Microchip SRAM, 23LCV04M-I/ST- 4Mbit

The Microchip 4-Mbit SRAM device provides memory access through a simple SPI-compatible serial bus. It uses a clock input (SCK), separate data in (SI), and data out (SO) lines, with access controlled by a Chip Select (CS) input. For faster data transfer, it also supports Serial Dual Interface (SDI) and Serial Quad Interface (SQI).

Zero write time
Unlimited read and write cycles
RoHS compliant
Halogen free