器件名称: AS7C251MFT32A-85TQI
功能描述: 2.5V 1M x 32/36 Flow-through synchronous SRAM
文件大小: 520.67KB 共19页
简 介:January 2005
AS7C251MFT32A AS7C251MFT36A
2.5V 1M × 32/36 Flow-through synchronous SRAM
Features
Organization: 1,048,576 words × 32 or 36 bits Fast clock to data access: 7.5/8.5/10 ns Fast OE access time: 3.5/4.0 ns Fully synchronous flow-through operation Asynchronous output enable control Available in 100-pin TQFP package Individual byte write and global write Multiple chip enables for easy expansion 2.5V core power supply Linear or interleaved burst control Snooze mode for reduced power-standby Common data inputs and data outputs
Logic block diagram
LBO CLK ADV ADSC ADSP A[19:0] 20 CLK CE CLR Q0 Burst logic Q1
2 2
D Q CE Address register CLK D DQd Q Byte write registers CLK D DQ Q c Byte write registers CLK D DQb Q Byte write registers CLK D DQa Q Byte write registers CLK D Enable CE register CLK Q
1M × 32/36 Memory array
20
18
20 32/36 32/36
GWE BWE BWd
BWc
BWb
BWa CE0 CE1 CE2
4
OE Output registers CLK
Input registers CLK
ZZ
Power down
D Enable Q delay register CLK 32/36 DQ[a:d]
OE
Selection guide
Minimum cycle time Maximum clock access time Maximum operating current Maximum standby current Maximum CMOS standby current (DC)
-75 8.5 7.5 325 130 90
-85 10 8.5 300 130 90
-10 12 10 275 130 90
Units ns ns mA mA mA
1/17/05, v 1.2
Alliance Semiconductor
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Copyright Alliance Semiconductor. All rights reserved.
AS7C251MFT32A AS7C251MFT36A
2.5V 32 Mb Synchronous SRAM products list1,2
Org 2MX18 1MX32 1MX36 2MX18 1MX32 1MX36 2MX18 1MX……
