The Infineon CY62136VLL-55ZI is a 2 Mbit asynchronous SRAM from the MoBL® (More Battery Life) series, organized as 128K words by 16 bits. The 55 ns access time puts it in the mid-speed tier for asynchronous SRAM, fast enough to keep up with a 16-bit microcontroller or DSP without wait states at moderate clock rates.
No 5 V tolerance on the I/O — keep the supply inside the 3.6 V ceiling.
Housed in a 44-pin TSOP II (0.400" body width, 10.16 mm), this is a gull-wing leaded package that reworks cleanly with a hot-air station — no hidden pads, no underfill. Bulk shipping means the parts arrive in a tube or tray, not taped, so handle them with ESD tweezers.