Unbuffered DIMM
datasheet
Rev. 1.0
DDR3L SDRAM
12.4 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 VOH- diff(AC) for differential signals as shown in below.
[ Table 14 ] Differential Output slew rate definition
Description | Measured |
| Defined by | ||
From | To |
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Differential output slew rate for rising edge | VOLdiff(AC) | VOHdiff(AC) |
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| Delta TRdiff |
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Differential output slew rate for falling edge | VOHdiff(AC) | VOLdiff(AC) |
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| Delta TFdiff |
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NOTE : Output slew rate is verified by design and characterization, and may not be subject to production test.
[ Table 15 ] Differential Output slew rate
Parameter | Symbol | Operation | Units | |||||||||
Voltage | Min | Max | Min | Max | Min | Max | Min | Max | ||||
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Single ended output slew rate | SRQdiff | 1.35V | 3.5 | 12 | 3.5 | 12 | 3.5 | 12 | 3.5 | 12 | V/ns | |
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1.5V | 5 | 10 | 5 | 10 | 5 | 10 | 5 | 10 | V/ns | |||
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Description : SR : Slew Rate
Q : Query Output (like in DQ, which stands for
diff : Differential Signals For Ron = RZQ/7 setting
VOHdiff(AC)
VTT
VOLdiff(AC)
delta TFdiff | delta TRdiff |
Figure 8. Differential output slew rate definition
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