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Microchip Technology ATF1504ASL-25AU44
- Part No.:
- ATF1504ASL-25AU44
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1504ASL-25AU44.pdf
- Description:
- IC CPLD 64MC 25NS 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:328
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Product details
Overview
ATF1504ASL-25AU44 from Microchip Technology (formerly Atmel) is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 64 macrocells, 7.5 ns pin-to-pin delay, and support for 125 MHz registered operation. It features in-system programmability via IEEE 1149.1 JTAG, three global clock inputs, and operates at 3.3V or 5.0V I/O voltage. Used in legacy industrial control logic replacement and PCI-compliant interface glue logic.
For engineers reviewing the ATF1504ASL-25AU44 datasheet, ATF1504ASL-25AU44 pinout, ATF1504ASL-25AU44 application, or ATF1504ASL-25AU44 equivalent, key selection criteria include its 44-pin TQFP package, -25 speed grade (7.5 ns max tPD), L-version automatic µA standby power management, and JTAG boundary-scan compliance per IEEE 1149.1a-1993.
Technical Context
The ATF1504ASL-25AU44 implements a flexible macrocell architecture with five product terms per macrocell-expandable to 40 via cascade logic-and supports D/T/latch-configurable flip-flops with individual register control and output enable. Its global bus feeds all 64 macrocells and 68 possible I/O signals, enabling high-utilization routing.
It integrates three dedicated global clock pins (GCLK1–GCLK3), input transition detection (ITD) circuits on clocks/I/Os, and programmable pin-keeper circuits to prevent floating inputs. The device supports both combinatorial and registered outputs with buried feedback, and includes VCC power-up reset with selectable hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 64 macrocells - provides gate count equivalent to ~1000–1500 usable gates for TTL/SSI/MSI replacement. |
| Max Pin-to-pin Delay | 7.5 ns (–25 speed grade) - enables reliable operation in 125 MHz registered logic paths. |
| Global Clock Frequency | 125 MHz max - supports high-speed synchronous control in industrial timing-critical applications. |
| Supply Voltage | 3.0–3.6 V or 4.75–5.25 V I/O - dual-voltage compatibility simplifies integration with mixed 3.3V/5V systems. |
| Standby Current | 10 µA (automatic "L" mode) - eliminates need for external power gating in battery-backed or low-power monitoring systems. |
| JTAG Compliance | IEEE 1149.1-1990 & 1149.1a-1993 - enables standardized boundary-scan test and ISP without custom tooling. |
| PCI Compliance | Meets PCI electrical specifications - allows direct connection to PCI bus without external driver buffers. |
Pinout & Package
ATF1504ASL-25AU44 is packaged in a 44-lead Thin Quad Flat Package (TQFP), 10 mm × 10 mm, 0.8 mm pitch. Pin 1 is marked by a dot or beveled corner; top view shown in datasheet Rev. 0950N–PLD–07/02.
| Pin/Terminal | 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 | Bi-directional logic I/O; four dedicated JTAG pins (TDI, TMS, TDO, TCK) for ISP and boundary-scan testing. |
| 12, 23, 35 | GND | Ground reference for core and I/O domains - three separate GND pins reduce ground bounce in high-speed switching. |
| 10, 16, 24, 36 | VCC | Power supply for I/O banks - four VCC pins ensure stable voltage delivery across 44-pin layout. |
| 44 | GCLK3/I/O | Third global clock input or general-purpose I/O - enables triple-clock domain synchronization in state machines. |
| 34 | GCLK2/OE2/I | Second global clock input or output enable signal - supports independent OE control per logic block. |
| 33 | GCLR/I | Global asynchronous clear input - resets all registers synchronously or asynchronously depending on configuration. |
| 32 | OE1/I | First output enable input - allows external control of output drivers for bus arbitration or tri-state control. |
| 31 | GCLK1/I | Primary global clock input - default clock source for register-based logic unless overridden by product-term clock. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable slew rate per output | Reduces EMI and crosstalk by allowing slow switching on non-critical outputs while preserving speed on timing-sensitive paths. |
| Pin-keeper circuit on all I/Os | Eliminates need for external pull-ups on unused inputs, reducing BOM cost and board space while preventing floating-induced shoot-through current. |
| Three independent global clock inputs | Enables multi-domain clocking - e.g., one clock for control logic, one for data path, one for status reporting - without internal routing congestion. |
| Security fuse + 16-bit User Signature | Protects intellectual property against unauthorized readback; User Signature stores revision/date/project ID accessible even when fuse is blown. |
| Automatic µA standby mode ("L" version) | Enters ultra-low-power state during logic inactivity - critical for always-on industrial sensors or watchdog controllers with intermittent activity. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Translation |
|---|---|
|
Use Scenario: Replacing discrete TTL logic in programmable logic controller backplanes to add configurable digital I/O channels. IC Role / Device Role / Timing Role: Glue logic CPLD implementing address decoding, strobe generation, and bidirectional data bus control with deterministic 7.5 ns propagation. Use Value: Reduces component count by >80% vs. discrete SSI/MSI, while supporting field-upgradable firmware via JTAG ISP. |
Use Scenario: Bridging ISA or VME bus peripherals to modern microcontroller interfaces in retrofitted instrumentation systems. IC Role / Device Role / Timing Role: Protocol translator managing handshaking, wait-state insertion, and voltage-level adaptation between 5V legacy buses and 3.3V SoCs. Use Value: Enables reuse of certified hardware without redesign; PCI compliance ensures safe integration into expansion slots requiring strict drive strength. |
| PCI Slot Glue Logic | Power-Up Reset Controller |
|
