This Product Selection Guide contains information to help select products in the Controllers category on DigiKey.com
Memory controller products are used to mediate interactions between a device such as a microcontroller and external data storage devices, with the exact functionality offered varying depending on the intended use case. For example, some provide the necessary power monitoring and management facilities to allow conversion of a volatile memory to non-volatile, others provide a bridge between a standard USB interface and an array of NAND flash devices, while others provide functions that differ in other ways.
SelectionCharacteristics
Controller Type: The specific type or category of memory controller integrated into the IC.
Voltage - Supply: Typically represented by a range, this indicates the low and high voltage limits which one can expect standard operation. Voltages outside this range may damage the device and other system components.
Mounting Type : How the device is attached.
Expanding on Mounting Types
Chassis Mount
Designed to be mounted to a metal chassis.
Chassis Mount, 8" Wire Lead
Attaches to a metal chassis but it includes an 8" wire for connection.
Chassis, Stud Mount
Designed to be mounted to a metal Chassis using an incorporated stud bolt.
Screw Mount
Attaches using screw terminals.
Stud Mount
Has a stud bolt incorporated into one side for attachment.
Flange Mount
Screws or bolts go through wings (flanges) that protrude from the product.
Connector Mount
A mount that incorporates a connector into its method of attachment into the electrical system.
Surface Mount
Have pins or pads that connect to solder pads on the PCB that are then soldered in place forming an electrical and mechanical connection. Number in front of SMD indicates how many pins/pads, for example a 6-SMD module has 6 pins/pads. May not use or even have all the pins/pads for example 24-SMD module, 14 leads: would fit in the space of a 24-SMD module but only has 14 pins/pads. Typically, they are smaller than the through-hole components.
There are three basic types of pins (leads) for surface mount devices.
Lead Types
Gull wing leads: Enable the most pins per inch when compared to J-lead types but they are more fragile. Easy to inspect for defects after soldering.
J-Leads: Less pins per inch than gull wing leads but they are stronger and less susceptible to breakage.
Flat Leads:
Must be protectively packaged to prevent damage to leads. Leads must be formed into a gull shape prior to use with a separate piece of equipment. Due to that they are the least popular type of lead.
Package / Case: Indicates the type of protective case used on an electronic component to allow easy handling, installation, and protection. This selection was determined to be the closest industry standard applicable to the suppliers device packaging. Typically it is best to check the actual dimensions from the datasheet rather than depend on this terminology when designing your circuit.
ProductExamples
| MFR PART # | MXD1210CPA+ |
|---|---|
| DIGI-KEY PART # | MXD1210CPA±ND |
| MANUFACTURER | Analog Devices Inc./Maxim Integrated |
| DESCRIPTION | IC CNTRLR NVRAM 8-DIP |
| DATASHEET | Click Here |
| MFR PART # | BQ2201SN-N |
|---|---|
| DIGI-KEY PART # | 296-47692-ND |
| MANUFACTURER | Texas Instruments |
| DESCRIPTION | IC SRAM NONVOLATILE CNTRLR 8SOIC |
| DATASHEET | Click Here |
| MFR PART # | BQ2204ASNTR |
|---|---|
| DIGI-KEY PART # | BQ2204ASNTR-ND |
| MANUFACTURER | Texas Instruments |
| DESCRIPTION | IC X4 SRAM NONVOL CTRLR 16-SOIC |
| DATASHEET | Click Here |