Memory

Part Number	Description / PDF	Quantity
AS7C256A-12TINTR Alliance Memory, Inc.	IC SRAM 256KBIT PAR 28TSOP I	0
AS7C38096A-10TINTR Alliance Memory, Inc.	IC SRAM 8MBIT PARALLEL 44TSOP2	0
AS5F18G04SND-10LIN Alliance Memory, Inc.	IC FLASH 8GBIT SPI/QUAD I/O 8LGA	1430
AS7C34098A-10TIN Alliance Memory, Inc.	IC SRAM 4MBIT PARALLEL 44TSOP2	1663
AS7C1024B-12JCN Alliance Memory, Inc.	IC SRAM 1MBIT PARALLEL 32SOJ	0
AS4C256M16D3LC-10BIN Alliance Memory, Inc.	IC DRAM 4GBIT PARALLEL 96FBGA	297
AS4C64M8D3L-12BINTR Alliance Memory, Inc.	IC DRAM 512MBIT PARALLEL 78FBGA	0
AS7C3256A-10TCNTR Alliance Memory, Inc.	IC SRAM 256KBIT PAR 28TSOP I	0
AS4C64M16MD1A-5BINTR Alliance Memory, Inc.	IC DRAM 1GBIT PARALLEL 60FBGA	0
JS28F640J3F75A Alliance Memory, Inc.	IC FLASH 64MBIT PARALLEL 56TSOP	260
AS4C64M8D2-25BANTR Alliance Memory, Inc.	IC DRAM 512MBIT PARALLEL 60FBGA	0
AS7C31026B-20TCN Alliance Memory, Inc.	IC SRAM 1MBIT PARALLEL 44TSOP2	0
AS4C128M16D3LC-12BIN Alliance Memory, Inc.	IC DRAM 2GBIT 800MHZ 96FBGA	198
MT46V16M16TG-5B:MTR Alliance Memory, Inc.	IC DRAM 256MBIT PAR 66TSOP II	0
AS6C2008-55STIN Alliance Memory, Inc.	IC SRAM 2MBIT PARALLEL 32STSOP	0
M45PE80-VMP6G Alliance Memory, Inc.	IC FLASH 8MBIT SPI 75MHZ 8VFQFPN	535
AS7C256A-12JCN Alliance Memory, Inc.	IC SRAM 256KBIT PARALLEL 28SOJ	59
AS8C801800-QC150N Alliance Memory, Inc.	IC SRAM 9MBIT PARALLEL 100TQFP	0
AS7C4098A-20JIN Alliance Memory, Inc.	IC SRAM 4MBIT PARALLEL 44SOJ	95
AS7C316098A-10TINTR Alliance Memory, Inc.	IC SRAM 16MBIT PARALLEL 48TSOP I	0

Memory

1. Overview

Memory integrated circuits (ICs) are semiconductor devices used for storing digital data in electronic systems. As fundamental components of modern electronics, they enable data retention and retrieval in computers, mobile devices, industrial equipment, and automotive systems. Memory ICs are categorized into volatile (requires power to retain data) and non-volatile (retains data without power) types, playing critical roles in system performance, storage capacity, and energy efficiency.

2. Major Types and Functional Classification

Type	Functional Characteristics	Application Examples
DRAM (Dynamic RAM)	High-density, low-cost, requires periodic refresh	PCs, Servers, Graphics Cards
NAND Flash	Non-volatile, high endurance, block-level access	SSDs, USB Drives, Mobile Storage
SRAM (Static RAM)	High-speed, low density, no refresh required	Cache Memory, Networking Equipment
NOR Flash	Random access, execute-in-place capability	Embedded Systems, Automotive ECUs
MRAM (Magnetoresistive RAM)	Non-volatile, unlimited endurance, low power	IoT Devices, Industrial Sensors

3. Structure and Composition

Memory ICs typically consist of:

Storage Cell Array: Matrix of memory cells (transistors/capacitors for DRAM, floating-gate transistors for Flash)
Address Decoder: Selects specific memory locations
I/O Circuits: Data input/output interfaces
Control Logic: Manages read/write operations and timing
Power Management Units: Optimizes energy consumption

Advanced packages include BGA (Ball Grid Array) and 3D-stacked configurations for density optimization.

4. Key Technical Specifications

Parameter	Description	Importance
Storage Capacity	Data volume (Gb/GiB)	Determines system memory limits
Access Time	ns/predictable latency	Impacts processing speed
Power Consumption	mW/MHz	Affects battery life and thermal design
Endurance	P/E cycles (Flash)	Dictates product lifespan
Data Retention	Years (non-volatile)	Critical for long-term storage

5. Application Areas

Consumer Electronics: Smartphones (NAND Flash), Gaming Consoles (GDDR6)
Industrial Automation: PLCs (SRAM), Data Loggers (MRAM)
Automotive Systems: ADAS (LPDDR5), Infotainment (eMMC)
Enterprise Storage: SSD Controllers (3D NAND), Servers (RDIMM)

6. Leading Manufacturers and Products

Manufacturer	Representative Products
Samsung Electronics	V-NAND (9x-layer), LPDDR5X
SK hynix	HBM3 (8GB/s bandwidth), GDDR6
Microchip Technology	Serial NOR Flash (SST26)
Kioxia Corporation	BiCS FLASH (3D NAND)
Infineon Technologies	MRAM (40nm process)

7. Selection Recommendations

Key considerations:

Match memory type to application requirements (e.g., NOR Flash for code storage)
Evaluate bandwidth vs. latency tradeoffs
Analyze temperature and vibration specifications
Assess long-term supply stability
Optimize cost-per-bit metrics

Case Study: A smartphone manufacturer selected UFS 3.1 (NAND-based) for 2100MB/s read speeds, improving app launch times by 35%.

8. Industry Trends

Future directions include:

3D NAND scaling beyond 200 layers
Emerging memories (ReRAM, PCM) for AI acceleration
Package-on-Package (PoP) integration
AI-optimized memory architectures (Processing-in-Memory)
Green manufacturing processes (EUV lithography)