w3e16m72s-xbx White Electronic Designs Corporation, w3e16m72s-xbx Datasheet - Page 12

• Manufacturer Part Number: w3e16m72s-xbx
• Description: 16mx72 Sdram
• Manufacturer: White Electronic Designs Corporation

February 2005
Rev. 7
Parameter
Access window of DQs from CLK/CLK#
CLK high-level width (30)
CLK low-level width (30)
Clock cycle time
DQ and DM input hold time relative to DQS (26, 31)
DQ and DM input setup time relative to DQS (26, 31)
DQ and DM input pulse width (for each input) (31)
Access window of DQS from CLK/CLK#
DQS input high pulse width
DQS input low pulse width
DQS-DQ skew, DQS to last DQ valid, per group, per access (25, 26)
Write command to fi rst DQS latching transition
DQS falling edge to CLK rising - setup time
DQS falling edge from CLK rising - hold time
Half clock period (34)
Data-out high-impedance window from CLK/CLK# (18, 42)
Data-out low-impedance window from CLK/CLK# (18, 43)
Address and control input hold time (fast slew rate) (14)
Address and control input setup time (fast slew rate) (14)
Address and control input hold time (slow slew rate) (14)
Address and control input setup time (slow slew rate) (14)
LOAD MODE REGISTER command cycle time
DQ-DQS hold, DQS to fi rst DQ to go non-valid, per access (25, 26)
Data hold skew factor
ACTIVE to PRECHARGE command (35)
ACTIVE to READ with Auto precharge command
ACTIVE to ACTIVE/AUTO REFRESH command period
AUTO REFRESH command period (50)
ACTIVE to READ or WRITE delay
PRECHARGE command period
DQS read preamble (42)
DQS read postamble
ACTIVE bank a to ACTIVE bank b command
DQS write preamble
DQS write preamble setup time (20, 21)
DQS write postamble (19)
Write recovery time
Internal WRITE to READ command delay
Data valid output window (25)
REFRESH to REFRESH command interval (Commercial & Industrial temp only) (23)
REFRESH to REFRESH command interval (Military temp only) (23)
Average periodic refresh interval (Commercial & Industrial temp only) (23)
Average periodic refresh interval (Military temp only) (23)
Terminating voltage delay to V
Exit SELF REFRESH to non-READ command
Exit SELF REFRESH to READ command
ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC OPERATING CHARACTERISTICS
White Electronic Designs
CC
(53)
(NOTES 1-5, 14-17, 33)
CL = 2.5 (45, 52)
CL = 2 (45, 52)
12
Symbol
t
CK
t
t
t
t
t
t
WPRES
t
CK
t
DQSCK
t
t
t
t
t
t
t
t
DQSH
DQSQ
t
t
t
t
t
WPRE
t
t
t
DQSL
DQSS
t
t
t
t
RPRE
RPST
WPST
REFC
REFC
t
XSNR
XSRD
DIPW
t
t
t
t
t
t
t
t
DSH
t
t
t
MRD
t
QHS
t
RCD
t
RRD
WTR
REFI
REFI
t
DSS
t
RAS
RAP
RFC
na
VTD
IH F
IH S
IS S
WR
AC
CH
DH
DS
HP
HZ
IS F
QH
RC
RP
CL
(2.5)
LZ
(2)
t
266Mbps CL2.5
CH
-0.75
-0.75
-0.75
0.45
0.45
1.75
0.35
0.35
0.75
0.90
0.90
0.25
200Mbps CL2
Min
200
7.5
0.5
0.5
0.2
0.2
0.9
0.4
0.4
White Electronic Designs Corporation • [phone] • www.wedc.com
10
15
40
20
65
75
20
20
15
15
75
1
1
0
1
0
, t
t
QH
t
CL
HP
- t
- t
DQSQ
QHS
120,000
+0.75
+0.75
+0.75
Max
0.55
0.55
1.25
0.75
70.3
0.5
1.1
0.6
0.6
7.8
3.9
13
13
35
t
250Mbps CL2.5
CH
0.45
0.45
0.35
0.35
0.75
0.25
Min
-0.8
-0.8
-0.8
200
200Mbps CL2
0.6
0.6
0.2
0.2
1.1
1.1
1.1
1.1
0.9
0.4
0.4
10
16
40
20
70
80
20
20
15
15
80
8
2
0
1
0
, t
t
t
QH
CL
HP
W3E16M72S-XBX
- t
- t
DQSQ
QHS
120,000
Max
+0.8
0.55
0.55
+0.8
1.25
+0.8
70.3
0.6
1.1
0.6
0.6
7.8
3.9
13
13
35
1
t
200Mbps CL2.5
CH
0.45
0.45
0.35
0.35
0.75
0.25
-0.8
-0.8
-0.8
150Mbps CL2
Min
200
0.6
0.6
0.2
0.2
1.1
1.1
1.1
1.1
0.9
0.4
0.4
10
13
16
40
20
70
80
20
20
15
15
80
2
0
1
0
, t
t
QH
t
CL
HP
- t
- t
DQSQ
QHS
120,000
Max
+0.8
0.55
0.55
+0.8
1.25
+0.8
70.3
0.6
1.1
0.6
0.6
7.8
3.9
13
15
35
1
Units
t
t
t
t
t
t
t
t
t
t
t
t
t
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
µs
µs
ns
ns
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK