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GS8662D08E Datasheet, PDF (1/29 Pages) GSI Technology – 72Mb SigmaQuad-II Burst of 4 SRAM | |||
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Preliminary
GS8662D08/09/18/36E-333/300/250/200/167
165-Bump BGA
Commercial Temp
Industrial Temp
72Mb SigmaQuad-II
Burst of 4 SRAM
333 MHzâ167 MHz
1.8 V VDD
1.8 V and 1.5 V I/O
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/â100 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 9Mb, 18Mb, and 36Mb and
future 144Mb devices
⢠165-bump, 15 mm x 17 mm, 1 mm bump pitch BGA package
⢠RoHS-compliant 165-bump BGA package available
SigmaQuad⢠Family Overview
The GS8662D08/09/18/36E are built in compliance with the
SigmaQuad-II SRAM pinout standard for Separate I/O
synchronous SRAMs. They are 75,497,472-bit (72Mb)
SRAMs. The GS8662D08/18/36E SigmaQuad 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 GS8662D08/09/18/36E 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
Bottom View
165-Bump, 15 mm x 17 mm BGA
1 mm Bump Pitch, 11 x 15 Bump Array
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 SigmaQuad-II B4 RAMs always transfer
data in four packets, A0 and A1 are internally set to 0 for the
first read or write transfer, and automatically incremented by 1
for the next transfers. Because the LSBs are tied off internally,
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 18 has a 1024K addressable index).
Parameter Synopsis
tKHKH
tKHQV
- 333
3.0 ns
0.45 ns
-300
3.3 ns
0.45 ns
-250
4.0 ns
0.45 ns
-200
5.0 ns
0.45 ns
-167
6.0 ns
0.50 ns
Rev: 1.01a 2/2006
1/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2005, GSI Technology
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