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Microchip Technology ATF1508ASL-25JU84
- Part No.:
- ATF1508ASL-25JU84
- Manufacturer:
- Microchip Technology
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
ATF1508ASL-25JU84.pdf
- Description:
- IC CPLD 128MC 25NS 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:147
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Product details
Overview
ATF1508ASL-25JU84 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, in-system programmability, and operates with 5.0 V VCCINT and 3.3/5.0 V VCCIO. It is used in legacy PCI-compliant interface logic, industrial control state machines, and reconfigurable glue logic.
For engineers reviewing the ATF1508ASL-25JU84 datasheet, ATF1508ASL-25JU84 pinout, ATF1508ASL-25JU84 application, or ATF1508ASL-25JU84 equivalent, key selection criteria include its 84-pin PLCC package, low-power "L" standby mode (10 µA), programmable slew rate, pin-keeper inputs, and dual-voltage I/O compatibility - all critical for power-sensitive, field-upgradable embedded systems requiring deterministic timing and secure configuration.
Technical Context
The ATF1508ASL-25JU84 implements a hierarchical CPLD architecture with 128 flexible macrocells, each offering five product terms expandable to 40 via cascade logic, plus buried feedback routed to a global bus carrying up to 100 signals. Its routing switch matrix selects 40 signals per logic block, enabling high utilization in pin-locked designs.
It integrates IEEE 1149.1 JTAG boundary-scan testing, Fast ISP programming, PCI-compliant I/O drivers (±44 mA high-side, +206 mA low-side), and advanced power management including automatic 10 µA standby, pin-controlled power-down (PD1/PD2), and per-macrocell reduced-power mode - all configurable without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 128 macrocells - supports integration of multiple TTL/SSI/MSI functions into single device |
| Pin-to-pin Delay | 7.5 ns - enables reliable operation in 125 MHz registered logic paths |
| Max Registered Frequency | 125 MHz - suitable for high-speed control logic and data-path sequencing |
| Supply Voltages | VCCINT = 5.0 V (fixed); VCCIO = 3.3 V or 5.0 V - allows mixed-voltage system interfacing |
| Standby Current | 10 µA (L-version) - eliminates need for external power gating in battery-backed systems |
| JTAG Compliance | IEEE 1149.1-1990 & 1149.1a-1993 - enables standardized board-level test and debug |
| I/O Count | Up to 96 bi-directional I/O + 4 dedicated inputs - provides ample connectivity for complex glue logic |
Pinout & Package
ATF1508ASL-25JU84 is housed in an 84-lead Plastic Leaded Chip Carrier (PLCC) package with J-lead geometry, 1.27 mm pitch, and body size 29.31 mm × 29.31 mm. The package is RoHS-compliant, Pb-free, and rated for industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–84 (see top view) | Bi-directional I/O or dedicated input | All pins support configurable I/O direction; dedicated pins (e.g., GCLK1–GCLK3, GCLR, OE1/OE2) double as global control signals |
| GCLK1, GCLK2, GCLK3 | Global clock input | Three independent clock domains; each supports ITD (input transition detection) for asynchronous edge capture |
| GCLR | Global clear input | Asynchronous reset for all macrocell flip-flops; may be OR'd with product-term reset |
| OE1, OE2 | Output enable input | Control macrocell output enables; true/complement selectable per macrocell via fitter |
| PD1, PD2 | Power-down control | Active-high pins that force device into <10 mA power-down mode; internal states latched, outputs held |
| TCK, TMS, TDI, TDO | JTAG boundary-scan interface | Standard 4-pin IEEE 1149.1 port; supports ISP programming and board-level test without external hardware |
| VCCINT | Internal logic supply | Must be connected to 5.0 V ±5%; powers input buffers and core logic; compatible with 3.3 V or 5.0 V inputs |
| VCCIO | I/O driver supply | Configurable for 3.3 V or 5.0 V; sets output voltage swing and drive strength (PCI-compliant at 5 V) |
