AS4C1M16S-C&I
1M x 16 bit Synchronous DRAM (SDRAM)
Advanced (Rev. 2.0, March /2015)
Features
Overview
Fast access time: 5.4/5.4ns
Fast clock rate: 166/143 MHz
Self refresh mode: standard
Internal pipelined architecture
512K word x 16-bit x 2-bank
Programmable Mode registers
- CAS Latency: 2, or 3
- Burst Length: 1, 2, 4, 8, or full page
- Burst Type: Sequential or Interleaved
- Burst stop function
Individual byte controlled by LDQM and UDQM
Auto Refresh and Self Refresh
4096 refresh cycles/64ms
CKE power down mode
Industrial Temperature: -40~85 C
The 16Mb SDRAM is a high-speed CMOS
synchronous DRAM containing 16 Mbits. It is
internally configured as a dual 512K word x 16
DRAM with a synchronous interface (all signals are
registered on the positive edge of the clock signal,
CLK). Each of the 512K x 16 bit banks is organized
as 2048 rows by 256 columns by 16 bits. 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 SDRAM provides for programmable Read
or Write burst lengths of 1, 2, 4, 8, or full page, with
a burst termination option. 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. By having a programmable
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 particularly well suited
to high performance PC applications
°
JEDEC standard +3.3V 0.3V power supply
Operating temperature range
- Commercial (0 ~ 70°C)
- Industrial (-40 ~ 85°C)
Interface: LVTTL
50-pin 400 mil plastic TSOP II package
-Pb and Halogen Free
Table 1. Key Specifications
AS4C1M16S-C&I
-6/7
tCK3
tAC3
tRAS
tRC
Clock Cycle time(min.)
Access time from CLK (max.)
Row Active time(min.)
Row Cycle time(min.)
6/7
ns
5.4/5.4 ns
42/42 ns
60/63 ns
Table 2.Ordering Information
Part Number
Frequency Package
Temperature Temp Range
AS4C1M16S-7TCN
AS4C1M16S-6TIN
143MHz
166MHz
50-Pin TSOPII Commercial
50-Pin TSOPII Industrial
0~70
-40~85
℃
℃
T: indicates TSOP II package
C: Commercial
I: Industrial
N: indicates Pb and Halogen Free
Confidential
1
Rev. 2.0
March /2015
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
