Microchip Technology ATDH2222-

Overview

ATDH2222 from Atmel is a 20-pin PLCC adapter designed for use with the ATDH2200 AT17 Series Configurator Programming Kit to enable in-system programming of 20-pin PLCC-packaged serial configuration PROMs. It supports AT17LVxx and AT17Fxx devices, provides direct socket-to-connector interface, and features gold-plated contacts for reliable signal integrity during configuration bitstream loading.

For engineers reviewing the ATDH2222 datasheet, ATDH2222 pinout, ATDH2222 application, or ATDH2222 equivalent, this adapter enables rapid FPGA configuration validation, field reprogramming of legacy PLCC-based AT17 PROMs, and compatibility testing across AT17 family variants without custom cabling or soldering.

Technical Context

The ATDH2222 bridges the ATDH2200 programming controller to 20-pin PLCC packages via a zero-insertion-force (ZIF) socket and 20-conductor ribbon cable interface. It maps all essential configuration signals - including DATA, DCLK, INIT, PROGRAM, and CCLK - with 1:1 pin correspondence and maintains signal timing compliance per AT17 series specification.

No active circuitry or level translation is integrated; the adapter operates passively at 3.3 V or 5 V depending on target AT17 device voltage grade. Mechanical alignment ensures full insertion depth and contact retention for repeated programming cycles.

Key Specifications

Availability

ATDH2222 is available at Aetrix Electronics and suitable for FPGA configuration validation, legacy system reprogramming, and AT17 PROM qualification requiring stable component supply across industrial, aerospace, and test equipment design programs.

Supply support for ATDH2222 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Atmel Corporation was a U.S.-based semiconductor manufacturer specializing in microcontrollers, FPGAs, nonvolatile memory, and programmable logic solutions before its acquisition by Microchip Technology in 2016.

The ATDH2222 belongs to Atmel's FPGA Configuration Hardware product line, developed specifically to support field-programmable gate array configuration workflows using AT17-series serial PROMs in legacy PLCC packaging.

FAQ

What is the primary function of the ATDH2222 adapter?

The ATDH2222 adapter enables in-system programming of 20-pin PLCC-packaged AT17LVxx and AT17Fxx serial configuration PROMs using the ATDH2200 programming kit. It provides mechanical and electrical interface compatibility without signal conditioning or voltage conversion, ensuring direct bitstream loading into FPGA configuration memory.

Which AT17 devices are confirmed compatible with the ATDH2222?

The ATDH2222 is explicitly validated for AT17LV010A, AT17LV020A, AT17LV040A, AT17F040, and AT17F080 in 20-pin PLCC packages. Compatibility is limited to these part numbers and excludes SOIC, TQFP, or other package variants - no cross-package functionality is supported.

Does the ATDH2222 require external power or drivers?

No, the ATDH2222 is a passive adapter with no onboard power regulation, level shifters, or active components. It draws no current and relies entirely on the ATDH2200 controller for signal drive strength and voltage levels, operating at either 3.3 V or 5 V depending on the connected AT17 device.

Can the ATDH2222 be used with non-Atmel FPGAs or configuration PROMs?

No - the ATDH2222 is designed exclusively for Atmel's AT17-series configuration PROMs and their associated FPGA families (AT40K/AT6000). Pinout, timing, and command protocol are specific to Atmel's configuration architecture and not interoperable with Xilinx, Altera, or third-party PROMs.

Is the ATDH2222 still supported for new designs?

While Atmel discontinued the ATDH2222 after the 2016 Microchip acquisition, Aetrix Electronics maintains verified inventory and technical documentation for legacy support. The ATDH2222 remains functional for maintaining and repairing existing AT17-based systems where PLCC-20 PROMs are deployed.