Selection guide for non-volatile RAM products. Non-volatile RAMs Selection guide September 2007 www.st.com/nvram ZEROPOWER NVRAMs ■ Battery backed SRAM ■ 16 Mbit to 16 Kbit VCC Battery Package Density Part number Comments [V] check SNAPHAT DIP Other M48Z2M1Y 5.0 16 Mb (2 Mx8) 36 M48Z2M1V 3.3 4 Mb (512 Kx8) M48Z512AY 5.0 ……