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SSTUB32866EC/G Datasheet(PDF) 1 Page - NXP Semiconductors |
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SSTUB32866EC/G Datasheet(HTML) 1 Page - NXP Semiconductors |
1 / 30 page 1. General description The SSTUB32866 is a 1.8 V configurable register specifically designed for use on DDR2 memory modules requiring a parity checking function. The register is configurable (using configuration pins C0 and C1) to two topologies: 25-bit 1 : 1 or 14-bit 1 : 2, and in the latter configuration can be designated as Register A or Register B on the DIMM. The SSTUB32866 accepts a parity bit from the memory controller on its parity bit (PAR_IN) input, compares it with the data received on the DIMM-independent D-inputs and indicates whether a parity error has occurred on its open-drain QERR pin (active LOW). The convention is even parity, that is, valid parity is defined as an even number of ones across the DIMM-independent data inputs combined with the parity input bit. The SSTUB32866 is packaged in a 96-ball, 6 × 16 grid, 0.8 mm ball pitch LFBGA package (13.5 mm × 5.5 mm). 2. Features and benefits Configurable register supporting DDR2 up to 800 MT/s Registered DIMM applications Configurable to 25-bit 1 : 1 mode or 14-bit 1 : 2 mode Controlled output impedance drivers enable optimal signal integrity and speed Meets or exceeds SSTUB32866 JEDEC standard speed performance Supports up to 450 MHz clock frequency of operation Optimized pinout for high-density DDR2 module design Chip-selects minimize power consumption by gating data outputs from changing state Supports SSTL_18 data inputs Checks parity on the DIMM-independent data inputs Partial parity output and input allows cascading of two SSTUB32866s for correct parity error processing Differential clock (CK and CK) inputs Supports LVCMOS switching levels on the control and RESET inputs Single 1.8 V supply operation (1.7 V to 2.0 V) Available in 96-ball, 13.5 mm × 5.5 mm, 0.8 mm ball pitch LFBGA package 3. Applications 400 MT/s to 800 MT/s DDR2 registered DIMMs desiring parity checking functionality SSTUB32866 1.8 V 25-bit 1 : 1 or 14-bit 1 : 2 configurable registered buffer with parity for DDR2-800 RDIMM applications Rev. 04 — 15 April 2010 Product data sheet |
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