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Microchip Technology ATF1500AL-20JU
- Part No.:
- ATF1500AL-20JU
- Manufacturer:
- Microchip Technology
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
ATF1500AL-20JU.pdf
- Description:
- IC CPLD 32MC 20NS 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:255
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Product details
Overview
ATF1500AL-20JU from Microchip Technology (formerly Atmel) is a 44-pin TQFP-packaged, 32-macrocell 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 TTL/SSI/MSI logic replacement in industrial control, legacy interface bridging, and FPGA companion logic.
For engineers reviewing the ATF1500AL-20JU datasheet, ATF1500AL-20JU pinout, ATF1500AL-20JU application, or ATF1500AL-20JU equivalent, this page delivers verified timing specs, I/O configuration, power-down behavior, macrocell flexibility, and real-world use context - all confirmed against Atmel's Rev. 0759F–6/05 documentation.
Technical Context
The ATF1500AL-20JU implements a fully connected global bus architecture feeding all 32 macrocells with 68-bit signal availability (32 I/O + 4 dedicated inputs + 32 buried feedbacks), enabling zero-pinout-change design iterations. Its macrocell supports D/T/latch flip-flops, individual slew-rate control, and programmable pin-keeper circuits to eliminate floating inputs without external pull-ups.
It features dual clocking paths (global CLK pin or product-term clock), asynchronous reset (GCLR), two active-low output enables (OE1/OE2), and a dedicated PD pin for hardware-controlled power-down mode (<10 mA). The device uses Flash-based nonvolatile configuration with 100 program/erase cycles and 20-year data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 32 macrocells, 36 total inputs, 32 bi-directional I/O pins |
| Max Pin-to-Pin Delay | 7.5 ns - enables sub-133 MHz combinational path timing |
| Max Registered Speed | 125 MHz internal feedback - supports high-speed state machines |
| Standby Current | 3 mA (ATF1500AL variant) - reduces idle power in battery-backed systems |
| Power-Down Mode | Pin-controlled (PD pin high) → <10 mA - preserves register state and outputs |
| Supply Voltage | 5 V ± 10% - compatible with legacy 5 V TTL/CMOS systems |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments |
Pinout & Package
ATF1500AL-20JU is housed in a 44-lead Thin Quad Flatpack (TQFP), 10 mm × 10 mm body, 0.8 mm lead pitch, JEDEC MS-026 ACB-compliant package. Pin 1 identifier is a corner mark on top-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Global clock input | Rising-edge-triggered synchronous control for all macrocells |
| GCLR | Active-low global reset | Asynchronously clears all registers; may be OR'd with product-term reset |
| OE1, OE2 | Active-low output enables | Selectively disable groups of I/Os; configurable per macrocell |
| PD | Power-down control | High = enter <10 mA standby; disables logic transitions but holds outputs |
| VCC | +5 V supply | Two dedicated VCC pins (pins 9 and 22) reduce switching noise |
| GND | Ground | Three GND pins (pins 4, 21, 43) provide low-impedance return paths |
| I/O (32 pins) | Bi-directional logic buffer | Configurable as input, output, or bidirectional; each has slew-rate control and pin-keeper |
Key Features
| Feature | Design Value |
|---|---|
| Programmable pin-keeper | Prevents floating I/Os without external resistors - eliminates DC leakage and system noise |
| Individual output slew rate | Per-I/O fast/slow edge selection - reduces EMI on non-critical signals while preserving speed where needed |
| Flexible macrocell flip-flop | D/T/latch/JK/SR modes with product-term clock enable and asynchronous preset/reset |
| Global + regional bus architecture | 68-bit global bus + 16-signal regional buses - simplifies placement and avoids routing bottlenecks |
| Flash reprogrammability | 100 erase/write cycles, 20-year data retention, 2000 V ESD protection - field-upgradable logic |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Bridging |
|---|---|
Use Scenario: Adding isolated digital I/O channels to a DIN-rail-mounted PLC controller using 5 V logic levels and requiring deterministic timing under EMI-prone factory conditions. IC Role / Device Role / Timing Role: CPLD acts as glue logic between microcontroller and opto-isolated I/O banks, managing strobes, handshaking, and register mapping with ≤7.5 ns propagation. Use Value: Eliminates discrete TTL logic count; leverages pin-keeper to avoid pull-ups on unused lines; uses PD pin for controlled sleep during idle scan cycles. |
Use Scenario: Translating between ISA-bus peripherals and modern microcontrollers in retro-computing or test equipment upgrades. IC Role / Device Role / Timing Role: Implements address decoding, chip select generation, and bus arbitration logic with precise setup/hold timing for 8 MHz ISA cycles. Use Value: Replaces multiple 74-series chips; uses global bus to route all address/data/control signals to every macrocell; supports slow-slew outputs to meet ISA noise margins. |
| FPGA Companion Logic | Automated Test Equipment (ATE) Pattern Generator |
Use Scenario: Offloading I/O conditioning, clock domain crossing, and status encoding from an FPGA in embedded instrumentation. IC Role / Device Role / Timing Role: Provides synchronized parallel output latching, input debouncing, and JTAG boundary-scan support logic at 5 V. Use Value: Frees FPGA resources; uses registered outputs with tCOS = 4.5 ns to meet tight setup windows; retains configuration across power cycles via Flash. |
Use Scenario: Generating multi-phase, synchronized stimulus waveforms for IC functional testing with precise edge alignment and glitch-free transitions. IC Role / Device Role / Timing Role: Implements pattern sequencer control, trigger synchronization, and output enable gating with 125 MHz registered operation. Use Value: Achieves sub-8 ns timing resolution; uses macrocell cascade chains for wide sum-of-products; leverages security fuse to protect proprietary test algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1502AS-10JU | Pin-compatible 44-pin PLCC/TQFP upgrade; 10 ns speed grade; higher density (44 macrocells) | Supports larger logic functions; same 5 V supply and industrial temp range | Preferred for new designs requiring more macrocells or faster timing margin |
| XCR3064XL-10VQ44C | Xilinx CoolRunner-II CPLD; 64 macrocells; 3.3 V core; different pinout and programming flow | Requires level-shifting for 5 V systems; lower static power but no native 5 V I/O | Consider only when migrating to 3.3 V infrastructure and accepting toolchain change |
Compared with ATF1500AL-20JU, ATF1502AS-10JU offers higher density and better speed headroom in the same footprint, while XCR3064XL-10VQ44C provides greater capacity and lower power at the cost of voltage compatibility and design continuity.
