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Microchip Technology ATF1508AS-15JI84
- Part No.:
- ATF1508AS-15JI84
- Manufacturer:
- Microchip Technology
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
ATF1508AS-15JI84.pdf
- Description:
- IC CPLD 128MC 15NS 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,295
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Product details
Overview
ATF1508AS-15JI84 from Microchip Technology (formerly Atmel) is a high-performance, electrically-erasable Complex Programmable Logic Device (CPLD) with 128 macrocells, 5 product terms per macrocell (expandable to 40), and 7.5 ns pin-to-pin delay. It operates up to 125 MHz in registered mode, supports JTAG-based in-system programming (ISP), and targets logic consolidation in industrial control, PCI-compliant interfaces, and legacy TTL replacement.
For engineers reviewing the ATF1508AS-15JI84 datasheet, ATF1508AS-15JI84 pinout, ATF1508AS-15JI84 application, or ATF1508AS-15JI84 equivalent, key selection criteria include its 84-lead PLCC package, dual VCCINT/VCCIO supply architecture (5V core / 3.3V or 5V I/O), programmable power-down via PD1/PD2 pins, and IEEE 1149.1 boundary-scan compliance.
Technical Context
The ATF1508AS-15JI84 implements a hierarchical routing architecture with a global bus feeding all 128 macrocells and regional foldback buses enabling up to 40-product-term sum-of-products logic per chain. Its macrocell supports D/T/latch flip-flops, individual product-term clock enables, asynchronous reset/preset, and buried registered feedback within combinatorial outputs.
It features three global clock inputs (GCLK1–GCLK3), input transition detection (ITD) on clocks and I/Os, programmable slew rate and open-collector output options, and pin-keeper circuits for floating-input immunity. Power management includes automatic 10 µA standby (L-version), pin-controlled 1 mA power-down, and per-macrocell reduced-power mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 128 macrocells - provides gate count equivalent to ~2000 usable gates for medium-complexity glue logic integration |
| Pin-to-pin Delay | 7.5 ns - enables reliable operation in 133 MHz system timing paths with margin |
| Max Registered Frequency | 125 MHz - supports high-speed synchronous control in data acquisition and interface bridging |
| Supply Voltages | VCCINT = 5.0 V (fixed); VCCIO = 3.3 V or 5.0 V - allows mixed-voltage board interfacing without level shifters |
| Package | 84-lead PLCC (J-lead) - through-hole compatible, RoHS-compliant, industrial temperature rated (−40°C to +85°C) |
| JTAG Support | IEEE 1149.1-1990/1149.1a-1993 compliant - enables boundary-scan test and ISP without device removal |
| Power-down Current | <10 mA - achieved via PD1/PD2 assertion; retains register and output states during low-power hold |
Pinout & Package
ATF1508AS-15JI84 is housed in an 84-lead Plastic Leaded Chip Carrier (PLCC) package with J-shaped leads, suitable for socketed or reflow-soldered industrial applications. The package supports full thermal and mechanical reliability across −40°C to +85°C ambient.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–11, 13–25, 27–32, 34–40, 42–53, 55–60, 62–73, 75–84 | I/O or dedicated input | Bi-directional logic I/O; some pins double as GCLR, OE1/OE2, GCLK1–GCLK3, or PD1/PD2 |
| 12, 33, 41, 54, 61, 74 | GND | Ground reference for core and I/O domains; six dedicated ground pins reduce noise coupling |
| 26, 47, 59, 70 | VCCIO | 3.3V or 5.0V I/O supply - powers output drivers and input buffers; must be decoupled locally |
| 46, 77 | VCCINT | 5.0V core supply - powers internal logic, macrocells, and routing; not tolerant of 3.3V |
| 7, 8, 9, 10 | JTAG TDI/TMS/TCK/TDO | IEEE 1149.1 boundary-scan and ISP interface - configurable as general-purpose I/O if JTAG disabled |
| 37, 38 | PD1 / PD2 | Power-down control inputs - high-level assertion places device into sub-10 mA hold state with latched outputs |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Pin-keeper | Prevents floating inputs/I/Os from drifting to indeterminate voltage - eliminates need for external pull-ups and reduces system noise |
| Buried Registered Feedback | Enables dual-latch behavior within single macrocell - supports compact state machine implementation without external routing |
| PCI-compliant Output Drivers | Meets PCI DC/AC specs (e.g., VOL ≤ 0.55 V at 3 mA, IOH ≥ −44 mA) - allows direct connection to PCI bus without buffer ICs |
| Three Global Clock Inputs | Supports independent clock domains (e.g., system clock, ADC sampling clock, UART baud rate generator) without resource contention |
| Security Fuse + User Signature | One-time programmable fuse blocks readback; two bytes of user-accessible signature store revision or project ID regardless of fuse state |
Applications
| Industrial PLC I/O Expansion | PCI Bus Interface Logic |
|---|---|
Use Scenario: Adding isolated digital input/output channels to a programmable logic controller chassis with legacy TTL backplane. IC Role / Device Role / Timing Role: Glue logic CPLD implementing address decoding, strobe generation, and bidirectional data buffering between microcontroller and opto-isolated I/O modules. Use Value: Replaces 8–12 discrete TTL chips; leverages 128 macrocells and 7.5 ns delay to meet 100 kHz scan cycle timing with deterministic latency. |
Use Scenario: Adapting a custom ASIC or FPGA to a standard PCI slot for embedded instrumentation. IC Role / Device Role / Timing Role: Protocol-compliant interface logic handling PCI address/data multiplexing, DEVSEL# assertion, and PAR generation. Use Value: Uses native PCI drive strength (−44 mA IOH, 95 mA IOL) and meets setup/hold timing via 125 MHz registered paths - avoids external bus transceivers. |
| Legacy System Modernization | Field-Upgradeable Control Logic |
Use Scenario: Replacing obsolete PAL/GAL devices in avionics maintenance test equipment with field-programmable equivalents. IC Role / Device Role / Timing Role: Combinatorial and registered logic block consolidating address mapping, interrupt arbitration, and EEPROM interface control. Use Value: Enables in-system reprogramming via JTAG without board removal - critical for certified hardware where physical access is restricted. |
