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PDF DD2508AETA Data sheet ( Hoja de datos )

Número de pieza DD2508AETA
Descripción EDD2508AETA
Fabricantes Elpida 
Logotipo Elpida Logotipo



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No Preview Available ! DD2508AETA Hoja de datos, Descripción, Manual

DATA SHEET
256M bits DDR SDRAM
EDD2508AETA (32M words × 8 bits)
EDD2516AETA (16M words × 16 bits)
Specifications
Density: 256M bits
Organization
8M words × 8 bits × 4 banks (EDD2508AETA)
www.DataSheet4U.com4M words × 16 bits × 4 banks (EDD2516AETA)
Package: 66-pin plastic TSOP (II)
Lead-free (RoHS compliant)
Power supply:
DDR400:
VDD, VDDQ = 2.6V ± 0.1V
DDR333, 266: VDD, VDDQ = 2.5V ± 0.2V
Data rate: 400Mbps/333Mbps/266Mbps (max.)
Four internal banks for concurrent operation
Interface: SSTL_2
Burst lengths (BL): 2, 4, 8
Burst type (BT):
Sequential (2, 4, 8)
Interleave (2, 4, 8)
/CAS Latency (CL): 2, 2.5, 3
Precharge: auto precharge option for each burst
access
Driver strength: normal/weak
Refresh: auto-refresh, self-refresh
Refresh cycles: 8192 cycles/64ms
Average refresh period: 7.8µs
Operating ambient temperature range
TA = 0°C to +70°C
Features
Double-data-rate architecture; two data transfers per
clock cycle
The high-speed data transfer is realized by the 2 bits
prefetch pipelined architecture
Bi-directional data strobe (DQS) is transmitted
/received with data for capturing data at the receiver
Data inputs, outputs, and DM are synchronized with
DQS
DQS is edge-aligned with data for READs; center-
aligned with data for WRITEs
Differential clock inputs (CK and /CK)
DLL aligns DQ and DQS transitions with CK
transitions
Commands entered on each positive CK edge; data
and data mask referenced to both edges of DQS
Data mask (DM) for write data
Document No. E0859E50 (Ver. 5.0)
Date Published September 2007 (K) Japan
Printed in Japan
URL: http://www.elpida.com
Elpida Memory, Inc. 2006-2007

1 page




DD2508AETA pdf
EDD2508AETA, EDD2516AETA
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
Supply voltage relative to VSS
Short circuit output current
Power dissipation
Operating ambient temperature
www.DataSheet4U.Sctoomrage temperature
VT
VDD
IOS
PD
TA
Tstg
–1.0 to +3.6
–1.0 to +3.6
50
1.0
0 to +70
–55 to +125
V
V
mA
W
°C
°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°C to +70°C)
Parameter
Symbol
Speed
min. typ.
max.
Unit Notes
Supply voltage
VDD,VDDQ DDR400
2.5
2.6
2.7
V1
Input reference voltage
VDD, VDDQ
VSS,
VSSQ
VREF
DDR333, 266
2.3 2.5 2.7
000
0.49 × VDDQ 0.50 × VDDQ 0.51 × VDDQ
V
V
V
1
Termination voltage
VTT
VREF – 0.04 VREF
VREF + 0.04
V
Input high voltage
VIH (DC)
VREF + 0.15 —
VDDQ + 0.3
V2
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
V4
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 excursion 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.
Data Sheet E0859E50 (Ver. 5.0)
5

5 Page





DD2508AETA arduino
EDD2508AETA, EDD2516AETA
Test Conditions
Parameter
Input reference voltage
Termination voltage
Input high voltage
Input low voltage
Input differential voltage, CK and /CK
inputs
Input differential cross point voltage,
CK and /CK inputs
Input signal slew rate
www.DataSheet4U.com
Symbol
VREF
VTT
VIH (AC)
VIL (AC)
VID (AC)
VIX (AC)
SLEW
CK VID
/CK
Value
VDDQ/2
VREF
VREF + 0.31
VREF 0.31
0.62
VREF
1
tCK
tCL tCH
VIX
VDD
VREF
VSS
VDD
VIH VREF
VIL
VSS
t
SLEW = (VIH (AC) – VIL (AC))/t
VTT
Measurement point
DQ
RT = 50
CL = 30pF
Input Waveforms and Output Load
Unit
V
V
V
V
V
V
V/ns
Data Sheet E0859E50 (Ver. 5.0)
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