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