Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Microchip Technology ATF1508AS-10JC84

Name: ATF1508AS-10JC84
Brand: Microchip Technology
SKU: ATF1508AS-10JC84
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ATF1508AS-10JC84

Manufacturer:: Microchip Technology

Category:: CPLDs (Complex Programmable Logic Devices)

Package:: 84-LCC (J-Lead)

Datasheet:: ATF1508AS-10JC84.pdf

Description:: IC CPLD 128MC 10NS 84PLCC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,776

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ATF1508AS-10JC84 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 3.3 V or 5.0 V I/O operation. It features three global clock inputs, JTAG boundary-scan (IEEE 1149.1), in-system programmability, and PCI-compliant output drivers - used in legacy industrial control logic consolidation and FPGA companion glue logic.

For engineers reviewing the ATF1508AS-10JC84 datasheet, ATF1508AS-10JC84 pinout, ATF1508AS-10JC84 application, or ATF1508AS-10JC84 equivalent, key selection criteria include its 84-lead PLCC package, 125 MHz registered operation, dual VCCINT/VCCIO supply architecture, and power-down mode controlled via PD1/PD2 pins - all critical for retrofitting aging 5 V systems with low-risk logic upgrades.

Technical Context

The ATF1508AS-10JC84 implements a hierarchical CPLD architecture with eight logic blocks, each fed by a 40-signal global bus derived from 96 I/Os, four dedicated inputs, and buried macrocell feedback. Its macrocell supports D/T/latch flip-flops, XOR-based arithmetic, and combinatorial outputs with registered feedback - enabling efficient state machine and wide decoder implementation.

It integrates IEEE 1149.1 JTAG TAP controller for boundary-scan testing and ISP programming, plus PCI-compliant drive strength (±44 mA AC high, +206 mA AC low at 0.71 V) and configurable slew rate per output. Power management includes automatic 10 µA standby ("L" version), pin-controlled 1 mA power-down, and per-macrocell reduced-power bit.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Density	128 macrocells - provides gate count equivalent to ~2,000 usable PLD gates for medium-complexity glue logic replacement.
Propagation Delay	7.5 ns max pin-to-pin - enables reliable operation in 125 MHz registered designs with setup/hold margin for 5 V TTL interfaces.
I/O Voltage Support	3.3 V or 5.0 V - VCCIO pins independently configurable; VCCINT fixed at 5.0 V - allows mixed-voltage board interfacing without level shifters.
Global Clock Inputs	Three dedicated GCLK pins (GCLK1–GCLK3) - supports multi-domain synchronous design with independent clock domains per logic block.
JTAG Compliance	IEEE Std. 1149.1-1990 & 1149.1a-1993 - enables production test access and field firmware updates without device removal.
PCI Drive Strength	IOH(AC) = –44 mA @ VOUT ≤ 1.4 V; IOL(AC) = +206 mA @ VOUT = 0.71 V - meets PCI Local Bus Rev 2.2 DC/AC requirements for slot driving.
Power-down Mode	Pin-controlled (PD1/PD2); ICC < 10 mA - preserves register and output states during idle; input transitions blocked until PD pin deasserted.

Pinout & Package

ATF1508AS-10JC84 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	Circuit Role	Design Meaning
1–10, 12–20, 22–32, 34–40, 42–53, 55–64, 66–75, 77–84	I/O or dedicated input	Bi-directional logic pin; configurable as input, output, or bidirectional; supports pin-keeper, open-collector, and slew-rate control.
11, 21, 41, 54, 65, 76	GND	Ground reference for VCCIO and VCCINT supplies; six dedicated ground pins ensure stable noise margin and decoupling.
33, 44, 56, 67, 78	VCCIO	I/O power supply pins - must be tied to same 3.3 V or 5.0 V rail; determines output voltage swing and input threshold levels.
45, 57	VCCINT	Core logic power supply - must be connected to 5.0 V ±5%; powers input buffers and internal logic array regardless of VCCIO setting.
68	INPUT/GCLR	Global asynchronous clear - active-low reset signal routed to all macrocell flip-flops; overrides clock and enables synchronous initialization.
69–71	INPUT/OE1, INPUT/OE2, INPUT/GCLK1	Dedicated control inputs - configurable as output enable (OE1/OE2) or global clock (GCLK1); each may be assigned per-macrocell.
72	I/O/GCLK3	Bi-directional global clock pin - functions as input-only GCLK3 when configured as clock; otherwise available as general-purpose I/O.
73–74	I/O/TDI, I/O/TMS	JTAG test data input and test mode select - used for boundary-scan and ISP; pull-up option available for TDI/TMS.
75	I/O/TDO	JTAG test data output - serial output for scan chain; high-impedance when not in BST mode.
79–80	I/O/TCK, I/O/PD1	JTAG test clock and power-down control - TCK drives TAP state machine; PD1 asserts hardware power-down when high.
81–82	I/O/PD2, I/O	Second power-down control and general I/O - PD2 provides redundant power-down trigger; both PD pins disable logic but retain latch states.

