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GS8342D08BD-400 Datenblatt(PDF) 1 Page - GSI Technology

Teilenummer GS8342D08BD-400
Bauteilbeschribung  36Mb SigmaQuad-IITM Burst of 4 SRAM
Download  34 Pages
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Hersteller  GSI [GSI Technology]
Direct Link  http://www.gsitechnology.com
Logo GSI - GSI Technology

GS8342D08BD-400 Datenblatt(HTML) 1 Page - GSI Technology

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GS8342D08/09/18/36BD-400/350/333/300/250
36Mb SigmaQuad-IITM
Burst of 4 SRAM
400 MHz–250 MHz
1.8 V VDD
1.8 V and 1.5 V I/O
165-Bump BGA
Commercial Temp
Industrial Temp
Rev: 1.02c 8/2017
1/34
© 2011, GSI Technology
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Features
• 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
• 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
• IEEE 1149.1 JTAG-compliant Boundary Scan
• Pin-compatible with present 144 Mb devices
• 165-bump, 13 mm x 15 mm, 1 mm bump pitch BGA package
• RoHS-compliant 165-bump BGA package available
SigmaQuad™ Family Overview
The GS8342D08/09/18/36BD are built in compliance with the
SigmaQuad-II SRAM pinout standard for Separate I/O
synchronous SRAMs. They are 37,748,736-bit (36Mb)
SRAMs. The GS8342D08/09/18/36BDSigmaQuad 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 GS8342D08/09/18/36BD 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. The device also allows the user to manipulate the
output register clock inputs quasi independently with the C and
C clock inputs. C and C are also independent single-ended
clock inputs, not differential inputs. If the C clocks are tied
high, the K clocks are routed internally to fire the output
registers instead.
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 4M x 8 has a 1M
addressable index).
- 400
-350
- 333
-300
-250
tKHKH
2.5 ns
2.86 ns
3.0 ns
3.3 ns
4.0 ns
tKHQV
0.45 ns
0.45 ns
0.45 ns
0.45 ns
0.45 ns


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