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Microchip Technology ATF1508ASV-15JU84
- Part No.:
- ATF1508ASV-15JU84
- Manufacturer:
- Microchip Technology
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
ATF1508ASV-15JU84.pdf
- Description:
- IC CPLD 128MC 15NS 84PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ATF1508ASV-15JU84 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, and 15 ns maximum pin-to-pin delay. It operates from 3.0V to 3.6V, supports registered operation up to 77 MHz, and features JTAG-based in-system programmability (ISP) and IEEE 1149.1 boundary-scan testing - used in industrial control logic consolidation and legacy TTL replacement.
For engineers reviewing the ATF1508ASV-15JU84 datasheet, ATF1508ASV-15JU84 pinout, ATF1508ASV-15JU84 application, or ATF1508ASV-15JU84 equivalent, key selection criteria include its 84-lead PLCC package, 3.3V-compatible I/O structure, programmable slew rate and open-collector output options, and dual power-down pins (PD1/PD2) enabling sub-5 mA standby current.
Technical Context
The ATF1508ASV-15JU84 implements a hierarchical CPLD architecture with eight logic chains supporting up to 40-product-term sum-of-products logic via cascade paths. Its global bus carries all 100+ inputs and buried macrocell feedback signals, while each logic block's switch matrix selects up to 40 signals for routing into macrocell product term arrays.
Each of the 128 macrocells integrates configurable D/T/latch flip-flops, individual output enable control, programmable pin-keeper circuits, and ITD (Input Transition Detection) on global clocks and I/Os. The device supports VCC power-up reset with selectable hysteresis and includes two dedicated power-down pins (PD1, PD2) that latch internal states and hold outputs valid during <5 mA power-down mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 128 macrocells - enables integration of multiple SSI/MSI TTL functions or classic PLDs into single device. |
| Pin-to-Pin Delay | 15 ns max - guarantees timing closure for 66 MHz system clock domains with margin. |
| Operating Voltage | 3.0V–3.6V - compatible with 3.3V logic families and industrial power rails without level-shifting. |
| Max Clock Frequency | 77 MHz registered operation - supports high-speed state machines and synchronous control logic. |
| Power-down Current | <5 mA - achieved via PD1/PD2 assertion; preserves register and output states without external hold circuitry. |
| JTAG Compliance | IEEE 1149.1-1990 & 1149.1a-1993 - enables boundary-scan test, ISP programming, and BSDL-based verification. |
| I/O Count | Up to 96 bi-directional I/O + 4 dedicated inputs - provides flexible signal routing for mixed-logic interface consolidation. |
Pinout & Package
ATF1508ASV-15JU84 is packaged in an 84-lead PLCC (Plastic Leaded Chip Carrier) with 0.05-inch lead pitch, surface-mount compatible, and RoHS-compliant. The package supports reflow soldering and offers mechanical robustness for industrial environments.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | INPUT/GCLR | Global asynchronous clear input - resets all macrocell registers simultaneously; may be OR'd with product term. |
| 2 | INPUT/OE2/GCLK2 | Multi-function pin - configurable as global output enable #2 or global clock #2; enables shared control resource allocation. |
| 12, 45 | I/O/PD1, I/O/PD2 | Dual power-down control - asserting either pin places device in low-power latched state; disables logic transitions but holds outputs. |
| 14 | I/O/TDI | JTAG Test Data In - serial input for boundary-scan instruction/data loading; pull-up option available in design. |
| 23 | I/O/TMS | JTAG Test Mode Select - controls TAP controller state machine; pull-up option reduces external component count. |
| 62 | I/O/TCK | JTAG Test Clock - synchronizes boundary-scan and ISP operations; requires clean 50% duty cycle clock. |
| 71 | I/O/TDO | JTAG Test Data Out - serial output for scan chain readback; supports daisy-chained multi-device testing. |
| 81 | I/O/GCLK3 | Third global clock input - allows independent clock domain management for multi-rate logic partitioning. |
| 83, 84 | INPUT/GCLK1, INPUT/OE1 | Dedicated global clock #1 and output enable #1 - decouples timing and drive control for critical I/O groups. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Pin-keeper | Prevents floating inputs/I/Os by retaining last driven state - eliminates need for external pull-ups and reduces system noise. |
| Reduced-power Macrocell Bit | Individually disables unused logic resources per macrocell - cuts dynamic power without affecting functional integrity. |
| Combinatorial Output with Registered Feedback | Enables dual-latch behavior within single macrocell - supports complex sequential logic without consuming extra macrocells. |
| ITD Circuits on Global Clocks & I/O | Detects input transitions independently of clock edges - enables asynchronous event capture for interrupt generation. |
| VCC Power-up Reset with Large Hysteresis | Guarantees reliable initialization at 3.0V supply - prevents metastability in state machines during brown-out conditions. |
Applications
| Industrial PLC I/O Expansion | Legacy System TTL Replacement |
|---|---|
|
Use Scenario: Replacing discrete 74-series logic in programmable logic controller backplanes to reduce component count and improve reliability. IC Role / Device Role / Timing Role: CPLD implementing address decoding, bus arbitration, and status multiplexing across multiple I/O modules. Use Value: 128 macrocells consolidate >20 TTL packages; 15 ns delay ensures compatibility with 20 MHz ISA-style bus timing. |
Use Scenario: Modernizing aging test equipment control boards originally built with PALs and GALs. IC Role / Device Role / Timing Role: Drop-in logic replacement with identical pinout mapping and JEDEC fuse pattern compatibility. Use Value: In-system programmability enables field firmware updates without board removal; JTAG BSDL support simplifies test coverage. |
| Automated Test Equipment (ATE) Sequencer | Medical Device Safety Logic |
|
Use Scenario: Generating precise stimulus patterns and response sampling windows in semiconductor ATE platforms. IC Role / Device Role / Timing Role: High-speed registered logic sequencer synchronized to 77 MHz master clock with deterministic setup/hold margins. Use Value: Fast registered input from product term and tSU = 11 ns guarantee timing predictability under varying load conditions. |
