144Mb SigmaDDR-II+ Burst of 2 SRAM
Description
GS81302T07/10/19/37E-450/400/350/333/300
165-Bump BGA Commercial Temp Industrial Temp
144Mb SigmaDDRTM-II+ Burst of 2 SRAM
450 MHz–300 MHz 1.
8 V VDD
1.
8 V or 1.
5 V I/O
Features
• 2.
0 Clock Latency • Simultaneous Read and Write SigmaDDR™ Interface • Common I/O bus • JEDEC-standard pinout and package • Double Data Rate interface • Byte Write controls sampled at data-in time • Burst of 2 Read and Write • On-Die Termination (ODT) on Data (D), Byte Write (BW),
and Clock (K, K) inputs • 1.
8 V +100/–100 mV core power supply • 1.
5 V or 1.
8 V HSTL Interface • Pipelined read operation with self-timed Late Write • 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
SigmaDDR™ Family Overview
The GS81302T07/10/19/37E are built in compliance with the SigmaDDR-II+ SRAM pinout standard for Common I/O synchronous SRAMs.
They are 150,994,944-bit (144Mb)
SRAMs.
The GS81302T07/10/19/37E SigmaDDR-II+ 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 GS81302T07/10/19/37E SigmaDDR-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 SigmaDDR-II+ B2 RAM is two 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 Sigm...
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