W9812G2GH Datasheet, PDF(16/42 Page) Winbond – a high-speed synchronous dynamic random access memory (SDRAM), organized as 1,048,576 words × 4 banks × 32 bits

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W9812G2GH Datasheet, PDF (16/42 Pages) Winbond – a high-speed synchronous dynamic random access memory (SDRAM), organized as 1,048,576 words × 4 banks × 32 bits

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W9812G2GH

Notes:

1. Operation exceeds âAbsolute Maximum Ratingsâ may cause permanent damage to the devices.

2. All voltages are referenced to VSS

3. These parameters depend on the cycle rate and listed values are measured at a cycle rate with the

minimum values of tCK and tRC.

4. These parameters depend on the output loading conditions. Specified values are obtained with

output open.

5. Power up sequence is further described in the âFunctional Descriptionâ section.

6. AC Testing Conditions

PARAMETER

Output Reference Level

Output Load

Input Signal Levels (VIH/VIL)

Transition Time (tT: tr/tf) of Input Signal

Input Reference Level

CONDITIONS

1.4V

See diagram below

2.4V/0.4V

1/1 nS

1.4V

output

Z = 50 ohms

1.4 V

50 ohms

30pF

AC TEST LOAD

7. Transition times are measured between VIH and VIL.

8. tHZ defines the time at which the outputs achieve the open circuit condition and is not referenced to

output level.

9. Assumed input rise and fall time (tT) = 1nS.

If tr & tf is longer than 1nS, transient time compensation should be considered,

i.e., [(tr + tf)/2-1]nS should be added to the parameter

(The tT maximum canât be more than 10nS for low frequency application.)

10. If clock rising time (tT) is longer than 1nS, (tT/2-0.5)nS should be added to the parameter.

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Publication Release Date: Aug. 13,2007

Revision A07

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