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Microchip Technology ATF1504AS-7AX44
- Part No.:
- ATF1504AS-7AX44
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1504AS-7AX44.pdf
- Description:
- IC CPLD 64MC 7.5NS 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:454
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Product details
Overview
ATF1504AS-7AX44 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, 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 deterministic timing are critical.
For engineers reviewing the ATF1504AS-7AX44 datasheet, ATF1504AS-7AX44 pinout, ATF1504AS-7AX44 application, or ATF1504AS-7AX44 equivalent, this page delivers verified package mapping (44-lead TQFP), confirmed JTAG ISP compliance (IEEE 1149.1a), PCI electrical compatibility, 3.3V/5.0V I/O flexibility, and validated power-down behavior with PD1/PD2 control - all essential for embedded system integration and BOM continuity planning.
Technical Context
The ATF1504AS-7AX44 employs a global bus architecture feeding up to 40 signals into each logic block's switch matrix, enabling high routing resource utilization and successful pin-locked design revisions. Its macrocell structure integrates OR/XOR/CASCADE logic, configurable D/T/latch flip-flops, and foldback feedback to support complex sum-of-products with up to 40-term fan-in across four independent logic chains.
It supports three global clock inputs (GCLK1–GCLK3), input transition detection (ITD) on clocks/I/Os, fast registered input from product terms, and programmable pin-keeper circuits. The device uses electrically-erasable EEPROM technology with 10,000 program/erase cycles, 20-year data retention, and security fuse protection - all verified per Rev. 0950N–PLD–07/02.
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 (–7 speed grade) - enables synchronous logic at ≤125 MHz registered frequency |
| I/O Voltage Support | 3.3V or 5.0V I/O pins - allows direct interfacing with mixed-voltage systems without level shifters |
| Power Management | 10 µA standby current (L version) - reduces idle power in battery-backed or low-power monitoring applications |
| Programmability | In-system programmable via IEEE 1149.1a JTAG - permits field updates and eliminates socket programming requirements |
| Reliability | 20-year data retention, 10,000 program/erase cycles, 2000V ESD protection - ensures long-term deployment stability |
| PCI Compliance | Meets PCI electrical specifications - supports direct connection to PCI bus without external drivers |
Pinout & Package
ATF1504AS-7AX44 is packaged in a 44-lead Thin Quad Flat Package (TQFP), measuring 10 mm × 10 mm × 1.4 mm, with 0.8 mm lead pitch and exposed pad for thermal dissipation. Pin numbering follows standard TQFP top-view convention (pin 1 marked by dot or bevel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 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 | Bi-directional I/O | Configurable as input, output, or bidirectional; supports slew rate control, open-collector option, and pin-keeper circuit |
| 44 | I/O/TDI | JTAG Test Data Input - primary serial input for boundary-scan and ISP programming |
| 33 | I/O/TDO | JTAG Test Data Output - serial output for boundary-scan readback and ISP verification |
| 23 | I/O/TCK | JTAG Test Clock - synchronizes JTAG state machine and data shifting |
| 7 | TMS/I/O | JTAG Test Mode Select - controls TAP controller state transitions; also usable as general I/O when JTAG disabled |
| 11 | GND | Ground reference - two dedicated GND pins (pins 11 and 22) ensure stable return path for I/O and core logic |
| 10, 20, 32 | VCC | Core and I/O supply - pins 10 and 20 are VCCIO (I/O voltage); pin 32 is VCCINT (core voltage) - supports 3.3V or 5.0V operation |
| 37 | GCLK1/I | Global Clock 1 input - primary clock source for registered logic; also configurable as general input |
| 39 | GCLR/I | Global Clear input - asynchronous reset for all macrocell flip-flops; also configurable as general input |
| 36 | OE1/I | Output Enable 1 - controls output enable for groups of macrocells; also configurable as general input |
| 38 | GCLK2/OE2/I | Global Clock 2 / Output Enable 2 - dual-function pin supporting second clock domain or OE control |
| 41 | GCLK3/I/O | Global Clock 3 / I/O - third clock input with bidirectional capability; enables multi-clock domain designs |
| 27 | PD1/I/O | Power-down 1 control - active-high signal to enter <10 mA power-down mode; disables logic but retains register states |
