| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | DM74LS125A |  122Kb/6P | Quad TRI-STATE Buffers |
 National Semiconductor ... | DM74LS122 |  129Kb/6P | DM74LS122 Retriggerable One-Shot with Clear and Complementary Outputs |
 National Semiconductor ... | DM74LS123 |  135Kb/6P | Dual Retriggerable One-Shot with Clear and Complementary Outputs |
 National Semiconductor ... | DM74LS123M |  135Kb/6P | Dual Retriggerable One-Shot with Clear and Complementary Outputs |
 National Semiconductor ... | DM74LS123N |  135Kb/6P | Dual Retriggerable One-Shot with Clear and Complementary Outputs |