AS4C32M16D1
32M x 16 bit DDR Synchronous DRAM (SDRAM)
Alliance Memory Confidential
Advanced (Rev. 1.1, July / 2011)
Features
Overview
Fast clock rate: 200MHz
Differential Clock CK & CK
Bi-directional DQS
DLL enable/disable by EMRS
Fully synchronous operation
Internal pipeline architecture
Four internal banks, 8M x 16-bit for each bank
Programmable Mode and Extended Mode registers
- CAS Latency: 2, 2.5, 3
- Burst length: 2, 4, 8
- Burst Type: Sequential & Interleaved
Individual byte-write mask control
DM Write Latency = 0
Auto Refresh and Self Refresh
8192 refresh cycles / 64ms
Operating temperature range
- Commercial (0 ~ 70°C)
- Industrial (-40 ~ 85°C)
Precharge & active power down
Power supplies: VDD & VDDQ = 2.5V ± 0.2V
Interface: SSTL_2 I/O Interface
Package: 66 Pin TSOP II, 0.65mm pin pitch
- Pb and Halogen free
The 512Mb DDR AS4C32M16D1 SDRAM is a highspeed CMOS double data rate synchronous DRAM
containing 512 Mbits. It is internally configured as a
quad 8M x 16 DRAM with a synchronous interface (all
signals are registered on the positive edge of the clock
signal, CK). Data outputs occur at both rising edges of
CK and CK .d Read and write accesses to the SDRAM
are burst oriented; accesses start at a selected location
and continue for a programmed number of locations in a
programmed sequence. Accesses begin with the
registration of a BankActivate command which is then
followed by a Read or Write command. The DDR
SDRAM provides programmable Read or Write burst
lengths of 2, 4, or 8. An auto precharge function may be
enabled to provide a self-timed row precharge that is
initiated at the end of the burst sequence. The refresh
functions, either Auto or Self Refresh are easy to use. In
addition,
The
DDR
AS4C32M16D1
features
programmable DLL option. By having a programmable
mode register and extended mode register, the system
can choose the most suitable modes to maximize its
performance. These devices are well suited for
applications requiring high memory bandwidth and high
performance.
Table 1.Ordering Information
Temperature Temp Range
Part Number
Clock
Data Rate
Package
0 ~ 70°C
AS4C32M16D1-5TCN 200MHz 400Mbps/pin 66pin TSOPII Commercial
Industrial
-40 ~ 85°C
AS4C32M16D1-5TIN 200MHz 400Mbps/pin 66pin TSOPII
T: indicates TSOP II package
C: indicates Commercial temp.
I: indicates Industrial temp.
N: indicates lead free ROHS
Confidential
1
Rev.1.1
July /2011