Microchip Technology ATF1508ASV-15QI100

Overview

ATF1508ASV-15QI100 from Microchip Technology (formerly Atmel) is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 128 macrocells, 15 ns maximum pin-to-pin delay, and operation across 3.0V–3.6V. It supports registered logic up to 77 MHz, features three global clock inputs, and delivers in-system programmability via IEEE 1149.1 JTAG for embedded control logic integration in industrial PLCs and legacy interface bridging.

For engineers reviewing the ATF1508ASV-15QI100 datasheet, ATF1508ASV-15QI100 pinout, ATF1508ASV-15QI100 application, or ATF1508ASV-15QI100 equivalent, key selection criteria include its 100-lead TQFP package, 5-product-term-per-macrocell architecture with expandable 40-term cascade, programmable slew rate, and dual power-down pins (PD1/PD2) enabling sub-5 mA standby current in industrial temperature range (–40°C to +85°C).

Technical Context

The ATF1508ASV-15QI100 implements a hierarchical routing architecture with a global bus feeding all 128 macrocells and a regional foldback bus supporting up to 21-product-term sum terms per logic region. Its macrocell structure integrates five product terms, OR/XOR/cascade logic, configurable D/T/latch flip-flops, and individual output enable control - enabling buried registered feedback within combinatorial outputs.

It supports JTAG boundary-scan (IEEE 1149.1a), Fast In-System Programming (ISP), PCI compliance, and advanced power management including automatic 5 µA standby ('L' version), pin-controlled 100 µA standby, and per-macrocell reduced-power mode with tRPA adder (10–13 ns). The device includes VCC power-up reset with selectable hysteresis and ITD circuits on global clocks, inputs, and I/Os.

Key Specifications

Pinout & Package

ATF1508ASV-15QI100 is packaged in a 100-lead Thin Quad Flat Package (TQFP), measuring 14 mm × 14 mm × 1.4 mm, with 0.5 mm lead pitch and Pb/Halide-free (RoHS-compliant) finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CPLD applications.

Compared with XCR3256XL-10TQ144I and EPM7128SLC84-10, ATF1508ASV-15QI100 uniquely combines industrial temperature operation, dual PD pins for hardware-triggered low-power states, and VCC power-up reset hysteresis tuning - making it optimal for ruggedized, field-upgradable embedded control where reliability and configurability are prioritized over raw macrocell count.

Availability

ATF1508ASV-15QI100 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface bridging, and motor drive control logic requiring stable component supply across extended lifecycle commitments.

Supply support for ATF1508ASV-15QI100 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 full support for the ATF1508ASV family of electrically-erasable CPLDs, ensuring long-term documentation, software tools, and technical assistance.

The ATF1508ASV series was designed for high-reliability, in-system programmable glue logic in industrial automation, test equipment, and legacy system modernization - emphasizing robustness, field-upgradability, and seamless integration with 3.3V microcontrollers.

FAQ

What is the maximum operating frequency supported by ATF1508ASV-15QI100?

The ATF1508ASV-15QI100 supports registered logic operation up to 77 MHz and achieves a maximum clock frequency of 100 MHz per AC characteristics table. Its 15 ns pin-to-pin delay and 13 ns minimum global clock period enable timing closure in high-speed control loops. Actual achievable frequency depends on design complexity, routing, and use of reduced-power mode (which adds tRPA delay).

Does ATF1508ASV-15QI100 support in-system programming (ISP)?

Yes, ATF1508ASV-15QI100 supports IEEE 1149.1-compliant in-system programming via its four JTAG pins (TDI, TMS, TCK, TDO). ISP allows full configuration without device removal, enabling field firmware updates and rapid prototyping. The JTAG interface can be disabled in the design file to reclaim those pins as general-purpose I/O if needed.

How does the power-down feature work on ATF1508ASV-15QI100?

ATF1508ASV-15QI100 provides two dedicated power-down pins (PD1 and PD2). When either pin is driven high, the device enters a low-power state drawing less than 5 mA. All internal logic states and registered outputs are latched and held; high-Z outputs remain high-Z. Input signals (except PD pins) are blocked, and pin-keeper circuits prevent floating. The feature is enabled in the design source file.

What package type is used for ATF1508ASV-15QI100?

ATF1508ASV-15QI100 uses a 100-lead Thin Quad Flat Package (TQFP) with 0.5 mm lead pitch, 14 mm × 14 mm body size, and RoHS-compliant Pb/halide-free finish. This package offers superior thermal performance and board-level reliability compared to PLCC variants, and is compatible with standard surface-mount assembly processes.

Is ATF1508ASV-15QI100 compatible with industrial temperature requirements?

Yes, ATF1508ASV-15QI100 is rated for industrial temperature operation from –40°C to +85°C. Its electrical specifications - including ICC1 standby current (5 µA in 'L' mode), VIH/VIL thresholds, and timing parameters - are fully guaranteed across this range. The VCC power-up reset hysteresis option further enhances reliability in noisy, wide-voltage-rail industrial environments.