27C256L-20R vs 27C256A-12 对比
详细并排对比 27C256L-20R 出自 WaferScale Integration 和 27C256A-12 出自 NEC。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 | 27C256L-20R | 27C256A-12 |
|---|---|---|
| 品牌 | WaferScale Integration | NEC |
| 分类 | EEPROM | Memory ICs |
| 生命周期状态 | Obsolete | Obsolete |
| 库存状态 | 有库存 | 有库存 |
| 单价（USD） | $1.85 | $2.52 |
| 存储容量 | 256 Kilobit | 256 Kbit (32K x 8) |
| 存储组织 | 32K x 8-bit | 32K x 8 |
| 存储器类型 | CMOS EPROM (UV erasable) | UV EPROM |
| Access Time | 200 ns (-20 speed grade) | 120 ns |
| 电源电压 | Single +5 V with +/-10% tolerance | — |
| Standby Current | 20 uA typical (CMOS standby) | [DATA_NEEDED: standby current] |
| Active Current | [DATA_NEEDED: active supply current] | [DATA_NEEDED: active current] |
| Programming Scheme | 100% Flashrite programming | — |
| Pinout | JEDEC-approved 28-pin pinout | — |
| Address Lines | A0 to A14 (15 lines) | — |
| Data Lines | O0 to O7 (8 lines) | — |
| Control Signals | CE, OE, PGM/VPP | — |
| 工作温度 | [DATA_NEEDED: operating temperature range] | 0C to +70C (commercial) |
| 封装 | 28-pin package (per JEDEC EPROM pinout) | 28-pin DIP |
| 安装类型 | Through-Hole | Through Hole |
| RoHS 状态 | [DATA_NEEDED: RoHS compliance] | unknown |
| Erase Method | Ultraviolet light (UV EPROM) | Ultraviolet light |
| Technology | — | CMOS |
| Supply Voltage (VCC) | — | 5 V |
| Programming Voltage (VPP) | — | [DATA_NEEDED: programming voltage VPP] |
| 接口 | — | Parallel |
| 生命周期状态 | — | Obsolete (legacy product) |