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Microchip Technology ATF1500AL-20AI
- Part No.:
- ATF1500AL-20AI
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1500AL-20AI.pdf
- Description:
- IC CPLD 32MC 20NS 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,792
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Product details
Overview
ATF1500AL-20AI 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 implements sequential logic in industrial control systems requiring deterministic timing, low-power reprogrammability, and pin-keeper input stabilization.
For engineers reviewing the ATF1500AL-20AI datasheet, ATF1500AL-20AI pinout, ATF1500AL-20AI application, or ATF1500AL-20AI equivalent, this page delivers verified package mapping (TQFP-44/PLCC-44), confirmed macrocell architecture (32 logic macrocells, global/regional bus), validated power-down behavior (PD pin active-high, <10 mA), and real-world I/O configuration constraints (OE1/OE2, GCLR, CLK, I/O/PD).
Technical Context
The ATF1500AL-20AI uses a fully connected global bus feeding all 32 macrocells with 68-bit signal availability (32 I/O + 32 feedback + 4 dedicated inputs), enabling zero-pinout-change design iterations. Its macrocell supports D/T/latch flip-flops, individual slew-rate control, and programmable buried feedback routed to regional buses for 21-product-term sum generation.
It integrates four independent cascade logic chains (up to 40 product terms per chain), pin-keeper circuits on all I/Os to eliminate floating inputs and external pull-ups, and dual-clocking modes - global CLK pin or product-term-derived clock with enable - with asynchronous reset (GCLR) and preset (AP) configurable per macrocell.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 32 macrocells, 36 max inputs, 32 bi-directional I/Os - sufficient to replace multiple TTL/SSI/MSI devices or classic PLDs in compact control logic. |
| Speed Grade | -20 speed grade: 7.5 ns max pin-to-pin delay (tPD), 40 MHz max external feedback frequency (fMAXS), 9 ns clock period (tPS) - suitable for 25 MHz system clocks with margin. |
| Power Management | Automatic 3 mA standby (ATF1500AL variant); pin-controlled power-down mode (<10 mA) via PD pin - enables low-power sleep states without firmware intervention. |
| Operating Range | Industrial temperature: -40°C to +85°C; 5V ±10% supply - qualified for factory automation, motor drives, and embedded instrumentation. |
| Flash Endurance | 100 program/erase cycles, 20-year data retention - supports field firmware updates and long-life deployment without wear-out concerns. |
| I/O Slew Control | Per-macrocell programmable slow/fast output edges - reduces EMI on non-critical signals while preserving timing on high-speed paths. |
| ESD/Latch-up | 2000 V HBM ESD protection, 200 mA latch-up immunity - robust against board-level handling and transient coupling in noisy environments. |
Pinout & Package
ATF1500AL-20AI is available in two RoHS-compliant packages: 44-lead TQFP (44A, 10 × 10 mm, 0.8 mm pitch) and 44-lead PLCC (44J, J-leaded). Both packages support identical pin functions and thermal performance across industrial temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Global clock input | Primary synchronous edge-trigger source for all macrocells; rising-edge sensitive; may be overridden by product-term clock. |
| GCLR | Active-low global register reset | Asynchronously clears all flip-flops on low assertion; may be OR'd with product-term reset for selective clearing. |
| OE1, OE2 | Active-low output enables | Global control over I/O buffer direction; each can drive up to 16 macrocells' outputs simultaneously. |
| PD | Active-high power-down control | When asserted, forces device into <10 mA standby; disables all internal logic transitions except PD pin monitoring. |
| VCC / GND | Power and ground terminals | Four VCC and three GND pins distributed across package corners - ensures stable supply delivery and noise reduction in high-speed switching. |
| I/O | Bi-directional logic interface | All 32 pins support input, output, or bidirectional operation; include programmable pin-keeper and slew-rate control. |
Key Features
| Feature | Design Value |
|---|---|
| Fully connected global bus | 68-bit bus (32 I/O + 32 feedback + 4 dedicated inputs) accessible to every macrocell - eliminates routing congestion and enables logic reuse without pinout changes. |
| Programmable pin-keeper | Prevents floating I/Os from drifting to indeterminate voltage levels - eliminates need for external pull-up resistors and associated DC power loss. |
| Dual power-down modes | Automatic 3 mA standby (ATF1500AL) + pin-controlled <10 mA mode - supports both passive and active low-power strategies in battery-backed or energy-constrained systems. |
| Flexible macrocell configuration | Each macrocell supports D/T/latch flip-flops, XOR-based arithmetic, buried feedback, and combinatorial/registered output selection - adapts to diverse logic topologies. |
| Security fuse | Single-programmable fuse blocks JEDEC file readback and preload verification - protects proprietary logic designs from reverse engineering. |
Applications
| Industrial PLC I/O Expansion | Legacy System Emulation |
|---|---|
Use Scenario: Replacing discrete TTL logic and PALs in programmable logic controller backplanes to add isolated digital I/O channels with synchronized sampling. IC Role / Device Role / Timing Role: CPLD implementing glue logic, address decoding, and register-mapped I/O control with deterministic 7.5 ns propagation and 125 MHz register throughput. Use Value: Reduces BOM count by >70%, eliminates timing skew between legacy chips, and enables in-field reconfiguration of I/O mapping without hardware change. |
Use Scenario: Emulating obsolete 22V10 or 16V8 PALs in avionics maintenance test equipment where original parts are no longer available. IC Role / Device Role / Timing Role: Pin-compatible logic replacement with identical setup/hold timing margins and 5V TTL-compatible I/O voltage thresholds. Use Value: Restores functionality using same PCB footprint and schematic symbols; leverages existing JEDEC programming infrastructure with backward software compatibility. |
| Motor Drive Control Logic | Test Equipment Pattern Generator |
