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Home > Products > Integrated Circuits (ICs) > Embedded > CPLDs (Complex Programmable Logic Devices)

Microchip Technology ATF1508ASV-15JC84

Name: ATF1508ASV-15JC84
Brand: Microchip Technology
SKU: ATF1508ASV-15JC84
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ATF1508ASV-15JC84

Manufacturer:: Microchip Technology

Category:: CPLDs (Complex Programmable Logic Devices)

Package:: 84-LCC (J-Lead)

Datasheet:: ATF1508ASV-15JC84.pdf

Description:: IC CPLD 128MC 15NS 84PLCC

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Product details

Overview

ATF1508ASV-15JC84 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 programmability (ISP), and is packaged in an 84-lead PLCC for industrial control and legacy board upgrades.

For engineers reviewing the ATF1508ASV-15JC84 datasheet, ATF1508ASV-15JC84 pinout, ATF1508ASV-15JC84 application, or ATF1508ASV-15JC84 equivalent, this device serves as a drop-in replacement for TTL/MSI logic and older PLDs in space-constrained, reprogrammable control applications requiring deterministic timing, low-power standby, and boundary-scan testability.

Technical Context

The ATF1508ASV-15JC84 implements a hierarchical CPLD architecture with eight logic blocks, each fed by a global bus carrying up to 100 signals-including all I/Os, dedicated inputs, and buried macrocell feedback-and a regional foldback bus enabling up to 40-product-term cascade logic per chain. Its macrocell structure integrates five product terms, OR/XOR/cascade logic, configurable D/T/latch flip-flops, and programmable output enable/slew rate.

It supports IEEE 1149.1 JTAG boundary-scan testing and ISP via TDI/TMS/TCK/TDO pins, includes three global clock inputs (GCLK1–GCLK3), two power-down pins (PD1/PD2), and input transition detection (ITD) circuits on clocks, inputs, and I/Os-enabling robust state-machine initialization and glitch-immune control signal sampling.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Density	128 macrocells - provides gate count equivalent to ~2,000 usable gates for replacing discrete TTL/MSI logic or legacy PAL/GAL devices.
Propagation Delay	15 ns max pin-to-pin - guarantees deterministic timing for synchronous control paths in industrial interfaces and data acquisition systems.
Maximum Clock Frequency	77 MHz registered operation - enables high-speed state machines and glue logic in PCI-compliant and embedded controller applications.
Supply Voltage Range	3.0 V to 3.6 V - compatible with 3.3 V system rails and tolerant of nominal 3.3 V ±10% variation without level-shifting.
Standby Current	5 µA in "L" mode - allows battery-backed or energy-sensitive operation during idle periods without external power gating.
I/O Count	Up to 96 bi-directional I/Os + 4 dedicated inputs - supports dense peripheral interfacing while retaining global control signal routing flexibility.
Program/Erase Cycles	10,000 cycles - ensures field-upgradable firmware logic over extended product lifecycles in deployed equipment.

Pinout & Package

ATF1508ASV-15JC84 is housed in an 84-lead plastic leaded chip carrier (PLCC) package with J-bend leads, designed for through-hole or surface-mount socketed deployment in industrial and legacy PCB environments. The package supports reflow and wave soldering per JEDEC standards and provides mechanical stability for high-vibration applications.

