W9725G6KB25I-TR Datasheet, PDF (2/87 Pages) Winbond – 4M X 4 BANKS X 16 BIT DDR2 SDRAM

W9725G6KB
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
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.
9.1
9.2
9.3
9.4
9.5
OPERATION MODE ...........................................................................................................................31
Command Truth Table ........................................................................................................................31
Clock Enable (CKE) Truth Table for Synchronous Transitions............................................................32
Data Mask (DM) Truth Table...............................................................................................................32
Function Truth Table ...........................................................................................................................33
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 ...........................................................................................38
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 speed grade ...................................43
10.11.2
AC Characteristics and Operating Condition for -25/25I/25A/25K/-3 speed grade...........45
10.12
AC Input Test Conditions...........................................................................................................66
10.13
10.14
Differential Input/Output AC Logic Levels ..................................................................................66
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
Publication Release Date: Sep. 03, 2012
-2-
Revision A03