AS4C64M32MD2-25BCN datasheet(77/129 Pages) ALSC

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6. AC & DC Operating Conditions

Operation or timing that is not specified is illegal, and after such an event, in order to guarantee proper operation, the

LPDDR2 Device must be powered down and then restarted through the specialized initialization sequence before

normal operation can continue.

6.1 Recommended DC Operating Conditions

Table 20 — Recommended LPDDR2-S4 DC Operating Conditions

Symbol

LPDDR2-S4B

DRAM

Unit

Min

Typ

Max

VDD1

1.70

1.80

1.95

Core Power1

VDD2

1.14

1.20

1.30

Core Power2

VDDCA

1.14

1.20

1.30

Input Buffer Power

VDDQ

1.14

1.20

1.30

I/O Buffer Power

NOTE 1 VDD1 uses significantly less power than VDD2

6.2 Input Leakage Current

Table 21 — Input Leakage Current

Parameter / Condition

Symbol

min

Max

Unit

Notes

Input Leakage current

-2

For CA, CKE, CS#, CK, CK#

Any input 0

≤ VIN ≤ VDDCA

(All other pins not under test =0V

VREF supply leakage current

IVREF

-1

VREFDQ = VDDQ/2 or VREFCA = VDDCA/2

(All other pins not under test =0V)

NOTE 1 The minimum limit requirement is for testing purposes. The leakage current on VREFCA and VREFDQ pins should be minimal.

NOTE 2 Although DM is for input only, the DM leakage shall match the DQ and DQS/DQS# output leakage specification.

6.3 Operating Temperature Range

Table 22 — Operating Temperature Range

Parameter /

Condition

Symbol

Min

Max

Unit

Standard

TOPER

-25

℃

NOTE 1 Operating Temperature is the case surface temperature on the center/top side of the LPDDR2 device. For the measurement conditions,

please refer to JESD51-2 standard.

NOTE 2 Either the device case temperature rating or the temperature sensor may be used to set an appropriate refresh rate , determine the need

for AC timing de-rating and/or monitor the operating temperature. When using the temperature sensor, the actual device case temperature may be

higher than the TOPER rating that applies for the Standard or Extended Temperature Ranges. For example, TCASE may be above 85℃ when the

temperature sensor indicates a temperature of less than 85℃.

AS4C64M32MD2-25BCN

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