N25S818HA 256 kb Low Power Serial SRAMs 32 k x 8 Bit Organization Introduction The ON Semiconductor serial SRAM family includes several N25S818HA 1 1 CS VCC VCC CS SO HOLD SO HOLD SCK NC NC SCK VSS SI VSS SI TSSOP8 SOIC8 Figure 1. Pin Connections (Top View) Table 1. DEVICE OPTIONS Power Speed Typical Standby Read/Write Supply (V) (MHz) Current Operating Current Part Number Density Package N25S818HAS2 SOIC 256 Kb 1.8 16 200 nA 3 mA 1 Mhz N25S818HAT2 TSSOP Table 2. PIN NAMES Pin Name Pin Function CS Chip Select Input SCK Serial Clock Input SI Serial Data Input SO Serial Data Output HOLD Hold Input NC No Connect V Power CC V Ground SS SCK Clock Circuitry HOLD CS Decode Logic SRAM SI Array Data In Receiver Data Out SO Buffer Figure 2. Functional Block Diagram