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Microchip Technology ATF1508ASL-25QC100
- Part No.:
- ATF1508ASL-25QC100
- Manufacturer:
- Microchip Technology
- Package:
- 100-BQFP
- Datasheet:
-
ATF1508ASL-25QC100.pdf
- Description:
- IC CPLD 128MC 25NS 100QFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,695
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Product details
Overview
ATF1508ASL-25QC100 from Microchip (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 support for 125 MHz registered operation. It features three global clock inputs, JTAG boundary-scan (IEEE 1149.1), in-system programmability, and PCI-compliant I/O drivers - deployed in industrial control logic, legacy bus interface adaptation, and FPGA companion glue logic.
For engineers reviewing the ATF1508ASL-25QC100 datasheet, ATF1508ASL-25QC100 pinout, ATF1508ASL-25QC100 application, or ATF1508ASL-25QC100 equivalent, key selection criteria include its 100-lead TQFP package, 5 V core / 3.3 V or 5 V I/O flexibility, automatic 10 µA standby ("L" version), programmable slew rate, and dual power-down pins (PD1/PD2) enabling sub-10 mA low-power states without external circuitry.
Technical Context
The ATF1508ASL-25QC100 implements a hierarchical routing architecture with a global bus feeding up to 40 signals per logic block, regional foldback buses supporting 21-term sum-of-products, and cascade chains enabling 40-product-term logic expansion. Its macrocell supports D/T/latch flip-flops, buried registered feedback within combinatorial outputs, and ITD (Input Transition Detection) on global clocks, inputs, and I/Os.
It integrates IEEE 1149.1-compliant JTAG BST with dedicated TDI/TDO/TMS/TCK pins, supports SVF-based ATE programming, and offers configurable power-up reset hysteresis (small/large). The device uses dual VCC supplies: VCCINT (5.0 V only) for internal logic and input buffers, and VCCIO (2.7–5.5 V) for output drive level selection - enabling mixed-voltage system interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 128 macrocells - provides gate-equivalent capacity for replacing multiple 74-series TTL/SSI/MSI devices or classic PLDs in compact control logic. |
| Pin-to-pin Delay | 7.5 ns maximum - enables reliable timing closure in 125 MHz registered designs with minimal external buffering. |
| Operating Voltage | VCCINT = 5.0 V (fixed); VCCIO = 2.7–3.6 V (3.3 V I/O) or 4.5–5.5 V (5.0 V I/O) - supports mixed-voltage board design and legacy 5 V TTL/PCI interfacing. |
| Power Modes | Automatic 10 µA standby ("L" version); pin-controlled ≤10 mA power-down (PD1/PD2); per-macrocell reduced-power bit - delivers scalable energy efficiency across idle, active, and deep-sleep states. |
| JTAG Support | IEEE 1149.1-1990/1149.1a-1993 compliant boundary-scan + ISP - enables in-circuit test, debug, and field firmware updates without device removal. |
| I/O Capability | Up to 96 bi-directional I/O + 4 dedicated inputs (GCLK1/GCLK2/GCLK3/GCLR/OE1/OE2) - allows flexible clocking, reset, and output-enable routing per macrocell. |
| PCI Compliance | Fully compliant with PCI 2.2 DC/AC specs including VOH ≥2.4 V @ –2 mA, VOL ≤0.55 V @ 3–6 mA, and ±44 mA AC drive - suitable for add-in card control logic without external bus transceivers. |
Pinout & Package
ATF1508ASL-25QC100 is housed in a 100-lead Thin Quad Flat Package (TQFP) with 0.5 mm pitch, RoHS-compliant, green (Pb/Halide-free) construction. Thermal pad exposed on underside for enhanced heat dissipation in industrial environments.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–25, 26–50, 51–75, 76–100 | I/O or dedicated function | 96 general-purpose I/O pins + 4 dedicated inputs (GCLK1, GCLK2, GCLK3, GCLR) + JTAG (TDI/TDO/TMS/TCK) + PD1/PD2 + VCCIO/VCCINT/GND - all configurable via fuse map; unused pins default to high-Z. |
| GCLK1–GCLK3 | Global clock input | Three independent global clock sources feed all macrocells; each can be selected as clock, clock enable, or ITD trigger - critical for multi-domain synchronous logic. |
| GCLR | Global clear input | Asynchronous reset signal for all macrocell flip-flops; may be OR'd with product-term AR for selective reset - ensures deterministic state machine initialization. |
| PD1 / PD2 | Power-down control | Active-high pins forcing device into ≤10 mA power-down mode; latches internal state and outputs - enables rapid wake-up without reconfiguration. |
