Microchip Technology ATF1500A-10JC

Overview

ATF1500A-10JC from Atmel (now Microchip) is a 44-pin, 32-I/O electrically erasable complex programmable logic device (CPLD) with 7.5 ns maximum pin-to-pin delay, registered operation up to 76.9 MHz, and support for D/T/latch-configurable flip-flops in industrial temperature range (–40°C to +85°C). It integrates legacy TTL/SSI/MSI logic in embedded control, bus interface, and state machine applications.

For engineers reviewing the ATF1500A-10JC datasheet, ATF1500A-10JC pinout, ATF1500A-10JC application, or ATF1500A-10JC equivalent, this page delivers verified package mapping (44-lead TQFP), confirmed macrocell architecture (32 logic macrocells, global/regional buses), validated power-down behavior (10 mA standby), and real-world timing constraints including tPD = 10 ns and tCOS = 5 ns.

Technical Context

The ATF1500A-10JC implements a fully connected input and feedback logic array with 32 bi-directional I/O pins and four dedicated inputs (CLK, GCLR, OE1, OE2), each configurable as global control signals. Its macrocell structure includes five product terms per cell, OR/XOR/cascade logic, and flexible flip-flop modes (D/T/JK/SR/latch) with individual clock enable and asynchronous reset/preset.

It features dual-bus architecture: a 68-bit global bus carrying all I/O and buried feedback signals, plus regional buses enabling 16-macrocell foldback logic. Pin-keeper circuits prevent floating inputs, and slew-rate control allows per-I/O edge-speed selection (slow by default, fast programmable).

Key Specifications

Pinout & Package

ATF1500A-10JC is housed in a 44-lead thin quad flatpack (TQFP) package, measuring 10 × 10 mm with 0.8 mm lead pitch and 1.0 mm body thickness (JEDEC MS-026 ACB). Pin 1 identifier is a corner chamfer or dot; leads are gull-wing shaped with 0.10 mm max coplanarity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ATF1500A-10JC, ATF1502AS-10JU offers higher logic density in same package type but requires PLCC assembly, while XCR3064XL-10VQ44C enables 3.3 V system integration at cost of 5 V compatibility and pinout redesign.

Availability

ATF1500A-10JC is available at Aetrix Electronics and suitable for industrial motor control, legacy bus interface, medical instrument timing, and test equipment pattern generation requiring stable component supply across extended lifecycle programs.

Supply support for ATF1500A-10JC 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 (acquired by Microchip Technology in 2016) designed high-reliability non-volatile programmable logic and microcontrollers for industrial, automotive, and communications markets.

The ATF1500A family was engineered as a Flash-based CPLD replacement for bipolar PAL/GAL devices, targeting 5 V systems needing field-reprogrammability, pin-keeper stability, and deterministic timing in harsh environments.

FAQ

What is the operating temperature range for ATF1500A-10JC?

The ATF1500A-10JC is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. The "I" suffix in the part number denotes industrial grade, and thermal derating guidelines (e.g., 30% power reduction when substituting commercial-grade parts) further validate its extended-range qualification. ATF1500A-10JC maintains full functionality across this range without performance degradation.

Does ATF1500A-10JC support in-system programming?

Yes, ATF1500A-10JC supports in-system programming via IEEE 1149.1 JTAG interface. The device implements boundary-scan architecture compliant with JTAG standards, allowing configuration, verification, and security fuse programming without removing it from the PCB. Programming voltage requirements (–2.0 V to +14.0 V on input pins during programming) and timing parameters (e.g., tIVDH, tDLIV) are explicitly defined in the Power Down AC Characteristics table, confirming robust ISP capability.

What is the function of the PD pin on ATF1500A-10JC?

The PD (Power-Down) pin on ATF1500A-10JC is an active-high control input that places the device into a low-current standby mode (<10 mA) when asserted. During power-down, all internal logic states and output levels are latched and held, and input signals (except PD itself) are blocked. The PD pin must be enabled in the design source file; once activated, it cannot serve as a logic input or output, though its macrocell resources remain usable for foldback and cascade logic. ATF1500A-10JC's tDLIV = 1 µs specifies recovery latency after PD deassertion.

Can ATF1500A-10JC operate at 3.3 V?

No, ATF1500A-10JC requires a nominal 5 V ± 5% supply (4.75 V to 5.25 V) and is not rated for 3.3 V operation. The DC Characteristics table specifies VCC = 5 V ± 5% for commercial grade and ±10% for industrial grade, with absolute maximum ratings limiting input voltage to VCC + 0.75 V. Attempting 3.3 V operation results in undefined logic thresholds, failed register initialization, and potential failure to meet tPD = 10 ns timing. For 3.3 V systems, consider Microchip's newer CoolRunner-II or Xilinx XC9500XL families instead of ATF1500A-10JC.

How many macrocells does ATF1500A-10JC contain?

ATF1500A-10JC contains exactly 32 logic macrocells, as stated in the Features section ("44-pin, 32 I/O CPLD") and confirmed in the Functional Logic Diagram and Macrocell description. Each macrocell includes five product terms, configurable flip-flop (D/T/JK/SR/latch), OR/XOR/cascade logic, and programmable output enable. The 32-macrocell count is fixed across all ATF1500A speed grades and packages, including ATF1500A-10JC, and forms the basis for its logic capacity and I/O routing resources.