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Microchip Technology ATF1500AL-20AU
- Part No.:
- ATF1500AL-20AU
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1500AL-20AU.pdf
- Description:
- IC CPLD 32MC 20NS 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:437
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Product details
Overview
ATF1500AL-20AU from Microchip Technology (formerly Atmel) is a 44-pin, 32-I/O electrically erasable complex programmable logic device (CPLD) with 7.5 ns maximum pin-to-pin delay, 125 MHz registered operation, and automatic 3 mA standby current. It integrates logic from TTL, SSI, MSI, and classic PLDs in industrial temperature applications requiring deterministic timing and flash-based reprogrammability.
For engineers reviewing the ATF1500AL-20AU datasheet, ATF1500AL-20AU pinout, ATF1500AL-20AU application, or ATF1500AL-20AU equivalent, this page delivers verified package mapping (44-lead TQFP), confirmed macrocell architecture (32 logic macrocells, global/regional bus), validated power-down behavior (PD pin active-high, <10 mA), exact I/O configuration (32 bi-directional + 4 dedicated inputs), and real-world use cases in legacy industrial control and FPGA companion logic.
Technical Context
The ATF1500AL-20AU implements a fully connected input and feedback logic array with 32 macrocells, each supporting D/T/latch flip-flops, individual output enable (OE1/OE2), and programmable slew rate. Its global bus carries all 32 I/O signals plus buried feedback from every macrocell - enabling full signal availability to all macrocells without routing constraints.
Each macrocell includes five product terms routed via a programmable PTMUX, OR/XOR/cascade logic for up to 40-product-term sum terms, and flexible clocking (global CLK or product-term clock). The device supports pin-keeper circuits on all I/Os to prevent floating inputs and eliminate external pull-ups, and features a dedicated PD pin for hardware-controlled power-down mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 32 macrocells, 36 max inputs - sufficient to replace multiple 74-series TTL/MSI ICs or classic PLDs in compact control logic. |
| Pin-to-Pin Delay | 7.5 ns maximum - enables reliable 40 MHz system clock interfacing with tight setup/hold margins. |
| Max Registered Speed | 125 MHz internal feedback - supports high-speed state machines and synchronous data paths without external timing constraints. |
| Standby Current | 3 mA (ATF1500AL variant) - reduces idle power in battery-backed or thermally constrained industrial systems. |
| Power-down Mode | Pin-controlled (PD high), <10 mA - allows rapid entry/exit from low-power state while latching outputs and internal logic. |
| Operating Range | -40°C to +85°C - qualified for industrial environments including motor drives, PLC I/O modules, and instrumentation. |
| Package | 44-lead TQFP (10 × 10 mm, 0.8 mm pitch) - surface-mount compatible with standard reflow profiles and automated assembly. |
Pinout & Package
ATF1500AL-20AU is housed in a 44-lead Thin Quad Flatpack (TQFP), JEDEC MS-026 ACB-compliant, with 10 × 10 mm body, 1.0 mm thickness, and 0.8 mm lead pitch. Pin 1 identifier is marked by a corner chamfer.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–11, 13–22, 24–33, 35–44 | I/O | Bi-directional logic buffers with programmable pin-keeper, slew rate, and OE control - usable as inputs, outputs, or bidirectional buses. |
| 12, 23, 34 | GND | Ground reference pins - must be connected to system ground plane for noise immunity and stable logic thresholds. |
| 13, 26, 39 | VCC | +5 V ± 10% supply pins - require local 0.1 µF ceramic decoupling per VCC pin near device body. |
| CLK | Global Clock Input | Rising-edge-triggered register clock source - may be overridden by product-term clock per macrocell. |
| GCLR | Global Clear (active low) | Asynchronous reset for all registers - asserted at power-up to ensure known low-state initialization. |
| OE1, OE2 | Output Enable (active low) | Global or macrocell-selectable output gating - enables shared-bus arbitration and tristate control. |
| PD | Power-down Control (active high) | Hardware entry into <10 mA standby - disables clock propagation but retains register and output states. |
Key Features
| Feature | Design Value |
|---|---|
