w9425g8dh Winbond Electronics Corp America, w9425g8dh Datasheet - Page 2

• Manufacturer Part Number: w9425g8dh
• Description: 8m ? 4 Banks ? 8 Bits Ddr Sdram
• Manufacturer: Winbond Electronics Corp America

8.
9.
10. SYSTEM CHARACTERISTICS FOR DDR SDRAM ..................................................................... 30
11. TIMING WAVEFORMS.................................................................................................................. 35
OPERATION MODE...................................................................................................................... 17
8.1
8.2
8.3
8.4
ELECTRICAL CHARACTERISTICS ............................................................................................. 23
9.1
9.2
9.3
9.4
9.5
9.6
9.7
10.1 Table 1: Input Slew Rate for DQ, DQS, and DM................................................................. 30
10.2 Table 2: Input Setup & Hold Time Derating for Slew Rate.................................................. 30
10.3 Table 3: Input/Output Setup & Hold Time Derating for Slew Rate...................................... 30
10.4 Table 4: Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate ...................... 30
10.5 Table 5: Output Slew Rate Characteristics (X8 Devices only) ............................................ 30
10.6 Table 6: Output Slew Rate Matching Ratio Characteristics ................................................ 31
10.7 Table 7: AC Overshoot/Undershoot Specification for Address and Control Pins ............... 31
10.8 Table 8: Overshoot/Undershoot Specification for Data, Strobe, and Mask Pins ................ 32
10.9 System Notes: ..................................................................................................................... 33
11.1 Command Input Timing ....................................................................................................... 35
11.2 Timing of the CLK Signals................................................................................................... 35
11.3 Read Timing (Burst Length = 4) .......................................................................................... 36
11.4 Write Timing (Burst Length = 4) .......................................................................................... 37
11.5 DM, DATA MASK (W9425G8DH) ....................................................................................... 38
11.6 Mode Register Set (MRS) Timing ....................................................................................... 39
11.7 Extend Mode Register Set (EMRS) Timing......................................................................... 40
7.10.2
7.10.3
7.10.4
7.10.5
7.10.6
7.10.7
Simplified Truth Table.......................................................................................................... 17
Function Truth Table ........................................................................................................... 18
Function Truth Table for CKE.............................................................................................. 21
Simplified Stated Diagram................................................................................................... 22
Absolute Maximum Ratings................................................................................................. 23
Recommended DC Operating Conditions ........................................................................... 23
Capacitance......................................................................................................................... 24
Leakage and Output Buffer Characteristics ........................................................................ 24
DC Characteristics............................................................................................................... 25
AC Characteristics and Operating Condition....................................................................... 26
AC Test Conditions.............................................................................................................. 28
Addressing Mode Select (A3)...............................................................................................14
CAS Latency field (A6 to A4)................................................................................................16
DLL Reset bit (A8) ................................................................................................................16
Mode Register /Extended Mode register change bits (BS0, BS1) ........................................16
Extended Mode Register field ..............................................................................................16
Reserved field ......................................................................................................................16
- 2 -
Publication Release Date: Nov. 20
Revision A4
,
2007