Standard SRAM, 256KX4, 35ns, CMOS, PDSO28
| Parameter Name | Attribute value |
| Is it Rohs certified? | incompatible |
| Maker | Paradigm Technology Inc |
| package instruction | SOJ, SOJ28,.34 |
| Reach Compliance Code | unknown |
| Maximum access time | 35 ns |
| I/O type | COMMON |
| JESD-30 code | R-PDSO-J28 |
| JESD-609 code | e0 |
| memory density | 1048576 bit |
| Memory IC Type | STANDARD SRAM |
| memory width | 4 |
| Number of terminals | 28 |
| word count | 262144 words |
| character code | 256000 |
| Operating mode | ASYNCHRONOUS |
| Maximum operating temperature | 70 °C |
| Minimum operating temperature | |
| organize | 256KX4 |
| Output characteristics | 3-STATE |
| Package body material | PLASTIC/EPOXY |
| encapsulated code | SOJ |
| Encapsulate equivalent code | SOJ28,.34 |
| Package shape | RECTANGULAR |
| Package form | SMALL OUTLINE |
| Parallel/Serial | PARALLEL |
| power supply | 5 V |
| Certification status | Not Qualified |
| Maximum standby current | 0.0005 A |
| Minimum standby current | 2 V |
| Maximum slew rate | 0.15 mA |
| Nominal supply voltage (Vsup) | 5 V |
| surface mount | YES |
| technology | CMOS |
| Temperature level | COMMERCIAL |
| Terminal surface | Tin/Lead (Sn/Pb) |
| Terminal form | J BEND |
| Terminal pitch | 1.27 mm |
| Terminal location | DUAL |
| Base Number Matches | 1 |

| PSM44028L35TSO | PSM44028L20TCM | PSM44028L45TCB | PSM44028L45TCM | PSM44028L20TCB | PSM44028L20TSO | PSM44028S25TCB | PSM44028S45TCB | PSM44028L25TC | |
|---|---|---|---|---|---|---|---|---|---|
| Description | Standard SRAM, 256KX4, 35ns, CMOS, PDSO28 | Standard SRAM, 256KX4, 20ns, CMOS, CDIP28 | Standard SRAM, 256KX4, 45ns, CMOS, CDIP28 | Standard SRAM, 256KX4, 45ns, CMOS, CDIP28 | Standard SRAM, 256KX4, 20ns, CMOS, CDIP28 | Standard SRAM, 256KX4, 20ns, CMOS, PDSO28 | Standard SRAM, 256KX4, 25ns, CMOS, CDIP28 | Standard SRAM, 256KX4, 45ns, CMOS, CDIP28 | Standard SRAM, 256KX4, 25ns, CMOS, CDIP28 |
| Is it Rohs certified? | incompatible | incompatible | incompatible | incompatible | incompatible | incompatible | incompatible | incompatible | incompatible |
| package instruction | SOJ, SOJ28,.34 | DIP, DIP28,.4 | DIP, DIP28,.4 | DIP, DIP28,.4 | DIP, DIP28,.4 | SOJ, SOJ28,.34 | DIP, DIP28,.4 | DIP, DIP28,.4 | DIP, DIP28,.4 |
| Reach Compliance Code | unknown | unknow | unknow | unknow | unknow | unknow | unknown | unknown | unknown |
| Maximum access time | 35 ns | 20 ns | 45 ns | 45 ns | 20 ns | 20 ns | 25 ns | 45 ns | 25 ns |
| I/O type | COMMON | COMMON | COMMON | COMMON | COMMON | COMMON | COMMON | COMMON | COMMON |
| JESD-30 code | R-PDSO-J28 | R-XDIP-T28 | R-XDIP-T28 | R-XDIP-T28 | R-XDIP-T28 | R-PDSO-J28 | R-XDIP-T28 | R-XDIP-T28 | R-XDIP-T28 |
| JESD-609 code | e0 | e0 | e0 | e0 | e0 | e0 | e0 | e0 | e0 |
| memory density | 1048576 bit | 1048576 bi | 1048576 bi | 1048576 bi | 1048576 bi | 1048576 bi | 1048576 bit | 1048576 bit | 1048576 bit |
| Memory IC Type | STANDARD SRAM | STANDARD SRAM | STANDARD SRAM | STANDARD SRAM | STANDARD SRAM | STANDARD SRAM | STANDARD SRAM | STANDARD SRAM | STANDARD SRAM |
