W3HG2128M72ACER-AD6 Datasheet, PDF (4/13 Pages) White Electronic Designs Corporation – 2GB - 2x128Mx72 DDR2 SDRAM REGISTERED, w/PLL, VLP

White Electronic Designs ^{W3HG2128M72ACER-AD6}
PRELIMINARY
RECOMMENDED DC OPERATING CONDITIONS
All Voltages Referenced to VSS
Rating
Parameter
Symbol
Min.
Type
Max.
Units
Notes
Supply Voltage
VCC
1.7
1.8
1.9
V
4
Supply Voltage for DLL
VCCL
1.7
1.8
1.9
V
4
Supply Voltage for Output
VCCQ
1.7
1.8
1.9
V
4
Input Reference Voltage
VREF
0.49*VCCQ
0.50*VCCQ
0.51*VCCQ
V
1, 2
Termination Voltage
VTT
VREF-0.04
VREF
VREF+0.04
V
3
There is no specific device VCC supply voltage requirement for SSTL-1.8 compliance. However under all conditions VCCQ must be less than or equal to VCC.
1. The value of VREF may be selected by the user to provide optimum noise margin in the system. Typically the value of VREF is expected to be about 0.5 x VCCQ of the transmitting
device and VREF is expected to track variations in VCCQ.
2. Peak to peak AC noise on VREF may not exceed ±2% VREF(DC).
3. VTT of transmitting device must track VREF of receiving device.
4. VCC, VCCQ and VCCL are tied together on this module.
ABSOLUTE MAXIMUM RATINGS
SSTL_1.8V
Symbol
Parameter
Rating
Units
Notes
VCC
Voltage on VCC pin relative to VSS
- 1.0 V - 2.3 V
V
5
VCCQ
Voltage on VCCQ pin relative to VSS
- 0.5 V - 2.3 V
V
5
VCCL
Voltage on VCCL pin relative to VSS
- 0.5 V - 2.3 V
V
5
VIN, VOUT
Voltage on any pin relative to VSS
- 0.5 V - 2.3 V
V
5
TSTG
Storage Temperature
-55 to +100
C
5, 6
5. Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect reliability.
6. Storage Temperature is the case surface temperature on the center/top side of the DRAM. For the measurement conditions, please refer to JESD51-2 standard.
CAPACITANCE
TA = 25°C, f = VREF = Gnd, f = 100MHz, VCC = VCCQ = 1.8V
Parameter
Symbol
Max
Input Capacitance: CK, CK#
Input Capacitance: CKE, CS#
Input Capacitance: Addr. RAS#, CAS#, WE#, ODT
Input/Output Capacitance: DQ, DQS, DM, DQS#, CB
CCK
5.6
CI1
12.4
CI2
12.4
CIO
15.6
Units
pF
pF
pF
pF
May 2006
Rev. 5
4
White Electronic Designs Corporation • [phone] • www.wedc.com