Rainbow Electronics W9825G6CH - Manual

W9825G6CH
4M
××
4 BANKS
××
16 BIT SDRAM
Publication Release Date: Oct 2004
- 1 - Revision A2
GENERAL DESCRIPTION
W9825G6CH is a high-speed synchronous dynamic random access memory (SDRAM), organized as
4M words
×
4 banks
×
16 bits. Using pipelined architecture and 0.13
µ
m process technology,
W9825G6CH delivers a data bandwidth of up to 166M words per second (-6). To fully comply with the
personal computer industrial standard, W9825G6CH is sorted into two speed grades: -6, -7 and -75.
The -6 is compliant to the 166 MHz/CL3 specification, the -7 is compliant to the 143 MHz/CL3 or
PC133/CL2 specification, the -75 is compliant to the PC133/CL3 specification, for handheld device
application, we also provide a low power option, the 75L grade, with Self Refresh Current under 1mA.,
and an industrial temperature option, the grade of 75I, which is guranteed 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. W9825G6CH is ideal for main memory in
high performance applications.
FEATURES
• 3.3V
±
0.3V Power Supply
• Up to 166 MHz Clock Frequency
• 4,194,304 Words
×
4 Banks
×
16 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 LDQM, UDQM
• Power-down Mode
• Auto-precharge and Controlled Precharge
• 8K Refresh Cycles/64 mS
• Interface: LVTTL
• Packaged in TSOP II 54-pin, 400 mil - 0.80, using PB free material.
AVAILABLE PART NUMBER
Part Number Speed Grade Self Refresh Current (Max) Operating Temperature
W9825G6CH- 6 PC166/CL3 3mA 0°C - 70°C
W9825G6CH- 7 PC133/CL2 3mA 0°C - 70°C
W9825G6CH-75 PC133/CL3 3mA 0°C - 70°C
W9825G6CH75L PC133/CL3 1mA 0°C - 70°C
W9825G6CH75I PC133/CL3 1mA -40°C - 85°C