M65KG512AB8W9 datasheet(30/54 Pages) STMICROELECTRONICS

30 / 54 page

DC and ac parameters

M65KG526AB

30/54

tRP

RAS Precharge time

22.5

tREF

Average Periodic Refresh time

7.8

µs

tSRE

tSREX

Self Refresh Exit Time

165

tWPRES

Write Preamble setup time

The above timings are measured according to the test conditions shown in Table 10: Operating and ac measurement

conditions with driver strength set to “Full Strength” (EMR5 to EMR6 = ‘00’).

These timings define the signal transition delays from K or K cross point, that is when K or K signal crosses VREF.

The timing reference level is VREF.

tOHZ and tDQSHZ define the transition time from Low-Z to High-Z of DQ0-DQ15 and UDQS/LDQS, at the end of a Burst

Read operation, respectively. They specify when data outputs stop being driven.

tOLZ and tDQSLZ define the transition time from High-Z to Low-Z of DQ0-DQ15 and UDQS/LDQS, at the end of a Burst Read

operation. They specify when data outputs begin to be driven.

Table 15.

AC characteristics(1) - TJ = −30 to 85 °C (continued)

Symbol

Alt

Parameter

M65KG512AB

Unit

Min

Max

Table 16.

AC characteristics(1) - TJ = −30 to 105 °C

Symbol

Alt

Parameter

M65KG512AB

Unit

133MHz

166MHz

Min

Max

Min

Max

tAC

(2)

Data Output access time from K and K

1.5

6.0

2.0

5.0

tAS

(3)

tIS

Address and Control Input setup time

1.4

tAH

(3)

tIH

Address Control Input hold time

1.4

tCK

Clock Cycle Time

7.5

6.0

tDQSCK

(2)

UDQS/LDQS access time from K and K

1.5

6.0

2.0

5.0

tDIPW

Data Output and LDQM/UDQM inputs pulse width

1.8

1.75

tDQSHZ

(4)

UDQS/LDQS High-Z Time from K and K

1.5

6.0

1.5

4.5

tDQSLZ

(6)

UDQS/LDQS Low-Z time from K and K

1.5

6.0

1.5

4.5

tDQSQ

(3)

UDQS/LDQS to Data Output skew

0.65

0.5

tDS

(3)

Data Input and UDQM/LDQM setup time

0.9

tDH

(3)

Data Input and UDQM/LDQM hold time

0.9

tDAL

Data Input Valid to Precharge command

2tCK+22.5

tWR+tRP

tIPW

Addresses and control pulse width

2.8

2.7

tOHZ

(4)

tHZ

Data Output High-Z from K and K

1.5

6.0

1.0

5.5

tOLZ

(5)

tLZ

Data Output Low-Z from K and K

1.5

6.0

1.0

5.5

tQH

Data and LDQS/UDQS Output hold time from

DQS

tHP-tQHS

tQHS

Data hold skew factor

0.75

0.65

tRAS

RAS Active Time (Bank (Row) Activate to Bank

Precharge)

120000

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