Unbuffered DIMM
datasheet
Rev. 1.0
DDR3L SDRAM
[ Table 3 ] Single Ended AC and DC input levels for DQ and DM
Symbol | Parameter | Unit | NOTE | |||||
Min. | Max. | Min. | Max. | |||||
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| 1.35V |
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VIH.DQ(DC90) | DC input logic high | VREF + 90 | VDD | VREF + 90 | VDD | mV | 1,5a) | |
VIL.DQ(DC90) | DC input logic low | VSS | VREF - 90 | VSS | VREF - 90 | mV | 1,6a) | |
VIH.DQ(AC160) | AC input logic high | VREF + 160 | Note 2 | - | - | mV | 1,2 | |
VIL.DQ(AC160) | AC input logic low | Note 2 | VREF - 160 | - | - | mV | 1,2 | |
VIH.DQ(AC135) | AC input logic high | VREF + 135 | Note 2 | VREF + 135 | Note 2 | mV | 1,2 | |
VIL.DQ(AC135) | AC input logic low | Note 2 | VREF - 135 | Note 2 | VREF - 135 | mV | 1,2 | |
VREFDQ(DC) | Reference Voltage for DQ, | 0.49*VDD | 0.51*VDD | 0.49*VDD | 0.51*VDD | V | 3,4 | |
DM inputs | ||||||||
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| 1.5V |
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VIH.DQ(DC100) | DC input logic high | VREF + 100 | VDD | VREF + 100 | VDD | mV | 1,5b) | |
VIL.DQ(DC100) | DC input logic low | VSS | VREF - 100 | VSS | VREF - 100 | mV | 1,6b) | |
VIH.DQ(AC175) | AC input logic high | VREF + 175 | NOTE 2 | - | - | mV | 1,2,7 | |
VIL.DQ(AC175) | AC input logic low | NOTE 2 | VREF - 175 | - | - | mV | 1,2,8 | |
VIH.DQ(AC150) | AC input logic high | VREF + 150 | NOTE 2 | VREF + 150 | NOTE 2 | mV | 1,2,7 | |
VIL.DQ(AC150) | AC input logic low | NOTE 2 | VREF - 150 | NOTE 2 | VREF - 150 | mV | 1,2,8 | |
VREFDQ(DC) | Reference Voltage for DQ, | 0.49*VDD | 0.51*VDD | 0.49*VDD | 0.51*VDD | V | 3,4 | |
DM inputs | ||||||||
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NOTE :
1.For input only pins except RESET, VREF = VREFDQ(DC)
2.See ’Overshoot/Undershoot Specification’ on page 18.
3.The AC peak noise on VREF may not allow VREF to deviate from VREF(DC) by more than ± 1% VDD (for reference : approx. ± 15mV)
4.For reference : approx. VDD/2 ± 15mV
5.VIH(dc) is used as a simplified symbol for VIH.CA(a) 1.35V : DC90, b) 1.5V : DC100)
6.VIL(dc) is used as a simplified symbol for VIL.CA(a) 1.35V : DC90, b) 1.5V : DC100)
7.VIH(ac) is used as a simplified symbol for VIH.DQ(AC175), VIH.DQ(AC150) ; VIH.DQ(AC175) value is used when VREF + 175mV is referenced, VIH.DQ(AC150) value is used when VREF + 150mV is referenced.
8.VIL(ac) is used as a simplified symbol for VIL.DQ(AC175), VIL.DQ(AC150) ; VIL.DQ(AC175) value is used when VREF - 175mV is referenced, VIL.DQ(AC150) value is used when VREF - 150mV is referenced.
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