MASK ROM, 512KX8, 250ns, CMOS, PQFP64, PLASTIC, QFP-64
| Parameter Name | Attribute value |
| Maker | NEC Electronics |
| package instruction | PLASTIC, QFP-64 |
| Reach Compliance Code | unknown |
| Maximum access time | 250 ns |
| Spare memory width | 16 |
| JESD-30 code | R-PQFP-G64 |
| length | 20 mm |
| memory density | 4194304 bit |
| Memory IC Type | MASK ROM |
| memory width | 8 |
| Number of functions | 1 |
| Number of terminals | 64 |
| word count | 524288 words |
| character code | 512000 |
| Operating mode | ASYNCHRONOUS |
| Maximum operating temperature | 70 °C |
| Minimum operating temperature | -10 °C |
| organize | 512KX8 |
| Output characteristics | 3-STATE |
| Package body material | PLASTIC/EPOXY |
| encapsulated code | QFP |
| Package shape | RECTANGULAR |
| Package form | FLATPACK |
| Parallel/Serial | PARALLEL |
| Certification status | Not Qualified |
| Maximum seat height | 3 mm |
| Maximum supply voltage (Vsup) | 5.5 V |
| Minimum supply voltage (Vsup) | 4.5 V |
| Nominal supply voltage (Vsup) | 5 V |
| surface mount | YES |
| technology | CMOS |
| Temperature level | COMMERCIAL |
| Terminal form | GULL WING |
| Terminal pitch | 1 mm |
| Terminal location | QUAD |
| width | 14 mm |




| UPD23C4000GF | |
|---|---|
| Description | MASK ROM, 512KX8, 250ns, CMOS, PQFP64, PLASTIC, QFP-64 |
| Maker | NEC Electronics |
| package instruction | PLASTIC, QFP-64 |
| Reach Compliance Code | unknown |
| Maximum access time | 250 ns |
| Spare memory width | 16 |
| JESD-30 code | R-PQFP-G64 |
| length | 20 mm |
| memory density | 4194304 bit |
| Memory IC Type | MASK ROM |
| memory width | 8 |
| Number of functions | 1 |
| Number of terminals | 64 |
| word count | 524288 words |
| character code | 512000 |
| Operating mode | ASYNCHRONOUS |
| Maximum operating temperature | 70 °C |
| Minimum operating temperature | -10 °C |
| organize | 512KX8 |
| Output characteristics | 3-STATE |
| Package body material | PLASTIC/EPOXY |
| encapsulated code | QFP |
| Package shape | RECTANGULAR |
| Package form | FLATPACK |
| Parallel/Serial | PARALLEL |
| Certification status | Not Qualified |
| Maximum seat height | 3 mm |
| Maximum supply voltage (Vsup) | 5.5 V |
| Minimum supply voltage (Vsup) | 4.5 V |
| Nominal supply voltage (Vsup) | 5 V |
| surface mount | YES |
| technology | CMOS |
| Temperature level | COMMERCIAL |
| Terminal form | GULL WING |
| Terminal pitch | 1 mm |
| Terminal location | QUAD |
| width | 14 mm |