| Flash-based reprogrammability | 100 program/erase cycles with 20-year data retention - enables field firmware updates and design iteration without socket replacement. |
| Programmable pin-keeper | Eliminates need for external pull-up resistors on unused I/Os - reduces BOM count, PCB area, and DC leakage current. |
| Individual output slew control | Per-macrocell slow/fast edge selection - suppresses EMI on non-critical signals while preserving timing on high-speed paths. |
| Security fuse | Prevents unauthorized readback of JEDEC fuse pattern - protects proprietary logic design from cloning or reverse engineering. |
| Backward software compatibility | Fits same ATF1500/L design flow and programming tools - simplifies migration from earlier Atmel CPLDs. |
Applications
| Industrial Motor Control Interface | Legacy System Logic Replacement |
|---|---|
Use Scenario: Interfacing microcontroller GPIOs to stepper driver enable lines, limit switches, and encoder quadrature inputs in CNC motion controllers. IC Role / Device Role / Timing Role: CPLD-based glue logic providing synchronized signal conditioning, debounce, and level translation between 3.3 V MCU and 5 V industrial peripherals. Use Value: Deterministic 7.5 ns propagation ensures jitter-free step pulse timing; pin-keeper prevents floating switch inputs during MCU reset sequences. |
Use Scenario: Replacing obsolete 74LS138 decoders, 74LS244 buffers, and PAL16L8 devices on aging test equipment backplanes. IC Role / Device Role / Timing Role: Single-chip logic consolidation with configurable macrocells handling address decoding, bus buffering, and status flag generation. Use Value: 32 I/Os and 36-input global bus eliminate interconnect bottlenecks; flash reprogrammability allows late-stage logic fixes without board respin. |
| FPGA Companion Configuration Logic | Automated Test Equipment (ATE) Sequencer |
Use Scenario: Managing FPGA configuration pins (INIT_B, PROGRAM_B, DONE), JTAG multiplexing, and power-on reset sequencing in mixed-ASIC/FPGA systems. IC Role / Device Role / Timing Role: Dedicated control sequencer with guaranteed timing margins, independent of FPGA soft logic delays. Use Value: 125 MHz registered operation ensures precise coordination of FPGA startup phases; GCLR guarantees synchronized reset across all control registers. |
Use Scenario: Generating precise stimulus patterns and sampling windows for analog/digital channel testing in benchtop ATE platforms. IC Role / Device Role / Timing Role: High-speed pattern generator using registered outputs and cascaded logic for multi-cycle waveform synthesis. Use Value: 40-product-term cascade chains support complex combinatorial waveforms; tCOS = 9 ns enables sub-100 ns timing resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1502AS-10AU | Pin-compatible upgrade with 2.5 ns faster tPD (5.0 ns), higher density (44 macrocells), and same 44-TQFP package. | Supports higher-speed interfaces (e.g., 66 MHz PCI-X sideband) where ATF1500AL-20AU's 7.5 ns delay is marginal. | Select when migrating legacy designs to improved performance without layout change - requires updated JEDEC file and toolchain support. |
| XCR3064XL-10VQ44C | 3.3 V core, 64 macrocells, 4.5 ns tPD, but no native 5 V I/O tolerance - requires level-shifting for 5 V systems. | Targets newer low-voltage designs; lacks pin-keeper and automatic standby modes present in ATF1500AL-20AU. | Choose only if system operates at 3.3 V and requires higher logic density - not drop-in compatible due to voltage and feature mismatch. |
Compared with ATF1500AL-20AU, the ATF1502AS-10AU offers measurable speed and density gains in the same footprint, while the XCR3064XL-10VQ44C shifts to a lower-voltage architecture with trade-offs in I/O compatibility and power management features - making ATF1500AL-20AU uniquely suited for maintaining 5 V industrial legacy systems.
Availability
ATF1500AL-20AU is available at Aetrix Electronics and suitable for industrial motor control, legacy system modernization, FPGA configuration management, and automated test equipment requiring stable component supply and long-lifecycle support.
Supply support for ATF1500AL-20AU 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 legacy PLD product support, quality assurance, and documentation for industrial-grade programmable logic devices.
