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

Microchip Technology ATF1504ASL-20JC84

Name: ATF1504ASL-20JC84
Brand: Microchip Technology
SKU: ATF1504ASL-20JC84
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ATF1504ASL-20JC84

Manufacturer:: Microchip Technology

Category:: CPLDs (Complex Programmable Logic Devices)

Package:: 84-LCC (J-Lead)

Datasheet:: ATF1504ASL-20JC84.pdf

Description:: IC CPLD 64MC 20NS 84PLCC

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Product details

Overview

ATF1504ASL-20JC84 from Microchip Technology (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, 125 MHz registered operation, and JTAG-based in-system programmability. It serves as a reconfigurable logic fabric for glue logic consolidation, state machine control, and interface bridging in industrial control and legacy system upgrades.

For engineers reviewing the ATF1504ASL-20JC84 datasheet, ATF1504ASL-20JC84 pinout, ATF1504ASL-20JC84 application, or ATF1504ASL-20JC84 equivalent, this device offers verified PCI compliance, dual-voltage I/O (3.3 V/5.0 V), programmable slew rate, pin-keeper circuits, and three global clock inputs - critical for deterministic timing in mixed-signal embedded systems.

Technical Context

The ATF1504ASL-20JC84 implements a hierarchical architecture with a global bus feeding up to 40 signals into each logic block's switch matrix, plus regional foldback buses enabling 16-term cascade logic per region. Its macrocells support D/T/latch flip-flops, individual output enable via product terms, and combinatorial outputs with registered feedback - all configurable per macrocell.

It integrates IEEE 1149.1–1990/1149.1a–1993 boundary-scan testing, automatic µA standby ('L' version), pin-controlled 1 mA power-down mode, and programmable ITD circuits on global clocks, inputs, and I/Os. The -20 speed grade guarantees ≤20 ns tCNT (minimum global clock period) and supports 125 MHz internal clock frequency under industrial conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Density	64 macrocells - sufficient for replacing multiple 74-series TTL/MSI functions or classic PLDs in compact control logic.
Speed Grade	-20 - guarantees maximum 20 ns minimum global clock period (f_CNT = 50 MHz) and 125 MHz registered operation at industrial temperature.
I/O Voltage Support	3.3 V or 5.0 V - enables direct interfacing with both legacy 5 V and modern low-voltage peripherals without level shifters.
Power Management	Automatic µA standby + pin-controlled 1 mA power-down - reduces quiescent current by >99% during idle periods without external circuitry.
JTAG Compliance	IEEE Std. 1149.1-1990 & 1149.1a-1993 - enables full boundary-scan testability and ISP programming using standard tools and SVF files.
PCI Compliance	Fully compliant - meets PCI electrical requirements including drive strength, skew, and noise immunity for add-in card designs.
Data Retention	20 years - ensures nonvolatile configuration integrity across extended product lifecycles in unattended equipment.

Pinout & Package

ATF1504ASL-20JC84 is packaged in an 84-lead PLCC (Plastic Leaded Chip Carrier) with 0.050" lead pitch. The package is leaded, surface-mount compatible, and rated for industrial temperature (-40°C to +85°C).

Pin	Circuit Role	Design Meaning
1–11, 13–22, 24–32, 34–43, 45–54, 56–65, 67–76, 78–84	I/O	Bi-directional logic pins supporting configurable input/output, registered/combinatorial modes, slew rate control, and pin-keeper option.
12, 23, 33, 44, 55, 66, 77	GND	Ground reference for VCCIO and VCCINT domains; eight dedicated GND pins ensure low-impedance return paths.
26, 37, 48, 59, 70, 81	VCCIO	I/O power supply pins - accept either 3.3 V ±0.3 V or 5.0 V ±5% to configure I/O voltage level independently of core logic.
38, 49, 60	GCLK1/I, GCLK2/OE2/I, GCLK3/I/O	Three global clock inputs - support synchronous logic distribution; GCLK2 doubles as output enable control signal.
39	GCLR/I	Global asynchronous clear input - resets all macrocell registers simultaneously; configurable as active-high or product-term gated.
40	OE1/I	Dedicated output enable input - controls group-level tri-state behavior; may be assigned per-macrocell via product term.
17, 28	PD1/I/O, PD2/I/O	Pin-controlled power-down inputs - assert high to enter <10 mA standby; disables logic transitions while preserving register and output states.
18, 29, 41, 52	TDI/I/O, TMS/I/O, TDO/I/O, TCK/I/O	JTAG boundary-scan interface - enables in-system programming and IEEE 1149.1 test access; pull-up optional on TMS/TDI.

