Hynix HMT42GR7BFR4C-RDT8 User Manual

When the Reference load for timing measurements, output slew rate for falling and rising edges is defined 
and measured between V

OL(AC)

 and V

OH(AC)

 for single ended signals are shown in table and figure below.

1. Output slew rate is verified by design and characterisation, and may not be subject to production test.

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
Note 1): In two cases, a maximum slew rate of 6V/ns applies for a single DQ signal within a byte lane.
Case 1 is a defined for a single DQ signal within a byte lane which is switching into a certain direction (either from high 
to low or low to high) while all remaining DQ signals in the same byte lane are static (i.e. they stay at either high or low).
Case 2 is a defined for a single DQ signal within a byte lane which is switching into a certain direction (either from high 
to low or low to high) while all remaining DQ signals in the same byte lane switching into the opposite direction (i.e. from 
low to high of high to low respectively). For the remaining DQ signal switching in to the opposite direction, the regular 
maximum limite of 5 V/ns applies.

Single-ended output slew rate for rising edge

V

OL(AC)

V

OH(AC)

[V

OH(AC)

-V

OL(AC)

] / DeltaTRse

Single-ended output slew rate for falling edge

V

OH(AC)

V

OL(AC)

[V

OH(AC)

-V

OL(AC)

] / DeltaTFse

Single-ended Output Slew Rate

SRQse

2.5

5

2.5

5

2.5

5

2.5

5

2.5

5

1)

V/ns

Delta TFse

Delta TRse

V

OH(AC)

V

Ol(AC)

V

∏

Si

ngl

e 

En

de

d Out

put

 Vo

lta

ge

(l

.e

.DQ)