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Differential Output Slew Rate
With the reference load for timing measurements, output slew rate for falling and rising edges is defined
and measured between VOLdiff (AC) and VOHdiff (AC) for differential signals as shown in table and figure
below.
Differential Output Slew Rate Definition
Measured
Description
Defined by
From
To
Differential output slew rate for rising edge
VOLdiff (AC)
VOHdiff (AC)
[VOHdiff (AC)-VOLdiff (AC)] / DeltaTRdiff
Differential output slew rate for falling edge
VOHdiff (AC)
VOLdiff (AC)
[VOHdiff (AC)-VOLdiff (AC)] / DeltaTFdiff
Notes:
1. Output slew rate is verified by design and characterization, and may not be subject to production test.
Differential Output Voltage(i.e. DQS-DQS)
Delta
TRdiff
VOHdiff(AC)
O
VOLdiff(AC)
Delta
TFdiff
Differential Output slew Rate Definition
Differential Output Slew Rate
DDR3-800
Parameter
Symbol Min
Max
DDR3-1066 DDR3-1333 DDR3-1600 DDR3-1866
Min
Max
Min
Differential Output Slew Rate SRQdiff
5
10
5
10
5
Description: SR; Slew Rate
Q: Query Output (like in DQ, which stands for Data-in, Query-Output)
se: Single-ended Signals
For Ron = RZQ/7 setting
Rev. 1.0 / Jun. 2013
Max
Min
Max
Min
Max
10
5
10
5
12
Units
V/ns
38