Pin	Circuit Role	Design Meaning
1	INPUT/GCLR	Global asynchronous clear input - resets all macrocell registers simultaneously; active-low, internally pulled up when unused.
2	INPUT/OE2/GCLK2	Multi-function pin - selectable as global output enable #2 or global clock #2; enables synchronized tri-state control or clock domain partitioning.
12, 45	I/O/PD1, I/O/PD2	Power-down control inputs - drive high to enter sub-5 mA standby; latches internal state and holds outputs valid during sleep.
14	I/O/TDI	JTAG Test Data In - serial input for boundary-scan instruction/data loading and ISP programming; pull-up enabled by design option.
23	I/O/TMS	JTAG Test Mode Select - controls TAP controller state transitions; pull-up enabled by design option to ensure defined reset behavior.
62	I/O/TCK	JTAG Test Clock - synchronizes all JTAG operations at up to 10 MHz; requires clean, monotonic edges for reliable scan integrity.
71	I/O/TDO	JTAG Test Data Out - serial output for boundary-scan readback and ISP verification; high-impedance when TAP is not active.
81	I/O/GCLK3	Global clock input #3 - feeds clock tree to all logic blocks; supports ITD circuitry for edge-triggered input sampling independent of system clock.
83, 84	INPUT/GCLK1, INPUT/OE1	Dedicated global clock #1 and output enable #1 - decouples clock distribution from I/O control, reducing routing congestion in pin-locked designs.

Key Features

Feature	Design Value
Flexible Macrocell Configuration	Each of 128 macrocells supports D/T/latch flip-flops, buried registered feedback in combinatorial outputs, and individual product-term clock enables - enabling efficient state-machine and arithmetic logic synthesis.
Enhanced Routing Resources	Global bus (100+ signals) + regional foldback bus + 40-signal switch matrix per block - increases successful place-and-route yield for pin-locked revisions and reduces need for redesign iterations.
Advanced Power Management	Automatic 5 µA standby, pin-controlled power-down (<5 mA), per-macrocell reduced-power bit, and programmable pin-keeper - eliminates floating inputs and cuts dynamic/static power without external components.
JTAG Boundary-Scan & ISP	Fully compliant with IEEE 1149.1-1990/1149.1a-1993; enables in-circuit programming, structural test, and debug without device removal - critical for manufacturing test and field firmware updates.
Security & Traceability	One-time programmable security fuse prevents bitstream copying; 16-bit user signature register stores project ID/revision - supports IP protection and BOM traceability in OEM production.

Applications

Industrial Motion Control	Legacy System Glue Logic Replacement
Use Scenario: Real-time coordination of stepper motor direction, enable, and step pulses in CNC controllers using FPGA-hosted motion engines. IC Role / Device Role / Timing Role: CPLD acts as deterministic interface translator between FPGA timing engine and 24 V DC motor drivers, enforcing setup/hold on enable signals and debouncing limit-switch inputs. Use Value: 15 ns pin-to-pin delay ensures sub-microsecond response to emergency stop signals; JTAG ISP enables field updates to pulse-width modulation logic without hardware revision.	Use Scenario: Replacing obsolete 22V10 PALs and 74-series TTL in avionics maintenance test sets where PCB layout cannot be modified. IC Role / Device Role / Timing Role: Emulates multiple legacy logic devices in single 84-PLCC footprint; uses dedicated GCLK/GCLR pins to replicate synchronous reset behavior of original designs. Use Value: Pin-compatible migration path preserves existing PCBs; 10,000-program-cycle endurance supports repeated calibration logic updates across 15+ year service life.
PCI-Compliant Peripheral Interface	Boundary-Scan Test Infrastructure
Use Scenario: Implementing address decode, burst control, and parity generation for add-in cards in industrial PCs with PCI slots. IC Role / Device Role / Timing Role: Acts as PCI target interface logic - samples AD[31:0] and C/BE#[3:0] on IRDY# assertion, generates DEVSEL# and TRDY#, and manages byte-enable masking. Use Value: PCI compliance verified per specification; 3.3 V tolerance and 77 MHz clocking meet PCI v2.2 timing requirements for 33 MHz bus operation.	Use Scenario: Enabling automated structural test of densely routed backplane assemblies in telecom shelf controllers. IC Role / Device Role / Timing Role: Provides IEEE 1149.1 boundary-scan cells on all 96 I/Os and 4 dedicated inputs - captures interconnect faults between FPGAs, ADCs, and power management ICs. Use Value: Reduces ICT test development time by 40%; BSDL model available from Microchip ensures compatibility with commercial ATE platforms like Teradyne and Keysight.

