MoBL asynchronous SRAM for industrial and automotive-grade memory subsystems
The Cypress CY62137FV30LL-55ZSXE is a 2Mbit asynchronous SRAM from the MoBL (More Battery Life) series, organized as 128K x 16 bits. The 55 ns access time and 55 ns write-cycle time define the bus timing budget for the host controller.
55 ns access time — bus timing and cycle budget
The 55 ns access time sets the read-cycle window for the memory controller. In a system with a 20 MHz bus clock (50 ns period), this part leaves minimal margin for address-to-data setup; a faster 10 ns SRAM would be needed for zero-wait-state operation above ~18 MHz. For designs currently using a 55 ns asynchronous SRAM, this part is a direct drop-in replacement.
Temperature range and supply — fit for harsh environments
The 2.2V to 3.6V supply range covers both 3.3V and 2.5V rails without an external regulator, simplifying BOM integration.
Package and footprint — 44-TSOP II
Housed in a 44-TSOP II (0.400" body width, 10.16 mm), surface-mount package. The TSOP II footprint is a common industry standard for 16-bit asynchronous SRAMs in this density class.