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EDD2508AKTA-5-E Datasheet(PDF) 4 Page - Elpida Memory

Part No. EDD2508AKTA-5-E
Description  256M bits DDR SDRAM (32M words x 8 bits, DDR400)
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Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory

EDD2508AKTA-5-E Datasheet(HTML) 4 Page - Elpida Memory

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EDD2508AKTA-5-E
Preliminary Data Sheet E0609E20 (Ver. 2.0)
4
Electrical Specifications
• All voltages are referenced to VSS (GND).
• After power up, wait more than 200 µs and then, execute power on sequence and CBR (Auto) refresh before
proper device operation is achieved.
Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
Note
Voltage on any pin relative to VSS
VT
–1.0 to +3.6
V
Supply voltage relative to VSS
VDD
–1.0 to +3.6
V
Short circuit output current
IOS
50
mA
Power dissipation
PD
1.0
W
Operating ambient temperature
TA
0 to +70
°C
Storage temperature
Tstg
–55 to +125
°C
Caution
Exposing the device to stress above those listed in Absolute Maximum Ratings could cause
permanent damage. The device is not meant to be operated under conditions outside the limits
described in the operational section of this specification. Exposure to Absolute Maximum Rating
conditions for extended periods may affect device reliability.
Recommended DC Operating Conditions (TA = 0 to +70
°C)
Parameter
Symbol
min.
typ.
max.
Unit
Notes
Supply voltage
VDD,
VDDQ
2.5
2.6
2.7
V
1
VSS,
VSSQ
0
0
0
V
Input reference voltage
VREF
0.49
× VDDQ
0.50
× VDDQ 0.51 × VDDQ
V
Termination voltage
VTT
VREF – 0.04
VREF
VREF + 0.04
V
Input high voltage
VIH (DC)
VREF + 0.15
VDDQ + 0.3
V
2
Input low voltage
VIL (DC)
–0.3
VREF – 0.15
V
3
Input voltage level,
CK and /CK inputs
VIN (DC)
–0.3
VDDQ + 0.3
V
4
Input differential cross point
voltage, CK and /CK inputs
VIX (DC)
0.5
× VDDQ − 0.2V 0.5 × VDDQ
0.5
× VDDQ + 0.2V V
Input differential voltage,
CK and /CK inputs
VID (DC)
0.36
VDDQ + 0.6
V
5, 6
Notes: 1. VDDQ must be lower than or equal to VDD.
2. VIH is allowed to exceed VDD up to 3.6V for the period shorter than or equal to 5ns.
3. VIL is allowed to outreach below VSS down to –1.0V for the period shorter than or equal to 5ns.
4. VIN (DC) specifies the allowable DC execution of each differential input.
5. VID (DC) specifies the input differential voltage required for switching.
6. VIH (CK) min assumed over VREF + 0.18V, VIL (CK) max assumed under VREF – 0.18V
if measurement.


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