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Microchip Technology ATF1508ASV-15JI84
- Part No.:
- ATF1508ASV-15JI84
- Manufacturer:
- Microchip Technology
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
ATF1508ASV-15JI84.pdf
- Description:
- IC CPLD 128MC 15NS 84PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ATF1508ASV-15JI84 from Microchip Technology (formerly Atmel) is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 128 macrocells, 15 ns maximum pin-to-pin delay, and operation across 3.0V–3.6V supply. It supports registered logic up to 77 MHz, features JTAG-based in-system programming (ISP), and is packaged in an 84-lead PLCC for industrial temperature range (–40°C to +85°C). It serves as a drop-in replacement for TTL/MSI logic in control-plane glue logic, state machine implementation, and interface bridging.
For engineers reviewing the ATF1508ASV-15JI84 datasheet, ATF1508ASV-15JI84 pinout, ATF1508ASV-15JI84 application, or ATF1508ASV-15JI84 equivalent, this page delivers verified macrocell count, timing parameters, JTAG boundary-scan compliance (IEEE 1149.1a), power-down modes, and PLCC-specific pin mapping - all confirmed against Atmel's Rev. 1408H specification.
Technical Context
The ATF1508ASV-15JI84 implements a hierarchical CPLD architecture with eight logic chains, each supporting up to 40-product-term sum-of-products logic via cascade expansion. Its global bus feeds all 128 macrocells with up to 100 input signals, while each macrocell provides five base product terms expandable to 40 using foldback and regional bus routing.
It integrates three dedicated global clock pins (GCLK1–GCLK3), two programmable power-down pins (PD1/PD2), and IEEE 1149.1a-compliant JTAG test access port (TCK/TMS/TDI/TDO) with pull-up options on TMS/TDI. Input transition detection (ITD) circuits are present on global clocks, inputs, and I/Os - enabled by default in non-"Z" variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Macrocell Count | 128 macrocells with buried feedback to global bus - enables high gate utilization and logic density without external feedback routing. |
| Max Pin-to-pin Delay | 15 ns (–15 speed grade) - guarantees deterministic timing for synchronous designs operating up to 77 MHz registered frequency. |
| Supply Voltage Range | 3.0 V to 3.6 V - compatible with 3.3 V systems; supports VCCIO/VCCINT separation in multi-voltage board designs. |
| JTAG Compliance | IEEE Std. 1149.1-1990 and 1149.1a-1993 - enables boundary-scan testing, ISP, and BSDL-based verification without external programmers. |
| Standby Current | 5 µA in "L" mode - ultra-low quiescent current for battery-backed or always-on control logic applications. |
| Package & Temp | 84-lead PLCC, industrial grade (–40°C to +85°C) - suitable for ruggedized embedded control and telecom infrastructure. |
| Logic Inputs | Up to 100 global bus inputs - accommodates wide data buses, address decoding, and multi-signal status aggregation. |
Pinout & Package
ATF1508ASV-15JI84 is housed in an 84-lead plastic leaded chip carrier (PLCC) package with J-lead profile, designed for socketed or surface-mount assembly in industrial environments. Pin 1 is marked by a notch on the top-left corner of the package body.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | INPUT/GCLR | Global asynchronous clear input - resets all macrocell flip-flops simultaneously; can be OR'd with product-term reset. |
| 2 | INPUT/OE2/GCLK2 | Multi-function pin: global output enable #2 or global clock #2 - configurable per macrocell in design software. |
| 12, 45 | I/O/PD1 | Bi-directional I/O with power-down control - when asserted high, forces device into sub-5 mA standby; disables logic but retains register states. |
| 14 | I/O/TDI | JTAG Test Data In - serial input for boundary-scan instruction/data; includes programmable internal pull-up. |
| 23 | I/O/TMS | JTAG Test Mode Select - controls TAP controller state machine; includes programmable internal pull-up. |
| 62 | I/O/TCK | JTAG Test Clock - synchronous clock for scan operations; must meet tFSU/tFH setup/hold requirements. |
| 71 | I/O/TDO | JTAG Test Data Out - serial output driven only during SHIFT-DR/SHIFT-IR states; high-impedance otherwise. |
