate | Fairchild Semiconductor |
| 449077 | DM74S32 | Quad 2-Input OR Gate | Fairchild Semiconductor |
| 449078 | DM74S32 | Quad 2-Input OR Gate | National Semiconductor |
| 449079 | DM74S373 | 3-STATE Octal D-Type Transparent Latches and Edge-Triggered Flip-Flops | Fairchild Semiconductor |
| 449080 | DM74S373 | TRI-STATE Octal D-Type Transparent Latches and Edge-Triggered Flip-Flops | National Semiconductor |
