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Microchip Technology ATF1504AS-10AC44
- Part No.:
- ATF1504AS-10AC44
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1504AS-10AC44.pdf
- Description:
- IC CPLD 64MC 10NS 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,380
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Product details
Overview
ATF1504AS-10AC44 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, 125 MHz registered operation, and 44-pin TQFP packaging. It serves as a reprogrammable logic integration solution for legacy TTL/SSI/MSI replacement and control-plane logic in industrial I/O modules.
For engineers reviewing the ATF1504AS-10AC44 datasheet, ATF1504AS-10AC44 pinout, ATF1504AS-10AC44 application, or ATF1504AS-10AC44 equivalent, key selection criteria include JTAG ISP capability, 3.3V/5V I/O flexibility, programmable slew rate, pin-keeper circuits for floating-input immunity, and PCI-compliant drive strength - all confirmed for this specific -10 speed grade and 44-pin TQFP variant.
Technical Context
The ATF1504AS-10AC44 implements a global bus architecture feeding up to 40 signals into each logic block's switch matrix, with buried feedback from all 64 macrocells routed to the global bus. Each macrocell supports D/T/latch flip-flops, individual output enable, and combinatorial outputs with registered feedback - enabling state-machine and glue-logic functions without external latches.
It features three global clock inputs (GCLK1–GCLK3), input transition detection (ITD) on clocks/I/Os, fast registered input paths from product terms, and VCC power-up reset with selectable hysteresis. The device supports IEEE 1149.1/1149.1a boundary-scan testing and in-system programming via standard 4-pin JTAG interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 64 macrocells - sufficient for replacing multiple 74-series ICs or implementing medium-complexity control logic. |
| Speed Grade | -10 = 7.5 ns max pin-to-pin delay - enables reliable operation at 100 MHz system clock with timing margin. |
| Max Registered Frequency | 125 MHz - supports high-speed synchronous logic such as data path controllers or protocol state machines. |
| I/O Voltage Support | 3.3V or 5.0V - allows direct interfacing with mixed-voltage systems without level shifters. |
| Power Management | Pin-controlled 1 mA standby mode + automatic µA standby (L-version only); this part is non-L, so 1 mA standby applies. |
| JTAG Compliance | IEEE Std. 1149.1-1990 and 1149.1a-1993 - enables boundary-scan testability and standardized ISP across production and field updates. |
| PCI Compliance | Meets PCI electrical specifications - supports direct connection to PCI bus without external drivers. |
Pinout & Package
ATF1504AS-10AC44 is packaged in a 44-lead Thin Quad Flat Package (TQFP) with 0.8 mm lead pitch, RoHS-compliant, and rated for commercial temperature range (0°C to +70°C). Pin 1 is located at top-left corner when marking side faces up and notch/pin-1 indicator is oriented left.
| Pin | 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 | I/O/TDI/TMS/TDO/TCK/GCLKx/GCLR/OE1/OE2/PD1/PD2 | Bi-directional I/O pins with dual-function capability: JTAG control (TDI/TMS/TDO/TCK), global clocks (GCLK1–GCLK3), global clear (GCLR), output enables (OE1/OE2), and power-down controls (PD1/PD2). |
| 27, 36, 44 | GND | Ground reference pins - must be connected to system ground plane for noise immunity and stable logic thresholds. |
| 10, 16, 24, 32 | VCC | Core and I/O supply pins - require local 0.1 µF ceramic decoupling per VCC pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| In-System Programmability (ISP) | Enables firmware updates and design iterations without device removal - critical for field-deployed industrial controllers. |
| Programmable Slew Rate | Reduces EMI by slowing edge rates on non-critical outputs - eliminates need for external series resistors in noise-sensitive environments. |
| Pin-keeper Circuits | Prevents floating inputs/I/Os from drifting to indeterminate voltage - removes requirement for external pull-ups and cuts static current in unused pins. |
| Security Fuse | Blocks unauthorized readback of configuration bitstream - protects proprietary logic design from cloning or reverse engineering. |
| User Signature Register | 16-bit user-accessible memory for storing revision ID, project name, or calibration data - persists regardless of security fuse state. |
Applications
| Industrial PLC I/O Expansion | Legacy System Glue Logic Replacement |
|---|---|
|
Use Scenario: Adding isolated digital input/output channels to a programmable logic controller chassis using discrete optocouplers and drivers. IC Role / Device Role / Timing Role: Configurable logic array implementing input debouncing, output pulse stretching, and status encoding - synchronized to 10–20 MHz internal clock. Use Value: Replaces 8–12 discrete 74HC-series chips with single ATF1504AS-10AC44, reducing board area by >65% and eliminating interconnect skew. |
Use Scenario: Modernizing aging test equipment that used obsolete PAL/GAL devices for address decoding and bus arbitration. IC Role / Device Role / Timing Role: Pin-locked CPLD replacement preserving original PCB layout while adding JTAG ISP for future firmware updates. Use Value: Enables drop-in upgrade path with identical 44-pin TQFP footprint, same timing margins, and no redesign cost. |
| PCI Bus Interface Logic | Automated Test Equipment (ATE) Control Sequencer |
|
Use Scenario: Implementing PCI target interface logic including command decode, burst-length tracking, and parity generation in embedded instrumentation. IC Role / Device Role / Timing Role: PCI-compliant logic engine handling setup/hold timing, address/data steering, and error signaling - operating at 33 MHz PCI clock. Use Value: Meets PCI electrical specs (drive strength, skew, noise) without external buffers - simplifies compliance validation and reduces BOM count. |
Use Scenario: Generating precise stimulus patterns and response sampling windows for semiconductor wafer probing systems. IC Role / Device Role / Timing Role: High-reliability sequencer managing multi-phase test cycles with sub-10 ns timing resolution and deterministic reset recovery. Use Value: Leverages 7.5 ns pin-to-pin delay and power-up reset hysteresis option to guarantee known initial state after cold start - eliminates test aborts due to metastability. |
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 macrocells, 10 ns speed, CoolRunner-II architecture, 3.3V-only I/O, no 5V tolerance. | Requires level-shifting in 5V systems; lacks PCI compliance and pin-keeper circuits. | Preferred where low static power (<10 µA standby) and 3.3V-only operation are mandatory. |
| EPM3064ATC44-10N | 64 macrocells, 10 ns speed, MAX 3000A architecture, 5V-tolerant I/O, but no JTAG ISP - requires UV erasure or dedicated programmer. | Not suitable for field updates; lacks power-down mode and programmable slew rate. | Applicable only in cost-sensitive, fixed-function designs with no post-deployment reprogramming needs. |
Compared with XCR3064XL-10VQ44C and EPM3064ATC44-10N, the ATF1504AS-10AC44 uniquely supports 3.3V/5V mixed I/O, JTAG ISP, PCI compliance, and pin-keeper circuits - making it the only choice for industrial upgrades requiring field-programmability, legacy voltage compatibility, and noise-immune floating-pin handling.
