IC61C6416 Datasheet, PDF (77/80 Pages) Integrated Circuit Solution Inc – 64K X 16 HIGH-SPEED CMOS STATIC RAM

HYB18T256324F–[16/20/22]
256-Mbit DDR SGRAM
Electrical Characteristics
4.14
AC Characteristics and Settings
The following tables are meant as a guideline to correctly set the most important timing parameters depending on
speed sort and clock frequency.
Table 44 HYB18T256324F–16
Frequency / t_CK
CAS
t_RC
Latency
t_RFC
t_RAS
t_RP
t_WR
t_RRD
t_RCDRD t_RCDWR Unit
600 MHz / 1.6ns
7
23
33
15
8
7
5
10
7
t_CK
500 MHz / 2.0ns
7
19
27
12
7
6
4
8
6
t_CK
455 MHz / 2.2ns
7
17
25
11
6
5
4
8
6
t_CK
400 MHz / 2.5ns
6
15
22
10
6
5
4
7
5
t_CK
370 MHz / 2.7ns
6
14
20
9
5
5
3
6
5
t_CK
300 MHz / 3.0ns
6
12
17
8
4
4
3
5
4
t_CK
Table 45 HYB18T256324F–20
Frequency / t_CK
CAS
t_RC
Latency
t_RFC
t_RAS
t_RP
t_WR
t_RRD
t_RCDRD t_RCDWR Unit
500 MHz / 2.0ns
455 MHz / 2.2ns
400 MHz / 2.5ns
370 MHz / 2.7ns
300 MHz / 3.0ns
7
19
27
12
7
6
4
8
5
t_CK
7,6
17
25
11
6
5
4
8
5
t_CK
7,6
15
22
10
6
5
4
7
4
t_CK
6
14
20
9
5
5
3
6
4
t_CK
6
12
17
8
4
4
3
5
3
t_CK
Table 46 HYB18T256324F–22
Frequency / t_CK
CAS
t_RC
Latency
t_RFC
t_RAS
t_RP
t_WR
t_RRD
t_RCDRD t_RCDWR Unit
455 MHz / 2.2ns
400 MHz / 2.5ns
370 MHz / 2.7ns
300 MHz / 3.0ns
266 MHz / 3.8ns
250MHZ / 4.0ns
7
18
25
12
6
5
4
8
5
t_CK
7,6
16
22
11
6
5
4
7
5
t_CK
7,6
15
20
10
5
5
4
7
4
t_CK
5
12
17
8
4
4
3
6
4
t_CK
5
11
15
7
4
3
3
5
3
t_CK
5
10
14
7
4
3
3
5
3
t_CK
Data Sheet
77
Rev. 1.11, 04-2005
10292004-DOXT-FS0U