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Microchip Technology ATF1508ASL-20AC100
- Part No.:
- ATF1508ASL-20AC100
- Manufacturer:
- Microchip Technology
- Package:
- 100-TQFP
- Datasheet:
-
ATF1508ASL-20AC100.pdf
- Description:
- IC CPLD 128MC 20NS 100TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ATF1508ASL-20AC100 from Microchip Technology (formerly Atmel) is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 128 macrocells, 7.5 ns pin-to-pin delay, and support for 125 MHz registered operation. It features three global clock inputs, JTAG IEEE 1149.1 boundary-scan, and in-system programmability via TDI/TDO/TMS/TCK pins. Used in legacy PCI-compliant industrial control logic and FPGA companion glue logic.
For engineers reviewing the ATF1508ASL-20AC100 datasheet, ATF1508ASL-20AC100 pinout, ATF1508ASL-20AC100 application, or ATF1508ASL-20AC100 equivalent, key selection criteria include its 100-lead TQFP package, 5 V VCCINT / 3.3 V or 5 V VCCIO dual-supply architecture, automatic 10 µA standby current in "L" version, PCI-compliant I/O drive strength, and programmable pin-keeper functionality for floating-input mitigation.
Technical Context
The ATF1508ASL-20AC100 implements a hierarchical PLD architecture with 128 macrocells organized into logic blocks, each fed by a 40-signal global bus and regional foldback bus. Its macrocell supports D/T/latch flip-flops, XOR-based arithmetic, buried registered feedback within combinatorial outputs, and product-term-selectable clock enables.
It integrates IEEE 1149.1 JTAG BST with dedicated TAP controller, supports both boundary-scan testing and ISP programming using SVF files, and includes PCI-compliant output drivers with ±44 mA AC high-current sourcing/sinking at 2.2–2.4 V test points. Power management includes pin-controlled power-down (PD1/PD2), per-macrocell reduced-power mode, and VCC power-up reset with selectable hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Macrocell Count | 128 macrocells - provides gate-equivalent logic density sufficient to replace multiple 74-series TTL/MSI devices or classic PLDs in control-plane logic. |
| Pin-to-pin Delay | 7.5 ns - enables reliable timing closure in synchronous logic paths up to 125 MHz registered operation. |
| Global Clock Pins | Three dedicated GCLK1/GCLK2/GCLK3 inputs - allows independent clock domains for state machines, counters, and data synchronization. |
| VCCINT / VCCIO | 5.0 V VCCINT + 3.3 V or 5.0 V VCCIO - decouples core logic voltage from I/O voltage, enabling mixed-voltage system interfacing. |
| Standby Current | 10 µA (L-version) - achieves ultra-low static power during idle periods without external enable circuitry. |
| JTAG Compliance | IEEE Std. 1149.1-1990 & 1149.1a-1993 - enables standardized boundary-scan test access and in-system programming without custom tooling. |
| PCI Compliance | Meets PCI DC/AC drive requirements - supports direct connection to PCI bus signals without level-shifting or external buffers. |
Pinout & Package
ATF1508ASL-20AC100 is packaged in a 100-lead Thin Quad Flat Package (TQFP) with 0.5 mm pitch, body size 14 × 14 mm, and exposed pad (non-thermal). Pin functions are defined per the official Atmel/Microchip pinout diagram for the 100-lead TQFP variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| I/O/PD1 | Programmable power-down input | Asserting high enables 1 mA power-down mode; disables logic transitions while latching internal states and outputs. |
| I/O/TDI | JTAG Test Data Input | Serial input for boundary-scan instruction/data; required for ISP programming and BSDL-based test vector loading. |
| I/O/TMS | JTAG Test Mode Select | Controls TAP controller state machine; pull-up option available to ensure default test mode on power-up. |
| I/O/TDO | JTAG Test Data Output | Serial output for boundary-scan register readback; supports daisy-chained JTAG configurations. |
| I/O/TCK | JTAG Test Clock | Asynchronous clock for JTAG operations; tolerant of slow edges and variable frequency during programming. |
| INPUT/GCLR | Global asynchronous clear | Active-low reset signal routed to all macrocell flip-flops; may be OR'd with product-term assertion for conditional reset. |
| INPUT/OE1 | Global output enable 1 | Controls tri-state behavior across selected I/Os; polarity configurable per macrocell via fitter software. |