| 14 | PD2/I/O | Power-down 2 control - redundant or alternate power-down trigger; both PD1 and PD2 can be used simultaneously |
Key Features
| Feature | Design Value |
|---|---|
| Flexible Macrocell Architecture | Each of 64 macrocells supports D/T/latch flip-flops, XOR-based arithmetic, buried registered feedback, and combinatorial outputs - enabling efficient state machine and glue logic implementation |
| Enhanced Routing Resources | Global bus with 68+ signals + regional foldback bus allows >95% logic utilization and successful pin-locked design iterations without PCB respin |
| Programmable Power Control | Per-macrocell reduced-power bit, automatic µA standby, and pin-controlled <10 mA power-down mode - cuts dynamic and static power in burst-mode or sleep-state applications |
| JTAG Boundary-scan & ISP | Fully compliant with IEEE 1149.1a; includes BSDL model, SAMPLE/PRELOAD/EXTEST modes, and secure ISP programming without device removal |
| Security & Traceability | One-time programmable security fuse prevents unauthorized readback; 16-bit user signature register stores project ID, revision, or date - accessible even with fuse blown |
| Robust I/O Interface | 3.3V/5.0V I/O tolerance, programmable slew rate, open-collector option, and pin-keeper circuits eliminate need for external pull-ups and reduce system noise |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Bridging |
|---|---|
Use Scenario: Adding isolated digital I/O channels to programmable logic controllers using existing 24V or 5V backplane interfaces. IC Role / Device Role / Timing Role: Glue logic CPLD implementing address decoding, strobe synchronization, and level translation between microcontroller and opto-isolated I/O modules. Use Value: Enables deterministic 7.5 ns response time and 125 MHz register clocking for real-time I/O scanning, while reducing component count versus discrete TTL solutions. |
Use Scenario: Interfacing modern microcontrollers to legacy ISA, PC/104, or VMEbus peripherals requiring strict timing and drive strength. IC Role / Device Role / Timing Role: Timing-critical bus controller managing wait-state insertion, address latching, and PCI-compliant drive for 33 MHz bus cycles. Use Value: Delivers PCI electrical compliance and <10 ns setup/hold margins - eliminating external bus transceivers and simplifying layout in space-constrained embedded boards. |
| Field-Upgradeable Firmware Logic | Power-Sensitive Sensor Hub Control |
Use Scenario: Implementing reconfigurable boot logic and configuration registers in medical or test equipment requiring post-deployment firmware updates. IC Role / Device Role / Timing Role: In-system programmable logic handling JTAG-based field updates, secure signature validation, and hardware-enforced boot sequence control. Use Value: Enables zero-downtime field upgrades via ISP without removing the device; security fuse prevents reverse engineering of proprietary initialization sequences. |
Use Scenario: Managing sensor multiplexing, ADC trigger sequencing, and low-power wake-up logic in battery-operated environmental monitoring nodes. IC Role / Device Role / Timing Role: Low-power CPLD coordinating ultra-low-current sleep (10 µA standby), fast wake-on-event (ITD detection), and burst-mode data acquisition. Use Value: Reduces average system current by >90% versus FPGA alternatives; pin-keeper circuits prevent floating inputs during deep sleep, eliminating leakage-induced battery drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD-based logic integration applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XCR3064XL-7VQ44C | 64 macrocells, 7 ns speed, 3.3V-only I/O, no 5V tolerance; lower ICC1 (25 mA std mode) | Lacks 5V I/O compatibility and PCI drive; requires external level shifters for mixed-voltage systems | Select when 3.3V-only operation and lowest possible active current are prioritized over legacy interface support |
| EPM3064ATC44-7 | 64 macrocells, 7 ns speed, 3.3V core/5V-tolerant I/O; non-EEPROM (SRAM + config flash); requires external configuration device | No in-system programmability without external SPI flash; higher boot latency; no security fuse | Select when higher density variants (e.g., EPM3128) are needed later, or when Intel toolchain ecosystem is mandated |
Compared with XCR3064XL-7VQ44C and EPM3064ATC44-7, the ATF1504AS-7AX44 uniquely combines 5V/3.3V I/O tolerance, true single-chip ISP without external memory, EEPROM-based nonvolatility, and PCI-compliant drive - making it the only drop-in solution for retrofitting legacy industrial controllers with field-upgradable logic.
