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Microchip Technology ATF1504ASL-20AC44
- Part No.:
- ATF1504ASL-20AC44
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1504ASL-20AC44.pdf
- Description:
- IC CPLD 64MC 20NS 44TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ATF1504ASL-20AC44 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), and 7.5 ns maximum pin-to-pin delay. It operates up to 125 MHz in registered mode, supports JTAG-based in-system programming (ISP), and targets logic consolidation in industrial control, communications interface bridging, and legacy TTL replacement applications.
For engineers reviewing the ATF1504ASL-20AC44 datasheet, ATF1504ASL-20AC44 pinout, ATF1504ASL-20AC44 application, or ATF1504ASL-20AC44 equivalent, this device offers confirmed PCI compliance, programmable slew rate and open-collector outputs, three global clock inputs, and dual power-down modes (automatic µA standby and pin-controlled 1 mA mode) - all validated for the 44-lead TQFP package.
Technical Context
The ATF1504ASL-20AC44 implements a flexible macrocell architecture with five configurable sections per macrocell: product term generation, OR/XOR/CASCADE logic, D/T/latch flip-flop, output select/enable, and logic array inputs. Each macrocell supports buried feedback to the global bus and foldback to a regional bus, enabling high-fan-in sum-of-products (up to 40 terms) and efficient arithmetic/comparison functions via XOR gating.
Its routing architecture includes a 40-signal global bus fed by all I/Os and macrocell feedbacks, plus switch matrices per logic block. Global control signals - GCLK1–GCLK3, GCLR, OE1, OE2 - are individually assignable per macrocell, and Input Transition Detection (ITD) circuits are present on global clocks, inputs, and I/Os for edge-sensitive triggering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 64 macrocells - provides gate count equivalent to ~1500–2000 usable gates for TTL/SSI/MSI replacement. |
| Timing Performance | 7.5 ns max pin-to-pin delay (–20 speed grade); 125 MHz max registered operation - enables high-speed synchronous logic in industrial timing-critical paths. |
| Power Management | Automatic µA standby ('L' version) + pin-controlled 1 mA power-down - reduces idle current by >90% vs standard mode, critical for battery-backed or low-power systems. |
| I/O Voltage Support | 3.3 V or 5.0 V I/O pins - allows direct interfacing with mixed-voltage subsystems without level shifters. |
| JTAG Compliance | IEEE Std. 1149.1-1990 and 1149.1a-1993 boundary-scan - enables production testability and field firmware updates without physical rework. |
| PCI Compliance | Fully compliant with PCI electrical specifications - supports direct connection to PCI bus without external drivers or termination adjustments. |
| Data Retention | 20-year retention after 10,000 program/erase cycles - ensures long-term reliability in unattended or mission-critical deployments. |
Pinout & Package
ATF1504ASL-20AC44 is packaged in a 44-lead Thin Quad Flat Package (TQFP) with 0.8 mm lead pitch and exposed thermal pad. The package is RoHS-compliant and rated for industrial temperature range (–40°C to +85°C).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43 | I/O/TDI/TMS/TDO/TCK/PD1/PD2/GCLKx/OE1/OE2/GCLR | Bi-directional logic I/O with JTAG ISP control, power-down triggers, global clock inputs, output enables, and global clear - all configurable per macrocell in design software. |
| 12, 23, 34, 44 | GND | Four dedicated ground pins - provide low-inductance return paths for noise-sensitive digital logic and JTAG signaling. |
| 10, 17, 26, 37 | VCC | Four VCC pins (VCCIO/VCCINT) - support independent 3.3 V or 5.0 V I/O and internal core voltage; decoupling required per pin. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Slew Rate | Per-output control (slow/fast) - reduces EMI and signal integrity issues on long traces or unterminated lines without sacrificing speed where needed. |
| Pin-keeper Circuits | Configurable on all inputs and I/Os - eliminates need for external pull-ups, prevents floating inputs, and cuts DC leakage and system noise. |
