TMS4257-12NL
Nibble Mode DRAM, 256KX1, 120ns, NMOS, PDIP16Manufacturer: Texas Instruments
Categories: DRAMs
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Texas Instruments TMS4257 Series NMOS DRAM, part number TMS4257-12NL, offers a 256K x 1 memory organization with a maximum access time of 120ns. This component features Nibble Mode operation, enhancing data transfer efficiency. It supports various refresh modes including RAS ONLY, CAS BEFORE RAS, and HIDDEN REFRESH, with 256 refresh cycles. The TMS4257-12NL is housed in a 16-lead PDIP package with through-hole termination and a terminal pitch of 2.54mm. Designed for asynchronous operation, it requires a supply voltage range of 4.5V to 5.5V. This device is suitable for applications in industrial automation and consumer electronics.
Additional Information
Series: TMS4257RoHS Status: Manufacturer Lead Time: Product Status: DiscontinuedPackaging: Datasheet:Download Free CAD Model:
Technical Details:
| Width | 7.6200 |
| Technology | NMOS |
| Length | 19.3050 |
| Access_Mode | NIBBLE |
| Access_Time_Max | 120.0000000000000000 |
| Additional_Feature | RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH |
| I_O_Type | SEPARATE |
| JESD_30_Code | R-PDIP-T16 |
| Memory_Density | 262144.0000000000000000 |
| Memory_IC_Type | NIBBLE MODE DRAM |
| Memory_Organization | 256KX1 |
| Memory_Width | 1 |
| Number_of_Functions | 1 |
| Number_of_Ports | 1 |
| Number_of_Terminals | 16 |
| Number_of_Words | 262144.0000000000000000 |
| Number_of_Words_Code | 256k |
| Operating_Mode | Asynchronous |
| Operating_Temperature_Max | 70.0 |
| Operating_Temperature_Min | 0.0 |
| Output_Characteristics | 3-State |
| Package_Body_Material | PLASTIC/EPOXY |
| Package_Code | DIP |
| Package_Equivalence_Code | DIP16,.3 |
| Package_Shape | Rectangular |
| Package_Style | IN-LINE |
| Refresh_Cycles | 256 |
| Seated_Height_Max | 5.0800 |
| Supply_Voltage_Max | 5.50000 |
| Supply_Voltage_Min | 4.50000 |
| Supply_Voltage_Nom | 5 |
| Surface_Mount | No |
| Terminal_Form | THROUGH-HOLE |
| Terminal_Pitch | 2.540 |
| Terminal_Position | Dual |
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