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.
Per-output slew rate control	Configurable fast/slow edge rates - slows non-critical outputs to suppress EMI while preserving timing on high-speed paths like clocks or strobes.
Buried registered feedback	Enables combinatorial output macrocells to feed registered signals back into logic array - supports dual-latch structures within single macrocell.
Input transition detection (ITD)	Detects edges on global clocks, inputs, and I/Os - used for asynchronous event capture without consuming macrocell resources.
User Signature register	16-bit accessible memory (2 bytes) - stores project ID, revision, or date; readable even when security fuse is programmed.
Security fuse protection	One-time programmable fuse disables readback of configuration bits - prevents unauthorized cloning while allowing functional verification.

Applications

Industrial PLC Backplane Interface	Legacy PCI Slot Glue Logic
Use Scenario: Replacing discrete TTL logic on aging programmable logic controller backplanes requiring deterministic timing and long-term component availability. IC Role / Device Role / Timing Role: CPLD implementing address decoding, interrupt arbitration, and bus transceiver control with 7.5 ns propagation guarantee. Use Value: Eliminates 12+ SSI/MSI ICs; maintains pin-compatible upgrade path for ATF1502AS/ATF1504AS; supports 5 V tolerant inputs at 0–70°C.	Use Scenario: Providing PCI-compliant control logic for add-in cards in industrial PCs where FPGA configuration space is constrained. IC Role / Device Role / Timing Role: PCI interface adapter generating FRAME#, IRDY#, TRDY#, and DEVSEL# with guaranteed drive strength per PCI Rev 2.2. Use Value: Delivers –44 mA IOH and +206 mA IOL at defined test points; avoids external buffer ICs; validated for 33 MHz PCI clock domain.
Automotive Body Control Module	Medical Equipment Timing Sequencer
Use Scenario: Consolidating door lock, window lift, and lighting control logic in under-hood modules operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade CPLD managing CAN/LIN peripheral handshaking, watchdog supervision, and GPIO expansion. Use Value: Supports extended temperature range; integrated power-down cuts quiescent current to <10 mA during sleep mode; pin-keeper holds safety-critical I/O states.	Use Scenario: Generating precise, jitter-free timing sequences for X-ray generator firing, pump actuation, and sensor sampling in Class II medical devices. IC Role / Device Role / Timing Role: Deterministic logic sequencer using three independent global clocks (GCLK1–GCLK3) to synchronize analog subsystems. Use Value: 125 MHz registered operation ensures sub-8 ns timing resolution; EEPROM-based configuration retains settings after power cycle; BSDL-supported JTAG enables field calibration traceability.

Industrial PLC Backplane Interface

Legacy PCI Slot Glue Logic

Use Scenario: Replacing discrete TTL logic on aging programmable logic controller backplanes requiring deterministic timing and long-term component availability.

IC Role / Device Role / Timing Role: CPLD implementing address decoding, interrupt arbitration, and bus transceiver control with 7.5 ns propagation guarantee.

Use Value: Eliminates 12+ SSI/MSI ICs; maintains pin-compatible upgrade path for ATF1502AS/ATF1504AS; supports 5 V tolerant inputs at 0–70°C.

Use Scenario: Providing PCI-compliant control logic for add-in cards in industrial PCs where FPGA configuration space is constrained.

IC Role / Device Role / Timing Role: PCI interface adapter generating FRAME#, IRDY#, TRDY#, and DEVSEL# with guaranteed drive strength per PCI Rev 2.2.

Use Value: Delivers –44 mA IOH and +206 mA IOL at defined test points; avoids external buffer ICs; validated for 33 MHz PCI clock domain.

Automotive Body Control Module

Medical Equipment Timing Sequencer

Use Scenario: Consolidating door lock, window lift, and lighting control logic in under-hood modules operating across –40°C to +85°C.

IC Role / Device Role / Timing Role: Industrial-grade CPLD managing CAN/LIN peripheral handshaking, watchdog supervision, and GPIO expansion.

Use Value: Supports extended temperature range; integrated power-down cuts quiescent current to <10 mA during sleep mode; pin-keeper holds safety-critical I/O states.

Use Scenario: Generating precise, jitter-free timing sequences for X-ray generator firing, pump actuation, and sensor sampling in Class II medical devices.

IC Role / Device Role / Timing Role: Deterministic logic sequencer using three independent global clocks (GCLK1–GCLK3) to synchronize analog subsystems.

