| 1251121 | NMC27C1024Q25 | 250 ns, Vcc=5V+/-5%, 1,048,576-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251122 | NMC27C1024Q250 | 250 ns, Vcc=5V+/-10%, 1,048,576-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251123 | NMC27C1024QE150 | 150 ns, Vcc=5V+/-10%, 1,048,576-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251124 | NMC27C1024QE170 | 170 ns, Vcc=5V+/-10%, 1,048,576-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251125 | NMC27C1024QE200 | 200 ns, Vcc=5V+/-10%, 1,048,576-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251126 | NMC27C1024QM170 | 170 ns, Vcc=5V+/-10%, 1,048,576-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251127 | NMC27C1024QM200 | 200 ns, Vcc=5V+/-10%, 1,048,576-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251128 | NMC27C1024V | 1,048,576-bit (64k x 8) UV erasable CMOS PROM | National Semiconductor |
| 1251129 | NMC27C128BN15 | 150 ns, Vcc=5V+/-5%, 131,072-bit (16k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251130 | NMC27C128BN150 | 150 ns, Vcc=5V+/-10%, 131,072-bit (16k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251131 | NMC27C128BN20 | 200 ns, Vcc=5V+/-5%, 131,072-bit (16k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251132 | NMC27C128BN200 | 200 ns, Vcc=5V+/-10%, 131,072-bit (16k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251133 | NMC27C128BN25 | 250 ns, Vcc=5V+/-5%, 131,072-bit (16k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251134 | NMC27C128BN250 | 250 ns, Vcc=5V+/-10%, 131,072-bit (16k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251135 | NMC27C128BQ15 | 150 ns, Vcc=5V+/-5%, 131,072-bit (16k x 8) high speed version UV erasable CMOS PROM | National Semiconductor |
| 1251136 | NMC27C128BQ150 | 150 ns, Vcc=5V+/-10%, 131,072-bit (16k x 8) high speed version UV erasable CMOS PROM | National Semiconductor |
| 1251137 | NMC27C128BQ20 | 200 ns, Vcc=5V+/-5%, 131,072-bit (16k x 8) high speed version UV erasable CMOS PROM | National Semiconductor |
| 1251138 | NMC27C128BQ200 | 200 ns, Vcc=5V+/-10%, 131,072-bit (16k x 8) high speed version UV erasable CMOS PROM | National Semiconductor |
| 1251139 | NMC27C128BQ25 | 250 ns, Vcc=5V+/-5%, 131,072-bit (16k x 8) high speed version UV erasable CMOS PROM | National Semiconductor |
|
| 1251140 | NMC27C128BQ250 | 250 ns, Vcc=5V+/-10%, 131,072-bit (16k x 8) high speed version UV erasable CMOS PROM | National Semiconductor |
| 1251141 | NMC27C128BQE150 | 150 ns, Vcc=5V+/-10%, 131,072-bit (16k x 8) high speed version UV erasable CMOS PROM | National Semiconductor |
| 1251142 | NMC27C128BQE200 | 200 ns, Vcc=5V+/-10%, 131,072-bit (16k x 8) high speed version UV erasable CMOS PROM | National Semiconductor |
| 1251143 | NMC27C128BQM150 | 150 ns, Vcc=5V+/-10%, 131,072-bit (16k x 8) high speed version UV erasable CMOS PROM | National Semiconductor |
| 1251144 | NMC27C128BQM200 | 200 ns, Vcc=5V+/-10%, 131,072-bit (16k x 8) high speed version UV erasable CMOS PROM | National Semiconductor |
| 1251145 | NMC27C16 | 16 /384-Bit (2048 x 8) CMOS EPROM | Fairchild Semiconductor |
| 1251146 | NMC27C16B | 16,384 Bit (2048 x 8) CMOS PROM | National Semiconductor |
| 1251147 | NMC27C16BQ | 16,384-Bit (2048 x 8) CMOS EPROM | Fairchild Semiconductor |
| 1251148 | NMC27C16BQ150 | 16,384-Bit (2048 x 8) CMOS EPROM | Fairchild Semiconductor |
| 1251149 | NMC27C16BQ200 | 16,384-Bit (2048 x 8) CMOS EPROM | Fairchild Semiconductor |
| 1251150 | NMC27C16BQE200 | 16,384-Bit (2048 x 8) CMOS EPROM | Fairchild Semiconductor |
| 1251151 | NMC27C256BN15 | 150 ns, Vcc=5V+/-5%, 262,144-bit (32k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251152 | NMC27C256BN150 | 150 ns, Vcc=5V+/-10%, 262,144-bit (32k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251153 | NMC27C256BN20 | 200 ns, Vcc=5V+/-5%, 262,144-bit (32k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251154 | NMC27C256BN200 | 200 ns, Vcc=5V+/-10%, 262,144-bit (32k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251155 | NMC27C256BN25 | 250 ns, Vcc=5V+/-5%, 262,144-bit (32k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251156 | NMC27C256BN250 | 250 ns, Vcc=5V+/-10%, 262,144-bit (32k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251157 | NMC27C256BNE15 | 150 ns, Vcc=5V+/-5%, 262,144-bit (32k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251158 | NMC27C256BNE150 | 150 ns, Vcc=5V+/-10%, 262,144-bit (32k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251159 | NMC27C256BNE20 | 200 ns, Vcc=5V+/-5%, 262,144-bit (32k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
| 1251160 | NMC27C256BNE200 | 200 ns, Vcc=5V+/-10%, 262,144-bit (32k x 8) high speed version one time programmable CMOS PROM | National Semiconductor |
