hy5ps1g821m Hynix Semiconductor, hy5ps1g821m Datasheet - Page 58

• Manufacturer Part Number: hy5ps1g821m
• Description: 1gb Ddr2 Sdram
• Manufacturer: Hynix Semiconductor

Rev. 0.2 / Oct. 2005
4. Operating Conditions
4.1 Absolute Maximum DC Ratings
4.2 Operating Temperature Condition
1.
1. Operating Temperature is the case surface temperature on the center/top side of the DRAM. For the measurement conditions,
2. The operatin temperature range are the temperature where all DRAM specification will be supported. Outside of this temperature
V
Symbol
Symbol
VDDQ
VDDL
Toper
IN
VDD
T
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 reli-
ability.
please refer to JESD51-2 standard.
rang, even it is still within the limit of stress condition, some deviation on portion of operation specification may be required. During
operation, the DRAM case temperature must be maintained between 0 ~ 85°C under all other specification parameters. However,
in some applications, it is desirable to operate the DRAM up to 95°C case temperature. Therefore 2 spec options may exist.
1) Supporting 0 - 85°C with full JEDEC AC & DC specifications. This is the minimum requirements for all oprating temperature options.
2) Supporting 0 - 85°C and being able to extend to 95°C with doubling auto-refresh commands in frequency to a 32 ms
Note; Self-refresh period within the above DRAM is hard coded at 64ms(tREFI= 7.8us). Therfore, it is imperative that the system ensures
,
STG
V
OUT
period(tRFI=3.9us).
the DRAM is at or below 85°C case temperature before initiating self-refresh operation.
Voltage on VDD pin relative to Vss
Voltage on VDDQ pin relative to Vss
Voltage on VDDL pin relative to Vss
Voltage on any pin relative to Vss
Storage Temperature
Operating Temperature
Parameter
Parameter
- 1.0 V ~ 2.3 V
- 0.5 V ~ 2.3 V
- 0.5 V ~ 2.3 V
- 0.5 V ~ 2.3 V
-55 to +100
0 to 85
Rating
Rating
1HY5PS12421(L)M
HY5PS12821(L)M
Units
Units
°C
°C
V
V
V
V
Notes
Notes
1,2
1
1
1
1
1
58