| GND | Ground reference | Multiple GND pins distributed across package to minimize noise and ensure signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Programmable pin-keeper | Prevents floating inputs/I/Os without external pull-ups; reduces system noise and DC power consumption |
| Per-macrocell reduced-power bit | Individually disables unused logic resources to cut dynamic current - critical for thermal-constrained designs |
| Combinatorial output with registered feedback | Enables dual-latch behavior within single macrocell - increases functional density without extra logic blocks |
| VCC power-up reset with hysteresis option | Ensures deterministic state-machine initialization; Large hysteresis reduces ICC by hundreds of µA |
| Security fuse + User Signature | Fuse prevents unauthorized readback; two bytes (16 bits) remain readable for revision tracking regardless of fuse state |
| PCI-compliant I/O drivers | Meets PCI v2.2 DC/AC specs: VOH ≥ 2.4 V @ –2 mA, VOL ≤ 0.55 V @ 3/6 mA, ±44 mA AC sourcing/sinking |
Applications
| Industrial PLC Backplane Interface | Legacy PCI Add-in Card Glue Logic |
|---|---|
|
Use Scenario: Interfacing microcontroller buses to discrete I/O modules in modular automation racks with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Configurable address decoder, strobe synchronizer, and interrupt arbiter - implementing combinatorial and registered logic with sub-10 ns propagation. Use Value: Eliminates 12+ discrete TTL chips; leverages pin-keeper and 10 µA standby to meet <50 mW idle power budget. |
Use Scenario: Replacing obsolete PAL/GAL devices on aging PCI-based data acquisition cards requiring field-upgradable firmware. IC Role / Device Role / Timing Role: Bus controller, IDSEL decoder, and configuration register mapper - operating at 33 MHz with PCI-compliant drive strength. Use Value: JTAG ISP enables in-field reprogramming without card removal; security fuse protects proprietary register mapping logic. |
| Automotive Diagnostic Tool Bootloader Sequencer | Medical Equipment Power-Up State Manager |
|
Use Scenario: Managing boot sequence and communication handshaking between MCU and CAN transceiver in OBD-II diagnostic tools. IC Role / Device Role / Timing Role: Synchronized reset generator, protocol-state latch, and voltage-rail monitor interface - using GCLR and power-up reset with large hysteresis. Use Value: Ensures deterministic startup under noisy 12 V automotive supply; pin-keeper holds CAN lines during reset to prevent bus contention. |
Use Scenario: Coordinating power sequencing and safety interlocks across isolated analog/digital subsystems in portable ultrasound units. IC Role / Device Role / Timing Role: Multi-rail power-good sequencer, fault latch, and watchdog timer interface - using three global clocks for independent timing domains. Use Value: Per-macrocell reduced-power mode cuts idle current below 100 µA; industrial temp rating ensures reliability at 55°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XCR3256XL-10TQ144I | 256 macrocells, 10 ns delay, 3.3 V only, no VCCINT/VCCIO separation | Higher density but lacks 5 V tolerance and PCI drive capability | Choose for new 3.3 V-only designs needing >128 macrocells; not drop-in for ATF1508ASL-25JU84 |
| EPM7128SLC84-10 | 128 macrocells, 10 ns delay, 5 V only, no JTAG ISP (requires UV erasure) | No in-system programmability; requires socketed UV-erasable programming | Consider only if JTAG ISP and security fuse are unnecessary; incompatible with field updates |
Compared with XCR3256XL-10TQ144I and EPM7128SLC84-10, the ATF1508ASL-25JU84 uniquely combines 5 V-tolerant I/O, PCI compliance, automatic 10 µA standby, and JTAG-based security - making it irreplaceable in legacy industrial and medical systems requiring mixed-voltage operation and field firmware updates.
Availability
ATF1508ASL-25JU84 is available at Aetrix Electronics and suitable for industrial PLC backplanes, legacy PCI add-in cards, and medical equipment power sequencing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ATF1508ASL-25JU84 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 legacy ATF CPLD family, including design tools, documentation, and long-term manufacturing commitments.
