This Product Selection Guide contains information to help select products in the Configuration PROMs for FPGAs category on DigiKey.com
Configuration PROMs (Programmable Read-Only Memory) are companion devices to FPGAs, used to store a user’s desired configuration for the latter during periods when the device is powered down. The specific memory technology used varies and includes types which can be electrically erased and re-written, rendering their characterization as “read-only” devices somewhat anachronistic.
SelectionCharacteristics
DigiKey Programmable: For verified products, DigiKey can program/flash your compiled code or configuration variables prior to shipping. For unverified products, please inquire with ProgCent.Techs@digikey.com.
Programmable Type: The method or technology used to store the configuration data that defines the logic and functionality of the FPGA
Memory Size: The amount of memory available on the device.
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.
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or 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 # | AT17LV256-10NU |
|---|---|
| DIGI-KEY PART # | AT17LV256-10NU-ND |
| MANUFACTURER | Microchip Technology |
| DESCRIPTION | IC EEPROM FPGA 256KB 8-SOIC |
| DATASHEET | Click Here |
| MFR PART # | EPCQ16ASI8N |
|---|---|
| DIGI-KEY PART # | 544-3440-ND |
| MANUFACTURER | Intel |
| DESCRIPTION | IC CONFIG DEVICE 16MBIT 8SOIC |
| DATASHEET | Click Here |
| MFR PART # | AT17F040-30CU |
|---|---|
| DIGI-KEY PART # | AT17F040-30CU-ND |
| MANUFACTURER | Microchip Technology |
| DESCRIPTION | IC FLASH CONFIG 4M 8LAP |
| DATASHEET | Click Here |