DS3050W is a single-piece 4Mb nonvolatile SRAM memory module from Maxim Integrated, which integrates a real-time clock (RTC) and a rechargeable manganese lithium battery.
The DS3050W is a static RAM module featuring a nonvolatile controller, a year 2000-compliant real-time clock (RTC), and an internal rechargeable manganese lithium (ML) battery. Encased in a surface-mount module with a 256-ball BGA footprint, it recharges the battery from external power when Vcc is applied and protects memory contents when power fails or voltage is out of tolerance.
The document provides absolute maximum ratings, recommended operating conditions, DC and AC electrical characteristics, timing diagrams for read/write cycles, and typical operating curves. It also includes information on applications such as RAID systems, servers, and industrial controllers, along with reflow temperature profiles and cleaning procedures.
| Supply Voltage | 3.0V to 3.6V (Typ 3.3V) |
|---|---|
| Operating Temperature Range | -40°C to +85°C |
| Memory Capacity | 4Mb (512k x 8) |
| Package Type | 256-ball BGA Module |
| Read Cycle Time | 100 ns |
| Access Time | 100 ns |
The recommended operating supply voltage range is 3.0V to 3.6V with a typical value of 3.3V.
The module has a 27mm x 27mm BGA footprint.
The module charges the ML battery in approximately 96 hours of operation.