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GS8662D20BD-500 Datasheet(PDF) 1 Page - GSI Technology |
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GS8662D20BD-500 Datasheet(HTML) 1 Page - GSI Technology |
1 / 33 page GS8662D20/38BD-550/500/450/400/350 GS8662D06/11BD-500/450/400/350 72Mb SigmaQuad-II+TM Burst of 4 SRAM 550 MHz–350 MHz 1.8 V VDD 1.8 V or 1.5 V I/O 165-Bump BGA Commercial Temp Industrial Temp Rev: 1.02c 8/2017 1/33 © 2011, GSI Technology Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. 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, 13 mm x 15 mm, 1 mm bump pitch BGA package • RoHS-compliant 165-bump BGA package available SigmaQuad-II™ Family Overview The GS8662D06/11/20/38BD are built in compliance with the SigmaQuad-II+ SRAM pinout standard for Separate I/O synchronous SRAMs. They are 75,497,472-bit (72Mb) SRAMs. The GS8662D06/11/20/38BD 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 GS8662D06/11/20/38BD 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 pins less than the advertised index depth (e.g., the 8M x 8 has a 2M addressable index). Parameter Synopsis (x18/x36) -550 -500 -450 -400 -350 tKHKH 1.81 ns 2.0 ns 2.2 ns 2.5 ns 2.86 ns tKHQV 0.29ns 0.33 ns 0.37 ns 0.45 ns 0.45 ns Parameter Synopsis (x8/x9) -500 -450 -400 -350 tKHKH 2.0 ns 2.2 ns 2.5 ns 2.86 ns tKHQV 0.33 ns 0.37ns 0.45 ns 0.45 ns |
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