Keysight Technologies D9020DDRC, Manual

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4 Single-Ended Signals AC Input Parameters Tests
74 DDR2(+LP) Compliance Testing Methods of Implementation
V
IL(AC)
Test for Address, Control - Test Method of Implementation
V
IL(AC)
- Minimum AC Input Logic Low Address, Control.
The purpose of this test is to verify that the mode low level voltage value of the histogram for the test
signal is lower than the conformance maximum limits of the V
IL(AC)
value specified in the JEDEC
specification.
The value of V
REF
which directly affects the conformance lower limit is set to 0.9V. User may choose
to use the UDL (User Defined Limit) feature in the application to perform this test against a
customized test limit set based on the different values of V
REF
.
The value of V
PEAK
which directly affects the conformance upper limit is set to 0.5V. User may choose
to use the UDL (User Defined Limit) feature in the application to perform this test against a
customized test limit set based on the different values of V
PEAK
.
The value of V
DDQ
which directly affects the conformance upper limit is set to 1.8V. User may choose
to use the UDL (User Defined Limit) feature in the application to perform this test against a
customized test limit set based on the different values of V
DDQ
.
The value of V
SSQ
which directly affect the conformance upper limit is set to 0V. User may choose to
use the UDL (User Defined Limit) feature in the application to perform this test against a customize
test limit set based on different values of V
SSQ
.
Signals of Interest
Mode Supported: DDR2 only
Signal cycle of interest: WRITE
Required Read/Write separation: No
Signal(s) of Interest:
• Address Signal OR
• Control Signal OR
• Clock Signal
Signals required to perform the test on the oscilloscope:
• Pin Under Test, PUT - any signal of interest, as defined above
Test Definition Notes from the Specification
Table 43 Input AC Logic Level
Symbol Parameter DDR2-400, DDR2-533 DDR2-667, DDR2-800 Units Notes
Min Max Min Max
V
IL(AC)
AC input logic LOW V
SSQ
-V
PEAK
V
REF
- 0.250 V
SSQ
-V
PEAK
V
REF
- 0.200 V 1
Table 44 Input AC Logic Level (DDR2-1066)
Symbol Parameter DDR2-1066 Units Notes
Min Max
V
IL(AC)
AC input logic LOW - V
REF
- 0.200 V -