| 81 | I/O/GCLK3 | Third global clock input - enables triple-clock-domain designs (e.g., system clock, ADC trigger, UART baud rate). |
| 83, 84 | INPUT/GCLK1, INPUT/OE1 | Dedicated global clock #1 and output enable #1 - decouples clocking and tri-state control from I/O resource allocation. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Pin-keeper | Prevents floating inputs/I/Os by latching last-driven state - eliminates need for external pull-ups and reduces system noise and DC leakage. |
| Fast Input Transition Detection (ITD) | Detects edges on GCLKs, inputs, and I/Os without consuming macrocell resources - enables glitch-free interrupt generation and edge-triggered sampling. |
| Three Global Clock Pins | Supports independent clock domains for control, data path, and peripheral interfaces - avoids clock domain crossing logic and simplifies timing closure. |
| VCC Power-up Reset Option | Configurable hysteresis (Small/Large) ensures reliable state-machine initialization at 3.3 V - Large hysteresis recommended for low-VCC margin applications. |
| Open-collector Output Option | Enables wired-OR interrupt lines shared across multiple devices - supports legacy bus arbitration and shared status signaling. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Bridging |
|---|---|
Use Scenario: Extending discrete I/O points in programmable logic controllers using parallel GPIO expansion. IC Role / Device Role / Timing Role: Glue logic CPLD implementing address decoding, strobe generation, and bidirectional data bus control between microcontroller and peripheral ICs. Use Value: 128 macrocells and 15 ns timing allow real-time response to field sensor inputs while maintaining deterministic scan-cycle execution under 100 µs. | Use Scenario: Translating between ISA, PCI, and custom parallel control buses in test equipment and instrumentation. IC Role / Device Role / Timing Role: Protocol translator and timing adapter managing handshaking, wait-state insertion, and voltage-level shifting. Use Value: JTAG ISP enables field firmware updates to adapt to new host interface revisions without hardware changes or rework. |
| Telecom Line Card Control | Automated Test Equipment (ATE) Sequencing |
Use Scenario: Managing power sequencing, alarm monitoring, and LED status reporting on modular line cards in central office switches. IC Role / Device Role / Timing Role: State machine controller coordinating hot-swap events, fault isolation, and supervisory signaling over backplane links. Use Value: Industrial temperature rating (–40°C to +85°C) and 20-year data retention ensure long-term reliability in uncooled chassis environments. | Use Scenario: Generating precise stimulus patterns and capturing response signatures during semiconductor wafer probing. IC Role / Device Role / Timing Role: High-speed pattern generator with sub-15 ns timing resolution and deterministic output enable control. Use Value: 77 MHz registered operation and programmable slew rate reduce EMI during high-frequency test vector transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1508ASVL-15JI84 | Same die, "L" suffix denotes automatic 5 µA standby mode; identical pinout and AC specs. | Preferred where ultra-low quiescent current is mandatory (e.g., battery-backed systems); no functional trade-offs. | Select ATF1508ASVL-15JI84 if automatic low-power entry is required without external control logic. |
| XCR3128XL-10VQ100I | Xilinx CoolRunner-II CPLD: 128 macrocells, 10 ns speed, 100-pin VQFP; higher I/O count (96 vs. 80), no PD pins. | Better suited for high-I/O-count designs requiring more than 80 user pins; lacks pin-controlled power-down but offers lower static current (10 µA typical). | Choose XCR3128XL-10VQ100I when board layout supports VQFP and >80 I/Os are needed; verify JTAG BSDL compatibility with existing test infrastructure. |
Compared with ATF1508ASVL-15JI84, the ATF1508ASV-15JI84 requires explicit PD pin assertion for low-power mode, offering finer control over wake-up latency; versus XCR3128XL-10VQ100I, it provides native PLCC packaging and integrated ITD circuits - critical for edge-sensitive control logic in legacy industrial systems.
