MT49H16M16 View Datasheet(PDF) - Micron Technology
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Description
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MT49H16M16 Datasheet PDF : 38 Pages
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256Mb: x16, x32 2.5V VEXT, 1.8V VDD, 1.8V VDDQ, RLDRAM
Electrical Characteristics
Electrical Characteristics
Stresses greater than those listed may cause permanent damage to the device. This is a
stress rating only, and functional operation of the device at these or any other condi-
tions 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.
Figure 30: Absolute Maximum Ratings
Parameter
Storage temperature
I/O voltage
Voltage on VEXT supply relative to VSS
Voltage on VDD supply relative to VSS
Voltage on VDDQ supply relative to VSS
Junction temperature
Min
Max
-55
-0.3V
-0.3
-0.3
-0.3
+150
VDDQ + 0.3
+2.8
+2.1
+2.1
110
Units
°C
V
V
V
V
°C
Notes
1
Notes: 1. Junction temperature depends upon package type, cycle time, loading, ambient tempera-
ture, and airflow.
Recommended DC Operation Ranges
All values are recommended operating conditions unless otherwise noted. External on
board (PCB) capacitance values are required as follows:
• VDDQ: 2 × 0.1µF/device
• VDD: 2 × 0.1µF/device
• VREF: 0.1µF/device
• VEXT : 0.1µF/device
Table 19: DC Electrical Characteristics and Operating Conditions
0°C ≤ TC ≤ +95°C; +1.7V ≤ VDD ≤ +1.95V unless otherwise noted
Descriptions
Supply voltage
Supply voltage
Isolated output buffer supply
Reference voltage
Symbol
VEXT
VDD
VDDQ
VREF
Min
2.38
1.7
1.7
0.49 × VDDQ
Max
2.63
1.95
VDD
0.51 × VDDQ
Units
V
V
V
V
Notes
1
1
1, 2
1, 3, 4
Notes: 1. All voltages referenced to VSS (GND).
2. During normal operation, VDDQ must not exceed VDD.
3. Typically the value of VREF is expected to be 0.5x VDDQ of the transmitting device. VREF is
expected to track variations in VDDQ.
4. Peak to peak AC noise on VREF must not exceed 2% VREF(DC).
pdf: 09005aef81121545/source: 09005aef810c0ffc
256Mbx16x32RLDRAM_2.fm - Rev F 8/05 EN
35
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©2001 Micron Technology, Inc. All rights reserved.
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