W9825G2JB Datasheet, PDF (3/41 Pages) Winbond – 2M  4 BANKS  32BITS SDRAM

W9825G2JB
1. GENERAL DESCRIPTION
W9825G2JB is a high-speed synchronous dynamic random access memory (SDRAM), organized as
2,097,152 words  4 banks  32 bits. W9825G2JB delivers a data bandwidth of up to 166M words per
second. For different application, W9825G2JB is sorted into two speed grades: -6, -75. The -6/-6I is
compliant to the 166MHz/CL3 specification, (the -6I grade which is guaranteed to support -40°C ~
85°C) ,the -75/75I is compliant to the PC133/CL3 specification (the 75I grade which is guaranteed to
support -40°C ~ 85°C).
Accesses to the SDRAM are burst oriented. Consecutive memory location in one page can be
accessed at a burst length of 1, 2, 4, 8 or full page when a bank and row is selected by an ACTIVE
command. Column addresses are automatically generated by the SDRAM internal counter in burst
operation. Random column read is also possible by providing its address at each clock cycle. The
multiple bank nature enables interleaving among internal banks to hide the precharging time.
By having a programmable Mode Register, the system can change burst length, latency cycle,
interleave or sequential burst to maximize its performance. W9825G2JB is ideal for main memory in
high performance applications.
2. FEATURES
 3.3V  0.3V for -6 speed grades power supply
 2.7V~3.6V for -6I/-75/75I speed grades power supply
 Up to 166 MHz Clock Frequency
 2,097,152 Words  4 banks  32 bits organization
 Self Refresh Mode: Standard and Low Power
 CAS Latency: 2 and 3
 Burst Length: 1, 2, 4, 8 and full page
 Burst Read, Single Writes Mode
 Byte Data Controlled by DQM
 Auto-precharge and Controlled Precharge
 4K Refresh cycles / 64 mS
 Interface: LVTTL
 Package: 90 Balls TFBGA, using Lead free materials with RoHS compliant
 Dual-Die package
3. AVAILABLE PART NUMBER
PART NUMBER
W9825G2JB-6
W9825G2JB-6I
W9825G2JB-75
W9825G2JB75I
SPEED GRADE
166MHz/CL3
166MHz/CL3
133MHz/CL3
133MHz/CL3
SELF REFRESH
CURRENT (MAX)
4 mA
4 mA
4 mA
4 mA
OPERATING
TEMPERATURE
0°C ~ 70°C
-40°C ~ 85°C
0°C ~ 70°C
-40°C ~ 85°C
-3-
Publication Release Date: Apr. 11, 2011
Revision A01