W9425G6EH-5 Winbond Electronics, W9425G6EH-5 Datasheet - Page 33

• Manufacturer Part Number: W9425G6EH-5
• Description: IC DDR-400 SDRAM 256MB 66TSSOPII
• Manufacturer: Winbond Electronics

Specifications of W9425G6EH-5

• Format - Memory: RAM
• Memory Type: DDR SDRAM
• Memory Size: 256M (16Mx16)
• Speed: 250MHz
• Interface: Parallel
• Voltage - Supply: 2.3 V ~ 2.7 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 66-TSOPII
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.8 Table 8: Overshoot/Undershoot Specification for Data, Strobe, and Mask Pins
must be less than or equal to Max. area in Figure 4
must be less than or equal to Max. area in Figure 4
The area between the undershoot signal and GND
Maximum peak amplitude allowed for undershoot
The area between the overshoot signal and VDD
Maximum peak amplitude allowed for overshoot
-1
-2
-3
-4
-5
5
4
3
2
1
0
0
Figure 4: DQ/DM/DQS AC Overshoot and Undershoot Definition
0.5 1.0 1.42 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 5.68 6.0 6.5 7.0
PARAMETER
Max. amplitude = 1.2V
Max. area
VDD
Overshoot
- 33 -
Time (nS)
1.44 V-nS
1.44 V-nS
DDR500
1.2 V
1.2 V
Publication Release Date:Dec. 03, 2008
SPECIFICATION
Max. amplitude = 1.2V
1.44 V-nS
1.44 V-nS
DDR400
1.2 V
1.2 V
Undershoot
W9425G6EH
GND
2.25 V-nS
2.25 V-nS
DDR333
Revision A08
1.2 V
1.2 V