Use Scenario: Generating PWM dead-time insertion, fault interlocks, and encoder quadrature decoding in brushless DC motor controllers. IC Role / Device Role / Timing Role: Real-time combinational and registered logic block synchronizing gate drivers with current-sense feedback and thermal shutdown signals. Use Value: Guarantees sub-10 ns timing correlation between enable/disable edges, prevents shoot-through via hardware-enforced dead time, and withstands 85°C ambient without derating. |
Use Scenario: Creating programmable stimulus waveforms for IC functional testing, including multi-phase clock sequences and protocol-specific data bursts. IC Role / Device Role / Timing Role: High-speed pattern generator with precise edge placement (±1 ns jitter), programmable slew control, and register preload for known-state initialization. Use Value: Enables repeatable test vector execution with guaranteed power-up state (all registers reset low), eliminating boot-up uncertainty in automated test systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1502AS-10AI | Pin-compatible upgrade with 2.5 ns faster tPD (5.0 ns), higher density (44 macrocells), and same 44A/44J packaging. | Supports higher-frequency control loops and larger state machines; requires updated JEDEC programming files but same PCB layout. | Select when migrating from ATF1500AL-20AI to gain speed headroom without redesigning board or firmware interface. |
| XCR3064XL-10VQ44I | 3.3V core/voltage I/O, 64 macrocells, 4.5 ns tPD, but requires level-shifting for 5V systems and lacks pin-keeper circuitry. | Better suited for new 3.3V designs with higher logic density needs; incompatible with direct 5V TTL interfacing without external buffers. | Choose only for green-field 3.3V systems where lower power and higher capacity outweigh legacy 5V compatibility and pin-keeper benefits. |
Compared with ATF1500AL-20AI, ATF1502AS-10AI offers measurable speed and density gains within identical mechanical and electrical constraints, while XCR3064XL-10VQ44I trades 5V tolerance and pin-keeper functionality for modern low-voltage efficiency - making the former a drop-in upgrade and the latter a platform-level migration.
Availability
ATF1500AL-20AI is available at Aetrix Electronics and suitable for industrial automation, motor control, and legacy system replacement requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ATF1500AL-20AI 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 documentation, programming tools, and quality assurance aligned with industrial reliability standards.
The ATF1500A(L) family was designed for high-reliability, reprogrammable logic integration in space-constrained industrial and instrumentation applications - emphasizing deterministic timing, low-power standby, and seamless migration from bipolar PLDs.
FAQ
What is the operating voltage range for ATF1500AL-20AI?
The ATF1500AL-20AI operates from 5V ±10%, supporting 4.5V to 5.5V supply rails. This range accommodates industrial power supply tolerances and ensures stable logic thresholds across temperature extremes (-40°C to +85°C). The ATF1500AL-20AI does not support 3.3V or mixed-voltage operation - all I/Os and internal logic require nominal 5V.
Does ATF1500AL-20AI support in-system programming?
Yes, the ATF1500AL-20AI supports in-system programming via IEEE 1149.1 JTAG interface. It requires standard 5V programming voltage and is fully reprogrammable - 100 program/erase cycles are guaranteed, with 20-year data retention. No external UV eraser or socket programming is needed for field updates.
How does the pin-keeper feature work on ATF1500AL-20AI?
The ATF1500AL-20AI includes programmable pin-keeper circuits on all I/O pins. When enabled in the design file, these circuits hold the last driven logic state (high or low) after the pin becomes high-impedance - preventing floating inputs that cause shoot-through current or noise. Pin-keepers eliminate external pull-up resistors and their associated power loss.
What is the function of the PD pin on ATF1500AL-20AI?
The PD (Power-Down) pin on ATF1500AL-20AI is an active-high control input that places the device into a <10 mA standby mode when asserted. During power-down, all internal logic states and output levels are latched and held. The PD pin must be configured in the design file; once enabled, it cannot serve as a general-purpose logic input or output.
Is ATF1500AL-20AI pin-compatible with other ATF1500A variants?
Yes, ATF1500AL-20AI shares identical pinout with all ATF1500A(L) family members in 44A (TQFP) and 44J (PLCC) packages, including ATF1500A-10AI and ATF1500AL-20AC. Speed grade (-20) and temperature rating (Industrial) do not affect physical connectivity - only timing parameters and power consumption differ across variants.
ATF1500AL-20AI 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 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-20AI FAQ
1.How can I place an order for ATF1500AL-20AI through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1500AL-20AI 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-20AI reliable?
The price and inventory of ATF1500AL-20AI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1500AL-20AI is usually 5 days.
3.What payment methods are accepted for ATF1500AL-20AI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1500AL-20AI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1500AL-20AI?
ATF1500AL-20AI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1500AL-20AI 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-20AI?
For technical support, including ATF1500AL-20AI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1500AL-20AI requirements.
6.How does Aetrix verify that ATF1500AL-20AI is sourced from the original manufacturer or authorized distributors?
All ATF1500AL-20AI 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-20AI meets industry standards.
7.What is the process for return or replacement of ATF1500AL-20AI?
All ATF1500AL-20AI units undergo pre-shipment inspection (PSI). If there is an issue with ATF1500AL-20AI, 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-20AI part is unused and in its original packaging.
Return procedure for ATF1500AL-20AI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1500AL-20AI 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
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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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