Availability
ATF1504AS-7AX44 is available at Aetrix Electronics and suitable for industrial PLC expansion, legacy bus bridging, field-upgradeable firmware logic, and power-sensitive sensor hub control requiring stable component supply across extended product lifecycles.
Supply support for ATF1504AS-7AX44 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 devices.
The ATF1504AS series was designed as a high-reliability, EEPROM-based CPLD for mission-critical industrial and automotive-adjacent applications requiring zero-config nonvolatility, deterministic timing, and robust in-system programmability - distinct from SRAM-based FPGAs or flash-based alternatives.
FAQ
What is the operating temperature range for ATF1504AS-7AX44?
The ATF1504AS-7AX44 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the DC Operating Conditions table (page 11) of Rev. 0950N–PLD–07/02, and applies to both 3.3V and 5.0V I/O configurations. The device meets full AC timing performance across this range at the –7 speed grade.
Does ATF1504AS-7AX44 support 5V-tolerant I/O when powered at 3.3V?
Yes, ATF1504AS-7AX44 supports 5V-tolerant I/O pins even when VCCIO = 3.3V. Per the DC Characteristics table (page 11), VIH(max) = VCCIO + 0.3V and absolute maximum rating allows +7.0V on I/O pins - enabling safe interfacing with 5V logic families without external level shifters. This is a key differentiator from many 3.3V-only CPLDs.
How is the security fuse implemented in ATF1504AS-7AX44?
The ATF1504AS-7AX44 includes a one-time programmable security fuse that, once blown, inhibits readback of the internal fuse pattern. However, the 16-bit User Signature register remains fully accessible regardless of fuse state - allowing traceability and version tracking. Programming the fuse does not affect functionality, only intellectual property protection.
Can ATF1504AS-7AX44 operate with only one power supply voltage?
No. ATF1504AS-7AX44 requires separate VCCINT (core) and VCCIO (I/O) supplies. For 5.0V operation, both are 5.0V ±5%; for 3.3V operation, VCCIO is 3.0–3.6V while VCCINT remains 5.0V. This dual-supply architecture enables mixed-voltage I/O while maintaining core logic integrity - explicitly defined in the DC Operating Conditions section.
What JTAG instructions are supported by ATF1504AS-7AX44?
ATF1504AS-7AX44 supports five IEEE 1149.1a JTAG instructions: SAMPLE/PRELOAD, EXTEST, BYPASS, IDCODE, and HIGHZ. These enable full boundary-scan testing, device identification, and ISP programming. The BSDL file fully describes the instruction register and boundary-scan cell behavior - required for automated test equipment integration.
ATF1504AS-7AX44 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 44-TQFP
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Verified
- Programmable Type:
- In System Programmable (min 10K program/erase cycles)
- Delay Time tpd(1) Max:
- 7.5 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)
ATF1504AS-7AX44 FAQ
1.How can I place an order for ATF1504AS-7AX44 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1504AS-7AX44 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-7AX44 reliable?
The price and inventory of ATF1504AS-7AX44 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1504AS-7AX44 is usually 5 days.
3.What payment methods are accepted for ATF1504AS-7AX44?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1504AS-7AX44 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1504AS-7AX44?
ATF1504AS-7AX44 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1504AS-7AX44 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-7AX44?
For technical support, including ATF1504AS-7AX44 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1504AS-7AX44 requirements.
6.How does Aetrix verify that ATF1504AS-7AX44 is sourced from the original manufacturer or authorized distributors?
All ATF1504AS-7AX44 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-7AX44 meets industry standards.
7.What is the process for return or replacement of ATF1504AS-7AX44?
All ATF1504AS-7AX44 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1504AS-7AX44, 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-7AX44 part is unused and in its original packaging.
Return procedure for ATF1504AS-7AX44:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1504AS-7AX44 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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