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Home > Products > Integrated Circuits (ICs) > Embedded > CPLDs (Complex Programmable Logic Devices)

Microchip Technology ATF1504AS-15JC44

Name: ATF1504AS-15JC44
Brand: Microchip Technology
SKU: ATF1504AS-15JC44
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ATF1504AS-15JC44

Manufacturer:: Microchip Technology

Category:: CPLDs (Complex Programmable Logic Devices)

Package:: 44-LCC (J-Lead)

Datasheet:: ATF1504AS-15JC44.pdf

Description:: IC CPLD 64MC 15NS 44PLCC

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Product details

Overview

ATF1504AS-15JC44 from Microchip (formerly Atmel) is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 64 macrocells, 5 product terms per macrocell (expandable to 40), 7.5 ns pin-to-pin delay, and support for 125 MHz registered operation. It implements flexible logic functions in industrial control, legacy interface bridging, and board-level glue logic.

For engineers reviewing the ATF1504AS-15JC44 datasheet, ATF1504AS-15JC44 pinout, ATF1504AS-15JC44 application, or ATF1504AS-15JC44 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for CPLD-based system integration.

Technical Context

The ATF1504AS-15JC44 uses a global bus architecture feeding up to 40 signals into each logic block's switch matrix, enabling high routing utilization and successful pin-locked design iterations. Its macrocell supports D/T/latch flip-flops, programmable output slew rate, open-collector outputs, and buried registered feedback within combinatorial outputs.

It integrates three global clock inputs (GCLK1–GCLK3), input transition detection (ITD) on clocks/I/Os, fast registered input paths, and JTAG-compliant IEEE 1149.1 boundary-scan testing. Power management includes automatic µA standby (L-version), pin-controlled 1 mA power-down, and per-macrocell reduced-power mode.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Density	64 macrocells - provides gate count equivalent to ~1500–2000 usable PLD gates for medium-complexity glue logic.
Timing Performance	7.5 ns max pin-to-pin delay (–15 speed grade) - enables reliable operation at 100+ MHz system clock domains.
Operating Voltage	5.0 V ±5% (VCCIO/VCCINT) - compatible with legacy TTL/CMOS 5 V systems without level-shifting.
Max Clock Frequency	125 MHz registered operation - supports synchronous state machines and data-path timing in industrial controllers.
Program/Erase Cycles	10,000 cycles - ensures field-upgradable logic configuration over extended product lifecycles.
Data Retention	20 years - guarantees nonvolatile configuration persistence without battery backup.
ESD Protection	2000 V HBM - meets industrial handling requirements without external protection circuitry.

Pinout & Package

ATF1504AS-15JC44 is packaged in a 44-lead TQFP (Thin Quad Flat Package) with 0.8 mm lead pitch, JEDEC MS-026 compliant, body size 10 × 10 mm. Pin 1 is marked by a corner notch or dot; top-side marking includes "ATF1504AS-15JC44" and date code.

