W9425G6JH-5 Winbond Electronics, W9425G6JH-5 Datasheet - Page 31

• Manufacturer Part Number: W9425G6JH-5
• Description: IC DDR-400 SDRAM 256MB 66TSSOPII
• Manufacturer: Winbond Electronics

Specifications of W9425G6JH-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
The area between the undershoot signal and GND must be less than
The area between the overshoot signal and VDD must be less than
-1
-2
-3
-4
-5
5
4
3
2
1
0
Maximum peak amplitude allowed for undershoot
Maximum peak amplitude allowed for overshoot
0
Figure 4: DQ/DM/DQS AC Overshoot and Undershoot Definition
or equal to Max. area in Figure 4
or equal to Max. area in Figure 4
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
Max. amplitude = 1.2V
PARAMETER
Max. area
VDD
Overshoot
- 31 -
Time (nS)
Publication Release Date: May 26, 2010
1.44 V-nS
1.44 V-nS
DDR500
Max. amplitude = 1.2V
1.2 V
1.2 V
SPECIFICATION
Undershoot
W9425G6JH
GND
1.44 V-nS
1.44 V-nS
DDR400
Revision A01
1.2 V
1.2 V