K4B1G0446C Datasheet, PDF (22/63 Pages) Samsung semiconductor – 1Gb C-die DDR3 SDRAM Specification

K4B1G04(08/16)46C
1Gb DDR3 SDRAM
9.5 Reference Load for AC Timing and Output Slew Rate
Figure 9 represents the effective reference load of 25 ohms used in defining the relevant AC timing parameters of the device as well as output slew rate
measurements.
It is not intended as a precise representation of any particular system environment of a depiction of the actual load presented by a production tester. Sys-
tem designers should use IBIS or other simulation tools to correlate the timing reference load to a system environment. Manufacturers correlate to their
production test conditions, generally one or more coaxial transmission lines terminated at the tester electronics.
CK/CK
VDDQ
DUT
DQ
DQS
DQS
25Ω
V_TT = V_DDQ/2
Reference
Point
Figure 9. Reference Load for AC Timing and Output Slew Rate
Page 22 of 63
Rev. 1.0 June 2007