EDB8164B4PR-1DITF-R datasheet(118/152 Pages) MICRON

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Figure 76: Single-Ended Output Slew Rate Definition

OH(AC)

REF

OL(AC)

Time

ΔTF

ΔTR

Table 79: Single-Ended Output Slew Rate

Notes 1–5 apply to all parameters conditions

Parameter

Symbol

Value

Unit

Min

Max

Single-ended output slew rate (output impedance = 40

Ω 

SRQSE

1.5

3.5

V/ns

Single-ended output slew rate (output impedance = 60

Ω 

SRQSE

1.0

2.5

V/ns

Output slew-rate-matching ratio (pull-up to pull-down)

0.7

1.4

–

Notes:

1. Definitions: SR = slew rate; Q = output (similar to DQ = data-in, data-out); SE = single-

ended signals.

2. Measured with output reference load.

3. The ratio of pull-up to pull-down slew rate is specified for the same temperature and

voltage over the entire temperature and voltage range. For a given output, the ratio

represents the maximum difference between pull-up and pull-down drivers due to proc-

ess variation.

4. The output slew rate for falling and rising edges is defined and measured between

VOL(AC) and VOH(AC).

5. Slew rates are measured under typical simultaneous switching output (SSO) conditions,

with one-half of DQ signals per data byte driving HIGH and one-half of DQ signals per

data byte driving LOW.

Differential Output Slew Rate

With the reference load for timing measurements, the output slew rate for falling and

rising edges is defined and measured between VOL,diff(AC) and VOH,diff(AC) for differential

signals.

216-Ball and 220-Ball, Dual-Channel LPDDR2 SDRAM

Output Characteristics and Operating Conditions

09005aef85eb530a

216b_220b_2ch_2e0e_embedded_lpddr2.pdf – Rev. F 08 /16 EN

118

Micron Technology, Inc. reserves the right to change products or specifications without notice.

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