Memory

Part Number	Description / PDF	Quantity
AS4C128M8D3LB-12BCNTR Alliance Memory, Inc.	IC DRAM 1GBIT PARALLEL 78FBGA	0
AS4C4M32S-6BIN Alliance Memory, Inc.	IC DRAM 128MBIT PARALLEL 90TFBGA	535
AS7C31024B-12TJCNTR Alliance Memory, Inc.	IC SRAM 1MBIT PARALLEL 32SOJ	0
AS4C128M16D2A-25BCN Alliance Memory, Inc.	IC DRAM 2GBIT PARALLEL 84FBGA	162
AS4C256M8D3LB-12BCNTR Alliance Memory, Inc.	IC DRAM 2GBIT PARALLEL 78FBGA	0
AS7C34096B-10TIN Alliance Memory, Inc.	IC SRAM 4MBIT PARALLEL 48TSOP I	0
AS7C4096A-12TIN Alliance Memory, Inc.	IC SRAM 4MBIT PARALLEL 44TSOP2	0
AS4C64M32MD2-25BCN Alliance Memory, Inc.	IC DRAM 2GBIT PARALLEL 134FBGA	1
AS7C31026B-20TCNTR Alliance Memory, Inc.	IC SRAM 1MBIT PARALLEL 44TSOP2	0
AS4C64M8D2-25BCNTR Alliance Memory, Inc.	IC DRAM 512MBIT PARALLEL 60FBGA	0
AS4C128M8D3LB-12BAN Alliance Memory, Inc.	IC DRAM 1GBIT PARALLEL 78FBGA	0
AS4C128M8D3B-12BAN Alliance Memory, Inc.	IC DRAM 1GBIT PARALLEL 78FBGA	0
AS7C34098B-10BIN Alliance Memory, Inc.	IC SRAM 4MBIT PARALLEL 48TFBGA	61
AS4C64M16D2A-25BINTR Alliance Memory, Inc.	IC DRAM 1GBIT PARALLEL 84FBGA	0
AS7C4098A-12JIN Alliance Memory, Inc.	IC SRAM 4MBIT PARALLEL 44SOJ	242
AS4C64M16MD1A-5BIN Alliance Memory, Inc.	IC DRAM 1GBIT PARALLEL 60FBGA	182
AS4C128M16D2-25BCN Alliance Memory, Inc.	IC DRAM 2GBIT PARALLEL 84FBGA	42
AS6C62256A-70SIN Alliance Memory, Inc.	IC SRAM 256KBIT PARALLEL 28SOP	0
AS4C32M16D1A-5TANTR Alliance Memory, Inc.	IC DRAM 512MBIT PAR 66TSOP II	0
AS4C128M16D3LB-12BCNTR Alliance Memory, Inc.	IC DRAM 2GBIT PARALLEL 96FBGA	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)