Datasheet
Overview
The 128Mb SDRAM is a high-speed CMOS
synchronous DRAM containing 134,217,728 Mbits. It
is internally configured as a quad 1M x 32 DRAM
with a synchronous
interface (all signals are
registered on the positive edge of the clock signal,
CLK). Each of the 1M x 32 bit banks is organized as
4096 rows by 256 columns by 32 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.
Features
•
Fast access time from clock: 5.4/5.4 ns
•
Fast clock rate: 166/143 MHz
•
Fully synchronous operation
•
Internal pipelined architecture
•
Four internal banks (1M x 32-bit x 4bank)
•
Programmable Mode
- CAS Latency: 2 or 3
- Burst Length: 1, 2, 4, 8, or full page
- Burst Type: Sequential & Interleaved
- Burst-Read-Single-Write
•
Burst stop function
•
Individual byte controlled by DQM0-3
•
Auto Refresh and Self Refresh
•
4096 refresh cycles/64ms
•
Single 3.3V
±0.3V power supply
•
Operating Temperature
- Commercial (0°C~+70°C)
- Industrial (-40°C~+85°C)
•
Interface: LVTTL
•
Package:
- 86-pin 400 mil plastic TSOP II package (Pb free and Halogen free)
Table 1. Ordering Information
Product part No
Org Temperature
Max Clock (MHz)
AS4C4M32SA-6TIN
Industrial -40°C to +85°C
Package
86-pin TSOP II
AS4C4M32SA-6TCN
Commercial 0°C to +70°C
AS4C4M32SA-7TCN
Commercial 0°C to +70°C
86-pin TSOP II
86-pin TSOP II
143 MHz
166 MHz
166 MHz
4M x 32
4M x 32
4M x 32
AS4C4M32SA-6TIN
AS4C4M32SA-6TCN
AS4C4M32SA-7TCN
Confidential
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Rev.1.0 Sep.2015