Use Value: 125 MHz registered operation ensures sub-8 ns timing resolution; EEPROM-based configuration retains settings after power cycle; BSDL-supported JTAG enables field calibration traceability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar CPLD applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ATF1508AS-10JU84	Same die, 84-lead TQFP package (vs. PLCC); no lead bending; higher thermal dissipation.	Suitable for new PCB layouts prioritizing surface-mount reliability and automated assembly.	Select when redesigning for reflow-only processes; requires footprint change; identical logic functionality and timing.
ATF1508ASL-10JC84	"L" variant with automatic 10 µA standby (vs. standard 160 mA ICC1); same PLCC-84 package and pinout.	Preferred for battery-backed or energy-sensitive applications where ultra-low quiescent current is mandatory.	Choose for industrial systems requiring zero-power retention during brownout; shares full software toolchain and JEDEC file compatibility.

Compared with ATF1508AS-10JU84 and ATF1508ASL-10JC84, the ATF1508AS-10JC84 offers optimal cost-performance balance for through-hole retrofits and legacy 5 V board upgrades - retaining PLCC socket compatibility while delivering full PCI drive strength and JTAG ISP without layout changes.

Availability

ATF1508AS-10JC84 is available at Aetrix Electronics and suitable for industrial PLC backplane interface, legacy PCI slot glue logic, and automotive body control module applications requiring stable component supply and long-term obsolescence management.

Supply support for ATF1508AS-10JC84 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 ATF1500AS family of EE PLDs - a mature, high-reliability CPLD platform targeting industrial and automotive logic consolidation.

The ATF1508AS product line was designed for pin-compatible migration from TTL/SSI/MSI logic and early PLDs, emphasizing in-system programmability, PCI compliance, and extended temperature operation - serving as a bridge between discrete logic and modern FPGA-based systems.

FAQ

What is the maximum operating frequency of the ATF1508AS-10JC84 in registered mode?

The ATF1508AS-10JC84 supports registered operation up to 125 MHz, verified under industrial conditions (–40°C to +85°C) with 5.0 V VCCINT and VCCIO. This frequency is achievable with proper PCB layout, decoupling, and timing closure using Microchip's ispLEVER Classic design tools. The 7.5 ns pin-to-pin delay specification directly enables this performance ceiling in synchronous logic paths.

Does the ATF1508AS-10JC84 support both 3.3 V and 5.0 V I/O simultaneously?

No - the ATF1508AS-10JC84 supports either 3.3 V or 5.0 V I/O operation, but not both simultaneously. VCCIO pins must be tied to a single rail (2.7–3.6 V for 3.3 V mode; 4.75–5.25 V for 5.0 V mode), while VCCINT is always 5.0 V. Input thresholds and output drive strength scale accordingly; mixing rails on VCCIO will cause undefined behavior and potential damage.

How does the power-down mode function on the ATF1508AS-10JC84?

The ATF1508AS-10JC84 enters power-down mode when either PD1 or PD2 pin is driven high, reducing supply current to <10 mA. During power-down, all internal registers and output states are latched and held; inputs (except PD pins) are ignored; and pin-keeper circuits maintain I/O states. The device resumes normal operation within 1 µs after PD pin returns low.

Is JTAG boundary-scan supported on the ATF1508AS-10JC84?

Yes - the ATF1508AS-10JC84 fully supports IEEE Std. 1149.1-1990 and 1149.1a-1993 boundary-scan testing via its dedicated TDI, TDO, TMS, and TCK pins. BSDL models are available from Microchip's website, and all 96 I/O pins plus four dedicated inputs include boundary-scan cells for comprehensive interconnect testing.

Can the ATF1508AS-10JC84 be used as a direct replacement for older ATF1502AS or ATF1504AS devices?

Yes - the ATF1508AS-10JC84 is pin-compatible with ATF1502AS-10JC44 and ATF1504AS-10JC44 in the same PLCC package footprint, sharing identical JTAG, power, and control pin assignments. Its enhanced routing and 128-macrocell capacity allow backward-compatible upgrades without PCB modification, provided timing constraints are re-verified.

ATF1508AS-10JC84 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:: 10 ns

Voltage Supply - Internal:: 4.75V ~ 5.25V

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)

ATF1508AS-10JC84 FAQ

1.How can I place an order for ATF1508AS-10JC84 through Aetrix?

Please submit a Request for Quotation (RFQ) for ATF1508AS-10JC84 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-10JC84 reliable?

The price and inventory of ATF1508AS-10JC84 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508AS-10JC84 is usually 5 days.

3.What payment methods are accepted for ATF1508AS-10JC84?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508AS-10JC84 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ATF1508AS-10JC84?

ATF1508AS-10JC84 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ATF1508AS-10JC84 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-10JC84?

For technical support, including ATF1508AS-10JC84 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508AS-10JC84 requirements.

6.How does Aetrix verify that ATF1508AS-10JC84 is sourced from the original manufacturer or authorized distributors?

All ATF1508AS-10JC84 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-10JC84 meets industry standards.

7.What is the process for return or replacement of ATF1508AS-10JC84?

All ATF1508AS-10JC84 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508AS-10JC84, 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-10JC84 part is unused and in its original packaging.

Return procedure for ATF1508AS-10JC84:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…