The ATF1508ASL series was designed for high-reliability, field-upgradable glue logic in industrial, medical, and telecom infrastructure - emphasizing in-system programmability, low-power standby, and robust I/O drive for legacy bus standards like PCI.
FAQ
What is the difference between ATF1508ASL-25JU84 and the standard ATF1508AS version?
The "L" suffix denotes the low-power variant: ATF1508ASL-25JU84 delivers automatic 10 µA standby current when idle, whereas the standard ATF1508AS consumes ~160 mA in standby. Both share identical logic architecture, pinout, and JTAG ISP capability, but only the "L" version supports this ultra-low quiescent current - essential for battery-backed or thermally constrained applications where the ATF1508ASL-25JU84 is deployed.
Does ATF1508ASL-25JU84 support 3.3 V I/O operation while maintaining 5 V internal logic?
Yes. ATF1508ASL-25JU84 uses separate VCCINT (5.0 V) and VCCIO (3.3 V or 5.0 V) supplies. VCCINT powers the core logic and input buffers - ensuring compatibility with both 3.3 V and 5.0 V input signals - while VCCIO sets the output driver voltage and strength. This dual-supply architecture allows the ATF1508ASL-25JU84 to interface safely with 3.3 V FPGAs or microcontrollers while retaining full 5 V PCI-compliant drive capability when needed.
Can ATF1508ASL-25JU84 be programmed in-system after soldering to the PCB?
Yes. ATF1508ASL-25JU84 supports IEEE 1149.1 JTAG in-system programming (ISP) via its TCK/TMS/TDI/TDO pins. No socket or UV eraser is required. Programming can be performed using Microchip's official ISP tools or third-party SVF-compatible ATE equipment. The ATF1508ASL-25JU84 remains fully functional during and after ISP, with pin-keeper circuitry preserving I/O states throughout the process.
What does the "25" in ATF1508ASL-25JU84 signify?
The "25" indicates the speed grade: 7.5 ns maximum pin-to-pin propagation delay, corresponding to a 125 MHz maximum registered operating frequency. This speed bin is confirmed by AC characterization across industrial temperature range (–40°C to +85°C) and applies to all signal paths - including combinatorial outputs, registered outputs, and global clock-to-output timing - as specified in the ATF1508ASL-25JU84 datasheet.
Is the ATF1508ASL-25JU84 RoHS-compliant and halogen-free?
Yes. ATF1508ASL-25JU84 is manufactured in a green, Pb-free, halide-free package compliant with RoHS Directive 2011/65/EU. The 84-lead PLCC package uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level (MSL) 3. Full compliance documentation, including material declarations and test reports, is available from Microchip upon request for the ATF1508ASL-25JU84.
ATF1508ASL-25JU84 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 84-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Programmable:
- Not Verified
- Programmable Type:
- In System Programmable (min 10K program/erase cycles)
- Delay Time tpd(1) Max:
- 25 ns
- Voltage Supply - Internal:
- 4.5V ~ 5.5V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 128
- Number of Gates:
- -
- Number of I/O:
- 64
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.31x29.31)
ATF1508ASL-25JU84 FAQ
1.How can I place an order for ATF1508ASL-25JU84 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508ASL-25JU84 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-25JU84 reliable?
The price and inventory of ATF1508ASL-25JU84 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508ASL-25JU84 is usually 5 days.
3.What payment methods are accepted for ATF1508ASL-25JU84?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508ASL-25JU84 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508ASL-25JU84?
ATF1508ASL-25JU84 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508ASL-25JU84 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-25JU84?
For technical support, including ATF1508ASL-25JU84 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508ASL-25JU84 requirements.
6.How does Aetrix verify that ATF1508ASL-25JU84 is sourced from the original manufacturer or authorized distributors?
All ATF1508ASL-25JU84 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-25JU84 meets industry standards.
7.What is the process for return or replacement of ATF1508ASL-25JU84?
All ATF1508ASL-25JU84 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508ASL-25JU84, 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-25JU84 part is unused and in its original packaging.
Return procedure for ATF1508ASL-25JU84:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508ASL-25JU84 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
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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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