Use Scenario: Implementing redundant safety interlocks and watchdog logic in Class II medical instruments. IC Role / Device Role / Timing Role: Fail-safe combinatorial decision engine with power-up reset and latch-up immunity (200 mA). Use Value: 20-year data retention and 10,000 program/erase cycles ensure long-term field reliability; security fuse prevents IP tampering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1508ASVL-15JU84 | "L" version adds automatic 5 µA standby mode; same pinout, timing, and logic resources. | Better suited for battery-powered or ultra-low-quiescent systems where continuous low-power operation is required. | Select ATF1508ASVL-15JU84 only if sub-10 µA standby is mandatory; otherwise ATF1508ASV-15JU84 offers identical functionality with simpler power-down control. |
| XCR3256XL-10TQ144I | Xilinx CoolRunner-II device with 256 macrocells, 10 ns speed grade, and 3.3V core; different pinout and JTAG implementation. | Higher density and lower static power, but requires PCB redesign and toolchain migration. | Choose XCR3256XL-10TQ144I only when scaling beyond 128 macrocells is needed; not a drop-in replacement due to incompatible pin mapping and BSDL structure. |
Compared with ATF1508ASVL-15JU84, the ATF1508ASV-15JU84 trades automatic ultra-low standby for explicit PD-pin control - giving designers deterministic power-state entry/exit. Against XCR3256XL-10TQ144I, it offers proven legacy compatibility and simpler tooling at lower density, avoiding layout changes.
Availability
ATF1508ASV-15JU84 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy TTL replacement, and automated test equipment requiring stable component supply, long lifecycle support, and verified RoHS compliance.
Supply support for ATF1508ASV-15JU84 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 programming tools.
The ATF1508ASV series was designed for high-reliability logic consolidation in industrial, medical, and test equipment - emphasizing in-system programmability, power management, and long-term data retention over raw speed.
FAQ
What is the maximum operating frequency of the ATF1508ASV-15JU84 in registered mode?
The ATF1508ASV-15JU84 supports registered operation up to 77 MHz, as confirmed by its -15 speed grade AC characteristics (fCNT = 76.9 MHz minimum). This value is measured under worst-case commercial conditions with VCC = 3.0V and accounts for tSU = 11 ns setup time and tH = 0 ns hold time. The ATF1508ASV-15JU84 achieves this using three global clock pins and fast registered input paths from product terms.
Does the ATF1508ASV-15JU84 support in-system programming (ISP), and what interface is used?
Yes, the ATF1508ASV-15JU84 supports full in-system programming via its 4-pin JTAG interface compliant with IEEE Std. 1149.1-1990 and 1149.1a-1993. Programming uses standard 5V TTL-level signals on TDI, TMS, TCK, and TDO pins. The ATF1508ASV-15JU84 can be programmed without removal from the PCB, and SVF files generated by Atmel ISP software enable ATE integration.
How does the power-down feature work on the ATF1508ASV-15JU84, and what happens to outputs during power-down?
The ATF1508ASV-15JU84 has two dedicated power-down pins (PD1 and PD2) - asserting either pin reduces supply current to <5 mA while latching all internal register states and holding registered/combinatorial outputs valid. Outputs in high-Z remain high-Z. Input signals (except PD pin) are blocked, but pin-keeper circuits maintain I/O states. The ATF1508ASV-15JU84 resumes normal operation within 1 µs after PD is de-asserted.
Can the JTAG pins on the ATF1508ASV-15JU84 be reused as general-purpose I/Os?
Yes - the JTAG function is a programmable option. When JTAG boundary-scan and ISP are disabled in the design file, the four JTAG pins (TDI, TMS, TCK, TDO) become available as general-purpose I/Os, adding flexibility for pin-constrained designs. The ATF1508ASV-15JU84 retains pull-up capability on TMS and TDI even in I/O mode, reducing external component count.
What packaging and temperature range does the ATF1508ASV-15JU84 support?
The ATF1508ASV-15JU84 is supplied in an 84-lead PLCC package (JU84 suffix) and is rated for the commercial temperature range (0°C to +70°C). It is RoHS-compliant, Pb/halide-free, and qualified for reflow soldering. While other variants exist in TQFP/PQFP and industrial temperature grades, the ATF1508ASV-15JU84 specifically denotes the 84-pin PLCC commercial version.
ATF1508ASV-15JU84 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:
- 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-15JU84 FAQ
1.How can I place an order for ATF1508ASV-15JU84 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508ASV-15JU84 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-15JU84 reliable?
The price and inventory of ATF1508ASV-15JU84 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508ASV-15JU84 is usually 5 days.
3.What payment methods are accepted for ATF1508ASV-15JU84?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508ASV-15JU84 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508ASV-15JU84?
ATF1508ASV-15JU84 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508ASV-15JU84 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-15JU84?
For technical support, including ATF1508ASV-15JU84 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508ASV-15JU84 requirements.
6.How does Aetrix verify that ATF1508ASV-15JU84 is sourced from the original manufacturer or authorized distributors?
All ATF1508ASV-15JU84 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-15JU84 meets industry standards.
7.What is the process for return or replacement of ATF1508ASV-15JU84?
All ATF1508ASV-15JU84 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508ASV-15JU84, 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-15JU84 part is unused and in its original packaging.
Return procedure for ATF1508ASV-15JU84:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508ASV-15JU84 Tags
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5M40ZE64C5N
Intel
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ATF1502ASV-15AU44
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5M80ZE64I5N
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