型号
- 型号
- 关键词
Nibble Mode DRAM, 256KX1, 150ns, NMOS, PDIP16, 0.300 INCH, PLASTIC, DIP-16
厂商名称：NEC(日电)
下载文档| 型号 | UPD41257C-15 | UPD41257L-20 | UPD41257L-12 | UPD41257L-15 |
|---|---|---|---|---|
| 描述 | Nibble Mode DRAM, 256KX1, 150ns, NMOS, PDIP16, 0.300 INCH, PLASTIC, DIP-16 | Nibble Mode DRAM, 256KX1, 200ns, NMOS, PQCC18, PLASTIC, LCC-18 | Nibble Mode DRAM, 256KX1, 120ns, NMOS, PQCC18, PLASTIC, LCC-18 | Nibble Mode DRAM, 256KX1, 150ns, NMOS, PQCC18, PLASTIC, LCC-18 |
| 包装说明 | 0.300 INCH, PLASTIC, DIP-16 | PLASTIC, LCC-18 | PLASTIC, LCC-18 | PLASTIC, LCC-18 |
| Reach Compliance Code | unknown | unknown | unknown | unknown |
| 访问模式 | NIBBLE | NIBBLE | NIBBLE | NIBBLE |
| 最长访问时间 | 150 ns | 200 ns | 120 ns | 150 ns |
| 其他特性 | RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH | RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH | RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH | RAS ONLY/CAS BEFORE RAS/HIDDEN REFRESH |
| JESD-30 代码 | R-PDIP-T16 | R-PQCC-J18 | R-PQCC-J18 | R-PQCC-J18 |
| 内存密度 | 262144 bit | 262144 bit | 262144 bit | 262144 bit |
| 内存集成电路类型 | NIBBLE MODE DRAM | NIBBLE MODE DRAM | NIBBLE MODE DRAM | NIBBLE MODE DRAM |
| 内存宽度 | 1 | 1 | 1 | 1 |
| 功能数量 | 1 | 1 | 1 | 1 |
| 端口数量 | 1 | 1 | 1 | 1 |
| 端子数量 | 16 | 18 | 18 | 18 |
| 字数 | 262144 words | 262144 words | 262144 words | 262144 words |
| 字数代码 | 256000 | 256000 | 256000 | 256000 |
| 工作模式 | ASYNCHRONOUS | ASYNCHRONOUS | ASYNCHRONOUS | ASYNCHRONOUS |
| 最高工作温度 | 70 °C | 70 °C | 70 °C | 70 °C |
| 组织 | 256KX1 | 256KX1 | 256KX1 | 256KX1 |
| 输出特性 | 3-STATE | 3-STATE | 3-STATE | 3-STATE |
| 封装主体材料 | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY |
| 封装代码 | DIP | QCCJ | QCCJ | QCCJ |
| 封装形状 | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR |
| 封装形式 | IN-LINE | CHIP CARRIER | CHIP CARRIER | CHIP CARRIER |
| 认证状态 | Not Qualified | Not Qualified | Not Qualified | Not Qualified |
| 刷新周期 | 256 | 256 | 256 | 256 |
| 座面最大高度 | 5.08 mm | 3.7 mm | 3.7 mm | 3.7 mm |
| 最大供电电压 (Vsup) | 5.5 V | 5.5 V | 5.5 V | 5.5 V |
| 最小供电电压 (Vsup) | 4.5 V | 4.5 V | 4.5 V | 4.5 V |
| 标称供电电压 (Vsup) | 5 V | 5 V | 5 V | 5 V |
| 表面贴装 | NO | YES | YES | YES |
| 技术 | NMOS | NMOS | NMOS | NMOS |
| 温度等级 | COMMERCIAL | COMMERCIAL | COMMERCIAL | COMMERCIAL |
| 端子形式 | THROUGH-HOLE | J BEND | J BEND | J BEND |
| 端子节距 | 2.54 mm | 1.27 mm | 1.27 mm | 1.27 mm |
| 端子位置 | DUAL | QUAD | QUAD | QUAD |
| 宽度 | 7.62 mm | 7.4 mm | 7.4 mm | 7.4 mm |
| 长度 | - | 12.5 mm | 12.5 mm | 12.5 mm |