Pin	Circuit Role	Design Meaning
1	I/O/TDI	JTAG Test Data Input or general-purpose I/O; dual-function pin used for ISP programming and logic I/O.
3	I/O	Bi-directional user I/O with programmable slew rate and pin-keeper option.
4	GND	Ground reference for core and I/O power domains; must be low-inductance connected to PCB ground plane.
5	PD1/I/O	Power-down control input or I/O; when asserted high, reduces ICC to <10 mA while latching internal states.
7	TMS/I/O	JTAG Test Mode Select or I/O; pull-up enabled by design option to ensure valid TAP state on power-up.
9	VCC	5 V supply for both core logic and I/O buffers; requires local 0.1 µF ceramic decoupling.
11	I/O	General-purpose I/O with ITD circuit for edge-triggered event capture on asynchronous inputs.
13	I/O/TDO	JTAG Test Data Output or I/O; outputs shifted boundary-scan data during BST or ISP verification.
15	I/O	Configurable as registered or combinatorial output; supports open-collector mode for wired-OR bus interfaces.
17	I/O/TCK	JTAG Test Clock or I/O; synchronous clock input for boundary-scan and ISP operations.
19	GND	Second ground pin - improves noise immunity and reduces ground bounce in high-speed switching.
21	I/O	Macrocell with programmable "pin-keeper" - holds last driven state when floating, eliminating external pull-ups.
23	I/O	Supports fast registered input path from product term - enables low-latency interrupt sampling.
25	VCC	Secondary VCC pin - supplies additional current path for I/O bank stability under heavy switching load.
27	I/O	Global clock input GCLK2/OE2/I - selectable as clock, output enable, or general input via fuse configuration.
29	GCLR/I	Global clear input - asynchronously resets all registers; can be OR'd with product term for conditional reset.
31	I/OE1	Output enable input - controls tri-state behavior of multiple macrocell outputs simultaneously.
33	GCLK1/I	Primary global clock input - drives register clocks across all macrocells; supports 125 MHz operation.
35	GND	Third ground pin - critical for maintaining signal integrity on high-frequency clock and data paths.
37	GCLK3/I/O	Third global clock or I/O - enables multi-clock domain designs (e.g., async FIFO handshaking).
39	I/O	Supports combinatorial output with registered feedback - allows self-timed logic loops without external routing.
41	I/O	PCI-compliant drive strength option - configurable for 24 mA sink/source to meet PCI electrical specs.
42	I/O	Input transition detection (ITD) enabled - generates strobes on rising/falling edges for event-driven logic.
43	VCC	Third VCC pin - ensures stable voltage distribution across full 44-pin footprint under dynamic load.
44	I/O	Security fuse control - once programmed, prevents readback of fuse pattern while preserving User Signature access.

Key Features

Feature	Design Value
In-System Programmability (ISP)	Enables firmware updates and logic revisions without device removal using standard JTAG interface and SVF files.
Flexible Macrocell Architecture	Each macrocell supports D/T/latch flip-flops, XOR-based arithmetic, buried feedback, and cascade logic chains up to 40 product terms.
Advanced Power Management	Three-tier power control: automatic µA standby, pin-triggered 1 mA power-down, and per-macrocell reduced-power bit for fine-grained optimization.
Programmable Pin-keeper Circuits	Eliminates need for external pull-up resistors on unused inputs/I/Os, reducing BOM cost and DC power draw.
PCI Compliance	Meets PCI Local Bus Specification Rev. 2.2 electrical requirements including drive strength, skew, and noise margins.

Applications

Industrial Motion Control	Legacy Interface Bridging
Use Scenario: Real-time coordination of stepper motor step/direction signals, encoder feedback decoding, and safety interlock monitoring in CNC equipment. IC Role / Device Role / Timing Role: Glue logic CPLD implementing synchronous state machines with deterministic 7.5 ns propagation and 125 MHz register clocking. Use Value: Replaces discrete 74-series logic and PALs, reducing component count while supporting field-upgradable motion profiles via ISP.	Use Scenario: Translating between ISA bus peripherals and modern microcontroller buses in medical diagnostic instruments. IC Role / Device Role / Timing Role: Protocol translator and address decoder with programmable timing windows for 8-bit/16-bit ISA cycles. Use Value: Enables reuse of legacy sensor modules without redesigning host controller firmware or PCB layout.
Automated Test Equipment (ATE)	Secure Boot Configuration
Use Scenario: Generating precise stimulus patterns and capturing response signatures across DUT pins in semiconductor wafer testers. IC Role / Device Role / Timing Role: High-speed pattern generator with ITD-enabled edge capture and low-skew output drivers meeting PCI timing specs. Use Value: Delivers sub-10 ns timing resolution and deterministic latency, critical for parametric test accuracy at production volumes.	Use Scenario: Storing and validating immutable boot configuration bits (e.g., secure boot keys, memory map settings) before MCU initialization. IC Role / Device Role / Timing Role: Nonvolatile configuration store with security fuse protection and 20-year data retention. Use Value: Prevents unauthorized firmware modification while allowing authorized field updates via JTAG ISP with signature verification.