Availability
ATF1508ASV-15JI84 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, telecom line card control, and automated test equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ATF1508ASV-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 ATF1508ASV family, including datasheets, BSDL models, and legacy design tools.
The ATF1508ASV series was engineered for high-reliability, in-system programmable glue logic in industrial, telecom, and instrumentation applications - emphasizing robustness, JTAG testability, and long-term data retention.
FAQ
What is the maximum operating frequency of the ATF1508ASV-15JI84?
The ATF1508ASV-15JI84 supports registered logic operation up to 77 MHz, validated by its –15 speed grade (15 ns maximum pin-to-pin delay). This frequency applies to global clock domains; array clock paths support up to 76.9 MHz. The actual achievable frequency depends on logic depth, routing congestion, and whether reduced-power mode is enabled - which adds up to 13 ns (tRPA) to key timing paths.
Does the ATF1508ASV-15JI84 support in-system programming (ISP)?
Yes, the ATF1508ASV-15JI84 supports full in-system programming via its 4-pin JTAG interface (TCK/TMS/TDI/TDO), compliant with IEEE Std. 1149.1a-1993. Programming can be performed without removing the device from the PCB using SVF files, Atmel's ISP software, or third-party ATE tools - enabling field updates and manufacturing flexibility.
What is the purpose of the PD1 and PD2 pins on the ATF1508ASV-15JI84?
The PD1 and PD2 pins on the ATF1508ASV-15JI84 provide pin-controlled power-down functionality. When asserted high, either pin reduces supply current to below 5 mA while latching all register and output states. These pins cannot serve as general-purpose I/O when power-down is enabled, but their associated macrocells retain buried logic capability for cascade/foldback use.
How does the ATF1508ASV-15JI84 handle power-up initialization?
The ATF1508ASV-15JI84 includes a VCC-powered reset circuit with selectable hysteresis (Small/Large). With Large hysteresis enabled - recommended for 3.0 V–3.3 V operation - registers initialize reliably after VCC crosses ~2.3 V, and ICC drops by several hundred µA. Users must ensure monotonic VCC rise and meet setup/hold times before first clock edge to guarantee deterministic state-machine startup.
Can the JTAG pins on the ATF1508ASV-15JI84 be used as general-purpose I/O?
Yes, the JTAG pins (TCK/TMS/TDI/TDO) on the ATF1508ASV-15JI84 can be repurposed as user I/O when JTAG boundary-scan and ISP functions are disabled in the design file. Disabling JTAG frees four additional logic resources and removes BSDL constraints - but eliminates in-circuit testability and field-programming capability for that device instance.
ATF1508ASV-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:
- 3V ~ 3.6V
- 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)
ATF1508ASV-15JI84 FAQ
1.How can I place an order for ATF1508ASV-15JI84 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508ASV-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 ATF1508ASV-15JI84 reliable?
The price and inventory of ATF1508ASV-15JI84 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508ASV-15JI84 is usually 5 days.
3.What payment methods are accepted for ATF1508ASV-15JI84?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508ASV-15JI84 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508ASV-15JI84?
ATF1508ASV-15JI84 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508ASV-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 ATF1508ASV-15JI84?
For technical support, including ATF1508ASV-15JI84 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508ASV-15JI84 requirements.
6.How does Aetrix verify that ATF1508ASV-15JI84 is sourced from the original manufacturer or authorized distributors?
All ATF1508ASV-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 ATF1508ASV-15JI84 meets industry standards.
7.What is the process for return or replacement of ATF1508ASV-15JI84?
All ATF1508ASV-15JI84 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508ASV-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 ATF1508ASV-15JI84 part is unused and in its original packaging.
Return procedure for ATF1508ASV-15JI84:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508ASV-15JI84 Tags
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5M40ZE64C5N
Intel
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ATF1502ASV-15AU44
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5M80ZE64C5N
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ATF1502AS-10AU44
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ATF1502AS-10JU44
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5M80ZE64I5N
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5M80ZT100I5N
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5M160ZE64C5N
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