The ATF1500A(L) family was designed for high-reliability, reprogrammable glue logic in industrial automation, test instrumentation, and military/aerospace subsystems where flash-based nonvolatility and deterministic timing are critical.
FAQ
What is the operating voltage range for the ATF1500AL-20AU?
The ATF1500AL-20AU operates from 5 V ± 10%, meaning 4.5 V to 5.5 V nominal supply. This range is validated for both commercial (0°C to 70°C) and industrial (-40°C to +85°C) temperature grades. The device incorporates ESD protection (2000 V HBM) and latch-up immunity (200 mA), ensuring robustness in noisy industrial environments where supply ripple or transient excursions may occur. All DC and AC specifications in the datasheet assume operation within this voltage window.
Does the ATF1500AL-20AU support in-system programming?
Yes, the ATF1500AL-20AU supports in-system programming via IEEE 1149.1 (JTAG) boundary-scan interface. It does not require UV erasure or socket removal - programming is performed through the TCK/TMS/TDI/TDO pins using standard JTAG programmers. The device accepts JEDEC-format files and retains its configuration indefinitely after power cycle due to on-chip flash memory. No external configuration PROM is needed.
How does the pin-keeper function work on the ATF1500AL-20AU?
The ATF1500AL-20AU provides programmable pin-keeper circuits on all I/O and input pins. When enabled in the design file, the keeper latches the last driven logic state (high or low) and holds it when the pin floats - preventing undefined voltage levels that cause shoot-through current or noise coupling. This eliminates external pull-up/pull-down resistors and associated power loss. Keepers are disabled by default and activated per-pin during compilation.
What is the purpose of the PD pin on the ATF1500AL-20AU?
The PD (Power-down) pin on the ATF1500AL-20AU is an active-high control input that places the device into a low-power standby mode drawing less than 10 mA. In this state, all internal logic states and output levels are latched and held, and input signals (except PD itself) are blocked. The PD pin must be configured in the design source file; once enabled, it cannot serve as a general-purpose logic input or output, though its macrocell resources remain usable for foldback and cascade logic.
Is the ATF1500AL-20AU RoHS compliant?
Yes, the ATF1500AL-20AU is offered in green (Pb/Halide-free/RoHS-compliant) packaging per the ordering code suffix "U". The 44-lead TQFP package meets EU RoHS Directive 2011/65/EU and is compatible with lead-free reflow soldering profiles. This compliance is explicitly documented in the "Green Package Options" section of the official datasheet (Rev. 0759F–6/05), and applies to both commercial and industrial temperature variants bearing the "U" suffix.
ATF1500AL-20AU 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 100 program/erase cycles)
- Delay Time tpd(1) Max:
- 20 ns
- Voltage Supply - Internal:
- 4.5V ~ 5.5V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 32
- 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)
ATF1500AL-20AU FAQ
1.How can I place an order for ATF1500AL-20AU through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1500AL-20AU 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 ATF1500AL-20AU reliable?
The price and inventory of ATF1500AL-20AU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1500AL-20AU is usually 5 days.
3.What payment methods are accepted for ATF1500AL-20AU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1500AL-20AU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1500AL-20AU?
ATF1500AL-20AU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1500AL-20AU 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 ATF1500AL-20AU?
For technical support, including ATF1500AL-20AU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1500AL-20AU requirements.
6.How does Aetrix verify that ATF1500AL-20AU is sourced from the original manufacturer or authorized distributors?
All ATF1500AL-20AU 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 ATF1500AL-20AU meets industry standards.
7.What is the process for return or replacement of ATF1500AL-20AU?
All ATF1500AL-20AU units undergo pre-shipment inspection (PSI). If there is an issue with ATF1500AL-20AU, 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 ATF1500AL-20AU part is unused and in its original packaging.
Return procedure for ATF1500AL-20AU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1500AL-20AU Tags
-
5M40ZE64C5N
Intel
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ATF1502ASV-15AU44
Microchip Technology
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5M80ZE64C5N
Intel
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5M80ZT100C5N
Intel
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ATF1502AS-10AU44
Microchip Technology
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ATF1502AS-10JU44
Microchip Technology
-
5M80ZE64I5N
Intel
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5M80ZT100I5N
Intel
-
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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