Industrial Motion Control

Legacy Interface Bridging

Use Scenario: Real-time coordination of stepper motor step/direction signals, encoder feedback decoding, and safety interlock monitoring in CNC equipment.

IC Role / Device Role / Timing Role: Glue logic CPLD implementing synchronous state machines with deterministic 7.5 ns propagation and 125 MHz register clocking.

Use Value: Replaces discrete 74-series logic and PALs, reducing component count while supporting field-upgradable motion profiles via ISP.

Use Scenario: Translating between ISA bus peripherals and modern microcontroller buses in medical diagnostic instruments.

IC Role / Device Role / Timing Role: Protocol translator and address decoder with programmable timing windows for 8-bit/16-bit ISA cycles.

Use Value: Enables reuse of legacy sensor modules without redesigning host controller firmware or PCB layout.

Automated Test Equipment (ATE)

Secure Boot Configuration

Use Scenario: Generating precise stimulus patterns and capturing response signatures across DUT pins in semiconductor wafer testers.

IC Role / Device Role / Timing Role: High-speed pattern generator with ITD-enabled edge capture and low-skew output drivers meeting PCI timing specs.

Use Value: Delivers sub-10 ns timing resolution and deterministic latency, critical for parametric test accuracy at production volumes.

Use Scenario: Storing and validating immutable boot configuration bits (e.g., secure boot keys, memory map settings) before MCU initialization.

IC Role / Device Role / Timing Role: Nonvolatile configuration store with security fuse protection and 20-year data retention.

Use Value: Prevents unauthorized firmware modification while allowing authorized field updates via JTAG ISP with signature verification.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
XCR3064XL-10VQ44C	64 macrocells, 3.3 V only, 10 ns tPD, no 5 V tolerance	Requires level-shifting in 5 V systems; lacks PD1/PD2 power-down pins	Select when migrating to lower-voltage designs with existing Xilinx toolchain support.
EPM3064ATC44-10N	64 macrocells, 3.3 V core/5 V I/O tolerant, 10 ns tPD, different JTAG BSDL	Higher static current (ICC1 = 50 mA vs. 105 mA std mode); no pin-keeper option	Choose for Intel Quartus compatibility and mixed-voltage I/O flexibility where pin-keeper is not required.

Compared with XCR3064XL-10VQ44C and EPM3064ATC44-10N, the ATF1504AS-15JC44 uniquely supports native 5 V operation, integrated pin-keeper circuits eliminating external resistors, and dual-mode power-down (µA standby + 1 mA pin-controlled), making it optimal for legacy industrial systems requiring zero-BOM-change upgrades.

Availability

ATF1504AS-15JC44 is available at Aetrix Electronics and suitable for industrial motion control, legacy interface bridging, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for ATF1504AS-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

Microchip Technology acquired Atmel in 2016 and maintains full support for the ATF1504AS family, including datasheets, programming tools, and long-term supply commitments for industrial-grade CPLDs.

The ATF1504AS product line was designed for high-reliability, field-upgradable glue logic in industrial automation, test instrumentation, and aerospace subsystems where nonvolatile configuration and JTAG ISP are mandatory.

FAQ

What is the maximum operating frequency of the ATF1504AS-15JC44?

The ATF1504AS-15JC44 supports registered operation up to 125 MHz, as confirmed by its –15 speed grade rating and AC characteristic fCNT = 125 MHz (tCNT = 8 ns minimum global clock period). This applies to synchronous logic using GCLK1–GCLK3 inputs with all macrocells configured in registered mode and reduced-power features disabled. The ATF1504AS-15JC44 achieves this performance while maintaining 7.5 ns pin-to-pin delay in combinatorial paths.