| memory width | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Number of terminals | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| word count | 262144 words | 262144 words | 262144 words | 262144 words | 262144 words | 262144 words | 262144 words | 262144 words | 262144 words |
| character code | 256000 | 256000 | 256000 | 256000 | 256000 | 256000 | 256000 | 256000 | 256000 |
| Operating mode | ASYNCHRONOUS | ASYNCHRONOUS | ASYNCHRONOUS | ASYNCHRONOUS | ASYNCHRONOUS | ASYNCHRONOUS | ASYNCHRONOUS | ASYNCHRONOUS | ASYNCHRONOUS |
| Maximum operating temperature | 70 °C | 125 °C | 125 °C | 125 °C | 125 °C | 70 °C | 125 °C | 125 °C | 70 °C |
| Minimum operating temperature | - | -55 °C | -55 °C | -55 °C | -55 °C | - | -55 °C | -55 °C | - |
| organize | 256KX4 | 256KX4 | 256KX4 | 256KX4 | 256KX4 | 256KX4 | 256KX4 | 256KX4 | 256KX4 |
| Output characteristics | 3-STATE | 3-STATE | 3-STATE | 3-STATE | 3-STATE | 3-STATE | 3-STATE | 3-STATE | 3-STATE |
| Package body material | PLASTIC/EPOXY | CERAMIC | CERAMIC | CERAMIC | CERAMIC | PLASTIC/EPOXY | CERAMIC | CERAMIC | CERAMIC |
| encapsulated code | SOJ | DIP | DIP | DIP | DIP | SOJ | DIP | DIP | DIP |
| Encapsulate equivalent code | SOJ28,.34 | DIP28,.4 | DIP28,.4 | DIP28,.4 | DIP28,.4 | SOJ28,.34 | DIP28,.4 | DIP28,.4 | DIP28,.4 |
| Package shape | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR |
| Package form | SMALL OUTLINE | IN-LINE | IN-LINE | IN-LINE | IN-LINE | SMALL OUTLINE | IN-LINE | IN-LINE | IN-LINE |
| Parallel/Serial | PARALLEL | PARALLEL | PARALLEL | PARALLEL | PARALLEL | PARALLEL | PARALLEL | PARALLEL | PARALLEL |
| power supply | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Certification status | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified |
| Maximum standby current | 0.0005 A | 0.0005 A | 0.0005 A | 0.0005 A | 0.0005 A | 0.0005 A | 0.01 A | 0.01 A | 0.0005 A |
| Minimum standby current | 2 V | 2 V | 2 V | 2 V | 2 V | 2 V | 4.5 V | 4.5 V | 2 V |
| Maximum slew rate | 0.15 mA | 0.18 mA | 0.16 mA | 0.16 mA | 0.18 mA | 0.17 mA | 0.17 mA | 0.16 mA | 0.16 mA |
| Nominal supply voltage (Vsup) | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| surface mount | YES | NO | NO | NO | NO | YES | NO | NO | NO |
| technology | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS |
| Temperature level | COMMERCIAL | MILITARY | MILITARY | MILITARY | MILITARY | COMMERCIAL | MILITARY | MILITARY | COMMERCIAL |
| Terminal surface | Tin/Lead (Sn/Pb) | Tin/Lead (Sn/Pb) | Tin/Lead (Sn/Pb) | Tin/Lead (Sn/Pb) | Tin/Lead (Sn/Pb) | Tin/Lead (Sn/Pb) | Tin/Lead (Sn/Pb) | Tin/Lead (Sn/Pb) | Tin/Lead (Sn/Pb) |
| Terminal form | J BEND | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE | J BEND | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE |
| Terminal pitch | 1.27 mm | 2.54 mm | 2.54 mm | 2.54 mm | 2.54 mm | 1.27 mm | 2.54 mm | 2.54 mm | 2.54 mm |
| Terminal location | DUAL | DUAL | DUAL | DUAL | DUAL | DUAL | DUAL | DUAL | DUAL |
| Maker | Paradigm Technology Inc | Paradigm Technology Inc | Paradigm Technology Inc | Paradigm Technology Inc | Paradigm Technology Inc | Paradigm Technology Inc | - | - | - |
| ECCN code | - | - | - | - | 3A001.A.2.C | 3A991.B.2.B | 3A001.A.2.C | 3A001.A.2.C | EAR99 |