Advanced Mezzanine Card

Advanced Mezzanine Cards are printed circuit boards (PCBs) that follow a specification of the PCI Industrial Computers Manufacturers Group (PICMG), with more than 100 companies participating. Known as AdvancedMC, the official specification designation is AMC.x (see below). AdvancedMC is targeted to requirements for the next generation of "carrier grade" communications equipment. This series of specifications are designed to work on any carrier card (primarily AdvancedTCA) but also to plug into a backplane directly as defined by MicroTCA specification.

The AMC standard is not to be confused with other mezzanine card standards such as PCI Mezzanine Card (PMC) and FMC – FPGA Mezzanine Card.

An AdvancedMC card can use proprietary LVDS-based signaling, or one of the following AMC specifications:

There are six types of AMC cards ("Module") available. A Full-size Module is the most common, allowing up to 23.25 mm high components (from centerline of PCB). A Mid-size Module allows component heights maxed at 11.65 to 14.01 mm (depending on board location). A Compact Module allows only 8.18 mm. A special carrier card known as hybrid or cutaway carrier is required to hold one Full-size Module or two Compact-size (see connectors below). Each height is paired with a width, single or double, describing how many carrier slots the board fills. A double width card allows more component space, but does not provide any additional power or bandwidth because it only uses a single connector.

The pinout of the AMC connector is fairly complex, with up to 170 traces. There are four different lengths the traces can be, which allows hot swapping by knowing in advance which traces will become active in which order upon insertion. To help reduce cost for mass production, a card may only require the traces on one side (pins 1 to 85). The possibility of using only half the pin locations, combined with various height combinations, results in four different connector types that are available on the carrier card:

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