Standard Products
QCOTSTM UT8SDSQ128M8 1 Gigabit SDRAM
Product Brief
March 25, 2004
INTRODUCTION
FEATURES
Organized 128M x 8bits
Single JEDEC standard 3.3V power supply
The UT8SDSQ128M8 is a high performance, highly integrated
Synchronous Dynamic Random Access Memory (SDRAM)
stack. Total module density is 1,073,741, 824 bits of storage.
Organization is two (2) pages of 512 Mbits. Each memory page
is organized 64M by 8 bits (pages are organized as four (4) banks
of 16M x 8 selected via BA(1:0)). The two pages have an 8-bit
interface independently selectable using the appropriate activelow chip select pin (CSn). All other signals are common to the
four (4) 256 Mbit SDRAM memories.
33MHz operation -40oC to 85oC
LVTTL compatible with multiplexed address
Four bank operation
MRS cycle with address key program
- CAS latency (2 and 3)
- Burst length (8)
- Burst type (sequential and interleave)
Fully synchronous; all signals registered on positive edge
of system clock
Burst read single-bit write operation
Auto-refresh and self-refresh
Typical radiation performance
- Total dose > 10krad(Si)
Synchronous design allows precise memory accesses through
the use of two system clocks. This architecture provides the
ability for I/O transactions being performed on the positive edge
of each clock cycle.
Ideal uses for the UT8SDSQ128M8 include space applications
requiring high performance and high density, such as a space
borne solid state recorder. In addition, the programmable burst
length and programmable CAS latencies enable the device to be
used in a variety of high bandwidth space applications.
- SEL Immune >40-60 MeV-cm2/mg (contact factory)
Package options:
- 54-lead Small Outline Package (SOP)
Max temperature at module side during installation
should not exceed 215oC
DQM0
CS1/CKE1
TSOP1 PAGE 0
TSOP2 PAGE 1
SDRAM
RAS
CAS
SDRAM
TSOP4 PAGE 1
SDRAM
TSOP3 PAGE 0
SDRAM
CS0/CKE0
DQM1
WE
4
CLK
4
A(12:0)
4
4
BA(1:0)
DQ(7:4) DQ(3:0)
Common Signals: RAS, CAS, WE, CLK, A(12:0) and BA(1:0)
Figure 1: UT8SDSQ128M8 Functional Block Diagram (1Gb STACK)
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