Datasheet

DTM65521C
2 GB, 240-Pin DDR2 FB-DIMM
Document 06025, Revision A, 29-Sep-10, Dataram Corporation © 2010 Page 9
Advanced Memory Buffer FBD Timing/Electrical
Parameter Symbol MIN MAX Units
EI Assertion Pass-Through Timing
tEI PROPAGATE
4 CLKs
EI Deassertion Pass-Through Timing
tEID
tBitlock CLKs
EI Assertion Duration
tEI
100 CLKs
Bit Lock Interval
tBITLOCK
119 Frames
Frame Lock Interval
tFRAMELOCK
154 Frames
Advanced Memory Buffer Latency Parameters
Parameter Symbol MIN MAX Units Notes
CMD2DATA = 0x40 (Data Rate = 667)
tC2D_AMB
16.2 19 ns
CMD2DATA = 0x46 (Data Rate = 667)
tC2D_AMB
17.7 20.5 ns
Resample Delay (6)
tRESAMPLE
0.9 1.4 ns 1
Resync Delay (7,8,9)
tRESYNC
2 3.2 ns 2
NOTES:
1. tRESAMPLE is the delay from the southbound input to the southbound output, or the northbound input to the northbound output
when in resample mode, measured from the center of the data eye.
2. tRESYNC is the delay from the southbound input to the southbound output, or the northbound input to the northbound output
when in resync mode, measured from the center of the data eye.