Use Scenario: Embedded motor controller requiring firmware-triggered logic updates for new sensor calibration algorithms. IC Role / Device Role / Timing Role: Configurable state machine managing PWM sequencing, fault monitoring, and CAN message framing based on runtime parameters. Use Value: Uses power-down mode (PD1/PD2) to suspend logic during idle cycles - reduces average ICC by >90% versus continuous operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1508AS-10JI84 | 10 ns propagation delay (vs. 7.5 ns); same macrocell count, package, and feature set | Suitable for lower-speed designs where timing margin is relaxed; consumes less dynamic power at equivalent frequency | Select when 125 MHz registered operation is not required and cost optimization is prioritized |
| XC95144XL-10TQ100I | Xilinx CoolRunner-II family; 144 macrocells, 100-pin TQFP; 5V-tolerant I/O but requires 3.3V core supply | Better suited for new designs targeting higher density and lower static current (<10 µA standby); lacks native PCI drive capability | Choose for green-field projects needing longer lifecycle support and lower power; not drop-in compatible due to pinout and voltage architecture differences |
Compared with ATF1508AS-15JI84, the -10JI84 offers relaxed timing at lower cost but sacrifices 133 MHz system compatibility, while the XC95144XL provides greater macrocell count and modern low-power operation but requires PCB redesign and loses direct PCI bus drive capability.
Availability
ATF1508AS-15JI84 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, PCI bus interface logic, and legacy system modernization requiring stable component supply, long-term obsolescence management, and RoHS-compliant through-hole packaging.
Supply support for ATF1508AS-15JI84 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 family, including datasheets, programming tools, and technical documentation for legacy PLD designs.
The ATF1508AS series was designed for high-reliability, in-system programmable logic consolidation in industrial, communications, and aerospace applications where long-lifecycle support and proven electrically-erasable technology are essential.
FAQ
What is the operating temperature range for ATF1508AS-15JI84?
The ATF1508AS-15JI84 is rated for industrial temperature operation from −40°C to +85°C. This specification is guaranteed per the device's qualification testing and applies to all electrical parameters in the datasheet under specified VCCINT and VCCIO conditions. The "I" suffix in the part number explicitly denotes industrial grade, distinguishing it from commercial-grade variants.
Does ATF1508AS-15JI84 support both 3.3V and 5.0V I/O interfaces simultaneously?
Yes, ATF1508AS-15JI84 supports mixed I/O voltages via separate VCCIO pins. All VCCIO pins must be tied to the same voltage rail - either 3.3V (2.7–3.6V) or 5.0V (4.75–5.25V) - but that rail can interface with external 3.3V or 5.0V logic depending on configured drive strength and voltage thresholds. VCCINT remains fixed at 5.0V.
How does the power-down mode function on ATF1508AS-15JI84?
When enabled in the design file, asserting PD1 or PD2 high places ATF1508AS-15JI84 into a sub-10 mA power-down state. Internal logic states and registered outputs are latched; high-Z outputs remain high-Z. Input signals (except PD pins) are ignored until PD returns low. The macrocell associated with the PD pin cannot serve as a logic input but retains buried logic functionality.
Is ATF1508AS-15JI84 pin-compatible with other ATF1508AS package variants?
No - ATF1508AS-15JI84 uses an 84-lead PLCC package, while other variants use 100-lead TQFP/PQFP or 160-lead PQFP. Pin functions are consistent across the family (e.g., GCLK1 on pin 44 in PLCC matches pin 44 in 100-TQFP), but physical pin count, layout, and thermal characteristics differ. Migration requires PCB redesign and signal integrity validation.
Can ATF1508AS-15JI84 be programmed without a dedicated programmer?
Yes - ATF1508AS-15JI84 supports JTAG-based in-system programming (ISP) using standard IEEE 1149.1 tools. Programming is performed via the four dedicated TDI/TMS/TCK/TDO pins using 5V TTL-level signals. Atmel-provided software and SVF file generation enable integration with ATE systems or custom microcontroller-based programmers.
ATF1508AS-15JI84 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:
- 15 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)
ATF1508AS-15JI84 FAQ
1.How can I place an order for ATF1508AS-15JI84 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508AS-15JI84 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 ATF1508AS-15JI84 reliable?
The price and inventory of ATF1508AS-15JI84 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508AS-15JI84 is usually 5 days.
3.What payment methods are accepted for ATF1508AS-15JI84?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508AS-15JI84 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508AS-15JI84?
ATF1508AS-15JI84 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508AS-15JI84 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 ATF1508AS-15JI84?
For technical support, including ATF1508AS-15JI84 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508AS-15JI84 requirements.
6.How does Aetrix verify that ATF1508AS-15JI84 is sourced from the original manufacturer or authorized distributors?
All ATF1508AS-15JI84 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 ATF1508AS-15JI84 meets industry standards.
7.What is the process for return or replacement of ATF1508AS-15JI84?
All ATF1508AS-15JI84 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508AS-15JI84, 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 ATF1508AS-15JI84 part is unused and in its original packaging.
Return procedure for ATF1508AS-15JI84:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508AS-15JI84 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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