Revision History
256M AS4C32M8SA 54-pin TSOPII PACKAGE
Revision Details Date
Rev 1.0 Preliminary datasheet
Jun. 2017
Alliance Memory Inc. 511 Taylor Way, San Carlos, CA 94070
TEL: (650) 610-6800 FAX: (650) 620-9211
Alliance
Memory
Inc. reserves
the
right to change products or specification without notice
AS4C32M8SA-7TCN
AS4C32M8SA-6TIN
Confidential
- 1 of 55 -
Rev.1.0 June 2017
32M x 8 bit Synchronous DRAM (SDRAM)
Advance (Rev. 1.0, Jun. /2017)
Features
Fast access time from clock: 5/5.4 ns
Fast clock rate: 166/143 MHz
Fully synchronous operation
Internal pipelined architecture
8M word x 8-bit x 4-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
Auto Refresh and Self Refresh
8192 refresh cycles/64ms
CKE power down mode
Single +3.3V ±0.3V power supply
Operating Temperature:
Interface: LVTTL
54-pin 400 mil plastic TSOP II package
- Pb free and Halogen free
Overview
The AS4C32M8SA SDRAM is a high-speed
CMOS synchronous DRAM containing 256 Mbits. It
is internally configured as 4 Banks of 8M word x 8
DRAM with a synchronous interface (all signals are
registered on the positive edge of the clock signal,
CLK). 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 AS4C32M8SA 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.
Table&1.&Ordering&Information&
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art N
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mb
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r
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Te
mperat
ure!
M
a
xClock (
MHz)
Pa
ckage
Table 2. Key Specifications
AS4
C
32M8SA-7TCN
32Mx
8
Commercial 0
°C
t
o +
70
°C
54-pin TSOPII
1
43
MHz
AS4C32M8SA-7TCN
AS4C32M8SA-6TIN
Confidential
- 2 of 55 -
Rev.1.0 June 2017
Commercial: T
A
= 0~70°C
Industrial: T
A
= -40~85°C
AS4C32M8SA-6TIN
32
Mx8
Industrial
-4
0°C
to +85°C
54-pin TSOPII
166
MHz
tCK3 Clock Cycle time(min.)
6 7
ns
tAC3 Access time from CLK (max.)
5 5.4
ns
tRAS Row Active time(min.)
42 42
ns
tRC Row Cycle time(min.)
60 63
ns
AS4C32M8SA
-6
-7
Unit