EBE41AE4ACFA Datasheet, PDF (14/27 Pages) Elpida Memory – 4GB Registered DDR2 SDRAM DIMM

EBE41AE4ACFA
DC Characteristics 2 (TC = 0°C to +85°C, VDD, VDDQ = 1.8V ± 0.1V)
(DDR2 SDRAM Component Specification)
Parameter
Symbol
Value
Unit Notes
Input leakage current
ILI
2
µA VDD ≥ VIN ≥ VSS
Output leakage current
ILO
Minimum required output pull-up under AC
test load
VOH
Maximum required output pull-down under
AC test load
VOL
Output timing measurement reference level VOTR
5
VTT + 0.603
VTT − 0.603
0.5 × VDDQ
µA VDDQ ≥ VOUT ≥ VSS
V
5
V
5
V
1
Output minimum sink DC current
IOL
+13.4
mA 3, 4, 5
Output minimum source DC current
IOH
−13.4
mA 2, 4, 5
Notes: 1. The VDDQ of the device under test is referenced.
2. VDDQ = 1.7V; VOUT = 1.42V.
3. VDDQ = 1.7V; VOUT = 0.28V.
4. The DC value of VREF applied to the receiving device is expected to be set to VTT.
5. After OCD calibration to 18Ω at TC = 25°C, VDD = VDDQ = 1.8V.
DC Characteristics 3 (TC = 0°C to +85°C, VDD, VDDQ = 1.8V ± 0.1V)
(DDR2 SDRAM Component Specification)
Parameter
Symbol
min.
max.
Unit Notes
AC differential input voltage
VID (AC)
0.5
VDDQ + 0.6
V
1, 2
AC differential cross point voltage
VIX (AC)
0.5 × VDDQ − 0.175 0.5 × VDDQ + 0.175 V
2
AC differential cross point voltage
VOX (AC)
0.5 × VDDQ − 0.125 0.5 × VDDQ + 0.125 V
3
Notes: 1. VID (AC) specifies the input differential voltage |VTR -VCP| required for switching, where VTR is the true
input signal (such as CK, DQS, RDQS) and VCP is the complementary input signal (such as /CK, /DQS,
/RDQS). The minimum value is equal to VIH (AC) − VIL (AC).
2. The typical value of VIX(AC) is expected to be about 0.5 × VDDQ of the transmitting device and VIX(AC)
is expected to track variations in VDDQ . VIX(AC) indicates the voltage at which differential input signals
must cross.
3. The typical value of VOX(AC) is expected to be about 0.5 × VDDQ of the transmitting device and
VOX(AC) is expected to track variations in VDDQ . VOX(AC) indicates the voltage at which differential
output signals must cross.
VDDQ
VTR
VCP
VID
Crossing point
VIX or VOX
VSSQ
Differential Signal Levels*1, 2
Data Sheet E1078E40 (Ver. 4.0)
14