【选型】Alliance的DRAM AS4C256M16D3-12BCN替代S品牌K4B4G1646E可行性分析

时间： 2020-03-16 来源：Alliance

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DRAM,K4B4G1646E,AS4C256M16D3-12BCN,Alliance

ALLIANCE Memory是全球领先的高性能存储器及存储扩展逻辑产品厂家。Alliance Memory公司新推出的4Gb Double-Data-Rate-3 DRAM AS4C256M16D3-12BCN，双倍数据速率架构，可实现高速操作，它在内部配置为八存储区DRAM。4Gb芯片组织为32Mbit x 16 I / O x 8 bank设备。这些同步设备在一般应用中实现了高达1600 Mb / sec / pin的高速双数据速率传输速率。

本文讨论Alliance 的AS4C256M16D3-12BCN替代S品牌的K4B4G1646E可行性。

AS4C256M16D3-12BCN和K4B4G1646E主要参数对比如下：

表1 AS4C256M16D3-12BCN和K4B4G1646E主要参数对比表

由表可知，AS4C256M16D3-12BCN和K4B4G1646E的内存大小、频率、响应时间、工作温度范围、封装基本相同；AS4C256M16D3-12BCN的工作电压较之K4B4G1646E范围要广；AS4C256M16D3-12BCN的功耗略高于K4B4G1646E。

下面对比AS4C256M16D3-12BCN和K4B4G1646E的管脚位置、定义和封装。

图1 K4B4G1646E管脚分布

图2 AS4C256M16D-12BCN管脚分布

AS4C4M16SA和K4B4G1646E 管脚定义如下：

表2 K4B4G1646E管脚定义

表3 AS4C256M16D3-12BCN管脚定义

K4B4G1646E尺寸：

图3 K4B4G1646E尺寸图

AS4C256M16D3-12BCN尺寸:

图4 AS4C256M16D3-12BCN尺寸

AS4C256M16D3-12BCN和K4B4G1646E封装相同、管脚分布和定义也相同。有几个命名不同，且AS4C256M16D3-12BCN芯片比K4B4G1646E宽1.5mm。

综上所述，如果AS4C256M16D3-12BCN芯片宽度不影响PCB布局、功耗满足应用需求，则Alliance 的AS4C256M16D3-12BCN可以替代S品牌的K4B4G1646E。

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【选型】Alliance AS4C4M16SA SDRAM替代W品牌W9864G6JT的可行性分析

Alliance Memory公司新推出的64Mb同步动态随机存取存储器AS4C4M16SA。它在内部配置为具有同步接口的4个1M字x 16 DRAM库（所有信号都记录在时钟信号CLK的上升沿）。本文讨论Alliance的AS4C4M16SA SDRAM替代W品牌的W9864G6JT可行性。

2020-03-12 - 器件选型代理服务技术支持现货查询批量订货

ALLIANCE 存储器选型表

提供存储器、存储芯片、SRAM、SDRAM、DDR1、DDR2、DDR3、DDR4选型，VCC(V)：0.6-5，MSL LEVEL：0-5，CLOCK(MHz)：133-1866，可支持商业级/工业级/汽车级。

产品型号	品类	Product Family	DENSITY	ORGANISATION	VCC(V)	TEMPERATURE RANGE(°C)	PACKAGE	MSL LEVEL
AS7C164A-15JCN	存储器	FAST-Asynch	64K Fast	8K x 8	5V	Commercial (0 ~ 70°C)	28pin SOJ(300mil)	3

选型表 - ALLIANCE 立即选型

Alliance DRAM/SDRAM/SRAM/eMMC/闪存选型指南

描述- Alliance Memory is pleased to highlight our new product offerings in DRAM, SRAM, FLASH and eMMC in this new 2024 edition of our Product Selection Guide.We continue to be the premier legacy memory supplier offering high quality products, minimal die shrinks and long term support.

