EDD2508AKTA-6BLI ELPIDA [Elpida Memory], EDD2508AKTA-6BLI Datasheet - Page 6

• Manufacturer Part Number: EDD2508AKTA-6BLI
• Description: 256M bits DDR SDRAM WTR (Wide Temperature Range)
• Manufacturer: ELPIDA [Elpida Memory]

Pin Capacitance (TA = +25°C, VDD, VDDQ = 2.5V ± 0.2V)
Parameter
Input capacitance
Delta input capacitance
Data input/output capacitance
Delta input/output capacitance
Notes: 1. These parameters are measured on conditions:
AC Characteristics (TA = –40 to +85°C, VDD, VDDQ = 2.5V ± 0.2V, VSS, VSSQ = 0V)
Parameter
Clock cycle time
(CL = 2)
(CL = 2.5)
CK high-level width
CK low-level width
CK half period
DQ output access time from
CK, /CK
DQS output access time from CK, /CK
DQS to DQ skew
DQ/DQS output hold time from DQS
Data hold skew factor
Data-out high-impedance time from CK,
/CK
Data-out low-impedance time from CK,
/CK
Read preamble
Read postamble
DQ and DM input setup time
DQ and DM input hold time
DQ and DM input pulse width
Write preamble setup time
Write preamble
Write postamble
Write command to first DQS latching
transition
DQS falling edge to CK setup time
DQS falling edge hold time from CK
DQS input high pulse width
DQS input low pulse width
Address and control input setup time
Address and control input hold time
Address and control input pulse width
Preliminary Data Sheet E0434E10 (Ver. 1.0)
2. DOUT circuits are disabled.
TA = +25°C.
Symbol
CI1
CI2
Cdi1
Cdi2
CI/O
Cdio
Symbol
tCK
tCK
tCH
tCL
tHP
tAC
tDQSCK
tDQSQ
tQH
tQHS
tHZ
tLZ
tRPRE
tRPST
tDS
tDH
tDIPW
tWPRES
tWPRE
tWPST
tDQSS
tDSS
tDSH
tDQSH
tDQSL
tIS
tIH
tIPW
Pins
CK, /CK
All other input pins
CK, /CK
All other input-only pins
DQ, DM, DQS
DQ, DM, DQS
-6B
min.
7.5
6
0.45
0.45
min (tCH, tCL)
–0.7
–0.6
—
tHP – tQHS
—
–0.7
–0.7
0.9
0.4
0.45
0.45
1.75
0
0.25
0.4
0.75
0.2
0.2
0.35
0.35
0.75
0.75
2.2
6
f = 100MHz, VOUT = VDDQ/2, ΔVOUT = 0.2V,
min.
2.0
2.0
—
—
4.0
—
max.
12
12
0.55
0.55
—
0.7
0.6
0.45
—
0.55
0.7
0.7
1.1
0.6
—
—
—
—
—
0.6
1.25
—
—
—
—
—
—
—
Typ
—
—
—
—
—
—
EDD2508AKTA-LI
max.
3.0
3.0
0.25
0.5
5
0.5
Unit
ns
ns
tCK
tCK
tCK
ns
ns
ns
ns
ns
ns
ns
tCK
tCK
ns
ns
ns
ns
tCK
tCK
tCK
tCK
tCK
tCK
tCK
ns
ns
ns
Unit
pF
pF
pF
pF
pF
pF
Notes
10
2, 11
2, 11
3
5, 11
6, 11
8
8
7
9
8
8
7
Notes
1
1
1
1
1, 2
1