1GB-AUTO-AS4C128M8D3 Datasheet, PDF (57/84 Pages) Alliance Semiconductor Corporation – Fully synchronous operation

1Gb Auto-AS4C128M8D3
- Single Ended Output Slew Rate
With the reference load for timing measurements, output slew rate for falling and rising edges is defined and
measured between VOL(AC) and VOH(AC) for single ended signals as shown in Table.
Table 34. Output Slew Rate Definition (Single-ended)
Description
Measured
From
To
Defined by
Single-ended output slew rate for rising edge VOL(AC) VOH(AC)
[VOH(AC) - VOL(AC)] /
DeltaTRse
Single-ended output slew rate for falling edge VOH(AC) VOL(AC)
[VOH(AC) - VOL(AC)] /
DeltaTFse
NOTE: Output slew rate is verified by design and characterization, and may not be subject to production test.
Table 35. Output Slew Rate (Single-ended)
Symbol
Parameter
Min.
SRQse ^{Single-ended Output Slew Rate}
2.5
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
-12BAN
Max.
5
Unit
V/ns
- 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.
Table 36. Output Slew Rate Definition (Differential)
Description
Measured
From
To
Defined by
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.
Table37. Output Slew Rate (Differential)
Symbol
Parameter
Min.
SRQdiff ^{Differential Output Slew Rate}
5
Description:
SR: Slew Rate
Q: Query Output (like in DQ, which stands for Data-in, Query-Output)
diff: Differential Signals
For Ron = RZQ/7 setting
-12BAN
Max.
10
Unit
V/ns
l Reference Load for AC Timing and Output Slew Rate
The following figure represents the effective reference load of 25 ohms used in defining the relevant AC timing
parameters of the device as well as output slew rate measurements.
It is not intended as a precise representation of any particular system environment or a depiction of the actual load
Confidential
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Rev.1.0 May 2015