Memory

Part Number	Description / PDF	Quantity
AS4C4M32SA-6TCN Alliance Memory, Inc.	IC DRAM 128MBIT PAR 86TSOP II	0
AS7C3256A-20TIN Alliance Memory, Inc.	IC SRAM 256KBIT PAR 28TSOP I	0
AS4C16M32MD1-5BINTR Alliance Memory, Inc.	IC DRAM 512MBIT PARALLEL 90FBGA	0
AS6C4008A-55BINTR Alliance Memory, Inc.	IC SRAM 4MBIT PARALLEL 36TFBGA	0
AS7C34096A-15TCNTR Alliance Memory, Inc.	IC SRAM 4MBIT PARALLEL 44TSOP2	0
AS4C256M16D3LC-12BANTR Alliance Memory, Inc.	IC DRAM 4GBIT PARALLEL 96FBGA	0
AS4C64M4SA-6TINTR Alliance Memory, Inc.	IC DRAM 256MBIT PAR 54TSOP II	0
AS4C8M16SA-6TINTR Alliance Memory, Inc.	IC DRAM 128MBIT PAR 54TSOP II	0
AS6C1008-55STINTR Alliance Memory, Inc.	IC SRAM 1MBIT PARALLEL 32STSOP	0
AS4C4M16SA-6TAN Alliance Memory, Inc.	IC DRAM 64MBIT PAR 54TSOP II	98
AS7C3256A-12JINTR Alliance Memory, Inc.	IC SRAM 256KBIT PARALLEL 28SOJ	0
AS4C8M32S-7TCN Alliance Memory, Inc.	IC DRAM 256MBIT PAR 86TSOP II	0
AS7C31024B-12TCN Alliance Memory, Inc.	IC SRAM 1MBIT PARALLEL 32TSOP I	156
AS7C32098A-15TCNTR Alliance Memory, Inc.	IC SRAM 2MBIT PARALLEL 44TSOP2	0
AS7C3256A-20JCN Alliance Memory, Inc.	IC SRAM 256KBIT PARALLEL 28SOJ	0
AS4C32M8SA-7TCN Alliance Memory, Inc.	IC DRAM 256MBIT PAR 54TSOP II	46
AS4C64M16D3B-12BINTR Alliance Memory, Inc.	IC DRAM 1GBIT PARALLEL 96FBGA	0
AS4C16M32SC-7TIN Alliance Memory, Inc.	IC DRAM 512MBIT PAR 86TSOP II	127
AS4C4M16SA-5TCNTR Alliance Memory, Inc.	IC DRAM 64MBIT PAR 54TSOP II	0
PC28F640P30TF65A Alliance Memory, Inc.	IC FLASH 64MBIT PAR 64EASYBGA	761

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)