Does the ATF1504AS-15JC44 support 3.3 V I/O operation?

No, the ATF1504AS-15JC44 is a 5 V-only device: its VCCIO and VCCINT specifications require 5.0 V ±5%, with no 3.3 V tolerance. It cannot operate reliably at 3.3 V supply levels. For 3.3 V systems, engineers should consider alternatives like the ATF1504ASL-15JC44 (low-power variant with same 5 V operation) or migrate to newer 3.3 V CPLDs. The ATF1504AS-15JC44 datasheet explicitly lists "5V ±5%" under DC Operating Conditions with no 3.3 V entry.

How does the pin-keeper feature work on the ATF1504AS-15JC44?

The ATF1504AS-15JC44's programmable pin-keeper circuit holds the last driven logic state (high or low) on any input or I/O pin when left floating, preventing indeterminate voltage levels that cause shoot-through current and noise. Enabled per-pin in the design file, it eliminates external pull-up/pull-down resistors. This feature remains active during ISP programming, preserving system stability - a capability confirmed in the "ISP Programming Protection" section of the ATF1504AS-15JC44 datasheet.

Can the ATF1504AS-15JC44 be used in PCI-compliant designs?

Yes, the ATF1504AS-15JC44 is explicitly PCI-compliant per Peripheral Component Interconnect Specification Rev. 2.2. It delivers 24 mA sink/source drive strength, low output-to-output skew, and meets PCI voltage/current curves without external components. Its programmable high-drive mode operates without increasing output delay or pin capacitance - a key advantage documented in the "PCI Compliance" section of the ATF1504AS-15JC44 datasheet.

What JTAG signals are available on the ATF1504AS-15JC44 44-pin TQFP package?

The ATF1504AS-15JC44 44-pin TQFP exposes four dedicated JTAG pins: TDI (Pin 1), TMS (Pin 7), TCK (Pin 17), and TDO (Pin 13). Pins TMS and TDI include optional internal pull-up resistors enabled via design configuration. These pins support IEEE 1149.1 boundary-scan testing and in-system programming (ISP) using SVF files. When JTAG is disabled in the fuse map, all four become general-purpose I/Os - a capability verified in the "JTAG-BST/ISP Overview" section of the ATF1504AS-15JC44 datasheet.

ATF1504AS-15JC44 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: ATF15xx

Package/Case:: 44-LCC (J-Lead)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Programmable Type:: In System Programmable (min 10K program/erase cycles)

Delay Time tpd(1) Max:: 15 ns

Voltage Supply - Internal:: 4.75V ~ 5.25V

Number of Logic Elements/Blocks:: -

Number of Macrocells:: 64

Number of Gates:: -

Number of I/O:: 32

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 44-PLCC (16.6x16.6)

ATF1504AS-15JC44 FAQ

1.How can I place an order for ATF1504AS-15JC44 through Aetrix?

Please submit a Request for Quotation (RFQ) for ATF1504AS-15JC44 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ATF1504AS-15JC44 reliable?

The price and inventory of ATF1504AS-15JC44 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1504AS-15JC44 is usually 5 days.

3.What payment methods are accepted for ATF1504AS-15JC44?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1504AS-15JC44 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ATF1504AS-15JC44?

ATF1504AS-15JC44 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ATF1504AS-15JC44 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ATF1504AS-15JC44?

For technical support, including ATF1504AS-15JC44 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1504AS-15JC44 requirements.

6.How does Aetrix verify that ATF1504AS-15JC44 is sourced from the original manufacturer or authorized distributors?

All ATF1504AS-15JC44 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ATF1504AS-15JC44 meets industry standards.

7.What is the process for return or replacement of ATF1504AS-15JC44?

All ATF1504AS-15JC44 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1504AS-15JC44, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ATF1504AS-15JC44 part is unused and in its original packaging.

Return procedure for ATF1504AS-15JC44:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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