Package Information
| Lead Count (#) | 256 |
| Pkg. Code | BC256 |
| Pitch (mm) | 1 |
| Pkg. Type | CABGA |
| Pkg. Dimensions (mm) | 17.0 x 17.0 x 1.4 |
Environmental & Export Classifications
| Pb (Lead) Free | No |
| Moisture Sensitivity Level (MSL) | 4 |
| ECCN (US) | NLR |
| HTS (US) | 8542320041 |
Product Attributes
| Lead Count (#) | 256 |
| Pb (Lead) Free | No |
| Carrier Type | Tray |
| Moisture Sensitivity Level (MSL) | 4 |
| Access Time (ns) | 15 |
| Architecture | Dual-Port |
| Bus Width (bits) | 18 |
| Core Voltage (V) | 3.3 |
| Density (Kb) | 2304 |
| Function | Busy, Interrupt, JTAG, Master, Slave |
| I/O Type | 3.3 V LVTTL |
| Interface | Async |
| Length (mm) | 17 |
| MOQ | 24 |
| Organization | 128K x 18 |
| Package Area (mm²) | 289.0 |
| Pb Free Category | e0 |
| Pitch (mm) | 1 |
| Pkg. Dimensions (mm) | 17.0 x 17.0 x 1.4 |
| Pkg. Type | CABGA |
| Qty. per Carrier (#) | 90 |
| Qty. per Reel (#) | 0 |
| Requires Terms and Conditions | Does not require acceptance of Terms and Conditions |
| Tape & Reel | No |
| Temp. Range | 0 to 70°C |
| Thickness (mm) | 1.4 |
| Width (mm) | 17 |
Description
The 70V639 is a high-speed 128K x 18 asynchronous dual-port static RAM designed to be used as a stand-alone dual-port RAM or as a combination Master/Slave dual-port RAM for 36-bit or more word systems. Using the Master/Slave dual-port RAM approach in 36-bit or wider memory system applications results in full-speed, error-free operation without the need for additional discrete logic. An automatic power-down feature controlled by the chip enables (either CE0 or CE1) permits the on-chip circuitry of each port to enter a very low standby power mode.