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MT48LC4M16A2
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MFG:MICRON Package Cooled:TSSOP

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Part Number: MT48LC4M16A2

MFG: MICRON

Package Cooled: TSSOP

Description: The Micron® 64Mb SDRAM is a high-speed CMOS, dynamic random-access memory containing 67,108,864 bits. It is interna...

MT48LC4M16A2 General Description

The Micron® 64Mb SDRAM is a high-speed CMOS, dynamic random-access memory containing 67,108,864 bits. It is internally configured as a quad-bank DRAM with a synchronous interface (all signals are registered on the positive edge of the clock signal, CLK). Each of the x4's 16,777,216-bit banks is organized as 4,096 rows by 1,024 columns by 4 bits. Each of the x8's 16,777,216-bit banks is organized as 4,096 rows by 512 columns by 8 bits. Each of the x16's 16,777,216-bit banks is organized as 4,096 rows by 256 columns by 16 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 an ACTIVE command, which is then followed by a READ or WRITE command. The address bits registered coincident with the ACTIVE command are used to select the bank and row to be accessed (BA0, BA1 select the bank; A0A11 select the row). The address bits registered coincident with the READ or WRITE command are used to select the starting column location for the burst access.

The SDRAM provides for programmable read or write burst lengths of 1, 2, 4, or 8 locations, or the full page, with a burst terminate 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 64Mb SDRAM uses an internal pipelined architecture to achieve high-speed operation. This architecture is compatible with the 2n rule of prefetch architectures, but it also allows the column address to be changed on every clock cycle to achieve a high-speed, fully random access. Precharging one bank while accessing one of the other three banks will hide the precharge cycles and provide seamless, high-speed, random-access operation.

The 64Mb SDRAM is designed to operate in 3.3V memory systems. An auto refresh mode is provided, along with a power-saving, power-down mode. All inputs and outputs are LVTTL-compatible.

SDRAMs offer substantial advances in DRAM operating performance, including the ability to synchronously burst data at a high data rate with automatic column-address generation, the ability to interleave between internal banks in order to hide precharge time and the capability to randomly change column addresses on each clock cycle during a burst access.

MT48LC4M16A2 Maximum Ratings

Parameter	Min	Max	Units
Voltage on V_DD, V_DDQ supply relative to V_SS	1V	+4.6	V
Voltage on inputs, NC or I/O pins relative to V_SS	1V	+4.6	V
Operating temperature T_A (commercial) T_A (extended; IT parts)	0 40	70 +85	°C
Storage temperature (plastic)	55	+150	°C
Power dissipation		1	W

MT48LC4M16A2 Features

• PC100-, and PC133-compliant
• Fully synchronous; all signals registered on positive edge of system clock
• Internal pipelined operation; column address can be changed every clock cycle
• Internal banks for hiding row access/precharge
• Programmable burst lengths: 1, 2, 4, 8, or full page
• Auto precharge, includes concurrent auto precharge, and auto refresh modes
• Self refresh modes: standard and low power
• 64ms, 4,096-cycle refresh
• LVTTL-compatible inputs and outputs
• Single +3.3V ±0.3V power supply

MT48LC4M16A2 Connection Diagram

MT48LC4M16A2 datasheet

MT48LC4M16A2
PDF/DataSheet Download

Datasheet: MT48LC4M16A2
File Size: 1493872 KB
Manufacturer: MICRON [Micron Technology]
Click here to Download

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