EM638165
EtronTech
4M x 16 bit Synchronous DRAM (SDRAM)
Preliminary (Rev. 5.3, Dec. /2013)
Features
Overview
Fast access time from clock: 4.5/5.4/5.4 ns
Fast clock rate: 200/166/143 MHz
Fully synchronous operation
Internal pipelined architecture
1M word x 16-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
The EM638165 SDRAM is a high-speed CMOS
synchronous DRAM containing 64 Mbits. It is
internally configured as 4 Banks of 1M word x 16
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.
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The EM638165 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.
- Optional drive strength control
Auto Refresh and Self Refresh
4096 refresh cycles/64ms
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CKE power down mode
Single +3.3V ± 0.3V power supply
Operating Temperature: TA = 0~70°C
Interface: LVTTL
• 54-pin 400 mil plastic TSOP II package
- Pb and Halogen Free
54-ball 8.0 x 8.0 x 1.2mm (max) FBGA package
- Pb free and Halogen free
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Table1. Key Specifications
EM638165
- 5/6/7
5/6/7
tCK3
tAC3
tRAS
Clock Cycle time(min.)
Access time from CLK(max.)
Row Active time(min.)
Row Cycle time(min.)
ns
4.5/5.4/5.4 ns
40/42/42 ns
55/60/63 ns
tRC
Table 2. Ordering Information
Part Number
Frequency
200MHz
166MHz
143MHz
200MHz
166MHz
143MHz
Package
TSOP II
TSOP II
TSOP II
FBGA
EM638165TS -5G
EM638165TS -6G
EM638165TS -7G
EM638165BM -5H
EM638165BM -6H
EM638165BM -7H
FBGA
FBGA
TS: indicates TSOPII Package
BM: indicates FBGA package
G: indicates Pb and Halogen Free for TSOPII Package
H: indicates Pb free and Halogen free
Etron Technology, Inc.
No. 6, Technology Rd. V, Hsinchu Science Park, Hsinchu, Taiwan 30078, R.O.C.
TEL: (886)-3-5782345
FAX: (886)-3-5778671
Etron Technology, Inc. reserves the right to change products or specification without notice.