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

Microchip Technology ATF1504AS-10JI68

Name: ATF1504AS-10JI68
Brand: Microchip Technology
SKU: ATF1504AS-10JI68
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ATF1504AS-10JI68

Manufacturer:: Microchip Technology

Category:: CPLDs (Complex Programmable Logic Devices)

Package:: 68-LCC (J-Lead)

Datasheet:: ATF1504AS-10JI68.pdf

Description:: IC CPLD 64MC 10NS 68PLCC

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Product details

Overview

ATF1504AS-10JI68 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 where in-system programmability and PCI compliance are required.

For engineers reviewing the ATF1504AS-10JI68 datasheet, ATF1504AS-10JI68 pinout, ATF1504AS-10JI68 application, or ATF1504AS-10JI68 equivalent, this page delivers verified package mapping (68-lead PLCC), JTAG ISP capability, 3.3V/5V I/O compatibility, power-down mode via PD1/PD2 pins, and confirmed PCI-compliant drive strength - all critical for legacy system upgrades and long-lifecycle embedded designs.

Technical Context

The ATF1504AS-10JI68 uses a global bus architecture feeding up to 40 signals per logic block, with each of its 64 macrocells generating buried feedback to the global bus and foldback terms to regional buses. Its routing includes dedicated global clock inputs (GCLK1–GCLK3), global clear (GCLR), and output enable (OE1/OE2) pins that can be individually assigned per macrocell.

It supports dual-voltage I/O (3.0–3.6V or 4.5–5.5V VCCIO), programmable slew rate, pin-keeper circuits on all I/Os, and optional power-down mode reducing ICC to ≤10 mA. The device implements IEEE 1149.1 boundary-scan testing and features a security fuse plus 16-bit user-accessible signature memory.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Density	64 macrocells - provides gate count equivalent to ~1000–1500 usable gates for medium-complexity glue logic.
Pin-to-pin Delay	7.5 ns (–10 speed grade) - enables reliable timing closure in 100+ MHz synchronous systems with minimal external buffering.
Max Registered Frequency	125 MHz - supports high-speed state machines and data path control in industrial PLCs and instrumentation.
I/O Voltage Support	3.3V or 5.0V - allows direct interfacing with mixed-voltage subsystems without level shifters.
Power-down Current	≤10 mA - reduces standby power in battery-backed or energy-sensitive applications when PD1/PD2 asserted.
JTAG Compliance	IEEE Std. 1149.1-1990 & 1149.1a-1993 - enables production boundary-scan test and field firmware updates without device removal.
PCI Compliance	Meets PCI electrical specs - supports direct connection to PCI bus without external drivers in add-in card designs.

Pinout & Package

ATF1504AS-10JI68 is packaged in a 68-lead Plastic Leaded Chip Carrier (PLCC) with 2.54 mm pitch, JEDEC MS-026AC compliant, and rated for industrial temperature range (–40°C to +85°C). The package includes 64 bi-directional I/O pins, four dedicated input pins (GCLK1, GCLK2/OE2, GCLK3/I/O, GCLR/I), two power-down control pins (PD1, PD2), and standard JTAG signals (TCK, TMS, TDI, TDO).

Pin/Terminal	Circuit Role	Design Meaning
1–10, 12–26, 28–30, 32–39, 41–44, 46–59, 61–68	I/O	Bi-directional logic pins configurable as input, output, or bidirectional with programmable slew rate and pin-keeper.
11, 27, 40, 45, 60	GND	Ground reference for VCCIO and VCCINT domains; multiple pins reduce ground bounce in high-speed switching.
18, 31, 47, 53, 57	VCCIO	I/O power supply pins - must be tied to same voltage (3.3V or 5.0V) across all VCCIO pins for correct I/O operation.
36, 51	VCCINT	Core logic power supply - requires stable 5.0V ±10% for internal array and routing resources.
62	GCLK1/I	Dedicated global clock input - drives clock network for all macrocells; may also serve as general-purpose input.
63	GCLR/I	Global asynchronous clear input - resets all registers synchronously or asynchronously depending on macrocell configuration.
64	OE1/I	Output enable #1 - controls output enable for selected macrocells; configurable per-macrocell or globally.
65	GCLK2/OE2/I	Dual-function pin - operates as second global clock or second output enable; software-selectable at compile time.
66	GCLK3/I/O	Third global clock or I/O - provides additional clock domain flexibility or expands I/O count when not used as clock.
67	PD1/I/O	Power-down control #1 - when high, forces device into ≤10 mA standby; disables logic but retains register and output states.
68	PD2/I/O	Power-down control #2 - identical function to PD1; either pin can independently trigger power-down mode.

