64Mbit – Enhanced SDRAM
8Mx8, 4Mx16 ESDRAM
Preliminary Datasheet
Electrical Characteristics
Absolute Maximum Ratings
Description
Symbol
VDD
Value
-1V to +4.6V
Power Supply Voltage
I/O Power Supply Voltage
Voltage on any Pin with Respect to Ground
Operating Temperature (ambient)
Storage Temperature
VDDQ
VIN, VOUT
TA
-1V to +4.6V, where VDDQ ≤ VDD+1V
-0.5V to +4.6V
0°C to +70°C
Tstg
PD
-55°C to +150°C
TBD
Power Dissipation
DC Output Current (I/O pins)
IOUT
50mA
Stresses greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating
only, and the functional operation of the device at these, or any other conditions above those listed in the operational section of the
specification, is not implied. Exposure to conditions at absolute maximum ratings for extended periods may affect device reliability.
DC Operating Conditions (TA = 0°C to 70°C)
Symbol
VDD
VDDQ
VIH1
VIL1
VIH2
VIL2
II(L)
IO(L)
Parameter
Min
3.135
2.3
2.0
-0.3
1.7
-0.3
-
Typical
Max
Units
V
V
V
V
V
V
µA
µA
V
Notes
Supply Voltage
3.3
3.63
3.63
VDD + 0.3
0.8
VDDQ + 0.3
I/O Supply Voltage
Input High Voltage
Input Low Voltage
-
3.3
0.0
2.5
0.0
-
-
-
-
-
1
2, 3
2, 3
4
Input High Voltage (DQ pins)
Input Low Voltage (DQ pins)
Input Leakage Current (VSS ≤ VIN ≤ VDD)
Output Leakage Current (VSSQ ≤ VDQ ≤ VDDQ
Output High Voltage (IOUT = -4mA)
Output Low Voltage (IOUT = +4mA)
Output High Voltage (IOUT = -2mA)
Output Low Voltage (IOUT = +2mA)
0.7
±5
±5
-
0.4
-
4
-
)
VOH1
VOL1
VOH2
VOL2
2.4
-
2.0
-
3
3
4
4
V
V
V
-
0.4
Notes:
1.
V
DDQ must be no more than 0.3V higher than VDD.
2. Applies to all input-only pins regardless of VDDQ voltage.
3. Applies to DQ pins when VDDQ = 3.3V.
4. Applies to DQ pins when VDDQ = 2.5V.
This is a product in sampling or pre-production phase of development. Charac-
teristic data and other specifications are subject to change without notice.
Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921
PHONE: (800) 545-DRAM; FAX: (719) 488-9095; http://www.edram.com
Revision 1.1
Page 15 of 33
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
