Microchip Technology ATF15XX-SAJ44

Overview

ATF15XX-SAJ44 from Microchip Technology (formerly Atmel) is a 44-lead PLCC socket adapter board designed to interface ATF15xx family Complex Programmable Logic Devices (CPLDs) with the Atmel CPLD Development/Programmer Board (P/N: ATF15xx-DK2). It enables in-system programming (ISP) and prototyping of 44-pin PLCC-packaged ATF15xx CPLDs-including ATF1502AS/ASL, ATF1504AS/ASL, and ATF1504ASV/ASVL-via IEEE 1149.1a-compliant JTAG, while providing access to all non-JTAG I/O pins through expansion terminal holes.

For engineers reviewing the ATF15XX-SAJ44 datasheet, ATF15XX-SAJ44 pinout, ATF15XX-SAJ44 application, or ATF15XX-SAJ44 equivalent, this adapter supports rapid evaluation of logic doubling CPLD designs, facilitates hardware debugging using on-board 8-segment LEDs and push-button switches, and ensures voltage-compatible ISP programming (3.3V or 5V) when used with the VCC Select jumper on the host development board.

Technical Context

The ATF15XX-SAJ44 is a passive mechanical and electrical interface-not an IC or active component-designed exclusively for the ATF15xx CPLD family. It maps the 44-pin PLCC footprint of target devices to the dual-row header interface (JPLEFT/JPRIGHT) of the ATF15xx-DK2 development board, preserving signal integrity for JTAG (TCK/TMS/TDI/TDO), dedicated inputs (GCLR, OE1, GCLK1/GCLK2), power (VCC, GND), and all user I/O pins.

It routes signals per Table 2-1 of the official user guide: GCLR connects to PLCC Pin 1; OE1 to Pin 44; GCLK1 to Pin 43; GCLK2 to Pin 2; and JTAG signals map to Pins 1 (TDI), 32 (TDO), 7 (TMS), and 26 (TCK). Expansion terminal holes provide direct access to all 40 non-JTAG I/O pins, with silkscreen labeling matching PLCC pin numbers.

Key Specifications

Availability

ATF15XX-SAJ44 is available at Aetrix Electronics and suitable for CPLD prototyping, ISP programming validation, logic doubling architecture evaluation, and educational lab setups requiring stable component supply and long-term tooling continuity.

Supply support for ATF15XX-SAJ44 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

Microchip Technology acquired Atmel in 2016 and maintains legacy PLD product support, documentation, and design tools for the ATF15xx family under its broad logic portfolio.

The ATF15XX-SAJ44 belongs to Atmel's CPLD Development/Programmer Kit accessory line, engineered to accelerate time-to-test for logic-intensive digital systems using industry-standard JTAG ISP and hands-on hardware verification.

FAQ

What is the primary function of the ATF15XX-SAJ44?

The ATF15XX-SAJ44 is a passive 44-lead PLCC socket adapter board that mechanically and electrically interfaces ATF15xx CPLDs with the Atmel CPLD Development/Programmer Board (ATF15xx-DK2). It enables in-system programming, functional prototyping, and I/O signal access-without active components, firmware, or configuration memory. The ATF15XX-SAJ44 itself does not perform logic, store data, or generate clocks.

Which ATF15xx devices are compatible with the ATF15XX-SAJ44?

The ATF15XX-SAJ44 supports all 44-pin PLCC variants in the ATF15xx family, including ATF1502AS/ASL, ATF1504AS/ASL, ATF1504ASV/ASVL, ATF1502AE/AEL, and ATF1504AE/AEL-across all speed grades. Compatibility is confirmed by pin mapping in Table 2-1 of the official user guide (Rev. 3300A–PLD–08/02), which defines exact PLCC pin assignments for JTAG, GCLR, OE1, GCLK1/GCLK2, and I/O signals.

Does the ATF15XX-SAJ44 include level-shifting or voltage translation?

No. The ATF15XX-SAJ44 provides direct, unbuffered signal routing between the PLCC socket and the host development board. Voltage compatibility (3.3V or 5V) is managed entirely by the VCC Select jumper on the ATF15xx-DK2 board-not by the ATF15XX-SAJ44. Users must configure the host board's VCC jumper to match the target CPLD's supply voltage before programming or operation.

How are the 8-segment LED displays connected when using the ATF15XX-SAJ44?

When the ATF15XX-SAJ44 is mounted on the ATF15xx-DK2 board, the eight 8-segment LEDs connect to specific PLCC pins as defined in Table 2-1: DSP1–DSP8 segments link to PLCC Pins 24–41 (e.g., 3/C → Pin 24, 5/D → Pin 8, 7/G → Pin 30). All LED anodes tie to VCC; cathodes drive low-active outputs-so CPLD I/O must be configured as active-low to illuminate segments. No rework or soldering is required.

Can the ATF15XX-SAJ44 be used standalone without the ATF15xx-DK2 board?

No. The ATF15XX-SAJ44 has no power regulation, clock source, JTAG controller, or programming interface. It requires mating with the ATF15xx-DK2 development board (or a custom board replicating its JPLEFT/JPRIGHT header layout and signal definitions) to provide VCC, GND, JTAG signals, oscillator output, push-button switch connections, and LED drivers. It is not a self-contained programmer or evaluation module.