RISEIC — Hong Kong Chenshengwei Electronics

Memory ICs: DRAM, Flash, SRAM & EEPROM

Memory is a commodity market — prices move weekly. We stock 17,000+ memory part numbers with daily spot pricing: Micron DDR3/DDR4 DRAM, NOR and NAND flash, serial EEPROM, and the legacy SRAM/EPROM lines that keep older designs in production.

Because memory pricing fluctuates, we quote per-lot against current market and hold the offer for a defined validity window, so your costing never drifts between PO and delivery.

Memory types we stock

DRAM (DDR3/DDR4 components and legacy SDRAM/DRAM), serial NOR and NAND flash for boot and storage, parallel NOR, low-power SRAM and PSRAM, and I2C/SPI EEPROM in all standard densities.

Legacy memory — Cypress/Infineon SRAM, Alliance and ISSI async SRAM, 5V EPROM in PDIP — is a specialty: these lines survive in industrial controls, avionics and instrumentation long after franchise delists them.

Memory typeMain brandsNotes
DRAM (DDR3/DDR4, legacy)Micron, Samsung, SK hynixSpot-priced per lot
NOR / NAND FlashMicron, Winbond, MacronixSerial and parallel
SRAM / PSRAMCypress (Infineon), ISSI, AllianceLegacy PDIP/SOJ available
EEPROMST, Microchip, onsemiI2C/SPI/Microwire

How memory spot pricing works

We price each lot against the daily Shenzhen/Hong Kong spot market. Your quote states unit price, quantity, date code and validity window — typically 24 to 72 hours on volatile lines.

For recurring demand we can reserve lots and schedule staged deliveries, smoothing your exposure to spot spikes.

Popular memory parts in stock

Part NumberManufacturerPackageNotes
MT41K1G4DA-107:PMicron TechnologyDRAM FBGA (typ.)DDR3L SDRAM component
MT41K1G4RG-107:NMicron TechnologyDRAM FBGA (typ.)DDR3L x16 organization
MT41K1G8SN-107:AMicron TechnologyDRAM FBGA (typ.)DDR3L x8 organization
MT41J1G4THD-15E:DMicron TechnologyDRAM FBGA (typ.)DDR3 legacy speed bin
MT41K2G4SN-125:AMicron TechnologyDRAM FBGA (typ.)8 Gb DDR3L density
CY2149-45PCCypress (Infineon)PDIPLegacy SRAM, through-hole

Can't find your part number? Search the full catalog — we source beyond listed stock.

Frequently Asked Questions

Are your memory prices updated daily?

Yes — DRAM and flash are quoted per lot against daily spot markets with a stated validity window.

Can you supply date-code-matched lots?

Yes, we can match date codes within a lot for production consistency.

Do you carry legacy PDIP SRAM and EPROM?

Yes, through-hole legacy memory is one of our specialty lines.

What is the MOQ?

From one piece; production volumes ship in factory trays or reels.

Can you test memory before shipment?

Yes — visual, X-ray and functional memory testing available through partner labs.

How fast do in-stock parts ship?

1–3 working days from Hong Kong via DHL/FedEx/UPS.

Start an RFQ or upload your BOM — our Hong Kong desk replies within 2 working hours.