900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






Winbond

W9725G6KB Datasheet Preview

W9725G6KB Datasheet

4M x 4-BANKS x 16-BIT DDR2 SDRAM

No Preview Available !

W9751G6KB
8M 4 BANKS 16 BIT DDR2 SDRAM
Table of Contents-
1. GENERAL DESCRIPTION...................................................................................................................................4
2. FEATURES ..........................................................................................................................................................4
3. ORDER INFORMATION ......................................................................................................................................5
4. KEY PARAMETERS ............................................................................................................................................5
5. BALL CONFIGURATION .....................................................................................................................................6
6. BALL DESCRIPTION ...........................................................................................................................................7
7. BLOCK DIAGRAM ...............................................................................................................................................8
8. FUNCTIONAL DESCRIPTION.............................................................................................................................9
8.1 Power-up and Initialization Sequence .........................................................................................................9
8.2 Mode Register and Extended Mode Registers Operation .........................................................................10
8.2.1 Mode Register Set Command (MRS) ............................................................................................10
8.2.2 Extend Mode Register Set Commands (EMRS)............................................................................11
8.2.2.1 Extend Mode Register Set Command (1), EMR (1)............................................................11
8.2.2.2 DLL Enable/Disable............................................................................................................12
8.2.2.3 Extend Mode Register Set Command (2), EMR (2)............................................................13
8.2.2.4 Extend Mode Register Set Command (3), EMR (3)............................................................14
8.2.3 Off-Chip Driver (OCD) Impedance Adjustment..............................................................................15
8.2.3.1 Extended Mode Register for OCD Impedance Adjustment ................................................16
8.2.3.2 OCD Impedance Adjust......................................................................................................16
8.2.3.3 Drive Mode .........................................................................................................................17
8.2.4 On-Die Termination (ODT) ............................................................................................................18
8.2.5 ODT related timings ......................................................................................................................18
8.2.5.1 MRS command to ODT update delay.................................................................................18
8.3 Command Function ...................................................................................................................................20
8.3.1 Bank Activate Command ...............................................................................................................20
8.3.2 Read Command ............................................................................................................................20
8.3.3 Write Command ............................................................................................................................21
8.3.4 Burst Read with Auto-precharge Command ..................................................................................21
8.3.5 Burst Write with Auto-precharge Command ..................................................................................21
8.3.6 Precharge All Command ...............................................................................................................21
8.3.7 Self Refresh Entry Command........................................................................................................21
8.3.8 Self Refresh Exit Command ..........................................................................................................22
8.3.9 Refresh Command ........................................................................................................................22
8.3.10 No-Operation Command .............................................................................................................23
8.3.11 Device Deselect Command .........................................................................................................23
8.4 Read and Write access modes..................................................................................................................23
8.4.1 Posted CAS .................................................................................................................................23
8.4.1.1 Examples of posted CAS operation.................................................................................23
8.4.2 Burst mode operation ....................................................................................................................24
8.4.3 Burst read mode operation ............................................................................................................25
8.4.4 Burst write mode operation............................................................................................................25
8.4.5 Write data mask ............................................................................................................................26
8.5 Burst Interrupt............................................................................................................................................26
8.6 Precharge operation ..................................................................................................................................27
Publication Release Date: Aug. 15, 2014
Revision: A07
-1-




Winbond

W9725G6KB Datasheet Preview

W9725G6KB Datasheet

4M x 4-BANKS x 16-BIT DDR2 SDRAM

No Preview Available !

W9751G6KB
8.6.1 Burst read operation followed by precharge ..................................................................................27
8.6.2 Burst write operation followed by precharge..................................................................................27
8.7 Auto-precharge operation..........................................................................................................................27
8.7.1 Burst read with Auto-precharge.....................................................................................................28
8.7.2 Burst write with Auto-precharge ....................................................................................................28
8.8 Refresh Operation .....................................................................................................................................29
8.9 Power Down Mode ....................................................................................................................................29
8.9.1 Power Down Entry.........................................................................................................................30
8.9.2 Power Down Exit ...........................................................................................................................30
8.10 Input clock frequency change during precharge power down..................................................................30
9. OPERATION MODE ..........................................................................................................................................31
9.1 Command Truth Table...............................................................................................................................31
9.2 Clock Enable (CKE) Truth Table for Synchronous Transitions ..................................................................32
9.3 Data Mask (DM) Truth Table .....................................................................................................................32
9.4 Function Truth Table .................................................................................................................................33
9.5 Simplified Stated Diagram .........................................................................................................................36
10. ELECTRICAL CHARACTERISTICS ................................................................................................................37
10.1 Absolute Maximum Ratings .....................................................................................................................37
10.2 Operating Temperature Condition ...........................................................................................................37
10.3 Recommended DC Operating Conditions ...............................................................................................37
10.4 ODT DC Electrical Characteristics...........................................................................................................38
10.5 Input DC Logic Level ...............................................................................................................................38
10.6 Input AC Logic Level ...............................................................................................................................38
10.7 Capacitance ............................................................................................................................................39
10.8 Leakage and Output Buffer Characteristics.............................................................................................39
10.9 DC Characteristics...................................................................................................................................40
10.10 IDD Measurement Test Parameters ......................................................................................................42
10.11 AC Characteristics.................................................................................................................................43
10.11.1 AC Characteristics and Operating Condition for -18/18I speed grade.......................................43
10.11.2 AC Characteristics and Operating Condition for -25/25L/25I/-3 speed grade............................45
10.12 AC Input Test Conditions.......................................................................................................................66
10.13 Differential Input/Output AC Logic Levels..............................................................................................66
10.14 AC Overshoot / Undershoot Specification .............................................................................................67
10.14.1 AC Overshoot / Undershoot Specification for Address and Control Pins: .................................67
10.14.2 AC Overshoot / Undershoot Specification for Clock, Data, Strobe and Mask pins: ...................67
11. TIMING WAVEFORMS ....................................................................................................................................68
11.1 Command Input Timing ...........................................................................................................................68
11.2 ODT Timing for Active/Standby Mode .....................................................................................................69
11.3 ODT Timing for Power Down Mode.........................................................................................................69
11.4 ODT Timing mode switch at entering power down mode ........................................................................70
11.5 ODT Timing mode switch at exiting power down mode...........................................................................71
11.6 Data output (read) timing.........................................................................................................................72
11.7 Burst read operation: RL=5 (AL=2, CL=3, BL=4) ....................................................................................72
11.8 Data input (write) timing...........................................................................................................................73
11.9 Burst write operation: RL=5 (AL=2, CL=3, WL=4, BL=4).........................................................................73
11.10 Seamless burst read operation: RL = 5 ( AL = 2, and CL = 3, BL = 4) ..................................................74
11.11 Seamless burst write operation: RL = 5 ( WL = 4, BL = 4).....................................................................74
11.12 Burst read interrupt timing: RL =3 (CL=3, AL=0, BL=8).........................................................................75
11.13 Burst write interrupt timing: RL=3 (CL=3, AL=0, WL=2, BL=8) ..............................................................75
11.14 Write operation with Data Mask: WL=3, AL=0, BL=4) ...........................................................................76
Publication Release Date: Aug. 15, 2014
Revision: A07
-2-


Part Number W9725G6KB
Description 4M x 4-BANKS x 16-BIT DDR2 SDRAM
Maker Winbond
PDF Download

W9725G6KB Datasheet PDF






Similar Datasheet

1 W9725G6KB 4M x 4-BANKS x 16-BIT DDR2 SDRAM
Winbond





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy