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GSI Technology - (GS8170LW36C / GS8170LW72C) Late Write SigmaRAM

Numéro de référence GS8170LW36C-333
Description (GS8170LW36C / GS8170LW72C) Late Write SigmaRAM
Fabricant GSI Technology 
Logo GSI Technology 





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GS8170LW36C-333 fiche technique
GS8170LW36/72C-333/300/250/200
209-Bump BGA
Commercial Temp
Industrial Temp
18Mb Σ1x1Lp CMOS I/O
Late Write SigmaRAM™
200 MHz–333 MHz
1.8 V VDD
1.8 V I/O
Features
• Late Write mode, Pipelined Read mode
• JEDEC-standard SigmaRAMpinout and package
• 1.8 V +150/–100 mV core power supply
• 1.8 V CMOS Interface
• ZQ controlled user-selectable output drive strength
• Dual Cycle Deselect
• Burst Read and Write option
• Fully coherent read and write pipelines
• Echo Clock outputs track data output drivers
• Byte write operation (9-bit bytes)
• 2 user-programmable chip enable inputs
• IEEE 1149.1 JTAG-compliant Serial Boundary Scan
• 209-bump, 14 mm x 22 mm, 1 mm bump pitch BGA package
• Pin-compatible with future 36Mb, 72Mb, and 144Mb
devices
Functional Description
SigmaRAM Family Overview
GS8170LW36/72 SigmaRAMs are built in compliance with
the SigmaRAM pinout standard for synchronous SRAMs.
They are 18,874,368-bit (18Mb) SRAMs. This family of wide,
very low voltage CMOS I/O SRAMs is designed to operate at
the speeds needed to implement economical high performance
networking systems.
ΣRAMs are offered in a number of configurations including
Late Write, Double Late Write, and Double Data Rate (DDR).
The logical differences between the protocols employed by
these RAMs mainly involve various approaches to write
cueing and data transfer rates. The ΣRAMfamily standard
allows a user to implement the interface protocol best suited to
the task at hand.
Bottom View
209-Bump, 14 mm x 22 mm BGA
1 mm Bump Pitch, 11 x 19 Bump Array
Becausewww.DataSheet.co.kr SigmaRAMs are synchronous devices, address data
inputs and read/write control inputs are captured on the rising
edge of the input clock. Write cycles are internally self-timed
and initiated by the rising edge of the clock input. This feature
eliminates complex off-chip write pulse generation required by
asynchronous SRAMs and simplifies input signal timing.
ΣRAMs support pipelined reads utilizing a rising-edge-
triggered output register. They also utilize a Dual Cycle
Deselect (DCD) output deselect protocol.
ΣRAMs are implemented with high performance CMOS
technology and are packaged in a 209-bump BGA.
Parameter Synopsis
Key Fast Bin Specs
Symbol
Cycle Time
tKHKH
Access Time
tKHQV
- 333
3.0 ns
1.6 ns
Rev: 2.03 1/2005
1/27
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology, Inc.
Datasheet pdf - http://www.DataSheet4U.net/

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