| 1251201 | NMC27C512ANE150 | 150 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) one time programmable CMOS PROM | National Semiconductor |
| 1251202 | NMC27C512ANE17 | 170 ns, Vcc=5V+/-5%, 524,288-bit (64k x 8) one time programmable CMOS PROM | National Semiconductor |
| 1251203 | NMC27C512ANE170 | 170 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) one time programmable CMOS PROM | National Semiconductor |
| 1251204 | NMC27C512ANE20 | 200 ns, Vcc=5V+/-5%, 524,288-bit (64k x 8) one time programmable CMOS PROM | National Semiconductor |
| 1251205 | NMC27C512ANE200 | 200 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) one time programmable CMOS PROM | National Semiconductor |
| 1251206 | NMC27C512ANE25 | 250 ns, Vcc=5V+/-5%,524,288-bit (64k x 8) one time programmable CMOS PROM | National Semiconductor |
| 1251207 | NMC27C512ANE250 | 250 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) one time programmable CMOS PROM | National Semiconductor |
| 1251208 | NMC27C512AQ15 | 150 ns, Vcc=5V+/-5%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251209 | NMC27C512AQ150 | 150 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251210 | NMC27C512AQ17 | 170 ns, Vcc=5V+/-5%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251211 | NMC27C512AQ170 | 170 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251212 | NMC27C512AQ20 | 200 ns, Vcc=5V+/-5%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251213 | NMC27C512AQ200 | 200 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251214 | NMC27C512AQ25 | 250 ns, Vcc=5V+/-5%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251215 | NMC27C512AQ250 | 250 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251216 | NMC27C512AQE150 | 150 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251217 | NMC27C512AQE170 | 170 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251218 | NMC27C512AQE200 | 200 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251219 | NMC27C512AQE250 | 250 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
|
| 1251220 | NMC27C512AQM150 | 150 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251221 | NMC27C512AQM170 | 170 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251222 | NMC27C512AQM200 | 200 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251223 | NMC27C512AQM250 | 250 ns, Vcc=5V+/-10%, 524,288-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251224 | NMC27C64 | 65,536-Bit (8192 x 8) CMOS PROM | National Semiconductor |
| 1251225 | NMC27C64N150 | 64KBit (8192 x 8) CMOS EPROM [Life-time buy] | Fairchild Semiconductor |
| 1251226 | NMC27C64N150 | 150 ns, Vcc=5V+/-10%, 65,536-bit (8k x 8) one time programmable CMOS PROM | National Semiconductor |
| 1251227 | NMC27C64N200 | 64KBit (8192 x 8) CMOS EPROM [Life-time buy] | Fairchild Semiconductor |
| 1251228 | NMC27C64N200 | 200 ns, Vcc=5V+/-10%, 65,536-bit (8k x 8) one time programmable CMOS PROM | National Semiconductor |
| 1251229 | NMC27C64N250 | 250 ns, Vcc=5V+/-10%, 65,536-bit (8k x 8) one time programmable CMOS PROM | National Semiconductor |
| 1251230 | NMC27C64NE150 | 64KBit (8192 x 8) CMOS EPROM [Life-time buy] | Fairchild Semiconductor |
| 1251231 | NMC27C64NE200 | 64KBit (8192 x 8) CMOS EPROM [Life-time buy] | Fairchild Semiconductor |
| 1251232 | NMC27C64Q150 | 64KBit (8192 x 8) CMOS EPROM [Life-time buy] | Fairchild Semiconductor |
| 1251233 | NMC27C64Q150 | 150 ns, Vcc=5V+/-10%, 65,536-bit (8k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251234 | NMC27C64Q200 | 64KBit (8192 x 8) CMOS EPROM [Life-time buy] | Fairchild Semiconductor |
| 1251235 | NMC27C64Q200 | 200 ns, Vcc=5V+/-10%, 65,536-bit (8k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251236 | NMC27C64Q250 | 64KBit (8192 x 8) CMOS EPROM [Life-time buy] | Fairchild Semiconductor |
| 1251237 | NMC27C64Q250 | 250 ns, Vcc=5V+/-10%, 65,536-bit (8k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251238 | NMC27C64Q300 | 300 ns, Vcc=5V+/-10%, 65,536-bit (8k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251239 | NMC27C64QE150 | 64KBit (8192 x 8) CMOS EPROM [Life-time buy] | Fairchild Semiconductor |
| 1251240 | NMC27C64QE150 | 150 ns, Vcc=5V+/-10%, 65,536-bit (8k x 8) UV erasable CMOS PROM | National Semiconductor |
