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W9425G6JH Datasheet Preview

W9425G6JH Datasheet

4M X 4 BANKS X 16 BITS DDR SDRAM

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W9425G6JH
4 M × 4 BANKS × 16 BITS DDR SDRAM
Table of Contents-
1. GENERAL DESCRIPTION.............................................................................................................................4
2. FEATURES ....................................................................................................................................................4
3. KEY PARAMETERS ......................................................................................................................................5
4. PIN CONFIGURATION ..................................................................................................................................6
5. PIN DESCRIPTION........................................................................................................................................7
6. BLOCK DIAGRAM .........................................................................................................................................8
7. FUNCTIONAL DESCRIPTION.......................................................................................................................9
7.1 Power Up Sequence ..........................................................................................................................9
7.2 Command Function ..........................................................................................................................10
7.2.1 Bank Activate Command ......................................................................................................10
7.2.2 Bank Precharge Command ..................................................................................................10
7.2.3 Precharge All Command ......................................................................................................10
7.2.4 Write Command ...................................................................................................................10
7.2.5 Write with Auto-precharge Command...................................................................................10
7.2.6 Read Command ...................................................................................................................10
7.2.7 Read with Auto-precharge Command ..................................................................................10
7.2.8 Mode Register Set Command ..............................................................................................11
7.2.9 Extended Mode Register Set Command ..............................................................................11
7.2.10 No-Operation Command ......................................................................................................11
7.2.11 Burst Read Stop Command..................................................................................................11
7.2.12 Device Deselect Command ..................................................................................................11
7.2.13 Auto Refresh Command .......................................................................................................11
7.2.14 Self Refresh Entry Command...............................................................................................12
7.2.15 Self Refresh Exit Command .................................................................................................12
7.2.16 Data Write Enable /Disable Command .................................................................................12
7.3 Read Operation ................................................................................................................................12
7.4 Write Operation ................................................................................................................................13
7.5 Precharge.........................................................................................................................................13
7.6 Burst Termination .............................................................................................................................13
7.7 Refresh Operation ............................................................................................................................13
7.8 Power Down Mode ...........................................................................................................................14
7.9 Input Clock Frequency Change during Precharge Power Down Mode ............................................14
7.10 Mode Register Operation .................................................................................................................14
7.10.1 Burst Length field (A2 to A0) ................................................................................................14
7.10.2 Addressing Mode Select (A3)...............................................................................................15
Publication Release Date: May 26, 2010
- 1 - Revision A01
Datasheet pdf - http://www.DataSheet4U.net/




Winbond

W9425G6JH Datasheet Preview

W9425G6JH Datasheet

4M X 4 BANKS X 16 BITS DDR SDRAM

No Preview Available !

www.DataSheet.co.kr
W9425G6JH
7.10.3 CAS Latency field (A6 to A4)................................................................................................16
7.10.4 DLL Reset bit (A8) ................................................................................................................16
7.10.5 Mode Register /Extended Mode register change bits (BA0, BA1) ........................................16
7.10.6 Extended Mode Register field ..............................................................................................16
7.10.7 Reserved field ......................................................................................................................16
8. OPERATION MODE ....................................................................................................................................17
8.1 Simplified Truth Table ......................................................................................................................17
8.2 Function Truth Table ........................................................................................................................18
8.3 Function Truth Table for CKE...........................................................................................................21
8.4 Simplified Stated Diagram ................................................................................................................22
9. ELECTRICAL CHARACTERISTICS ............................................................................................................23
9.1 Absolute Maximum Ratings..............................................................................................................23
9.2 Recommended DC Operating Conditions ........................................................................................23
9.3 Capacitance .....................................................................................................................................24
9.4 Leakage and Output Buffer Characteristics......................................................................................24
9.5 DC Characteristics ...........................................................................................................................25
9.6 AC Characteristics and Operating Condition ....................................................................................26
9.7 AC Test Conditions ..........................................................................................................................27
10. SYSTEM CHARACTERISTICS FOR DDR SDRAM.....................................................................................29
10.1 Table 1: Input Slew Rate for DQ, DQS, and DM ..............................................................................29
10.2 Table 2: Input Setup & Hold Time Derating for Slew Rate ...............................................................29
10.3 Table 3: Input/Output Setup & Hold Time Derating for Slew Rate....................................................29
10.4 Table 4: Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate ....................................29
10.5 Table 5: Output Slew Rate Characteristics (X16 Devices only)........................................................29
10.6 Table 6: Output Slew Rate Matching Ratio Characteristics ..............................................................30
10.7 Table 7: AC Overshoot/Undershoot Specification for Address and Control Pins..............................30
10.8 Table 8: Overshoot/Undershoot Specification for Data, Strobe, and Mask Pins...............................31
10.9 System Notes: ..................................................................................................................................32
11. TIMING WAVEFORMS ................................................................................................................................34
11.1 Command Input Timing ....................................................................................................................34
11.2 Timing of the CLK Signals ................................................................................................................34
11.3 Read Timing (Burst Length = 4) .......................................................................................................35
11.4 Write Timing (Burst Length = 4) .......................................................................................................36
11.5 DM, DATA MASK (W9425G6JH) .....................................................................................................37
11.6 Mode Register Set (MRS) Timing.....................................................................................................38
11.7 Extend Mode Register Set (EMRS) Timing ......................................................................................39
11.8 Auto-precharge Timing (Read Cycle, CL = 2) ..................................................................................40
11.9 Auto-precharge Timing (Read cycle, CL = 2), continued..................................................................41
11.10 Auto-precharge Timing (Write Cycle) ...............................................................................................42
Publication Release Date: May 26, 2010
- 2 - Revision A01
Datasheet pdf - http://www.DataSheet4U.net/


Part Number W9425G6JH
Description 4M X 4 BANKS X 16 BITS DDR SDRAM
Maker Winbond
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