EM638165

EM638165 - 4Mega x 16 Synchronous DRAM (SDRAM)

• Fast access time from clock: 5/6/6/6/7 ns 

• Fast clock rate: 166/143/133/125/100 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: interleaved or linear burst 

 - Burst stop function 

• Auto Refresh and Self Refresh 

• 4096 refresh cycles/64ms 

• CKE power down mode 

• Single +3.3V ± 0.3V power supply 

• Interface: LVTTL 

• 54-pin 400 mil plastic TSOP II package 

Overview 

 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 

BankActivate command which is then followed by a 

Read or Write command. 

 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. 

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We support the following payment methods:

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 2. Western Union 

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 4. MoneyGram

Shipping:

1. MJD needs about 3 BUSINESS DAY to handle the order after received payment. after receiving your payment. Otherwise, we will state it in the invoice in advance.

2. MJD can Ship via your shipping account (DHL / FEDEX / UPS / TNT or others) as your instruction. Or Ship via our shipping account (We have a very good relationship with DHL and FEDEX with very special freight).

3. Regarding the declared value on the package for customs clearance, we are pleased to follow

your wishes, just feel free to inform us when ordering.

4. Any import fees or charges are the buyer's responsibility.

REFUNDS & RETURN:

We offer a warranty on all items that we sold. Item will be tested before ship,it will be in good condition,if there are some problems with the item,feel free to contact us.Please Email us to notify a defective item. Unless otherwise specified, this item comes with 30 days warranty from the shipment date.

You must contact us before returning any product. All returns must be made within 30 days from this shipment date.Return must be in new condition(the SAME CONDITION as it was sent to you)

Because of wholesale price is different from sample price, our website can not state. Please send your required part number via email Sales@hkmjd.com or skype id mjdccm898 to us.  As well as welcome you call us : 0755-83957301  We will send offer for you;  Sometimes manufacturer's price is unstable, so we don't adjust price in time. if you feel price is a little high for you, just feel free to contact us for consultation. Thank you for your support ！