Memory

Part Number	Description / PDF	Quantity
AS7C164A-15PCN Alliance Memory, Inc.	IC SRAM 64KBIT PARALLEL 28DIP	0
AS4C256M32MD4-062BAN Alliance Memory, Inc.	IC DRAM 4GBIT LVSTL 200FBGA	674
AS4C512M8D4-75BCN Alliance Memory, Inc.	IC DRAM 4GBIT PARALLEL 78FBGA	242
AS7C164A-15PCNTR Alliance Memory, Inc.	IC SRAM 64KBIT PARALLEL 28DIP	0
AS4C1G8D4-75BCN Alliance Memory, Inc.	IC DRAM 8GBIT PARALLEL 78FBGA	198
AS6C4008-55ZINTR Alliance Memory, Inc.	IC SRAM 4MBIT PARALLEL 32TSOP II	0
AS4C256M16MD4-062BAN Alliance Memory, Inc.	IC DRAM 2GBIT LVSTL 200FBGA	680
AS4C512M16D4-75BCN Alliance Memory, Inc.	IC DRAM 8GBIT PARALLEL 96FBGA	141
AS7C31026C-12BIN Alliance Memory, Inc.	IC SRAM 1MBIT PARALLEL 48BGA	0
AS7C31026C-12BINTR Alliance Memory, Inc.	IC SRAM 1MBIT PARALLEL 48BGA	0
AS4C512M8D3LC-12BCNTR Alliance Memory, Inc.	512M X 8, 1.35V, 800MHZ, DDR3-16	2000
AS6C4008A-55ZIN Alliance Memory, Inc.	IC SRAM 4MBIT PARALLEL 32TSOP II	0
AS4C32M16SB-7BIN Alliance Memory, Inc.	IC DRAM 512MBIT PAR 54TSOP II	0
N25Q064A13ESFA0F Alliance Memory, Inc.	IC FLSH 64MBIT SPI 108MHZ 16SOP2	815
N25Q064A13EF8A0F Alliance Memory, Inc.	IC FLSH 64MBIT SPI 108MHZ 8VDFPN	6101
AS7C164A-15PIN Alliance Memory, Inc.	IC SRAM 64KBIT PARALLEL 28DIP	0
AS4C512M8D3LC-12BINTR Alliance Memory, Inc.	512M X 8, 1.35V, 800MHZ, DDR3-16	2464
AS4C128M16D3A-12BINTR Alliance Memory, Inc.	IC DRAM 2GBIT PARALLEL 96FBGA	0
AS4C16M16S-6TINTR Alliance Memory, Inc.	IC DRAM 256MBIT PAR 54TSOP II	0
AS4C32M16D2-25BIN Alliance Memory, Inc.	IC DRAM 512MBIT PARALLEL 84TFBGA	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)