Key Features

Feature	Design Value
Programmable Pin-keeper Circuits	Prevents floating inputs/I/Os by latching last-driven state - eliminates need for external pull-ups and reduces system noise and DC power loss.
Per-Macrocell Reduced-Power Bit	Disables unused logic resources within individual macrocells - cuts dynamic power consumption proportionally without affecting timing-critical paths.
Three Independent Global Clock Inputs	Enables multi-clock domain designs (e.g., control, data, and interface clocks) with deterministic skew and no routing congestion on global nets.
Input Transition Detection (ITD)	Detects edges on global clocks, inputs, and I/Os - supports asynchronous event capture and wake-on-input functionality without consuming macrocell logic.
VCC Power-up Reset with Hysteresis Options	Ensures reliable state machine initialization at power-on; selectable small/large hysteresis prevents false resets during brown-out conditions.
Security Fuse + 16-bit User Signature	Protects design IP from unauthorized readback; user-accessible signature space stores revision, project ID, or calibration data independent of fuse state.

Applications

Industrial PLC I/O Expansion	Legacy Bus Interface Bridging
Use Scenario: Adding isolated digital I/O channels to programmable logic controllers in factory automation cabinets. IC Role / Device Role / Timing Role: Configurable glue logic handling address decoding, strobe generation, and status multiplexing between microcontroller and opto-isolated I/O banks. Use Value: Replaces 8–12 discrete TTL chips with single ATF1504ASL-20JC84, reducing BOM count, PCB area, and assembly cost while enabling field-upgradable logic.	Use Scenario: Interfacing modern ARM-based controllers to legacy ISA or VMEbus peripherals in test equipment and avionics upgrades. IC Role / Device Role / Timing Role: Protocol translator and timing adapter managing bus arbitration, wait-state insertion, and signal level conversion between mismatched clock domains. Use Value: Achieves sub-20 ns setup/hold timing margins using programmable global clocks and fast array logic - avoids custom ASIC development.
PCI Add-in Card Control Logic	Automated Test Equipment (ATE) Pattern Generator
Use Scenario: Implementing configuration, status monitoring, and interrupt management logic on PCI-based data acquisition cards. IC Role / Device Role / Timing Role: PCI-compliant control hub managing BAR decoding, INT# assertion, and DMA handshake coordination with host CPU. Use Value: Meets PCI specification for drive strength, skew, and noise immunity without external buffers - simplifies layout and passes compliance testing.	Use Scenario: Generating synchronized stimulus waveforms and capturing response data in semiconductor wafer sort testers. IC Role / Device Role / Timing Role: High-speed pattern sequencer with deterministic 125 MHz registered outputs and programmable edge alignment across 64 I/Os. Use Value: Delivers <7.5 ns pin-to-pin delay and <1 ns output-to-output skew - enables precise timing margin validation at production test speeds.

Industrial PLC I/O Expansion

Legacy Bus Interface Bridging

Use Scenario: Adding isolated digital I/O channels to programmable logic controllers in factory automation cabinets.

IC Role / Device Role / Timing Role: Configurable glue logic handling address decoding, strobe generation, and status multiplexing between microcontroller and opto-isolated I/O banks.

Use Value: Replaces 8–12 discrete TTL chips with single ATF1504ASL-20JC84, reducing BOM count, PCB area, and assembly cost while enabling field-upgradable logic.

Use Scenario: Interfacing modern ARM-based controllers to legacy ISA or VMEbus peripherals in test equipment and avionics upgrades.

IC Role / Device Role / Timing Role: Protocol translator and timing adapter managing bus arbitration, wait-state insertion, and signal level conversion between mismatched clock domains.

Use Value: Achieves sub-20 ns setup/hold timing margins using programmable global clocks and fast array logic - avoids custom ASIC development.

PCI Add-in Card Control Logic

Automated Test Equipment (ATE) Pattern Generator

Use Scenario: Implementing configuration, status monitoring, and interrupt management logic on PCI-based data acquisition cards.

IC Role / Device Role / Timing Role: PCI-compliant control hub managing BAR decoding, INT# assertion, and DMA handshake coordination with host CPU.

Use Value: Meets PCI specification for drive strength, skew, and noise immunity without external buffers - simplifies layout and passes compliance testing.

Use Scenario: Generating synchronized stimulus waveforms and capturing response data in semiconductor wafer sort testers.

IC Role / Device Role / Timing Role: High-speed pattern sequencer with deterministic 125 MHz registered outputs and programmable edge alignment across 64 I/Os.

Use Value: Delivers <7.5 ns pin-to-pin delay and <1 ns output-to-output skew - enables precise timing margin validation at production test speeds.

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 speed grade, 3.3 V only, CoolRunner-II architecture with lower static current (10 µA typical).	Lacks PCI compliance, no 5 V I/O support, no pin-controlled power-down - unsuitable for mixed-voltage or PCI add-in card use.	Select when lowest static power and 3.3 V-only operation are prioritized over voltage flexibility and PCI certification.
EPM3064ATC100-10N	64 macrocells, 10 ns speed grade, 3.3 V core/5 V tolerant I/O, MAX 3000A architecture with higher density routing.	No built-in ITD circuits, no VCC power-up reset hysteresis options, no programmable slew rate - less suited for event-driven wake-up or noise-sensitive environments.	Select when higher routing utilization and Intel toolchain compatibility outweigh need for advanced power management and transition detection.

