AS4C2M32SA-7TCN datasheet(2/54 Pages) ALSC

Part #	AS4C2M32SA-7TCN

Description	64Mb SDRAM AS4C2M32SA - 86pin TSOP II PACKAGE

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Manufacturer	ALSC [Alliance Semiconductor Corporation]

Direct Link	https://www.alliancememory.com

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Features

• Fast access time: 5.4/5.4 ns

• Fast Clock rate: 166/143 MHz

• Fully synchronous operation

• Internal pipelined architecture

• Four internal banks (512K x 32bit x 4bank)

• Programmable Mode

- CAS Latency: 2 or 3

- Burst Length: 1, 2, 4, 8, or full page

- Burst Type: Sequential or Interleaved

- Burst-Read-Single-Write

• Burst stop function

• Individual byte controlled by DQM0-3

• Auto Refresh and Self Refresh

• Operating Temperature:

- Commercial (0

°C~+70°C)

- Industrial (-40

°C~+85°C)

• 4096 refresh cycles/64ms

• Single +3.3V ± 0.3V power supply

• Interface: LVTTL

• Package:

- 86-pin 400 x 875 mil plastic TSOP II package (Pb and Halogen Free)

Overview

The 64Mb SDRAM is a high-speed CMOS synchronous

DRAM

containing

67,108,864bits.

It

is

internally

configured

as

a

quad

512K

x

32

DRAM

with

a

synchronous interface (all signals are registered on the

positive edge of the clock signal, CLK). Each of the 512K

x 32 bit banks is organized as 2048 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 Bank Activate 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.

Table

1. Ordering Information

Product part No

Org

Temperature

Max Clock (MHz)

AS4C

2M32SA-6TIN

Industrial -40°C to +85°C

Package

86-pin TSOP II

AS4C

2M32SA-6TCN

Commercial 0°C to +70°C

AS4C

2M32SA-7TCN

Commercial 0°C to +70°C

86-pin TSOP II

143 MHz

166 MHz

2M x 32

AS4C2M32SA-6TIN

AS4C2M32SA-6TCN

AS4C2M32SA-7TCN

Confidential

-2/54-

Rev.1.0 Sep. 2015

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