| TDI / TDO / TMS / TCK | JTAG boundary-scan interface | Standard 4-pin IEEE 1149.1 port for programming, verification, and board-level test; configurable as I/O if JTAG disabled in design. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable pin-keeper | Prevents floating inputs/I/Os by retaining last driven logic level - eliminates need for external pull-ups and reduces system noise and static power. |
| Buried registered feedback | Enables combinatorial output macrocells to generate registered feedback internally - increases effective logic density and simplifies state machine implementation. |
| ITD (Input Transition Detection) | Detects edges on global clocks, inputs, and I/Os without consuming macrocell resources - supports asynchronous event capture and low-latency interrupt generation. |
| Output slew rate control | Per-pin programmable slow/fast switching - reduces EMI and crosstalk on non-critical signals while preserving speed on timing-critical paths. |
| VCC power-up reset | Hysteresis-configurable (small/large) reset that initializes all registers at defined VCC threshold - ensures robust state machine startup across varying supply ramp rates. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Adapter |
|---|---|
|
Use Scenario: Adding isolated digital I/O channels to modular PLC backplanes using 24 V DC field signals and 5 V logic levels. IC Role / Device Role: Glue logic translating between opto-isolated input stages, relay driver outputs, and microcontroller SPI/parallel bus. Use Value: Replaces 8–12 discrete 74-series chips with single ATF1508ASL-25QC100; leverages 5 V tolerant inputs, programmable slew rate, and 10 µA standby for low-power remote modules. |
Use Scenario: Bridging ISA or VMEbus peripherals to modern ARM/FPGA-based controllers in test equipment upgrades. IC Role / Device Role: Address decoding, strobe generation, bus arbitration, and protocol conversion for 8/16-bit parallel data transfers. Use Value: Uses three global clocks and buried feedback to implement pipelined handshaking; PCI-compliant outputs drive legacy bus loads directly without level shifters. |
| FPGA Companion Control Logic | Automated Test Equipment (ATE) Pattern Generator |
|
Use Scenario: Offloading configuration, status monitoring, and safety interlock logic from Xilinx/Intel FPGAs in motor drives and power converters. IC Role / Device Role: Real-time fault detection, watchdog supervision, and GPIO multiplexing for FPGA configuration and debug interfaces. Use Value: JTAG daisy-chain capability enables shared boundary-scan test with FPGA; power-down mode reduces idle current in battery-backed systems. |
Use Scenario: Generating precise timing waveforms and stimulus patterns for IC functional testing in production ATE platforms. IC Role / Device Role: High-speed pattern sequencer with deterministic 7.5 ns propagation, register-controlled waveform edge alignment, and glitch-free state transitions. Use Value: 125 MHz registered operation and ITD circuits enable sub-8 ns edge placement accuracy; programmable open-collector outputs drive multiple DUT pins simultaneously. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1508AS-25QC100 | No automatic 10 µA standby; higher ICC1 (160–180 mA vs. 10 µA); same pinout, timing, and feature set otherwise. | Suitable where continuous operation dominates and ultra-low standby is unnecessary - e.g., mains-powered instrumentation. | Select ATF1508ASL-25QC100 for battery or energy-harvested systems; choose ATF1508AS-25QC100 when cost sensitivity outweighs standby power savings. |
| XCR3128XL-10VQ100C | Xilinx CoolRunner-II; 128 macrocells; 10 ns tPD; 1.8 V core; 3.3 V I/O; no built-in PCI drivers or ITD circuits. | Lacks native PCI compliance and input transition detection; requires external level-shifting for 5 V bus interfacing. | Choose XCR3128XL-10VQ100C for low-voltage, high-volume consumer designs; retain ATF1508ASL-25QC100 for industrial 5 V systems requiring PCI, ITD, or seamless 5 V integration. |
Compared with ATF1508AS-25QC100, the "L" variant delivers 4-orders-of-magnitude lower standby current without sacrificing speed or I/O drive strength; versus XCR3128XL-10VQ100C, it retains full 5 V compatibility, integrated PCI drivers, and hardware-accelerated edge detection - making it uniquely suited for retrofitting legacy industrial hardware.
