4 Mbit byte-wide SRAM for industrial bus applications
The Infineon CY62148GN-45ZSXI is a 4 Mbit asynchronous SRAM organized as 512K x 8 bits, accessed through a parallel interface with a 45 ns access time. It belongs to the MoBL (Maximum Battery Life) series, optimized for low standby power in battery-backed or power-sensitive designs.
45 ns access time and 5 V supply compatibility
The 45 ns access time sets the minimum read/write cycle time — at this speed the part keeps pace with legacy 8-bit microcontrollers and CPLD memory controllers running bus clocks up to roughly 22 MHz before wait states are needed. Write cycle time is also 45 ns for both word and page modes, meaning the bus timing is symmetric — no extra dead cycles on writes versus reads.
Package options and board integration
Available in a 32-SOIC (0.400-inch body width, 10.16 mm) and a 32-TSOP II footprint — the TSOP II is the thinner profile option for space-constrained boards, while the SOIC gives a wider solder joint for manual inspection. Surface-mount mounting with a parallel interface means it routes directly to a standard 8-bit data bus and 19-bit address bus; no serial-to-parallel conversion logic required.
Active lifecycle and compliance posture
ROHS3 compliant, so it meets the latest EU restriction-of-hazardous-substances directive without exemption issues for new product registrations.