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Microchip Technology ATF1508ASL-20JC84
- Part No.:
- ATF1508ASL-20JC84
- Manufacturer:
- Microchip Technology
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
ATF1508ASL-20JC84.pdf
- Description:
- IC CPLD 128MC 20NS 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,075
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Product details
Overview
ATF1508ASL-20JC84 from Microchip Technology (formerly Atmel) is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 128 macrocells, 5 product terms per macrocell expandable to 40, 7.5 ns pin-to-pin delay, and registered operation up to 125 MHz. It operates at 5.0 V VCCINT and supports 3.3 V or 5.0 V I/O, and is used in PCI-compliant interface logic, industrial control state machines, and legacy TTL replacement.
For engineers reviewing the ATF1508ASL-20JC84 datasheet, ATF1508ASL-20JC84 pinout, ATF1508ASL-20JC84 application, or ATF1508ASL-20JC84 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for CPLD-based digital logic integration.
Technical Context
The ATF1508ASL-20JC84 implements a flexible macrocell architecture with D/T/latch-configurable flip-flops, global and individual register control, programmable output slew rate, and open-collector output option. Its routing includes a 40-signal global bus fed by all 128 macrocell feedbacks and I/O pins, plus regional foldback buses enabling up to 40-term cascade logic chains.
It supports IEEE 1149.1/1149.1a JTAG boundary-scan testing and in-system programming (ISP), features automatic 10 µA standby in "L" version, pin-controlled 1 mA power-down mode, and programmable pin-keeper circuits on all inputs/I/Os. Three global clock pins (GCLK1–GCLK3), input transition detection (ITD), and VCC power-up reset with selectable hysteresis are integrated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 128 macrocells - provides sufficient resources for medium-complexity glue logic, protocol translation, or state machine consolidation. |
| Pin-to-pin Delay | 7.5 ns - enables reliable timing closure in 125 MHz registered designs with margin for board-level signal integrity. |
| Max Registered Frequency | 125 MHz - supports high-speed control paths in industrial PLCs, test equipment, and PCI interface logic. |
| VCCINT / VCCIO | 5.0 V / 3.3 V or 5.0 V - allows mixed-voltage system interfacing while maintaining 5 V core compatibility for legacy TTL signal levels. |
| Standby Current (L version) | 10 µA - reduces quiescent power in battery-backed or low-duty-cycle embedded systems without sacrificing reprogrammability. |
| JTAG Compliance | IEEE Std. 1149.1-1990 & 1149.1a-1993 - ensures interoperability with standard boundary-scan test infrastructure and ISP tools. |
| PCI Compliance | Fully compliant with PCI DC/AC drive requirements - eliminates need for external bus transceivers in add-in card designs. |
Pinout & Package
ATF1508ASL-20JC84 is packaged in an 84-lead PLCC (Plastic Leaded Chip Carrier) with 0.05 inch lead pitch, RoHS-compliant, and rated for industrial temperature range (−40°C to +85°C). The package is surface-mount compatible and features internal heat dissipation suitable for dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–10, 12–20, 22–32, 34–40, 42–53, 55–64, 66–74, 76–84 | I/O/PD1 or I/O/PD2 or general-purpose I/O | Bi-directional logic pins; PD1/PD2 serve as dedicated power-down control inputs when enabled in design file - disables internal logic while preserving output states. |
| 11, 21, 33, 41, 54, 65, 75 | GND | Ground reference for VCCINT and VCCIO domains; multiple GND pins reduce ground bounce in high-speed switching. |
| 4, 16, 37, 48, 57, 68, 78 | VCCIO | I/O power supply pins - must be tied to 3.3 V or 5.0 V depending on interface voltage level; decoupling required per pin. |
| 39, 60 | VCCINT | Core logic power supply - must be connected to 5.0 V ±5% (industrial: ±10%); powers input buffers and macrocell logic arrays. |
| 24, 44, 56, 72 | I/O/TDI, I/O/TMS, I/O/TDO, I/O/TCK | JTAG boundary-scan and ISP interface - configurable as general I/O if JTAG is disabled in fuse map. |
