W9725G6IB-25 Winbond Electronics, W9725G6IB-25 Datasheet - Page 64

• Manufacturer Part Number: W9725G6IB-25
• Description: IC DDR2-800 SDRAM 256MB 84-WBGA
• Manufacturer: Winbond Electronics

Specifications of W9725G6IB-25

• Format - Memory: RAM
• Memory Type: DDR2 SDRAM
• Memory Size: 256M (16Mx16)
• Speed: 2.5ns
• Interface: Parallel
• Voltage - Supply: 1.7 V ~ 1.9 V
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 84-WBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.14 AC Overshoot / Undershoot Specification
9.14.1 AC Overshoot / Undershoot Specification for Address and Control Pins:
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for undershoot area
Maximum overshoot area above V
Maximum undershoot area below V
9.14.2 AC Overshoot / Undershoot Specification for Clock, Data, Strobe and Mask pins:
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for undershoot area
Maximum overshoot area above V
Maximum undershoot area below V
Applies to DQ, LDQS, /LDQS, UDQS, /UDQS, LDM, UDM, CLK, /CLK
Applies to A0-A12, BA0-BA1, /CS, /RAS, /CAS, /WE, CKE, ODT
PARAMETER
PARAMETER
Volts (V)
Figure 29—AC overshoot and undershoot definition
DD
DDQ
V
V
SS
SSQ
SS
DD
/V
/V
SSQ
DDQ
Maximum Amplitude
Maximum Amplitude
- 64 -
Time (nS)
0.66
0.66
0.23
0.23
−25
−25
0.5
0.5
0.5
0.5
Publication Release Date: Oct. 23, 2009
Undershoot Area
Overshoot Area
0.23
0.23
0.5
0.5
0.8
0.8
0.5
0.5
−3
−3
W9725G6IB
Revision A04
UNIT
UNIT
V-nS
V-nS
V-nS
V-nS
V
V
V
V