What this 1Mbit asynchronous SRAM brings to the board
The Infineon CY62128BLL-70ZAE is a 1Mbit (128K x 8) asynchronous SRAM from the MoBL® series, built for parallel-bus designs that need a straightforward, no-clock memory interface. The 70 ns access time sets the bus-timing budget: a microcontroller or ASIC must sample the data within 70 ns of asserting the address.
70 ns access — timing margin in practice
The 70 ns access time and 70 ns write cycle time are the same figure, which simplifies the timing model: read and write cycles both take 70 ns minimum.
That means it can sit in a factory automation panel, a solar inverter, or a heavy-equipment ECU without derating.
Lifecycle and compliance reality
The RoHS compliance status is listed as non-compliant, which means the part uses tin-lead solder terminations. This is a constraint: it cannot be used in a standard lead-free reflow process without a waiver, and it is typically specified for legacy repair, military, or high-reliability assemblies where tin-lead is still accepted or required.