MT46H16M32LF 데이터 시트보기 (PDF) - Micron Technology

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MT46H16M32LF

Mobile Low-Power DDR SDRAM

Micron Technology 

512Mb: x16, x32 Mobile LPDDR SDRAM

Electrical Specifications – AC Operating Conditions

Table 12: Electrical Characteristics and Recommended AC Operating Conditions (Continued)

Notes 1–9 apply to all the parameters in this table; VDD/VDDQ = 1.70–1.95V

-5

-54

-6

Parameter

Symbol Min Max Min Max Min Max

PRECHARGE command

period

tRP

15

–

16.2

–

18

–

DQS read preamble CL = 3 tRPRE

0.9

1.1

0.9

1.1

0.9

1.1

CL = 2 tRPRE

0.5

1.1

0.5

1.1

0.5

1.1

DQS read postamble

tRPST

0.4

0.6

0.4

0.6

0.4

0.6

Active bank a to active

bank b command

tRRD

10

–

10.8

–

12

–

Read of SRR to next valid

command

tSRC CL + 1 – CL + 1 – CL + 1 –

SRR to read

tSRR

2

–

2

–

2

–

Internal temperature sen-

tTQ

2

–

2

–

2

–

sor valid temperature out-

put enable

DQS write preamble

tWPRE 0.25

–

0.25

–

0.25

–

DQS write preamble setup tWPRES

0

–

0

–

0

–

time

DQS write postamble

tWPST

0.4

0.6

0.4

0.6

0.4

0.6

Write recovery time

tWR

15

–

15

–

15

–

Internal WRITE-to-READ

tWTR

2

–

2

–

1

–

command delay

Exit power-down mode to

tXP

2

–

2

–

1

–

first valid command

Exit self refresh to first

valid command

tXSR

112.5

–

112.5

–

112.5

–

-75

Min Max

22.5

–

0.9 1.1

0.5 1.1

0.4 0.6

15

–

CL + 1 –

2

–

2

–

0.25

–

0

–

0.4 0.6

15

–

1

–

1

–

112.5 –

Unit Notes

ns

tCK

tCK

tCK

ns

tCK

tCK

ms

tCK

ns 25, 26

tCK

27

ns

28

tCK

tCK

ns

29

Notes:

1. All voltages referenced to VSS.

2. All parameters assume proper device initialization.

3. Tests for AC timing and electrical AC and DC characteristics may be conducted at nomi-

nal supply voltage levels, but the related specifications and device operation are guar-

anteed for the full voltage ranges specified.

4. The circuit shown below represents the timing reference load used in defining the rele-

vant timing parameters of the device. It is not intended to be either a precise represen-

tation of the typical system environment or a depiction of the actual load presented by

a production tester. System designers will use IBIS or other simulation tools to correlate

the timing reference load to system environment. Specifications are correlated to pro-

duction test conditions (generally a coaxial transmission line terminated at the tester

electronics). For the half-strength driver with a nominal 10pF load, parameters tAC and

tQH are expected to be in the same range. However, these parameters are not subject to

production test but are estimated by design/characterization. Use of IBIS or other simu-

PDF: 09005aef83dd2b3e

t67m_512mb_mobile_lpddr.pdf - Rev. H 06/13 EN

28

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

© 2009 Micron Technology, Inc. All rights reserved.

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