| I/O/GCLK3 | Third global clock input | Provides third independent clock domain; supports ITD (input transition detection) for edge-triggered wake-up events. |
| VCCINT | Core logic supply | Must be connected to 5.0 V ±5%; powers input buffers and macrocell logic; compatible with 3.3 V or 5 V input signals. |
| VCCIO | I/O driver supply | Configurable for 3.3 V (2.7–3.6 V) or 5.0 V (4.75–5.25 V); sets output voltage swing and drive strength. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable pin-keeper | Maintains last-driven logic state on unused inputs/I/Os, eliminating need for external pull-ups and reducing system noise and leakage current. |
| Buried registered feedback | Enables second latch per macrocell by routing registered output back into logic array - increases functional density without consuming extra macrocells. |
| Per-macrocell reduced-power bit | Disables unused logic paths within individual macrocells, lowering dynamic current consumption proportionally to utilization. |
| Input transition detection (ITD) | Generates asynchronous pulses on signal edges at GCLK, INPUT, or I/O pins - enables low-power wake-on-event operation without CPU polling. |
| PCI-compliant I/O drivers | Delivers ±44 mA sourcing/sinking at 2.2–2.4 V test points and meets PCI DC specs - allows direct interface to PCI bus without external transceivers. |
Applications
| Industrial Motion Controller | Legacy PCI Add-in Card |
|---|---|
Use Scenario: Real-time sequencing of stepper motor phases and limit switch monitoring in CNC equipment. IC Role / Device Role / Timing Role: Glue logic for microcontroller-to-peripheral handshaking, implementing synchronous state machines with deterministic 7.5 ns propagation. Use Value: Replaces discrete 74HC logic and PALs with single reprogrammable device, reducing BOM count and enabling field-upgradable timing parameters. | Use Scenario: Address decoding, interrupt arbitration, and bus mastering logic on PCI-based data acquisition cards. IC Role / Device Role / Timing Role: PCI-compliant interface logic handling IDSEL, FRAME#, IRDY#, TRDY#, and DEVSEL# signaling with sub-10 ns setup/hold margins. Use Value: Eliminates need for external PCI buffer ICs due to built-in 44 mA drive capability and guaranteed PCI timing compliance. |
| Automated Test Equipment (ATE) | Avionics Signal Conditioning |
Use Scenario: Pattern generation and response capture logic synchronized to high-speed digital I/O channels. IC Role / Device Role / Timing Role: High-speed sequencer controlling parallel test vectors with precise clock-domain crossing between controller and DUT interfaces. Use Value: Achieves 125 MHz registered operation with deterministic timing, enabling tight skew control across 96 I/O pins for multi-site parallel testing. | Use Scenario: ARINC 429 bus interface logic with Manchester encoding/decoding and fault-tolerant status monitoring. IC Role / Device Role / Timing Role: Isolated signal translator between microcontroller UART and differential ARINC physical layer, including parity generation and error flagging. Use Value: Leverages programmable slew rate control to meet EMI limits for avionics, and pin-keeper to hold safe states during power brownouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1508AS-20AC100 | Lacks automatic 10 µA standby; standard standby current is 160 mA (commercial) or 180 mA (industrial). | Suitable where ultra-low quiescent power is not required; otherwise identical logic resources and pinout. | Select ATF1508ASL-20AC100 when battery-backed or energy-constrained operation demands sub-100 µA sleep current. |
| XC95144XL-10TQ100C | Xilinx device with 144 macrocells, 10 ns speed grade, 3.3 V only VCCIO, no PCI compliance, different JTAG BSDL. | Targets modern 3.3 V-only systems; lacks PD1/PD2 power-down pins and ITD circuits. | Choose XC95144XL-10TQ100C only if migrating to Xilinx toolchain and 3.3 V infrastructure; not drop-in compatible. |
Compared with ATF1508AS-20AC100, the ATF1508ASL-20AC100 delivers 16× lower standby current without sacrificing speed or logic density, while the XC95144XL-10TQ100C offers higher macrocell count but requires full redesign due to incompatible voltage, PCI support, and power management architecture.
