1Gb: x8, x16 Automotive DDR2 SDRAM - Micron
1Gb: x8, x16 Automotive DDR2 SDRAM - Micron
1Gb: x8, x16 Automotive DDR2 SDRAM - Micron
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AC Overshoot/Undershoot Specification<br />
Table 25: Address and Control Balls<br />
Some revisions will support the 0.9V maximum average amplitude instead of the 0.5V<br />
maximum average amplitude shown in Table 25 and Table 26.<br />
Applies to address balls, bank address balls, CS#, RAS#, CAS#, WE#, CKE, and ODT<br />
Parameter<br />
-187E -25/-25E<br />
Specification<br />
-3/-3E -37E -5E<br />
Maximum peak amplitude allowed for overshoot area<br />
(see Figure 19)<br />
0.50V 0.50V 0.50V 0.50V 0.50V<br />
Maximum peak amplitude allowed for undershoot area<br />
(see Figure 20)<br />
0.50V 0.50V 0.50V 0.50V 0.50V<br />
Maximum overshoot area above VDD (see Figure 19) 0.5 Vns 0.66 Vns 0.80 Vns 1.00 Vns 1.33 Vns<br />
Maximum undershoot area below VSS (see Figure 20) 0.5 Vns 0.66 Vns 0.80 Vns 1.00 Vns 1.33 Vns<br />
Table 26: Clock, Data, Strobe, and Mask Balls<br />
Applies to DQ, DQS, DQS#, RDQS, RDQS#, UDQS, UDQS#, LDQS, LDQS#, DM, UDM, and LDM<br />
Specification<br />
Parameter<br />
-187E -25/-25E -3/-3E -37E -5E<br />
Maximum peak amplitude allowed for overshoot area<br />
(see Figure 19)<br />
0.50V 0.50V 0.50V 0.50V 0.50V<br />
Maximum peak amplitude allowed for undershoot area<br />
(see Figure 20)<br />
0.50V 0.50V 0.50V 0.50V 0.50V<br />
Maximum overshoot area above VDDQ (see Figure 19) 0.19 Vns 0.23 Vns 0.23 Vns 0.28 Vns 0.38 Vns<br />
Maximum undershoot area below VSSQ (see Figure 20) 0.19 Vns 0.23 Vns 0.23 Vns 0.28 Vns 0.38 Vns<br />
Figure 19: Overshoot<br />
Figure 20: Undershoot<br />
Volts (V)<br />
Volts (V)<br />
V DD /V DDQ<br />
V SS /V SSQ<br />
V SS /V SSQ<br />
Maximum amplitude<br />
Time (ns)<br />
Maximum amplitude<br />
<strong>1Gb</strong>: <strong>x8</strong>, <strong>x16</strong> <strong>Automotive</strong> <strong>DDR2</strong> <strong>SDRAM</strong><br />
AC Overshoot/Undershoot Specification<br />
Time (ns)<br />
Overshoot area<br />
Undershoot area<br />
PDF: 09005aef840eff89<br />
1gbddr2_ait_aat.pdf – Rev. C 7/11 EN 51 <strong>Micron</strong> Technology, Inc. reserves the right to change products or specifications without notice.<br />
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