Micron MT46V DDR SDRAM
Micron MT46V DDR SDRAM — density, organization, speed grade, and TSOP / FBGA package are all in the suffix.
MT46V DDR SDRAM — density and package come from the suffix
These are 2.5V-class DDR (DDR1) memories. A 256Mb TSOP is not a drop-in for a 512Mb FBGA.
MT46V is Micron’s DDR SDRAM (DDR1) prefix, not one DRAM you can order. Listed variants on this page include 256Mb and 512Mb devices at about 2.5–2.7V, in 66-TSOP / TSSOP and 60-TFBGA, with organizations such as 16M × 16, 32M × 16, and 64M × 8. Speed tokens like -5B sit after the organization field.
The characters after MT46V encode density, I/O width, package (P / TG / CY / BG), speed, and revision. MT46V16M16P-5B:M and MT46V32M16P-5B:J share a TSOP-style outline but not the same memory size. MT46V64M8CY-5B:J is a 60-TFBGA and will not land on a 66-TSOP footprint.
Many MT46V MPNs are last-time-buy or obsolete on the open market. Confirm lifecycle on the exact suffix before you plan a multi-year buy. Compare the rows here, then RFQ the full Micron part number — never “MT46V” alone.
Key Features
- DDR1, 2.5V-class SDRAMListings show 2.5–2.7V (some 2.3–2.7V). Not DDR2 / DDR3 and not a 1.8V part.
- Density and organization in the suffix16M16, 32M16, 64M8 change size and I/O width. Match both to the controller and schematic.
- TSOP and FBGA are different land patterns66-TSSOP / TSOP versus 60-TFBGA is a layout change, not a BOM-only swap.
- Lifecycle is per suffixDDR1 families are often NRND or obsolete. Check the exact MPN before an LTB decision.
Target Applications
- Legacy industrial and comms boards designed around DDR SDRAM
- Last-time-buy and maintenance of 2.5V memory sockets
- Controller bring-up where the original MT46V density and package are known
- Second-source search when a specific 256Mb or 512Mb suffix is constrained
Ordering Variants
Compare 4 MT46V part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.
| Part Number | Description | Package Type | Manufacturer | Lifecycle | RoHS | Availability | Action |
|---|---|---|---|---|---|---|---|
| MT46V16M16P-5B:M | Package: 66-TSSOP (0.400", 10.16mm Width) | Mounting Type: Surface Mount | Supply Voltage: 2.5V ~ 2.7V | Memory Size: 256Mb (16M x 16) | Operating Temperature: 0°C ~ 70°C (TA) | 66-TSSOP (0.400", 10.16mm Width) | Micron Technology Inc. | Active | Compliant | In Stock | |
| MT46V32M16P-5B:J | Package: 66-TSSOP (0.400", 10.16mm Width) | Mounting Type: Surface Mount | Supply Voltage: 2.5V ~ 2.7V | Memory Size: 512Mb (32M x 16) | Operating Temperature: 0°C ~ 70°C (TA) | 66-TSSOP (0.400", 10.16mm Width) | Micron Technology Inc. | Active | Compliant | In Stock | |
| MT46V64M8CY-5B:J | Package: 60-TFBGA | Mounting Type: Surface Mount | Supply Voltage: 2.5V ~ 2.7V | Memory Size: 512Mb (64M x 8) | Operating Temperature: 0°C ~ 70°C (TA) | 60-TFBGA | Micron Technology Inc. | Active | Compliant | In Stock | |
| MT46V64M8P-5B:J | Package: 66-TSSOP (0.400", 10.16mm Width) | Mounting Type: Surface Mount | Supply Voltage: 2.5V ~ 2.7V | Memory Size: 512Mb (64M x 8) | Operating Temperature: 0°C ~ 70°C (TA) | 66-TSSOP (0.400", 10.16mm Width) | Micron Technology Inc. | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on MT46V map to package, grade, and reel options.
MT46V + organization + package + speed + revision. None of those fields is optional on a production PO.
16M16 / 32M16 / 64M8 — array organization (and therefore density). 16M × 16 is 256Mb; 32M × 16 and 64M × 8 are 512Mb.
P / TG vs CY / BG — package family. P / TG rows here are 66-lead TSOP-style; CY is 60-TFBGA.
-5B:x — speed grade and revision letter. A different speed or revision can change tCK and vendor qualification even if the package matches.
How to Choose the Right MT46V Variant
Match density and organization
256Mb 16M × 16 is not a substitute for 512Mb 32M × 16 or 64M × 8. The controller address map will not line up.
Match the package drawing
66-TSOP and 60-TFBGA are different land patterns. A CY / BG suffix will not sit on a P / TG TSOP footprint.
Match speed and voltage
Listed parts are 2.5V-class DDR. Confirm -5B (or other) speed against the memory controller timing.
Plan for obsolescence
Quote the full Micron MPN and ask for lifecycle / date code. A prefix-only MT46V search is not enough for an LTB.
Technical Specifications
Core parameters for MT46V product family
Identity
Electrical
Mechanical
Source MT46V with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 4 ordering variants from Micron Technology Inc.. Our team supports active, EOL, and hard-to-find component sourcing.
- Original manufacturer parts with traceability options
- BOM upload and multi-line RFQ support
- Package, grade, and compliance verification
Frequently Asked Questions
Common technical questions about the MT46V product family.