型号- AS4C8M16SA-7TXN,AS6C2008A,AS6C62256-55SXN,ASFC64G31T5-51BIN,AS4C8M32MD2A-25BPCN,AS4C64M32MD2A-25BIN,AS5F18G04SND-10LIN,AS1C512K16P-70BIN,AS4C8M32MSB-6BIN,AS7C38096B-10BIN,ASFC32G31T3-51BIN,AS29CF160B-55TIN,AS4C16M16SA-6TXN,AS7C31025C-12JIN,AS7C31024B-XXTCN,M29F160FT55N3E2,AS4C64M16MD2A-25BIN,AS4C32M16MSB-6BIN,M29F800FT55N3E2,AS25F1128MQ-70WIN,AS7C1024B-XXJCN,AS5F34G04SNDB-08LIN,AS29CF800T-55TIN,AS4C8M16SA-6BXN,AS4C4M16SA-6TXN,AS9F38G08SA-25BIN,N25Q064A13ESFA0F,AS25F364MQ-10WIN,AS9F31G08SA-25BIN,AS4C32M8D1-5TXN,AS4C64M4SA-6 TXN,AS4C256M16D4-83BXN,AS7C31025B-XXJIN,AS4C8M16SA-6 TXN,AS1C1M16P-70BIN,AS4C8M16SA-7 BXN,AS25F34MD-10S1IN,AS6C6416-55TIN,AS4C128M8D2A-25BXN,AS6C2008A-55TIN,AS4C2M32S-7BXN,AS4C512M16D3LC-12BXN,AS4C2M32SA-7 TXN,AS7C1026B-XXTIN,AS7C325632-10BIN,AS6C2016-55ZIN,AS4C16M16SA-7TXN,AS1C1M16PL-70BIN,N25Q064A13EF8H0E,AS6C4016B-45BIN,AS4C512M8D4A-75BXN,AS4C512M16D4A-62BXN,AS4C1G32MD4V-046BIN,AS7C34096B-10BIN,AS4C4M16SA-7TXN,AS6C1008-55PCN,AS7C164A-15PXN,AS1C8M16PL-70BIN,AS6C1008-55SIN,AS4C256M16MD4V-062BAN,N25Q032A13ESCA0F,AS7C34098B,ASFC4G31M-51BIN,AS5F32G04SNDB-08LIN,AS4C4M16SA-6BXN,AS7C34098A,N25Q064A13EF640E,AS7C38098A-10BIN,AS7C3256A-XXTIN,AS4C32M16D3-12BXN,M45PE80-VMP6G,AS4C8M16SA-6TXN,AS4C32M16D3L-12BXN,AS7C1026B-XXTCN,AS4C64M16D2B-25BCN,AS4C128M32MD2A-25BIN,AS7C4098A-XXJXN,AS4C512M16MD4V-053BIN,AS7C256A-XXTIN,AS4C1G8D3LA-10BXN,AS4C2M32S-6BXN,AS4C8M32S-6TXN,AS4C256M16D3C-93BXN,AS4C128M16MD2A-25BIN,AS7C4096A-XXTXN,AS4C64M4SA-7 TXN,AS4C32M16SB-7 TXN,AS4C512M8D4-83BXN,AS4C16M16MSA-6BIN,AS6C8016B,AS6C1008-55TIN,AS4C4M32SA-6 TXN,AS7C38098A-10TIN,AS4C64M16MD1A-5BIN,A7C351232-10BIN,AS6C8016,AS7C34096A,AS9F14G08SA-45BIN,AS7C34096B,AS7C34096B-10TIN,AS6C1616B-45BIN,AS4C2M32SA-6 TXN,AS4C4M16SA-7 TXN,AS4C16M16SA-7 TXN,AS6C1616-55TIN,AS7C316098A,AS7C316098B,AS4C16M16MD1-6BCN,AS4C256M32MD4-062BAN,AS6C1016-55BIN,AS29CF040-55CCIN,AS6C4008-55SIN,AS4C512M8D3LC-12BXN,AS6C4008-55PCN,AS6C1616B-55BIN,AS4C8M32SA-6 BXN,AS7C316096B-10TIN,AS4C128M8D3B-12BXN,AS5F31G04SND-08LIN,ASFC16G31M-51BIN,AS4C32M16D1A-5TXN,AS4C128M16MD4V-062BAN,AS6C4008-70SAN,AS6C8008B-45BIN,AS4C32M16SB-7TXN,AS7C31024B-XXTJCN,AS4C8M32MD2A-25BCN,AS7C32098A-XXTXN,AS25F304MD-10S1IN,AS7C3256A,AS25F1128MQ-70SIN,AS6C8016B-55ZIN,AS6C1608B-45BIN,M45PE16-VMW6TG,AS6C1016,AS6C4008-55BIN,AS7C351232,AS7C316096A-10TIN,AS4C8M16MSB-6BIN,M45PE20-VMN6P,AS4C256M16D3C-93BCN,AS4C16M32SB-6BXN,AS7C38096A-10TIN,AS4C32M16SB-6 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