TMS4257-12SDL
Nibble Mode DRAM, 256KX1, 120ns, NMOS, PZIP16Manufacturer: Texas Instruments
Categories: DRAMs
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Texas Instruments TMS4257 series NMOS DRAM, part number TMS4257-12SDL, offers a 256K x 1 memory organization with a 120ns maximum access time. This component features Nibble Mode operation, enhancing data throughput by allowing four bits to be accessed with a single row address strobe (RAS) and column address strobe (CAS) pair. Supported refresh modes include RAS-only, CAS-before-RAS, and hidden refresh cycles, providing flexibility in system design. The TMS4257-12SDL operates with a supply voltage range of 4.5V to 5.5V and is housed in a 16-terminal PZIP package with through-hole mounting. This device is suitable for applications requiring high-density, asynchronous memory, commonly found in industrial control and data acquisition systems.
Additional Information
Series: TMS4257RoHS Status: Manufacturer Lead Time: Product Status: DiscontinuedPackaging: Datasheet:Download Free CAD Model:
Technical Details:
| Length | 20.5000 |
| Width | 2.8000 |
| Technology | NMOS |
| Access_Mode | NIBBLE |
| Access_Time_Max | 120.0000000000000000 |
| Additional_Feature | RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH |
| JESD_30_Code | R-PZIP-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 | ZIP |
| Package_Shape | Rectangular |
| Package_Style | IN-LINE |
| Refresh_Cycles | 256 |
| Seated_Height_Max | 8.2600 |
| 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 | ZIG-ZAG |
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