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GS8180QV36D-100I Arkusz danych(PDF) 1 Page - GSI Technology

Numer części GS8180QV36D-100I
Szczegółowy opis  18Mb Burst of 2 SigmaQuad SRAM
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Producent  GSI [GSI Technology]
Strona internetowa  http://www.gsitechnology.com
Logo GSI - GSI Technology

GS8180QV36D-100I Arkusz danych(HTML) 1 Page - GSI Technology

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Rev: 2.03 10/2004
1/32
© 2002, GSI Technology
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS8180QV18/36D-200/167/133/100*
18Mb Burst of 2
SigmaQuad SRAM
200 MHz–100 MHz*
2.5 V VDD
1.8 V or 1.5 V I/O
165-Bump BGA
Commercial Temp
Industrial Temp
Features
• Simultaneous Read and Write SigmaQuad™ Interface
• JEDEC-standard pinout and package
• Dual DoubleData Rate interface
• Byte Write controls sampled at data-in time
• Burst of 2 Read and Write
• 2.5 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 mode pin for programmable output drive strength
• IEEE 1149.1 JTAG-compliant Boundary Scan
• 165-bump, 13 mm x 15 mm, 1 mm bump pitch BGA package
• Pin-compatible with future 36Mb, 72Mb, and 144Mb devices
SigmaRAM™ Family Overview
GS8180QV18 are built in compliance with the SigmaQuad
SRAM pinout standard for Separate I/O synchronous SRAMs.
They are18,874,368-bit (18Mb) SRAMs. These are the first in
a family of wide, very low voltage HSTL I/O SRAMs designed
to operate at the speeds needed to implement economical high
performance networking systems.
SigmaQuad SRAMs are offered in a number of configurations.
Some emulate and enhance other synchronous separate I/O
SRAMs. A higher performance SDR (Single Data Rate) Burst
of 2 version is also offered. The logical differences between
the protocols employed by these RAMs hinge mainly on
various combinations of address bursting, output data
registering, and write cueing. Along with the Common I/O
family of SigmaRAMs, the SigmaQuad family of SRAMs
allows a user to implement the interface protocol best suited to
the task at hand.
Clocking and Addressing Schemes
A Burst of 2 SigmaQuad SRAM is a synchronous device. It
employs 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.
Because Separate I/O Burst of 2 RAMs always transfer data in
two packets, A0 is internally set to 0 for the first read or write
transfer, and automatically incremented by 1 for the next
transfer. Because the LSB is tied off internally, the address
field of a Burst of 2 RAM is always one address pin less than
the advertised index depth (e.g., the 1M x 18 has a 512K
addressable index).
*x18 part available in 200/167/133/100 MHz speeds; x36 part available in 133/100 MHz
Parameter Synopsis*
-200
-167
-133
-100
tKHKH
5.0 ns
6.0 ns
7.5 ns
10.0 ns
tKHQV
2.3 ns
2.5 ns
3.0 ns
3.0 ns


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