TMS4257-15NL
Nibble Mode DRAM, 256KX1, 150ns, NMOS, PDIP16Manufacturer: Texas Instruments
Categories: DRAMs
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Texas Instruments TMS4257-15NL is a 256K x 1-bit Nibble Mode Dynamic Random Access Memory (DRAM) featuring a 150ns access time. This NMOS technology component operates asynchronously with a supply voltage range of 4.5V to 5.5V, typically 5V. The TMS4257 series offers NIBBLE access mode for enhanced data transfer efficiency, alongside RAS ONLY, CAS BEFORE RAS, and HIDDEN REFRESH capabilities. It utilizes separate I/O and provides 3-state output characteristics. Housed in a 16-lead Plastic Dual In-line Package (PDIP), this through-hole component is suitable for applications in industrial control, consumer electronics, and telecommunications infrastructure where reliable memory solutions are critical. The component supports 256 refresh cycles.
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 | 150.0000000000000000 |
| 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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