Microchip Technology ATF1502ASV-15JC44

Overview

ATF1502ASV-15JC44 from Atmel (now Microchip) is a high-performance, electrically erasable Complex Programmable Logic Device (CPLD) with 32 macrocells, 5 product terms per macrocell (expandable to 40), 15 ns maximum pin-to-pin delay, and operation up to 77 MHz in registered mode. It supports in-system programming via IEEE 1149.1 JTAG and delivers PCI-compliant logic integration for legacy interface bridging and control plane consolidation.

For engineers reviewing the ATF1502ASV-15JC44 datasheet, ATF1502ASV-15JC44 pinout, ATF1502ASV-15JC44 application, or ATF1502ASV-15JC44 equivalent, key selection criteria include its 44-pin TQFP package, 3.0–3.6 V supply range, industrial temperature rating (−40°C to +85°C), JTAG boundary-scan compliance, and programmable power-down capability via PD1/PD2 pins.

Technical Context

The ATF1502ASV-15JC44 implements a flexible macrocell architecture with five functional sections per macrocell: product term generation and multiplexing, OR/XOR/cascade logic, D/T-latch-configurable flip-flop, output select/enable, and logic array inputs. Its global bus carries all I/O and buried feedback signals, feeding a switch matrix that selects up to 40 signals per logic block.

Each macrocell supports combinatorial or registered outputs with independent output enable, slew rate control, open-collector option, and buried registered feedback - enabling dual-latch behavior within a single macrocell. Three dedicated global clock pins (GCLK1–3), global clear (GCLR), and two power-down pins (PD1, PD2) provide deterministic timing and low-power control.

Key Specifications

Pinout & Package

ATF1502ASV-15JC44 is packaged in a 44-pin Thin Quad Flat Package (TQFP), 10 mm × 10 mm, 0.8 mm pitch, lead-free and RoHS-compliant. The package provides 32 user I/O pins, four dedicated input pins (GCLR, OE1, GCLK1, GCLK3), three global clock inputs (GCLK1–3), two power-down pins (PD1, PD2), four JTAG pins (TDI, TMS, TCK, TDO), four VCC pins, and four GND pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XCR3064XL-10VQ44C and LC4032V-75TN44C, the ATF1502ASV-15JC44 uniquely combines industrial temperature qualification, integrated power-down control, pin-keeper logic, and full IEEE 1149.1 boundary-scan in a 44-pin TQFP - making it optimal for legacy system upgrades requiring field-programmable reliability under thermal stress.

Availability

ATF1502ASV-15JC44 is available at Aetrix Electronics and suitable for industrial control systems, legacy interface adapters, embedded state machine implementations, and field-upgradeable logic applications requiring stable component supply across extended lifecycle programs.

Supply support for ATF1502ASV-15JC44 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 - now part of Microchip Technology - is a semiconductor manufacturer specializing in non-volatile memory, microcontrollers, and programmable logic solutions for industrial, automotive, and communications markets.

The ATF1502ASV product line was designed for high-reliability, in-system programmable logic replacement of TTL/SSI/MSI and classic PLDs in space-constrained, thermally demanding embedded systems.

FAQ

What is the operating voltage range for the ATF1502ASV-15JC44?

The ATF1502ASV-15JC44 operates over a supply voltage range of 3.0 V to 3.6 V, fully compatible with standard 3.3 V logic systems. This range ensures stable functionality across variations in power rail tolerance and load conditions, and is validated for both commercial and industrial temperature grades. The ATF1502ASV-15JC44 does not support 5 V operation or mixed-voltage I/O.

Does the ATF1502ASV-15JC44 support in-system programming, and what interface is used?

Yes, the ATF1502ASV-15JC44 supports in-system programming (ISP) exclusively through the IEEE Std. 1149.1 JTAG interface using the four dedicated pins TDI, TMS, TCK, and TDO. This enables full configuration, verification, and boundary-scan testing without removing the device from the PCB. The ATF1502ASV-15JC44 is fully described by its BSDL file and interoperates with standard JTAG tools.

What is the purpose of the PD1 and PD2 pins on the ATF1502ASV-15JC44?

The PD1 and PD2 pins on the ATF1502ASV-15JC44 serve as active-high power-down control inputs. When either pin is driven high (and the power-down feature is enabled in the design file), the device enters a low-current standby mode drawing ≤0.75 mA while retaining all register and output states. During power-down, input signals other than PD1/PD2 are blocked, and pin-keeper circuits prevent floating I/Os. The ATF1502ASV-15JC44 cannot use these pins for logic functions when power-down is active.

How many global clock inputs does the ATF1502ASV-15JC44 provide, and how are they assigned?

The ATF1502ASV-15JC44 provides three dedicated global clock inputs: GCLK1 (pin 37), GCLK2/OE2 (pin 40), and GCLK3 (pin 35). These pins feed independent clock domains to the macrocell array and support simultaneous multi-clock operation. GCLK1 is typically used as the primary clock; GCLK2 doubles as global output enable OE2; GCLK3 offers a third timing domain for asynchronous subsystems. All three are accessible to every macrocell via the global bus.

Is the ATF1502ASV-15JC44 still in production, and what is its lifecycle status?

The ATF1502ASV-15JC44 is a mature, discontinued product - last-time-buy occurred in 2005 per Atmel's official ordering documentation. However, Aetrix Electronics maintains verified, traceable inventory sourced from authorized legacy channels, with full electrical and marking validation. The ATF1502ASV-15JC44 remains supported for obsolescence management, repair, and long-life industrial program continuity.