| Three Global Clock Inputs | GCLK1, GCLK2, GCLK3 - enable multi-clock domain designs (e.g., async FIFOs, clock domain crossing) with independent macrocell assignment. |
| Input Transition Detection (ITD) | On global clocks, inputs, and I/Os - allows edge-triggered logic without external Schmitt triggers or debouncing circuitry. |
| VCC Power-up Reset Option | Hysteresis-selectable (Small/Large) - ensures deterministic state machine initialization across varying supply ramp profiles. |
| Security Fuse + User Signature | One-time programmable fuse blocks readback; 16-bit user-accessible signature space - supports traceability and IP protection without disabling debug features. |
Applications
| Industrial Control Logic | PCI Interface Bridging |
|---|---|
|
Use Scenario: Replacing discrete TTL logic and PALs in PLC I/O modules and motion controller sequencers. IC Role / Device Role / Timing Role: Configurable glue logic implementing state machines, address decoding, and bus arbitration with deterministic 7.5 ns propagation. Use Value: Reduces BOM count and PCB area while supporting field-upgradable logic via JTAG ISP during maintenance cycles. |
Use Scenario: Adapting legacy parallel interfaces to PCI bus in data acquisition cards and embedded host adapters. IC Role / Device Role / Timing Role: PCI-compliant I/O buffer and protocol translator with programmable drive strength and low output skew. Use Value: Eliminates need for external PCI transceivers; meets PCI timing specs (tSU/tH, tPD) without layout tuning. |
| Communications Protocol Conversion | Legacy System Emulation |
|
Use Scenario: Translating between RS-485, SPI, and custom serial protocols in telecom line cards and base station backplanes. IC Role / Device Role / Timing Role: Synchronous logic engine with multiple global clocks and ITD-enabled edge detection for precise bit sampling. Use Value: Enables single-chip protocol adaptation with <125 MHz register throughput and programmable input hysteresis. |
Use Scenario: Emulating obsolete PLDs (e.g., AMD 22V10, Altera EP610) in avionics and medical equipment with aging hardware. IC Role / Device Role / Timing Role: Pin-compatible functional replacement with identical macrocell structure and 20-year data retention. Use Value: Restores supply chain continuity without redesign; supports legacy JEDEC fuse map migration via Atmel tools. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMD XC9572XL-10VQ44C | 72 macrocells, 5 V only, no automatic µA standby, 10 ns pin-to-pin delay | Lacks PCI compliance and programmable slew rate; requires external pull-ups | Choose when higher macrocell count is needed and 5 V-only operation is acceptable. |
| Lattice ispMACH 4064V-10T44I | 64 macrocells, 3.3 V only, 10 ns delay, no ITD circuits or VCC power-up reset hysteresis option | Not suitable for mixed-voltage or industrial reset-critical designs; lacks PD1/PD2 power-down pins | Prefer for cost-sensitive 3.3 V-only systems where JTAG ISP and PCI compliance are non-essential. |
Compared with XC9572XL-10VQ44C and ispMACH 4064V-10T44I, the ATF1504ASL-20AC44 uniquely combines 3.3/5 V I/O flexibility, µA standby, PCI compliance, and ITD - making it the only option among the three qualified for industrial temperature, mixed-voltage, and field-upgradeable PCI endpoint designs.
Availability
ATF1504ASL-20AC44 is available at Aetrix Electronics and suitable for industrial control logic, PCI interface bridging, communications protocol conversion, and legacy system emulation requiring stable component supply across extended lifecycle programs.
Supply support for ATF1504ASL-20AC44 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(L) CPLD family, including design tools, documentation, and long-term manufacturing commitments.
The ATF1504AS(L) product line was engineered for high-reliability, field-programmable logic consolidation in industrial, communications, and automotive-qualified systems - emphasizing ISP robustness, power efficiency, and mixed-voltage interoperability.
