Ddr2 Configurable Registered Buffer

The SLGSSTU32864 is a configurable registered Buffer designed for 1.7V to 1.9V VDD operating range. When C1 input pin is low, the SLGSSTU32864 is 1:1 25-bit configuration. When C1 input pin is high, the SLGSSTU32864 is 1:2 14-bit configuration. Additionally, C0 input pin controls the 1:2 pinout as register-A configuration (if low) , and register-B configuration (if high). The C0,C1, and RESET pins are LVCMOS input levels.The C0,C1 input pins are not intended to be switched dynamically during normal operation. They should be tied to Logic high or low levels to configure the Register Data propagation from D to Q is controlled by the differential Clock (CLK/CLK) and a control signals. The rising edge of CLK (crossing with CLK falling) is used to Register the Data. All inputs are SSTL_18 except C0,C1, and RESET pins. The SLGSSTU32864 supports low-power standby operation. Setting RESET pin to a Logic low disables (CLK/CLK) receivers, and allows floating inputs to all other receivers as well (D, VREF , CLK/CLK). Addi- tionally, all internal Registers are reset, and outputs (Q) are set low. RESET input pin must always be driven to a valid Logic state high or low. RESET, an LVCMOS asynchronous signal, is also intended for use at the time of power-up. RESET must be held at a Logic low level during power up. This ensures defined outputs before a stable CLK/CLK is supplied. The SLGSSTU32864 supports low-power active operation as it monitors DCS and CSR inputs. The Qn outputs will be prevented from changing states when both DCS and CSR inputs are high. The Qn outputs will be allowed to change state if either one of DCS or CSR inputs is low. If DCS control is not desired, then CSR input should be held low. In that case, the setup and hold times of DCS is the same as the other D inputs. By Unkown
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