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GS882V36BD-250 데이터시트(PDF) 1 Page - GSI Technology |
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GS882V36BD-250 데이터시트(HTML) 1 Page - GSI Technology |
1 / 36 page GS882V18/36BB/D-333/300/250/200 512K x 18, 256K x 36 9Mb SCD/DCD Sync Burst SRAMs 333 MHz–200 MHz 1.8 V VDD 1.8 V I/O 119- and 165-Bump BGA Commercial Temp Industrial Temp Rev: 1.02 3/2005 1/36 © 2004, GSI Technology Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. Features • FT pin for user-configurable flow through or pipeline operation • Single/Dual Cycle Deselect selectable • IEEE 1149.1 JTAG-compatible Boundary Scan • On-chip read parity checking; even or odd selectable • ZQ mode pin for user-selectable high/low output drive • 1.8 V +10%/–10% core power supply • 1.8 V I/O supply • LBO pin for Linear or Interleaved Burst mode • Internal input resistors on mode pins allow floating mode pins • Default to SCD x18/x36 Interleaved Pipeline mode • Byte Write (BW) and/or Global Write (GW) operation • Internal self-timed write cycle • Automatic power-down for portable applications • JEDEC-standard 119- and 165-bump BGA packages • Pb-Free 119-bump and 165-bump packages available Functional Description Applications The GS882V18/36B is a 9,437,184-bit high performance synchronous SRAM with a 2-bit burst address counter. Although of a type originally developed for Level 2 Cache applications supporting high performance CPUs, the device now finds application in synchronous SRAM applications, ranging from DSP main store to networking chip set support. Controls Addresses, data I/Os, chip enable (E1), address burst control inputs (ADSP, ADSC, ADV), and write control inputs (Bx, BW, GW) are synchronous and are controlled by a positive-edge- triggered clock input (CK). Output enable (G) and power down control (ZZ) are asynchronous inputs. Burst cycles can be initiated with either ADSP or ADSC inputs. In Burst mode, subsequent burst addresses are generated internally and are controlled by ADV. The burst address counter may be configured to count in either linear or interleave order with the Linear Burst Order (LBO) input. The Burst function need not be used. New addresses can be loaded on every cycle with no degradation of chip performance. Flow Through/Pipeline Reads The function of the Data Output register can be controlled by the user via the FT mode . Holding the FT mode pin low places the RAM in Flow Through mode, causing output data to bypass the Data Output Register. Holding FT high places the RAM in Pipeline mode, activating the rising-edge-triggered Data Output Register. SCD and DCD Pipelined Reads The GS882V18/36B is a SCD (Single Cycle Deselect) and DCD (Dual Cycle Deselect) pipelined synchronous SRAM. DCD SRAMs pipeline disable commands to the same degree as read commands. SCD SRAMs pipeline deselect commands one stage less than read commands. SCD RAMs begin turning off their outputs immediately after the deselect command has been captured in the input registers. DCD RAMs hold the deselect command for one full cycle and then begin turning off their outputs just after the second rising edge of clock. The user may configure this SRAM for either mode of operation using the SCD mode input. Byte Write and Global Write Byte write operation is performed by using Byte Write enable (BW) input combined with one or more individual byte write signals (Bx). In addition, Global Write (GW) is available for writing all bytes at one time, regardless of the Byte Write control inputs. FLXDrive™ The ZQ pin allows selection between high drive strength (ZQ low) for multi-drop bus applications and normal drive strength (ZQ floating or high) point-to-point applications. See the Output Driver Characteristics chart for details. Sleep Mode Low power (Sleep mode) is attained through the assertion (High) of the ZZ signal, or by stopping the clock (CK). Memory data is retained during Sleep mode. Core and Interface Voltages The GS882V18/36B operates on a 2.5 V or 3.3 V power supply. All input are 3.3 V and 2.5 V compatible. Separate output power (VDDQ) pins are used to decouple output noise from the internal circuits and are 3.3 V and 2.5 V compatible. Paramter Synopsis -333 -300 -250 -200 Unit Pipeline 3-1-1-1 tKQ tCycle 2.5 3.0 2.5 3.3 2.5 4.0 3.0 5.0 ns ns Curr (x18) Curr (x32/x36) 245 275 225 250 195 220 165 185 mA mA Flow Through 2-1-1-1 tKQ tCycle 4.5 4.5 5.0 5.0 5.5 5.5 6.5 6.5 ns ns Curr (x18) Curr (x32/x36) 195 220 180 200 155 175 140 155 mA mA |
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