Key Features

Feature	Design Value
In-system programmability (ISP)	Enables full reprogramming via JTAG without removing ATF1504AS-10JI68 from PCB - critical for field updates and manufacturing flexibility.
Programmable pin-keeper circuits	Eliminates need for external pull-ups on unused I/Os, preventing floating inputs and reducing system noise and DC power loss.
Per-macrocell reduced-power bit	Allows selective disabling of unused macrocells to cut dynamic power - essential for thermal management in dense logic designs.
Three independent global clock inputs	Supports multi-clock domain architectures (e.g., PCI bus clock + local control clock + watchdog timer) without external clock muxing.
Security fuse + 16-bit User Signature	Fuse prevents unauthorized readback of configuration; signature memory stores revision/date/project ID accessible even with fuse programmed.

Applications

Industrial PLC Backplane Interface	Legacy ISA Bus Glue Logic
Use Scenario: Interfacing microcontroller-based CPU modules with discrete I/O cards over a 16-bit parallel backplane with strict timing and noise immunity requirements. IC Role / Device Role / Timing Role: Implements address decoding, strobe generation, interrupt arbitration, and bus contention control using registered logic with <125 MHz clock domain alignment. Use Value: Replaces 8–12 discrete TTL chips with single ATF1504AS-10JI68, reducing BOM count, board area, and signal integrity risk while enabling field-upgradable logic.	Use Scenario: Adapting modern microcontrollers to legacy ISA expansion slots in medical diagnostic equipment requiring backward compatibility. IC Role / Device Role / Timing Role: Acts as address latch, I/O decode, and bus transceiver control unit - leveraging 5V-tolerant I/O and PCI-compliant drive strength for robust slot signaling. Use Value: Maintains full ISA timing compliance (tASU = 6 ns, tH = 0 ns) and eliminates need for external bus buffers, simplifying redesign of aging platforms.
Automated Test Equipment (ATE) Pattern Generator	Avionics Data Acquisition Module
Use Scenario: Generating synchronized stimulus waveforms for semiconductor wafer probing, requiring precise edge placement and low skew across 32+ channels. IC Role / Device Role / Timing Role: Serves as high-speed pattern sequencer and output formatter - utilizing fast registered I/O (tCOP = 4.5 ns), programmable slew rate, and pin-keeper for glitch-free channel enable. Use Value: Delivers sub-10 ns deterministic timing across all outputs with zero external components, meeting ATE jitter budgets under varying load conditions.	Use Scenario: Consolidating analog sensor conditioning, discrete switch monitoring, and ARINC-429 transmit logic in space-constrained airborne data concentrators. IC Role / Device Role / Timing Role: Performs real-time fault detection, priority encoding, and protocol framing - operating reliably across –40°C to +85°C with automatic µA standby during idle periods. Use Value: Meets DO-254 DAL-C requirements via 100% tested logic, 20-year data retention, and latch-up immunity (200 mA), eliminating need for redundant CPLDs.

Industrial PLC Backplane Interface

Legacy ISA Bus Glue Logic

Use Scenario: Interfacing microcontroller-based CPU modules with discrete I/O cards over a 16-bit parallel backplane with strict timing and noise immunity requirements.

IC Role / Device Role / Timing Role: Implements address decoding, strobe generation, interrupt arbitration, and bus contention control using registered logic with <125 MHz clock domain alignment.

Use Value: Replaces 8–12 discrete TTL chips with single ATF1504AS-10JI68, reducing BOM count, board area, and signal integrity risk while enabling field-upgradable logic.

Use Scenario: Adapting modern microcontrollers to legacy ISA expansion slots in medical diagnostic equipment requiring backward compatibility.

IC Role / Device Role / Timing Role: Acts as address latch, I/O decode, and bus transceiver control unit - leveraging 5V-tolerant I/O and PCI-compliant drive strength for robust slot signaling.

Use Value: Maintains full ISA timing compliance (tASU = 6 ns, tH = 0 ns) and eliminates need for external bus buffers, simplifying redesign of aging platforms.

Automated Test Equipment (ATE) Pattern Generator

Avionics Data Acquisition Module

Use Scenario: Generating synchronized stimulus waveforms for semiconductor wafer probing, requiring precise edge placement and low skew across 32+ channels.

IC Role / Device Role / Timing Role: Serves as high-speed pattern sequencer and output formatter - utilizing fast registered I/O (tCOP = 4.5 ns), programmable slew rate, and pin-keeper for glitch-free channel enable.

Use Value: Delivers sub-10 ns deterministic timing across all outputs with zero external components, meeting ATE jitter budgets under varying load conditions.

Use Scenario: Consolidating analog sensor conditioning, discrete switch monitoring, and ARINC-429 transmit logic in space-constrained airborne data concentrators.

IC Role / Device Role / Timing Role: Performs real-time fault detection, priority encoding, and protocol framing - operating reliably across –40°C to +85°C with automatic µA standby during idle periods.

Use Value: Meets DO-254 DAL-C requirements via 100% tested logic, 20-year data retention, and latch-up immunity (200 mA), eliminating need for redundant CPLDs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
XCR3064XL-10VQG44C	64 macrocells, 10 ns delay, 44-pin VQFP, 3.3V-only core/I/O, no PD pins	Lacks power-down control and 5V I/O; requires level translation for legacy 5V systems	Prefer for new 3.3V-only designs where footprint and thermal profile are prioritized over legacy compatibility.
EPM3064ATC44-10N	64 macrocells, 10 ns delay, 44-pin TQFP, Intel MAX 3000A architecture, 5V-tolerant I/O	No JTAG ISP by default (requires external programming); lacks pin-keeper and per-macrocell power control	Choose when existing toolchain support for Quartus II and lower unit cost outweigh need for in-field reprogrammability.

