2 Mbit async SRAM in a 48-ball BGA — what the 70 ns access time means for bus timing
The Infineon CY62136CV30LL-70BVXI is a 2 Mbit asynchronous SRAM from the MoBL® (More Battery Life) series, organized as 128K words by 16 bits. It is a volatile, parallel-interface memory intended for applications where low standby power and a simple asynchronous bus matter more than burst throughput — think industrial control logic, telecom line cards, and portable instrumentation that need fast random access without the overhead of a clocked interface. The headline rating is the 70 ns access time. A 70 ns part pairs comfortably with 8- or 16-bit microcontrollers running at 10-20 MHz, or with a CPLD/FPGA state machine that needs a deterministic read cycle. It leaves enough margin for address decoding and bus transceiver propagation delays without forcing wait states on a 12.5 MHz bus. If your host controller runs faster than about 20 MHz, you will want to check whether the memory cycle time — also 70 ns for read and write — fits within the controller's external bus timing window.
The supply range of 2.7 V to 3.3 V covers both nominal 3.0 V and 3.3 V rails. On a 3.3 V system, the lower end gives headroom for a lightly loaded rail that droops under transient load; on a 3.0 V battery-backed design, the upper end is not a concern. The 128K x 16 organization means a single chip provides a 16-bit data word per address, which simplifies the bus on a 16-bit microcontroller or a 32-bit part running in 16-bit external bus mode.
48-VFBGA — what the package means for assembly and inspection
The 48-VFBGA (6x8 mm) is a fine-pitch ball-grid array. The package is moisture-sensitive; follow the MSL label on the reel for bake requirements before reflow.
Lifecycle and compliance — active status, ROHS3, and the MoBL series
It is ROHS3 compliant and lead-free per the entry. The MoBL series is Infineon's low-power asynchronous SRAM family, characterized by standby currents in the microamp range — a legacy from the original Cypress design that remains current for new builds.