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GS8640Z18GT-300IT PDF预览

GS8640Z18GT-300IT

更新时间: 2024-09-25 13:08:03
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GSI 存储内存集成电路静态存储器
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GS8640Z18GT-300IT 数据手册

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Product Preview  
GS8640Z18/36T-300/250/200/167  
300 MHz167 MHz  
100-Pin TQFP  
Commercial Temp  
Industrial Temp  
72Mb Pipelined and Flow Through  
Synchronous NBT SRAM  
2.5 V or 3.3 V V  
DD  
2.5 V or 3.3 V I/O  
Because it is a synchronous device, address, data inputs, and  
read/ write control inputs are captured on the rising edge of the  
input clock. Burst order control (LBO) must be tied to a power  
rail for proper operation. Asynchronous inputs include the  
Sleep mode enable (ZZ) and Output Enable. Output Enable can  
be used to override the synchronous control of the output  
drivers and turn the RAM's output drivers off at any time.  
Write cycles are internally self-timed and initiated by the rising  
edge of the clock input. This feature eliminates complex off-  
chip write pulse generation required by asynchronous SRAMs  
and simplifies input signal timing.  
Features  
• NBT (No Bus Turn Around) functionality allows zero wait  
read-write-read bus utilization; Fully pin-compatible with  
both pipelined and flow through NtRAM™, NoBL™ and  
ZBT™ SRAMs  
• 2.5 V or 3.3 V +10%/10% core power supply  
• 2.5 V or 3.3 V I/O supply  
• User-configurable Pipeline and Flow Through mode  
• LBO pin for Linear or Interleave Burst mode  
• Pin compatible with 4Mb, 9Mb, 18Mb and 36Mb devices  
• Byte write operation (9-bit Bytes)  
• 3 chip enable signals for easy depth expansion  
• ZZ Pin for automatic power-down  
• JEDEC-standard 100-lead TQFP package  
• RoHS-compliant 100-lead TQFP package available  
The GS8640Z18/36T may be configured by the user to operate  
in Pipeline or Flow Through mode. Operating as a pipelined  
synchronous device, meaning that in addition to the rising edge  
triggered registers that capture input signals, the device  
incorporates a rising-edge-triggered output register. For read  
cycles, pipelined SRAM output data is temporarily stored by  
the edge triggered output register during the access cycle and  
then released to the output drivers at the next rising edge of  
clock.  
Functional Description  
The GS8640Z18/36T is a 72Mbit Synchronous Static SRAM.  
GSI's NBT SRAMs, like ZBT, NtRAM, NoBL or other  
pipelined read/double late write or flow through read/single  
late write SRAMs, allow utilization of all available bus  
bandwidth by eliminating the need to insert deselect cycles  
when the device is switched from read to write cycles.  
The GS8640Z18/36T is implemented with GSI's high  
performance CMOS technology and is available in a JEDEC-  
standard 100-pin TQFP package.  
Parameter Synopsis  
-300  
-250  
-200  
-167  
Unit  
t
2.3  
3.3  
2.5  
4.0  
3.0  
5.0  
3.5  
6.0  
ns  
ns  
KQ  
Pipeline  
3-1-1-1  
tCycle  
Curr (x18)  
Curr (x32/x36)  
400  
480  
340  
410  
290  
350  
260  
305  
mA  
mA  
t
5.5  
5.5  
6.5  
6.5  
7.5  
7.5  
8.0  
8.0  
ns  
ns  
KQ  
Flow  
Through  
2-1-1-1  
tCycle  
Curr (x18)  
Curr (x32/x36)  
285  
330  
245  
280  
220  
250  
210  
240  
mA  
mA  
*All GSI Technology packages are at least 5/6 RoHS compliant.  
Packages listed with the additional “G” designator are 6/6 RoHS compliant.  
Rev: 1.01 1/2006  
1/25  
© 2004, GSI Technology  
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.  

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