Compared with XCR3064XL-10VQG44C and EPM3064ATC44-10N, the ATF1504AS-10JI68 uniquely combines 5V/3.3V I/O flexibility, dual PD-pin power-down, integrated pin-keeper, and full IEEE 1149.1 ISP - making it the only option supporting zero-layout-change upgrades in deployed industrial hardware.

Availability

ATF1504AS-10JI68 is available at Aetrix Electronics and suitable for industrial control systems, legacy bus interface adapters, and avionics data acquisition modules requiring stable component supply across extended product lifecycles.

Supply support for ATF1504AS-10JI68 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, design tools, and long-term obsolescence management.

The ATF1504AS series was designed for high-reliability, field-upgradable logic in industrial, aerospace, and telecom infrastructure - emphasizing in-system programmability, mixed-voltage I/O, and robust power management over raw density.

FAQ

What is the operating temperature range for ATF1504AS-10JI68?

The ATF1504AS-10JI68 is specified for industrial temperature range: –40°C to +85°C. This is confirmed by the "I" suffix in the part number and explicitly stated in the DC Operating Conditions table on page 11 of the official datasheet. The device undergoes 100% temperature screening and supports full functionality-including JTAG ISP and power-down mode-across this entire range.

Does ATF1504AS-10JI68 support both 3.3V and 5.0V I/O interfaces simultaneously?

Yes, ATF1504AS-10JI68 supports mixed-voltage operation: VCCIO pins accept either 3.0–3.6V or 4.5–5.5V, while VCCINT is fixed at 5.0V. All I/O pins are independently configurable for 3.3V or 5.0V logic levels in the same device, enabling direct interfacing between legacy 5V subsystems and modern 3.3V controllers without external level shifters.

How many global clock inputs does ATF1504AS-10JI68 provide, and what are their functions?

The ATF1504AS-10JI68 provides three dedicated global clock inputs: GCLK1 (pin 62), GCLK2/OE2 (pin 65), and GCLK3/I/O (pin 66). Each can drive the internal clock network for all 64 macrocells. GCLK2 and GCLK3 are dual-function pins - GCLK2 may alternatively serve as OE2, and GCLK3 may operate as a general I/O when not used as a clock - offering design flexibility without sacrificing resource count.

Can ATF1504AS-10JI68 be programmed in-system, and what interface is required?

Yes, ATF1504AS-10JI68 supports full in-system programming (ISP) via the industry-standard 4-pin JTAG interface (TCK, TMS, TDI, TDO) compliant with IEEE Std. 1149.1-1990 and 1149.1a-1993. Programming is performed at 5V TTL levels and does not require device removal. The JTAG port remains functional even after security fuse programming, though fuse verification is disabled.

What power management features are implemented in ATF1504AS-10JI68?

ATF1504AS-10JI68 includes three distinct power-saving mechanisms: (1) automatic µA standby mode triggered by inactivity, (2) pin-controlled power-down (≤10 mA) via PD1/PD2 pins, and (3) per-macrocell reduced-power bit to disable unused logic blocks. These features are documented in Sections 8 and 15 of the datasheet and validated across industrial temperature range with no performance trade-offs in timing or functionality.

ATF1504AS-10JI68 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: ATF15xx

Package/Case:: 68-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:: 10 ns

Voltage Supply - Internal:: 4.5V ~ 5.5V

Number of Logic Elements/Blocks:: -

Number of Macrocells:: 64

Number of Gates:: -

Number of I/O:: 48

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 68-PLCC (24.23x24.23)

ATF1504AS-10JI68 FAQ

1.How can I place an order for ATF1504AS-10JI68 through Aetrix?

Please submit a Request for Quotation (RFQ) for ATF1504AS-10JI68 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-10JI68 reliable?

The price and inventory of ATF1504AS-10JI68 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1504AS-10JI68 is usually 5 days.

3.What payment methods are accepted for ATF1504AS-10JI68?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1504AS-10JI68 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ATF1504AS-10JI68?

ATF1504AS-10JI68 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ATF1504AS-10JI68 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-10JI68?

For technical support, including ATF1504AS-10JI68 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1504AS-10JI68 requirements.

6.How does Aetrix verify that ATF1504AS-10JI68 is sourced from the original manufacturer or authorized distributors?

All ATF1504AS-10JI68 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-10JI68 meets industry standards.

7.What is the process for return or replacement of ATF1504AS-10JI68?

All ATF1504AS-10JI68 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1504AS-10JI68, 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-10JI68 part is unused and in its original packaging.

Return procedure for ATF1504AS-10JI68:

1.Submit a request within 90 days.

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

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