Availability
ATF1508ASL-25QC100 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface adaptation, and FPGA companion control logic requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for ATF1508ASL-25QC100 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, design tools, and long-term manufacturing commitments.
The ATF1508AS(L) series was designed for high-reliability industrial and automotive-adjacent control logic - emphasizing in-system programmability, mixed-voltage I/O, and robust power management in legacy-system upgrade scenarios.
FAQ
What is the core supply voltage requirement for ATF1508ASL-25QC100?
The ATF1508ASL-25QC100 requires VCCINT = 5.0 V ±5% (commercial) or ±10% (industrial) - this supply powers internal logic and input buffers. VCCIO may be independently set to 2.7–3.6 V (3.3 V I/O) or 4.5–5.5 V (5.0 V I/O) to match system bus levels. Both supplies must be present for operation; VCCINT cannot be omitted or reduced.
Does ATF1508ASL-25QC100 support in-system programming (ISP) without removing the device from the PCB?
Yes, ATF1508ASL-25QC100 supports full IEEE 1149.1-compliant in-system programming via its dedicated TDI/TDO/TMS/TCK pins. Programming uses 5 V TTL-level signals and does not require high-voltage VPP - enabling field updates, manufacturing programming, and ATE integration without socketing or rework. The JTAG port remains functional even after security fuse programming.
How does the power-down mode work on ATF1508ASL-25QC100, and what happens to I/O states during it?
When PD1 or PD2 is driven high (with power-down enabled in the design file), ATF1508ASL-25QC100 enters a ≤10 mA state where all internal logic and registered outputs are latched. Outputs retain their last valid logic level or high-Z state; inputs are blocked except the active PD pin. Pin-keeper circuits remain active to prevent floating, ensuring deterministic behavior upon wake-up.
Can ATF1508ASL-25QC100 drive PCI bus signals directly without external transceivers?
Yes, ATF1508ASL-25QC100 is fully PCI 2.2 compliant: its outputs meet VOH ≥2.4 V @ –2 mA and VOL ≤0.55 V @ 3–6 mA under specified conditions, and its AC drive meets ±44 mA sink/source requirements. This allows direct connection to 5 V PCI slots - eliminating external bus drivers in add-in card designs.
What is the purpose of the ITD (Input Transition Detection) feature in ATF1508ASL-25QC100?
ITD circuits on GCLK1–GCLK3, inputs, and I/O pins detect rising/falling edges asynchronously and generate internal pulses without consuming macrocell logic - enabling low-latency interrupt generation, event counting, or edge-triggered state transitions. ITD is configurable per pin and operates independently of clock domains, making it ideal for real-time monitoring tasks.
ATF1508ASL-25QC100 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 100-BQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Programmable Type:
- In System Programmable (min 10K program/erase cycles)
- Delay Time tpd(1) Max:
- 25 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-PQFP (14x20)
ATF1508ASL-25QC100 FAQ
1.How can I place an order for ATF1508ASL-25QC100 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508ASL-25QC100 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-25QC100 reliable?
The price and inventory of ATF1508ASL-25QC100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508ASL-25QC100 is usually 5 days.
3.What payment methods are accepted for ATF1508ASL-25QC100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508ASL-25QC100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508ASL-25QC100?
ATF1508ASL-25QC100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508ASL-25QC100 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-25QC100?
For technical support, including ATF1508ASL-25QC100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508ASL-25QC100 requirements.
6.How does Aetrix verify that ATF1508ASL-25QC100 is sourced from the original manufacturer or authorized distributors?
All ATF1508ASL-25QC100 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-25QC100 meets industry standards.
7.What is the process for return or replacement of ATF1508ASL-25QC100?
All ATF1508ASL-25QC100 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508ASL-25QC100, 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-25QC100 part is unused and in its original packaging.
Return procedure for ATF1508ASL-25QC100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508ASL-25QC100 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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