144Mb SigmaQuad-II+ Burst of 4 SRAM
Description
GS81302D06/11/20/38E-500/450/400/350
165-Bump BGA Commercial Temp Industrial Temp
144Mb SigmaQuad-II+ Burst of 4 SRAM
500 MHz–350 MHz 1.
8 V VDD
1.
8 V or 1.
5 V I/O
Features
• 2.
5 Clock Latency • Simultaneous Read and Write SigmaQuad™ Interface • JEDEC-standard pinout and package • Dual Double Data Rate interface • Byte Write controls sampled at data-in time • Burst of 4 Read and Write • On-Die Termination (ODT) on Data (D), Byte Write (BW),
and Clock (K, K) intputs • 1.
8 V +100/–100 mV core power supply • 1.
5 V or 1.
8 V HSTL Interface • Pipelined read operation • Fully coherent read and write pipelines • ZQ pin for programmable output drive strength • Data Valid Pin (QVLD) Support • IEEE 1149.
1 JTAG-compliant Boundary Scan • 165-bump, 15 mm x 17 mm, 1 mm bump pitch BGA package • RoHS-compliant 165-bump BGA package available
SigmaQuad™ Family Overview
The GS81302D06/11/20/38E are built in compliance with the SigmaQuad-II+ SRAM pinout standard for Separate I/O synchronous SRAMs.
They are 150,994,944-bit (144Mb) SRAMs.
The GS81302D06/11/20/38E SigmaQuad SRAMs
are just one element in a family of low power, low voltage HSTL I/O SRAMs designed to operate at the speeds needed to implement economical high performance networking systems.
Clocking and Addressing Schemes
The GS81302D06/11/20/38E SigmaQuad-II+ SRAMs are synchronous devices.
They employ two input register clock inputs, K and K.
K and K are independent single-ended clock inputs, not differential inputs to a single differential clock input buffer.
Each internal read and write operation in a SigmaQuad-II+ B4 RAM is four times wider than the device I/O bus.
An input data bus de-multiplexer is used to accumulate incoming data before it is simultaneously written to the memory array.
An output data multiplexer is used to capture the data produced from a single memory array read and then route it to the appropriate output drivers as needed.
Therefore the address field of a SigmaQuad-II+ B4 RAM is always two address ...
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