Industrial Motion Control

Legacy System Glue Logic Replacement

Use Scenario: Real-time coordination of stepper motor direction, enable, and step pulses in CNC controllers using FPGA-hosted motion engines.

IC Role / Device Role / Timing Role: CPLD acts as deterministic interface translator between FPGA timing engine and 24 V DC motor drivers, enforcing setup/hold on enable signals and debouncing limit-switch inputs.

Use Value: 15 ns pin-to-pin delay ensures sub-microsecond response to emergency stop signals; JTAG ISP enables field updates to pulse-width modulation logic without hardware revision.

Use Scenario: Replacing obsolete 22V10 PALs and 74-series TTL in avionics maintenance test sets where PCB layout cannot be modified.

IC Role / Device Role / Timing Role: Emulates multiple legacy logic devices in single 84-PLCC footprint; uses dedicated GCLK/GCLR pins to replicate synchronous reset behavior of original designs.

Use Value: Pin-compatible migration path preserves existing PCBs; 10,000-program-cycle endurance supports repeated calibration logic updates across 15+ year service life.

PCI-Compliant Peripheral Interface

Boundary-Scan Test Infrastructure

Use Scenario: Implementing address decode, burst control, and parity generation for add-in cards in industrial PCs with PCI slots.

IC Role / Device Role / Timing Role: Acts as PCI target interface logic - samples AD[31:0] and C/BE#[3:0] on IRDY# assertion, generates DEVSEL# and TRDY#, and manages byte-enable masking.

Use Value: PCI compliance verified per specification; 3.3 V tolerance and 77 MHz clocking meet PCI v2.2 timing requirements for 33 MHz bus operation.

Use Scenario: Enabling automated structural test of densely routed backplane assemblies in telecom shelf controllers.

IC Role / Device Role / Timing Role: Provides IEEE 1149.1 boundary-scan cells on all 96 I/Os and 4 dedicated inputs - captures interconnect faults between FPGAs, ADCs, and power management ICs.

Use Value: Reduces ICT test development time by 40%; BSDL model available from Microchip ensures compatibility with commercial ATE platforms like Teradyne and Keysight.

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 speed grade, 144-pin TQFP; higher density but larger footprint and no PLCC option.	Better suited for new designs requiring >128 macrocells; lacks PD1/PD2 power-down pins and pin-keeper option.	Select when upgrading logic capacity is prioritized over footprint compatibility and ultra-low standby current.
ATF1508ASVL-15JC84	Identical functionality and pinout; "L" suffix denotes guaranteed 5 µA standby current (vs. standard 115 mA) across full temperature range.	Required for battery-powered or thermally constrained deployments where <10 µA quiescent current is mandatory.	Choose for industrial temperature (-40°C to +85°C) applications demanding lowest possible standby power without changing layout or firmware.

Compared with XCR3256XL-10TQ144I and ATF1508ASVL-15JC84, the ATF1508ASV-15JC84 offers optimal balance of legacy-compatible PLCC packaging, deterministic 15 ns timing, and JTAG-enabled field programmability - making it uniquely suitable for cost-sensitive, space-constrained retrofits where PCB change is prohibited.

Availability

ATF1508ASV-15JC84 is available at Aetrix Electronics and suitable for industrial motion control, legacy system glue logic replacement, and PCI-compliant peripheral interface applications requiring stable component supply and long-term obsolescence mitigation.

Supply support for ATF1508ASV-15JC84 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 - ensuring long-term reliability and documentation access.

The ATF1508ASV series was designed for reprogrammable digital control in industrial, automotive, and communications equipment - emphasizing pin-locked design evolution, in-system update capability, and robustness in harsh operating environments.

FAQ

What is the maximum operating frequency of the ATF1508ASV-15JC84 in registered mode?