Compared with XCR3064XL-10VQG44C and EPM3064ATC100-10N, the ATF1504ASL-20JC84 uniquely combines 5 V/3.3 V I/O flexibility, PCI compliance, pin-keeper circuits, and three global clocks - making it the only option among the three qualified for industrial backplane interface and legacy system retrofit applications requiring mixed-voltage robustness.

Availability

ATF1504ASL-20JC84 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface bridging, and PCI add-in card control logic requiring stable component supply across extended product lifecycles.

Supply support for ATF1504ASL-20JC84 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 of electrically-erasable CPLDs, including documentation, programming tools, and long-term supply assurance.

The ATF1504AS series was designed for high-reliability, field-upgradable logic in industrial, aerospace, and telecom infrastructure - emphasizing nonvolatile configuration, JTAG ISP, and robust power management for unattended operation.

FAQ

What is the operating temperature range for the ATF1504ASL-20JC84?

The ATF1504ASL-20JC84 is rated for industrial temperature operation from –40°C to +85°C. This range is validated per the device's DC and AC specifications, including ICC1 standby current (10 µA max in 'L' mode), tPD1 propagation delay (≤20 ns), and VCCIO tolerance (3.0 V–3.6 V or 4.5 V–5.5 V). The 'L' suffix explicitly denotes the industrial-grade variant with enhanced power management features.

Does the ATF1504ASL-20JC84 support both 3.3 V and 5.0 V I/O interfaces simultaneously?

Yes, the ATF1504ASL-20JC84 supports mixed-voltage I/O operation: VCCIO pins accept either 3.3 V (3.0–3.6 V) or 5.0 V (4.5–5.5 V), and all I/Os are configurable per-pin for voltage level. This allows direct connection to both 3.3 V microcontrollers and 5 V legacy peripherals without external level shifters - a key capability confirmed in the DC Characteristics table and Pin Function Descriptions.

How does the pin-keeper feature function on the ATF1504ASL-20JC84?

The ATF1504ASL-20JC84 includes programmable pin-keeper circuits on all inputs and I/Os. When enabled, these circuits latch the last-driven logic state (high or low) if the pin becomes floating - preventing indeterminate voltage levels that cause shoot-through current and EMI. This eliminates external pull-up resistors and their associated DC power loss, as documented in the "Programmable Pin-keeper Option" section.

Can the ATF1504ASL-20JC84 be programmed in-system without removing it from the PCB?

Yes, the ATF1504ASL-20JC84 supports full in-system programming (ISP) via its 4-pin JTAG interface (TCK, TMS, TDI, TDO), compliant with IEEE Std. 1149.1-1990 and 1149.1a-1993. Programming can be performed using SVF files, Atmel-provided tools, or third-party JTAG controllers - enabling field updates and manufacturing flexibility without socketing or rework.

What are the key differences between the ATF1504AS and ATF1504ASL variants?

The 'L' suffix in ATF1504ASL-20JC84 denotes the low-power industrial variant: it includes automatic µA standby mode (vs. mA standby in non-L versions), enhanced ESD protection (2000 V), and guaranteed operation over –40°C to +85°C. All ATF1504ASL devices also support pin-controlled 1 mA power-down mode and VCC power-up reset hysteresis options - features not present in base ATF1504AS parts.

ATF1504ASL-20JC84 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: ATF15xx

Package/Case:: 84-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:: 20 ns

Voltage Supply - Internal:: 4.75V ~ 5.25V

Number of Logic Elements/Blocks:: -

Number of Macrocells:: 64

Number of Gates:: -

Number of I/O:: 64

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 84-PLCC (29.31x29.31)

ATF1504ASL-20JC84 FAQ

1.How can I place an order for ATF1504ASL-20JC84 through Aetrix?

Please submit a Request for Quotation (RFQ) for ATF1504ASL-20JC84 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 ATF1504ASL-20JC84 reliable?

The price and inventory of ATF1504ASL-20JC84 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1504ASL-20JC84 is usually 5 days.

3.What payment methods are accepted for ATF1504ASL-20JC84?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1504ASL-20JC84 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ATF1504ASL-20JC84?

ATF1504ASL-20JC84 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ATF1504ASL-20JC84 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 ATF1504ASL-20JC84?

For technical support, including ATF1504ASL-20JC84 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1504ASL-20JC84 requirements.

6.How does Aetrix verify that ATF1504ASL-20JC84 is sourced from the original manufacturer or authorized distributors?

All ATF1504ASL-20JC84 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 ATF1504ASL-20JC84 meets industry standards.

7.What is the process for return or replacement of ATF1504ASL-20JC84?

All ATF1504ASL-20JC84 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1504ASL-20JC84, 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 ATF1504ASL-20JC84 part is unused and in its original packaging.

Return procedure for ATF1504ASL-20JC84:

1.Submit a request within 90 days.

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

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