Use Scenario: Implementing address/data multiplexing, parity generation, and interrupt arbitration in PCI add-in cards for industrial PCs. IC Role / Device Role / Timing Role: High-drive, low-skew logic block meeting PCI electrical specs - including 3.3V signaling, 66 MHz timing margins, and hot-plug readiness. Use Value: Eliminates need for external buffer arrays; programmable output slew prevents signal integrity issues on shared bus traces. |
Use Scenario: Ensuring deterministic initialization of FPGA configuration state machines and microcontroller peripherals after cold power-on. IC Role / Device Role / Timing Role: Hardware reset sequencer generating synchronized, hysteresis-controlled reset pulses with guaranteed setup/hold timing to downstream logic. Use Value: Prevents metastability in boot sequences; large-hysteresis option reduces ICC by hundreds of µA while maintaining robustness to noisy VCC ramps. |
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-macrocell Xilinx CoolRunner-II; 10 ns tPD; 3.3V-only; no 5V I/O tolerance. | Lacks PCI compliance and 5V I/O support; requires level-shifting in mixed-voltage systems. | Choose for lower static power (µA range) and newer toolchain support; avoid if 5V interfacing or PCI bus attachment is required. |
| ISPLSI2064VE-100LT44 | Lattice ispLSI 2064VE; 64 macrocells; 100 MHz max; 3.3V core/5V-tolerant I/O; different pinout and JTAG BSDL. | Higher maximum frequency but larger package footprint (44-pin PLCC vs. TQFP); no automatic µA standby mode. | Prefer for higher clock-rate designs where layout space permits PLCC; verify JTAG chain compatibility before migration. |
Compared with XCR3064XL-10VQ44C and ISPLSI2064VE-100LT44, the ATF1504ASL-25AU44 uniquely combines 5V/3.3V I/O flexibility, PCI compliance, automatic µA standby, and identical 44-pin TQFP footprint - making it irreplaceable in legacy industrial upgrades requiring drop-in compatibility and mixed-voltage resilience.
Availability
ATF1504ASL-25AU44 is available at Aetrix Electronics and suitable for industrial PLC upgrades, PCI add-in card manufacturing, and legacy bus interface translation requiring stable component supply over extended production lifecycles.
Supply support for ATF1504ASL-25AU44 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 legacy Atmel PLD products, including design tools, documentation, and long-term supply assurance.
The ATF1504AS(L) family was engineered for high-reliability industrial logic consolidation - targeting applications needing in-system programmability, mixed-voltage I/O, and deterministic timing in harsh environments.
FAQ
What is the operating temperature range for the ATF1504ASL-25AU44?
The ATF1504ASL-25AU44 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the DC Operating Conditions table of the official datasheet (Rev. 0950N–PLD–07/02), and applies specifically to the "L" suffix variant, which denotes the industrial-grade version of the ATF1504ASL-25AU44.
Does the ATF1504ASL-25AU44 support both 3.3V and 5.0V I/O operation?
Yes, the ATF1504ASL-25AU44 supports dual I/O voltage operation: 3.0–3.6 V or 4.75–5.25 V, as specified in the DC Characteristics table. This allows direct interfacing with both 3.3V microcontrollers and legacy 5V TTL/CMOS systems without level shifters - a key feature confirmed for the ATF1504ASL-25AU44 in its official datasheet.
What does the "-25" speed grade indicate for the ATF1504ASL-25AU44?
The "-25" suffix denotes the –25 speed grade, meaning the ATF1504ASL-25AU44 guarantees a maximum pin-to-pin propagation delay (tPD1) of 7.5 ns under specified conditions. This value is explicitly listed in the AC Characteristics table for the –25 column and defines the device's timing performance ceiling for combinational logic paths.
Can the JTAG pins on the ATF1504ASL-25AU44 be used as general-purpose I/Os?
Yes - the JTAG pins (TDI, TMS, TDO, TCK) on the ATF1504ASL-25AU44 can be reconfigured as user I/Os if JTAG boundary-scan or ISP functionality is disabled in the design file. This capability is documented in the "JTAG-BST/ISP Overview" section and confirmed as a programmable option for the ATF1504ASL-25AU44.
Is the ATF1504ASL-25AU44 PCI-compliant, and what does that mean for system design?
Yes, the ATF1504ASL-25AU44 meets PCI electrical specifications, including drive strength, skew, and voltage thresholds. This means it can directly drive PCI bus signals without external buffers - verified in the "PCI Compliance" section of the datasheet - simplifying board layout and ensuring interoperability in PCI-based industrial controllers.
ATF1504ASL-25AU44 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:
- 25 ns
- Voltage Supply - Internal:
- 4.5V ~ 5.5V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 64
- Number of Gates:
- -
- Number of I/O:
- 32
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-TQFP (10x10)
ATF1504ASL-25AU44 FAQ
1.How can I place an order for ATF1504ASL-25AU44 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1504ASL-25AU44 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-25AU44 reliable?
The price and inventory of ATF1504ASL-25AU44 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1504ASL-25AU44 is usually 5 days.
3.What payment methods are accepted for ATF1504ASL-25AU44?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1504ASL-25AU44 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1504ASL-25AU44?
ATF1504ASL-25AU44 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1504ASL-25AU44 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-25AU44?
For technical support, including ATF1504ASL-25AU44 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1504ASL-25AU44 requirements.
6.How does Aetrix verify that ATF1504ASL-25AU44 is sourced from the original manufacturer or authorized distributors?
All ATF1504ASL-25AU44 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-25AU44 meets industry standards.
7.What is the process for return or replacement of ATF1504ASL-25AU44?
All ATF1504ASL-25AU44 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1504ASL-25AU44, 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-25AU44 part is unused and in its original packaging.
Return procedure for ATF1504ASL-25AU44:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1504ASL-25AU44 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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