The ATF1508ASV-15JC84 supports registered logic operation up to 77 MHz, as confirmed by its -15 speed grade AC characteristics table. This maximum frequency applies to global clock domains (GCLK1–GCLK3) with all macrocells configured for D-type flip-flop operation and reduced-power bits disabled. The device achieves this performance while maintaining 15 ns pin-to-pin delay and full JTAG boundary-scan functionality - making the ATF1508ASV-15JC84 suitable for real-time control loops in industrial PLCs and motor drives.

Does the ATF1508ASV-15JC84 support in-system programming (ISP), and what interface is required?

Yes, the ATF1508ASV-15JC84 supports full in-system programming via its 4-pin JTAG interface (TDI, TMS, TCK, TDO), compliant with IEEE Std. 1149.1-1990 and 1149.1a-1993. Programming is performed using 3.3 V TTL-level signals; no external high-voltage programming supply is needed. The ATF1508ASV-15JC84 can be programmed while soldered on the board using Microchip's official ISP tools or third-party SVF-compatible ATE systems - eliminating socket handling and enabling field firmware updates without hardware intervention.

What power management features does the ATF1508ASV-15JC84 offer beyond standard standby mode?

Beyond its 5 µA automatic standby mode, the ATF1508ASV-15JC84 provides pin-controlled power-down (via PD1/PD2), per-macrocell reduced-power bit configuration, programmable pin-keeper circuits, and VCC power-up reset with selectable hysteresis. These features collectively reduce static and dynamic power in mixed-signal systems - for example, enabling the ATF1508ASV-15JC84 to maintain valid output states and latch internal logic during sleep while consuming less than 5 mA, and eliminating external pull-up resistors on unused I/Os.

Can the JTAG pins on the ATF1508ASV-15JC84 be used as general-purpose I/Os?

Yes - the JTAG pins (TDI, TMS, TCK, TDO) on the ATF1508ASV-15JC84 are configurable as general-purpose I/Os when JTAG boundary-scan and ISP functions are disabled in the design file. This reconfiguration recovers four additional logic resources without altering the 84-PLCC footprint. However, doing so forfeits in-circuit programming and structural test capability; the ATF1508ASV-15JC84 must then be programmed externally before assembly, and post-solder test coverage is reduced.

What is the purpose and behavior of the PD1 and PD2 pins on the ATF1508ASV-15JC84?

The PD1 and PD2 pins on the ATF1508ASV-15JC84 serve as active-high power-down control inputs. When either pin is driven high (and power-down mode is enabled in the design), the ATF1508ASV-15JC84 enters a low-current state (<5 mA), latching all internal register states and holding outputs valid - including those in high-Z. Input signals (except PD1/PD2) are blocked during power-down, and pin-keeper circuits prevent floating I/Os. This feature enables rapid wake-up and deterministic restart in energy-conscious industrial subsystems.

ATF1508ASV-15JC84 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:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 84-PLCC (29.31x29.31)

ATF1508ASV-15JC84 FAQ

1.How can I place an order for ATF1508ASV-15JC84 through Aetrix?

Please submit a Request for Quotation (RFQ) for ATF1508ASV-15JC84 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-15JC84 reliable?

The price and inventory of ATF1508ASV-15JC84 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508ASV-15JC84 is usually 5 days.

3.What payment methods are accepted for ATF1508ASV-15JC84?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508ASV-15JC84 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ATF1508ASV-15JC84?

ATF1508ASV-15JC84 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ATF1508ASV-15JC84 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-15JC84?

For technical support, including ATF1508ASV-15JC84 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508ASV-15JC84 requirements.

6.How does Aetrix verify that ATF1508ASV-15JC84 is sourced from the original manufacturer or authorized distributors?

All ATF1508ASV-15JC84 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-15JC84 meets industry standards.

7.What is the process for return or replacement of ATF1508ASV-15JC84?

All ATF1508ASV-15JC84 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508ASV-15JC84, 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-15JC84 part is unused and in its original packaging.

Return procedure for ATF1508ASV-15JC84:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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