W97AH6KB datasheet(90/127 Pages) WINBOND

90 / 127 page

W97AH6KB / W97AH2KB

Publication Release Date: May 15, 2014

Revision: A01-001

- 90 -

8.2.5.4

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 VOHdiff(AC) for differential signals as shown in below table and figure.

Table of Differential Output Slew Rate Definition

Description

Measured

Defined by

from

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

Note: Output slew rate is verified by design and characterization, and may not be subject to production test.

Delta TFdiff

Delta TRdiff

VOLdiff(AC)

VOHdiff(AC)

Figure of Differential Output Slew Rate Definition

Table of Differential Output Slew Rate

Symbol

Parameter

LPDDR2-800/1066

Units

Min

Max

SRQdiff

Differential Output Slew Rate (RON = 40

Ω ± 30%)

3.0

7.0

V/nS

SRQdiff

Differential Output Slew Rate (RON = 60

Ω ± 30%)

2.0

5.0

V/nS

Description:

SR: Slew Rate

Q: Query Output (like in DQ, which stands for Data-in, Query-Output)

diff: differential Signals

Notes:

1. Measured with output reference load.

2. The output slew rate for falling and rising edges is defined and measured between VOLdiff(AC) and VOHdiff(AC).

3. Slew rates are measured under normal SSO conditions, with 1/2 of DQ signals per data byte driving logic-high and 1/2 of DQ signals per data

byte driving logic-low.

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