27C256A-12 vs 27C256A-20 对比
详细并排对比 27C256A-12 出自 NEC 和 27C256A-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 | 27C256A-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 | $8.20 |
| 存储器类型 | UV EPROM | OTP EPROM (CMOS) |
| Technology | CMOS | CMOS |
| 存储容量 | 256 Kbit (32K x 8) | 256 Kbit |
| 存储组织 | 32K x 8 | 32K x 8 (32768 bytes) |
| Access Time | 120 ns | — |
| 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 DIP / PLCC (per ordering code) |
| 安装类型 | Through Hole | Through Hole (DIP variant) |
| Erase Method | Ultraviolet light | — |
| Standby Current | [DATA_NEEDED: standby current] | — |
| Active Current | [DATA_NEEDED: active current] | — |
| RoHS 状态 | unknown | [DATA_NEEDED: RoHS status] |
| 生命周期状态 | Obsolete (legacy product) | — |
| Maximum Access Time | — | 200 ns (-20 speed grade) |
| 电源电压 | — | 5 V single supply |
| Address Lines | — | A0 to A14 (15 lines) |
| Data Lines | — | O0 to O7 (8-bit, tri-state) |
| Control Signals | — | CE, OE, PGM |
| Standby Mode | — | Static standby (low-power deselect) |
| Programming Method | — | Fast single address location programming |
| Output Compatibility | — | TTL-compatible |
| Erasability | — | One-Time Programmable (no window) |