| 13, 15, 26, 36, 46, 59, 62, 67, 70, 73 | INPUT/GCLR, INPUT/OE1, INPUT/OE2/GCLK2, INPUT/GCLK1, I/O/GCLK3 | Dedicated global control inputs - support asynchronous clear, output enable, and three independent clock sources with ITD capability. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Pin-keeper | Prevents floating inputs/I/Os without external pull-ups - eliminates DC leakage current and system noise in unconnected or tri-stated configurations. |
| Reduced-power Macrocell Bit | Individually disables unused logic paths per macrocell - cuts dynamic power consumption in partial-utilization designs without affecting timing. |
| Combinatorial Output with Registered Feedback | Enables dual-latch behavior within single macrocell - supports compact implementation of pipelined logic or metastability-hardened synchronizers. |
| Three Global Clock Pins with ITD | Allows independent clock domains and glitch-free edge detection on clocks/inputs - critical for synchronous reset generation and asynchronous event capture. |
| Security Fuse + User Signature | Protects configuration bitstream while allowing 16-bit user-accessible signature - supports traceability, revision control, and secure field updates. |
Applications
| Industrial Control Logic | PCI Interface Adapter |
|---|---|
Use Scenario: Replacing discrete TTL logic in programmable logic controllers for sequence control, interlock monitoring, and I/O expansion. IC Role / Device Role / Timing Role: Configurable glue logic implementing combinatorial decoding, registered state machines, and synchronized I/O handshaking. Use Value: Reduces BOM count and board area vs. discrete SSI/MSI; retains full reprogrammability for firmware-driven logic updates in deployed systems. |
Use Scenario: Implementing address/data steering, bus arbitration, and configuration space access in PCI add-in cards for test instrumentation. IC Role / Device Role / Timing Role: PCI-compliant interface controller managing IDSEL decoding, DEVSEL assertion, and parity generation. Use Value: Meets PCI DC/AC drive specs natively - avoids external transceivers and simplifies layout while supporting hot-plug-compatible reset sequencing. |
| Legacy System Emulation | Power Management Sequencer |
Use Scenario: Emulating obsolete PAL/GAL devices in avionics maintenance spares or medical device service modules. IC Role / Device Role / Timing Role: Pin-compatible functional replacement with identical timing behavior and electrical interface. Use Value: Enables drop-in replacement of EOL parts using same PCB footprint and JEDEC-standard programming flow - no redesign required. |
Use Scenario: Coordinating power-up/down sequencing of multi-rail FPGA, ADC, and memory subsystems in industrial gateways. IC Role / Device Role / Timing Role: State-machine-based sequencer with programmable delays, fault monitoring, and reset distribution. Use Value: Integrates timing-critical sequencing logic into single device with deterministic 7.5 ns propagation - improves reliability over RC-based solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD-based digital logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1508AS-20JC84 | No automatic 10 µA standby; higher ICC1 (160 mA std mode); lacks edge-controlled power-down "L" feature. | Suitable only where ultra-low quiescent current is not required; less ideal for battery-backed or energy-sensitive deployments. | Select when cost sensitivity outweighs standby power needs and existing designs already use non-L variant. |
| XC95144XL-10TQ100C | Xilinx CoolRunner-II architecture; 3.3 V core/I/O; 5 ns tPD; 144 macrocells; different JTAG/BSDL implementation. | Better suited for new 3.3 V-only designs requiring lower static power and higher density; not pin-compatible or fuse-map compatible. | Choose for green-field 3.3 V systems needing longer data retention (>20 years) and lower active power, accepting toolchain and layout changes. |
Compared with ATF1508AS-20JC84, the ATF1508ASL-20JC84 delivers 4 orders-of-magnitude lower standby current and integrated power-down control, while the XC95144XL-10TQ100C offers higher macrocell count and native 3.3 V operation but requires full re-design and tool migration.