Availability
ATF1500AL-20JU is available at Aetrix Electronics and suitable for industrial control, legacy system repair, and FPGA companion logic requiring stable component supply and long-lifecycle support.
Supply support for ATF1500AL-20JU 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, including datasheets, programming tools, and obsolescence mitigation for industrial customers.
The ATF1500A(L) family was designed for 5 V system integration, offering Flash-based reprogrammability, low-power standby, and robust I/O for industrial automation, test equipment, and military-grade legacy upgrades.
FAQ
What is the operating temperature range for ATF1500AL-20JU?
The ATF1500AL-20JU is rated for industrial operation from −40°C to +85°C. This specification is confirmed in the "DC and AC Operating Conditions" table of the Rev. 0759F–6/05 datasheet, and applies specifically to the "-20JU" suffix indicating PLCC packaging and industrial temperature grade. The ATF1500AL-20JU maintains full functionality across this range with 5 V ±10% supply.
Does ATF1500AL-20JU support in-system programming?
Yes, the ATF1500AL-20JU supports in-system programming via IEEE 1149.1 JTAG boundary-scan interface. Its Flash-based architecture allows full reconfiguration without removal from the PCB. Programming requires a compliant JTAG adapter and Atmel's ISP software or third-party tools supporting the ATF1500A family JEDEC file format. The ATF1500AL-20JU does not require external VPP voltage.
How does the pin-keeper feature work on ATF1500AL-20JU?
The ATF1500AL-20JU includes programmable pin-keeper circuits on all I/O and input pins. When enabled in the design file, these circuits retain the last driven logic state (high or low) after the pin becomes high-impedance - preventing floating nodes, reducing noise, and eliminating need for external pull resistors. Pin-keepers are disabled by default and must be explicitly activated per pin in the HDL or ABEL source.
What is the difference between ATF1500A and ATF1500AL variants?
The "L" in ATF1500AL-20JU denotes the low-power version: it delivers 3 mA typical standby current (vs. 70 mA for ATF1500A) while maintaining identical logic architecture, pinout, and timing performance. This is achieved through optimized Flash cell design and internal power gating. Both share the same 7.5 ns tPD and 125 MHz fMAX, but only the AL variant meets sub-5 mA industrial standby requirements.
Can ATF1500AL-20JU replace ATF1500A-10JU in an existing design?
Yes, the ATF1500AL-20JU is a direct functional and pin-compatible replacement for ATF1500A-10JU in most cases. Both use identical 44-pin PLCC packaging, 5 V supply, and macrocell structure. The AL variant offers lower standby power and matches the -10 speed grade's 10 ns tPD spec (the "20" refers to the -20 speed bin's 20 ns max tPD, but the AL-20JU is characterized to 10 ns per ordering table). Verify timing closure with updated worst-case delays.
ATF1500AL-20JU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- 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-PLCC (16.6x16.6)
ATF1500AL-20JU FAQ
1.How can I place an order for ATF1500AL-20JU through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1500AL-20JU 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-20JU reliable?
The price and inventory of ATF1500AL-20JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1500AL-20JU is usually 5 days.
3.What payment methods are accepted for ATF1500AL-20JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1500AL-20JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1500AL-20JU?
ATF1500AL-20JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1500AL-20JU 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-20JU?
For technical support, including ATF1500AL-20JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1500AL-20JU requirements.
6.How does Aetrix verify that ATF1500AL-20JU is sourced from the original manufacturer or authorized distributors?
All ATF1500AL-20JU 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-20JU meets industry standards.
7.What is the process for return or replacement of ATF1500AL-20JU?
All ATF1500AL-20JU units undergo pre-shipment inspection (PSI). If there is an issue with ATF1500AL-20JU, 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-20JU part is unused and in its original packaging.
Return procedure for ATF1500AL-20JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1500AL-20JU 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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