27C256A-12 vs 27C512-20 对比
详细并排对比 27C256A-12 出自 NEC 和 27C512-20 出自 Fujitsu。对比关键规格、电气参数、封装、生命周期状态、价格和供货情况，以确定最适合您设计需求的元器件。
规格对比
| 参数 | 27C256A-12 | 27C512-20 |
|---|---|---|
| 品牌 | NEC | Fujitsu |
| 分类 | Memory ICs | Memory ICs |
| 生命周期状态 | Obsolete | Obsolete |
| 库存状态 | 有库存 | 有库存 |
| 单价（USD） | $2.52 | $4.10 |
| 存储器类型 | UV EPROM | UV EPROM |
| Technology | CMOS | CMOS |
| 存储容量 | 256 Kbit (32K x 8) | — |
| 存储组织 | 32K x 8 | 64K x 8 |
| Access Time | 120 ns | — |
| Supply Voltage (VCC) | 5 V | 5 V |
| Programming Voltage (VPP) | [DATA_NEEDED: programming voltage VPP] | [DATA_NEEDED: VPP voltage] |
| 接口 | Parallel | Parallel |
| 工作温度 | 0C to +70C (commercial) | [DATA_NEEDED: operating temperature range] |
| 封装 | 28-pin DIP | CQCC32 / LCC32 (ceramic, UV window) |
| 安装类型 | Through Hole | Surface Mount |
| Erase Method | Ultraviolet light | Ultraviolet light |
| Standby Current | [DATA_NEEDED: standby current] | [DATA_NEEDED: standby current] |
| Active Current | [DATA_NEEDED: active current] | — |
| RoHS 状态 | unknown | — |
| 生命周期状态 | Obsolete (legacy product) | — |
| Density | — | 512 Kbit (524,288 bits) |
| Maximum Access Time | — | 200 ns |
| Outputs | — | 3-state |
| Operation | — | Asynchronous |
| Word Size | — | 8 bit |
| Address Count | — | 65,536 words |