Availability
ATF1508ASL-20AC100 is available at Aetrix Electronics and suitable for industrial motion controllers, legacy PCI add-in cards, automated test equipment, avionics signal conditioning, and embedded control systems requiring stable component supply across extended product lifecycles.
Supply support for ATF1508ASL-20AC100 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 ATF1508AS(L) CPLD family, including datasheets, BSDL models, and legacy programming tools.
The ATF1508AS(L) product line was designed for high-reliability, reprogrammable glue logic in industrial, telecom, and aerospace applications where long-term availability, JTAG testability, and mixed-voltage I/O interoperability are critical.
FAQ
What is the difference between ATF1508ASL-20AC100 and ATF1508AS-20AC100?
The ATF1508ASL-20AC100 features an automatic 10 µA standby mode ("L" version), whereas the ATF1508AS-20AC100 has standard standby current of 160 mA (commercial) or 180 mA (industrial). Both share identical logic resources, pinout, speed grade (20 ns), and 100-lead TQFP packaging. The "L" suffix denotes enhanced power management without functional trade-offs.
Does ATF1508ASL-20AC100 support in-system programming (ISP)?
Yes, ATF1508ASL-20AC100 supports full IEEE 1149.1 JTAG-based in-system programming via TDI/TDO/TMS/TCK pins. Programming can be performed without removing the device from the PCB using Microchip's ISP software and compatible download cables or ATE systems generating SVF files.
What are the power supply requirements for ATF1508ASL-20AC100?
ATF1508ASL-20AC100 requires two supplies: VCCINT must be 5.0 V ±5% for core logic, and VCCIO may be either 3.3 V (2.7–3.6 V) or 5.0 V (4.75–5.25 V) to set I/O voltage levels and drive strength. Decoupling capacitors are required per Microchip's layout guidelines to ensure stable operation.
Can ATF1508ASL-20AC100 be used in PCI-compliant designs?
Yes, ATF1508ASL-20AC100 meets PCI specification DC and AC drive requirements, including ±44 mA sourcing/sinking at defined test points and VOL/VOH thresholds. Its I/O structure eliminates need for external PCI buffers in add-in card designs operating at 33 MHz.
How does the programmable pin-keeper function work on ATF1508ASL-20AC100?
The pin-keeper feature on ATF1508ASL-20AC100 retains the last-driven logic state on configured inputs or I/Os when left floating, preventing indeterminate voltage levels, system noise, and excess current draw. It is enabled per-pin during design compilation and replaces external pull-up resistors in unconnected or intermittently driven signal paths.
ATF1508ASL-20AC100 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 100-TQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Programmable Type:
- In System Programmable (min 10K program/erase cycles)
- Delay Time tpd(1) Max:
- 20 ns
- Voltage Supply - Internal:
- 4.75V ~ 5.25V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 128
- Number of Gates:
- -
- Number of I/O:
- 80
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
ATF1508ASL-20AC100 FAQ
1.How can I place an order for ATF1508ASL-20AC100 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508ASL-20AC100 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 ATF1508ASL-20AC100 reliable?
The price and inventory of ATF1508ASL-20AC100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508ASL-20AC100 is usually 5 days.
3.What payment methods are accepted for ATF1508ASL-20AC100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508ASL-20AC100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508ASL-20AC100?
ATF1508ASL-20AC100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508ASL-20AC100 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 ATF1508ASL-20AC100?
For technical support, including ATF1508ASL-20AC100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508ASL-20AC100 requirements.
6.How does Aetrix verify that ATF1508ASL-20AC100 is sourced from the original manufacturer or authorized distributors?
All ATF1508ASL-20AC100 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 ATF1508ASL-20AC100 meets industry standards.
7.What is the process for return or replacement of ATF1508ASL-20AC100?
All ATF1508ASL-20AC100 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508ASL-20AC100, 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 ATF1508ASL-20AC100 part is unused and in its original packaging.
Return procedure for ATF1508ASL-20AC100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508ASL-20AC100 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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