27C256A-12 vs 27C256L-20R Comparison
Detailed side-by-side comparison of 27C256A-12 by NEC and 27C256L-20R by WaferScale Integration. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
Specification Comparison
| Parameter | 27C256A-12 | 27C256L-20R |
|---|---|---|
| Brand | NEC | WaferScale Integration |
| Category | Memory ICs | EEPROM |
| Lifecycle Status | Obsolete | Obsolete |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $2.52 | $1.85 |
| Memory Type | UV EPROM | CMOS EPROM (UV erasable) |
| Technology | CMOS | — |
| Memory Size | 256 Kbit (32K x 8) | 256 Kilobit |
| Organization | 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] | — |
| Interface | Parallel | — |
| Operating Temperature | 0C to +70C (commercial) | [DATA_NEEDED: operating temperature range] |
| Package | 28-pin DIP | 28-pin package (per JEDEC EPROM pinout) |
| Mounting Type | 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 Status | unknown | [DATA_NEEDED: RoHS compliance] |
| Lifecycle Status | Obsolete (legacy product) | — |
| Supply Voltage | — | 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 |