Availability
ATF1508ASL-20JC84 is available at Aetrix Electronics and suitable for industrial control logic, PCI interface adapters, and legacy system emulation requiring stable component supply across extended product lifecycles.
Supply support for ATF1508ASL-20JC84 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) family, including datasheets, programming tools, and long-term supply commitments for industrial-grade PLDs.
The ATF1508AS(L) series was designed for high-reliability, reprogrammable digital logic in industrial automation, test equipment, and military/aerospace subsystems where EEPROM-based nonvolatility and JTAG-based field updates are essential.
FAQ
What is the operating temperature range for ATF1508ASL-20JC84?
The ATF1508ASL-20JC84 is rated for industrial temperature range: −40°C to +85°C. This is confirmed in the Absolute Maximum Ratings table and DC Operating Conditions section of the official datasheet (Rev. 0784P–PLD–7/05), making it suitable for deployment in harsh environments such as factory floors and outdoor telecom cabinets.
Does ATF1508ASL-20JC84 support in-system programming (ISP)?
Yes, ATF1508ASL-20JC84 supports full IEEE 1149.1-compliant in-system programming via its four-pin JTAG interface (TCK, TMS, TDI, TDO). Programming can be performed without removing the device from the PCB, and Atmel's ISP software generates SVF files compatible with automated test equipment.
How does the power-down mode work on ATF1508ASL-20JC84?
ATF1508ASL-20JC84 supports pin-controlled power-down using PD1 or PD2 inputs. When enabled in the design file and asserted high, the device draws <10 mA while latching all internal logic and output states. Inputs (except PD pin) are blocked, and pin-keeper circuits maintain I/O levels - ensuring deterministic resume behavior after wake-up.
Can ATF1508ASL-20JC84 operate with both 3.3 V and 5.0 V I/O interfaces?
Yes, ATF1508ASL-20JC84 supports mixed I/O voltage operation: VCCINT must be 5.0 V, while VCCIO pins may be independently set to either 3.3 V or 5.0 V. This allows direct interfacing with both legacy 5 V TTL and modern 3.3 V logic families without level shifters.
Is ATF1508ASL-20JC84 PCI-compliant?
Yes, ATF1508ASL-20JC84 meets all PCI 2.2 DC and AC electrical specifications, including VOL ≤ 0.55 V at 3 mA, VOH ≥ 2.4 V at −2 mA, and specified sink/source current curves. Its native drive strength eliminates need for external PCI buffers in add-in card designs.
ATF1508ASL-20JC84 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 84-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 64
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.31x29.31)
ATF1508ASL-20JC84 FAQ
1.How can I place an order for ATF1508ASL-20JC84 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508ASL-20JC84 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-20JC84 reliable?
The price and inventory of ATF1508ASL-20JC84 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508ASL-20JC84 is usually 5 days.
3.What payment methods are accepted for ATF1508ASL-20JC84?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508ASL-20JC84 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508ASL-20JC84?
ATF1508ASL-20JC84 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508ASL-20JC84 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-20JC84?
For technical support, including ATF1508ASL-20JC84 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508ASL-20JC84 requirements.
6.How does Aetrix verify that ATF1508ASL-20JC84 is sourced from the original manufacturer or authorized distributors?
All ATF1508ASL-20JC84 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-20JC84 meets industry standards.
7.What is the process for return or replacement of ATF1508ASL-20JC84?
All ATF1508ASL-20JC84 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508ASL-20JC84, 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-20JC84 part is unused and in its original packaging.
Return procedure for ATF1508ASL-20JC84:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508ASL-20JC84 Tags
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5M40ZE64C5N
Intel
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ATF1502ASV-15AU44
Microchip Technology
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5M80ZE64C5N
Intel
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5M80ZT100C5N
Intel
-
ATF1502AS-10AU44
Microchip Technology
-
ATF1502AS-10JU44
Microchip Technology
-
5M80ZE64I5N
Intel
-
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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