Unbuffered DIMM
datasheet
Rev. 1.0
DDR3L SDRAM
11. AC & DC Input Measurement Levels
11.1 AC & DC Logic Input Levels for Single-ended Signals
[ Table 2 ] Single Ended AC and DC input levels for Command and Address
Symbol | Parameter |
| Unit | NOTE | ||
Min. |
| Max. | ||||
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| 1.35V |
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VIH.CA(DC90) | DC input logic high | VREF + 90 |
| VDD | mV | 1,5a) |
VIL.CA(DC90) | DC input logic low | VSS |
| VREF - 90 | mV | 1,6a) |
VIH.CA(AC160) | AC input logic high | VREF + 160 |
| Note 2 | mV | 1,2 |
VIL.CA(AC160) | AC input logic low | Note 2 |
| VREF - 160 | mV | 1,2 |
VIH.CA(AC135) | AC input logic high | VREF+135 |
| Note 2 | mV | 1,2 |
VIL.CA(AC135) | AC input logic lowM | Note 2 |
| mV | 1,2 | |
VREFCA(DC) | Reference Voltage for ADD, | 0.49*VDD |
| 0.51*VDD | V | 3,4 |
CMD inputs |
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| 1.5V |
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VIH.CA(DC100) | DC input logic high | VREF + 100 |
| VDD | mV | 1,5b) |
VIL.CA(DC100) | DC input logic low | VSS |
| VREF - 100 | mV | 1,6b) |
VIH.CA(AC175) | AC input logic high | VREF + 175 |
| Note 2 | mV | 1,2,7 |
VIL.CA(AC175) | AC input logic low | Note 2 |
| VREF - 175 | mV | 1,2,8 |
VIH.CA(AC150) | AC input logic high | VREF+150 |
| Note 2 | mV | 1,2,7 |
VIL.CA(AC150) | AC input logic low | Note 2 |
| mV | 1,2,8 | |
VREFCA(DC) | Reference Voltage for ADD, | 0.49*VDD |
| 0.51*VDD | V | 3,4 |
CMD inputs |
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NOTE :
1.For input only pins except RESET, VREF = VREFCA(DC)
2.See "Overshoot and Undershoot specifications" section.
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.CA(AC175) and VIH.CA(AC150); VIH.CA(AC175) value is used when VREF + 175mV is referenced and VIH.CA(AC150) value is used when VREF + 150mV is referenced.
8.VIL(ac) is used as a simplified symbol for VIL.CA(AC175) and VIL.CA(AC150); VIL.CA(AC175) value is used when VREF - 175mV is referenced and VIL.CA(AC150) value is used when VREF - 150mV is referenced.
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