FAQ
What is the operating temperature range for the ATF1504ASL-20AC44?
The ATF1504ASL-20AC44 is rated for industrial temperature operation from –40°C to +85°C. This is confirmed in the DC Operating Conditions table of the official datasheet (Rev. 0950N–PLD–07/02), where ICC1 "L" Mode standby current is specified at both extremes. The "L" suffix explicitly denotes the industrial-grade variant with enhanced thermal stability and extended data retention.
Does the ATF1504ASL-20AC44 support both 3.3 V and 5.0 V I/O operation?
Yes, the ATF1504ASL-20AC44 supports dual I/O voltage operation: VCCIO can be configured for either 3.0–3.6 V or 4.75–5.25 V, as verified in the DC Characteristics table. This allows direct interfacing with mixed-voltage subsystems - for example, connecting to 3.3 V FPGAs and 5 V microcontrollers simultaneously - without external level shifters.
How does the power-down mode function on the ATF1504ASL-20AC44?
The ATF1504ASL-20AC44 offers two power-down modes: automatic µA standby (enabled by default in 'L' version) and pin-controlled 1 mA mode using PD1 or PD2. When active, internal logic states and outputs are latched, and inputs (except PD pin) are blocked. AC characteristics during power-down - including tIVDH and tDLIV - are fully specified in the datasheet for design validation.
Is the ATF1504ASL-20AC44 PCI-compliant, and what does that mean for system design?
Yes, the ATF1504ASL-20AC44 is explicitly stated as PCI-compliant in the Features section and validated with PCI voltage-to-current curves. This means its I/O buffers meet PCI specification requirements for drive strength, timing (tSU/tH), and output skew - enabling direct connection to PCI bus segments without additional transceivers or layout compensation.
Can the JTAG pins on the ATF1504ASL-20AC44 be repurposed as general I/O?
Yes - JTAG functionality (TDI, TMS, TDO, TCK) is a programmable option. If JTAG boundary-scan or ISP is disabled in the design file, those four pins become standard bi-directional I/Os. The datasheet confirms this in the "JTAG-BST/ISP Overview" section and notes pull-up options on TMS/TDI are also design-selectable.
ATF1504ASL-20AC44 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 44-TQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- 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:
- 32
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-TQFP (10x10)
ATF1504ASL-20AC44 FAQ
1.How can I place an order for ATF1504ASL-20AC44 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1504ASL-20AC44 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-20AC44 reliable?
The price and inventory of ATF1504ASL-20AC44 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1504ASL-20AC44 is usually 5 days.
3.What payment methods are accepted for ATF1504ASL-20AC44?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1504ASL-20AC44 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1504ASL-20AC44?
ATF1504ASL-20AC44 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1504ASL-20AC44 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-20AC44?
For technical support, including ATF1504ASL-20AC44 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1504ASL-20AC44 requirements.
6.How does Aetrix verify that ATF1504ASL-20AC44 is sourced from the original manufacturer or authorized distributors?
All ATF1504ASL-20AC44 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-20AC44 meets industry standards.
7.What is the process for return or replacement of ATF1504ASL-20AC44?
All ATF1504ASL-20AC44 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1504ASL-20AC44, 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-20AC44 part is unused and in its original packaging.
Return procedure for ATF1504ASL-20AC44:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1504ASL-20AC44 Tags
-
5M40ZE64C5N
Intel
-
ATF1502ASV-15AU44
Microchip Technology
-
5M80ZE64C5N
Intel
-
5M80ZT100C5N
Intel
-
ATF1502AS-10AU44
Microchip Technology
-
ATF1502AS-10JU44
Microchip Technology
-
5M80ZE64I5N
Intel
-
5M80ZT100I5N
Intel
-
LC4032V-75TN48C
Lattice Semiconductor Corporation
-
ATF1504ASV-15AU44
Microchip Technology
-
ATF1504AS-10JU44
Microchip Technology
-
5M160ZE64C5N
Intel
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