Availability
ATF1504AS-10AC44 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy system glue logic replacement, and PCI bus interface logic requiring stable component supply and long-term lifecycle support.
Supply support for ATF1504AS-10AC44 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 application notes.
The ATF1504AS product line was designed for high-reliability, pin-compatible replacement of obsolete PAL/GAL devices and integration of control-plane logic in industrial, test, and communications equipment.
FAQ
What is the maximum operating frequency of the ATF1504AS-10AC44?
The ATF1504AS-10AC44 supports registered operation up to 125 MHz and has a maximum internal global clock frequency of 125 MHz at the -10 speed grade. Its 7.5 ns pin-to-pin delay enables reliable timing closure in systems with 10 ns or longer clock periods. The actual achievable frequency depends on logic depth and routing - the ATF1504AS-10AC44 datasheet specifies fCNT = 125 MHz under standard conditions.
Does the ATF1504AS-10AC44 support both 3.3V and 5V I/O interfaces?
Yes, the ATF1504AS-10AC44 supports configurable 3.3V or 5.0V I/O operation. VCCIO pins accept either 3.0–3.6V or 4.75–5.25V, allowing direct interfacing with mixed-voltage systems. This dual-voltage capability is confirmed for the ATF1504AS-10AC44 variant and eliminates the need for external level translators in legacy-to-modern interface designs.
How does the pin-keeper feature work on the ATF1504AS-10AC44?
The ATF1504AS-10AC44 includes programmable pin-keeper circuits on all inputs and I/Os. When enabled, these circuits hold the last driven logic state (high or low) if the pin becomes floating - preventing intermediate voltages that cause shoot-through current and EMI. This feature replaces external pull-up/down resistors and is configured during JEDEC file generation for the ATF1504AS-10AC44.
Is JTAG In-System Programming (ISP) supported on the ATF1504AS-10AC44?
Yes, the ATF1504AS-10AC44 fully supports JTAG ISP via the standard 4-pin interface (TDI, TMS, TCK, TDO) compliant with IEEE 1149.1-1990 and 1149.1a-1993. Programming can be performed in-circuit without removing the device, and the JTAG port remains functional even after security fuse programming - enabling field updates and diagnostics for the ATF1504AS-10AC44 throughout its service life.
What package type and temperature range does the ATF1504AS-10AC44 use?
The ATF1504AS-10AC44 uses a 44-lead TQFP package with 0.8 mm lead pitch and is rated for the commercial temperature range (0°C to +70°C). This matches the "C" suffix in the part number and is validated in the official Atmel/Microchip datasheet Rev. 0950N–PLD–07/02 for the ATF1504AS-10AC44 variant specifically.
ATF1504AS-10AC44 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 44-TQFP
- Packaging:
- Tray
- 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:
- 4.75V ~ 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-10AC44 FAQ
1.How can I place an order for ATF1504AS-10AC44 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1504AS-10AC44 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-10AC44 reliable?
The price and inventory of ATF1504AS-10AC44 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1504AS-10AC44 is usually 5 days.
3.What payment methods are accepted for ATF1504AS-10AC44?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1504AS-10AC44 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1504AS-10AC44?
ATF1504AS-10AC44 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1504AS-10AC44 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-10AC44?
For technical support, including ATF1504AS-10AC44 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1504AS-10AC44 requirements.
6.How does Aetrix verify that ATF1504AS-10AC44 is sourced from the original manufacturer or authorized distributors?
All ATF1504AS-10AC44 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-10AC44 meets industry standards.
7.What is the process for return or replacement of ATF1504AS-10AC44?
All ATF1504AS-10AC44 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1504AS-10AC44, 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-10AC44 part is unused and in its original packaging.
Return procedure for ATF1504AS-10AC44:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1504AS-10AC44 Tags
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5M40ZE64C5N
Intel
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ATF1502ASV-15AU44
Microchip Technology
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Intel
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5M80ZT100C5N
Intel
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ATF1502AS-10AU44
Microchip Technology
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ATF1502AS-10JU44
Microchip Technology
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5M80ZE64I5N
Intel
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5M80ZT100I5N
Intel
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LC4032V-75TN48C
Lattice Semiconductor Corporation
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ATF1504ASV-15AU44
Microchip Technology
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ATF1504AS-10JU44
Microchip Technology
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5M160ZE64C5N
Intel
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