EM428M1644RTA_15 Datasheet, PDF (9/20 Pages) Eorex Corporation – Double DATA RATE SDRAM

eorex
EM428M1644RTA
AC Operating Test Characteristics (Continued)
(V_DD=2.5V±0.2V, T_A=0°C ~70°C)
Symbol
Parameter
t_RPST
t_RAS
t_RC
t_RFC
t_RCD
t_RP
t_RRD
t_CCD
t_CDLR
t_CDLW
t_DPL
t_XSNR
t_XSRD
t_REFI
Read Postamble
Active to Precharge command
period
Active to Active command period
Auto Refresh Row Cycle Time
Active to Read or Write delay
Precharge command period
Active bank A to B command period
Column address to column address
delay
Last data in to Read command
Last data in to Write command
Last data in to Precharge command
Exit self Refresh to non-read
command
Exit self Refresh to read command
Average periodic refresh interval
-5
Min. Max.
0.4 0.6
40 70k
55
70
15
15
10
1
2.5 t_CK- t_DQSS
0
2
75
200
15.6
-6
Min. Max.
0.4 0.6
42 70k
60
72
18
18
12
1
2.5 t_CK- t_DQSS
0
2
75
200
15.6
-75
Min. Max.
0.4 0.6
45 70k
65
75
20
20
15
1
2.5 t_CK- t_DQSS
0
2
75
200
15.6
Units
t_CK
ns
ns
ns
ns
ns
ns
t_CK
t_CK
t_CK
t_CK
ns
ns
us
Apr. 2007
www.eorex.com
9/20