EDB8164B4PR-1DITF-R datasheet(107/152 Pages) MICRON

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Table 67: Operating Temperature Range

Parameter/Condition

Symbol

Min

Max

Unit

Standard (WT) temperature range

TCASE1

–30

+85

˚C

Industrial (IT) temperature range

–40

+85

˚C

Automotive (AT) temperature range

–40

+105

˚C

Notes:

1. Operating temperature is the case surface temperature at the center of the top side of

the device. For measurement conditions, refer to the JESD51-2 standard.

2. Some applications require operation in the maximum case temperature range, between

85˚C and 105˚C. For some LPDDR2 devices, derating may be necessary to operate in this

range (see the MR4 Device Temperature (MA[7:0] = 04h) table).

3. Either the device operating temperature or the temperature sensor can be used to set

an appropriate refresh rate, determine the need for AC timing derating, and/or monitor

the operating temperature (see Temperature Sensor). When using the temperature sen-

sor, the actual device case temperature may be higher than the TCASE rating that applies

for the operating temperature range. For example, TCASE could be above 85˚C when the

temperature sensor indicates a temperature of less than 85˚C.

AC and DC Logic Input Measurement Levels for Single-Ended Signals

Table 68: Single-Ended AC and DC Input Levels for CA and CS_n Inputs

Symbol

Parameter

LPDDR2-1066 to LPDDR2-466 LPDDR2-400 to LPDDR2-200

Unit

Notes

Min

Max

Min

Max

VIHCA(AC)

AC input logic HIGH

VREF + 0.220

Note 2

VREF + 0.300

Note 2

1, 2

VILCA(AC)

AC input logic LOW

Note 2

VREF - 0.220

Note 2

VREF - 0.300

1, 2

VIHCA(DC)

DC input logic HIGH

VREF + 0.130

VDD2

VREF + 0.200

VDD2

VILCA(DC)

DC input logic LOW

VSS

VREF - 0.130

VSS

VREF - 0.200

VREFCA(DC)

Reference voltage for

CA and CS_n inputs

0.49 × VDD2

0.51 × VDD2

0.49 × VDD2

0.51 × VDD2

3, 4

Notes:

1. For CA and CS_n input-only pins. VREF = VREFCA(DC).

2. See Overshoot and Undershoot Definition.

3. The AC peak noise on VREFCA could prevent VREFCA from deviating more than ±1% VDD2

from VREFCA(DC) (for reference, approximately ±12mV).

4. For reference, approximately VDD2/2 ±12mV.

Table 69: Single-Ended AC and DC Input Levels for CKE

Symbol

Parameter

Min

Max

Unit

Notes

VIHCKE

CKE input HIGH level

0.8 × VDD2

Note 1

VILCKE

CKE input LOW level

Note 1

0.2 × VDD2

Note:

1. See Overshoot and Undershoot Definition.

216-Ball and 220-Ball, Dual-Channel LPDDR2 SDRAM

AC and DC Logic Input Measurement Levels for Single-Ended

Signals

09005aef85eb530a

216b_220b_2ch_2e0e_embedded_lpddr2.pdf – Rev. F 08 /16 EN

107

Micron Technology, Inc. reserves the right to change products or specifications without notice.

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