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

Microchip Technology ATF1508ASVL-20AU100

Name: ATF1508ASVL-20AU100
Brand: Microchip Technology
SKU: ATF1508ASVL-20AU100
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ATF1508ASVL-20AU100

Manufacturer:: Microchip Technology

Category:: CPLDs (Complex Programmable Logic Devices)

Package:: 100-TQFP

Datasheet:: ATF1508ASVL-20AU100.pdf

Description:: IC CPLD 128MC 20NS 100TQFP

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Product details

Overview

ATF1508ASVL-20AU100 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 at 3.0–3.6 V, supports registered operation up to 77 MHz, and features JTAG-based in-system programmability (ISP) and IEEE 1149.1 boundary-scan testing. It is used in legacy industrial control logic consolidation and FPGA replacement for fixed-function glue logic.

For engineers reviewing the ATF1508ASVL-20AU100 datasheet, ATF1508ASVL-20AU100 pinout, ATF1508ASVL-20AU100 application, or ATF1508ASVL-20AU100 equivalent, key selection criteria include its 100-lead TQFP package, -20 speed grade (15 ns tPD1), L-version low-power standby (5 µA), PCI compliance, and JTAG ISP capability - all critical for reprogrammable control-plane logic in space-constrained embedded systems.

Technical Context

The ATF1508ASVL-20AU100 implements a hierarchical CPLD architecture with eight logic chains, each supporting up to 40-product-term sum-of-products logic via cascade paths. Its global bus delivers 100+ signals (I/Os + buried macrocell feedback) to switch matrices that allocate up to 40 inputs per logic block.

Each of its 128 macrocells integrates configurable D/T/latch flip-flops, XOR/OR/cascade logic, programmable slew rate, open-collector output option, and individual register control. The device supports three global clock pins (GCLK1–3), ITD circuits on clocks/inputs/I/Os, and fast registered input from product terms - enabling deterministic timing for synchronous state machines.

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 control logic.
Speed Grade	-20: 15 ns max pin-to-pin delay (tPD1), enabling 77 MHz registered operation - suitable for 20–25 MHz system clocks with timing margin.
Supply Voltage	3.0 V to 3.6 V - compatible with 3.3 V I/O standards and tolerant of nominal rail variation in industrial power supplies.
Standby Current	5 µA (L-version auto-standby) - enables ultra-low-power sleep modes in battery-backed or energy-sensitive applications.
Package	100-lead TQFP (14 × 14 mm, 0.5 mm pitch) - surface-mount compatible with standard reflow profiles and IPC-7351B land patterns.
JTAG Compliance	IEEE Std. 1149.1-1990/1149.1a-1993 - enables production boundary-scan test, in-circuit programming, and debug without dedicated test fixtures.
Program Cycles	10,000 erase/program cycles - supports field firmware updates and iterative design validation over extended product lifecycles.

Pinout & Package

ATF1508ASVL-20AU100 is housed in a 100-lead Thin Quad Flat Package (TQFP) with 0.5 mm lead pitch, JEDEC MO-137AC compliant, and RoHS-compliant (Pb/Halide-free) finish. Thermal pad is not present; thermal dissipation relies on PCB copper area under body.

Pin	Circuit Role	Design Meaning
1, 41	I/O/PD2	Power-down control input (active-high); when asserted, reduces ICC to <5 mA and latches all internal states - used for system-level sleep coordination.
4, 6, 15, 22, 62, 64, 73, 75, 85, 87, 89, 90, 91, 92, 137, 139, 140, 141, 142	Dedicated control I/O	Configurable as INPUT/GCLR, INPUT/OE1, INPUT/OE2/GCLK2, INPUT/GCLK1, I/O/GCLK3 - enables flexible clocking, reset, and output enable routing without consuming general-purpose logic resources.
9, 17, 64, 75	TDO, TMS, TCK, TDI	JTAG Test Access Port - provides boundary-scan test access and in-system programming; pull-up option available on TMS/TDI for robustness.
13, 20, 36, 41, 53, 68, 84, 93	VCCIO	I/O power supply pins - decoupling required per pin; allows mixed-voltage I/O interfacing when VCCIO = 3.3 V and core logic runs at same rail.
11, 26, 38, 43, 59, 74, 86, 95	GND	Ground reference pins - must be connected to solid ground plane; eight GND pins minimize ground bounce in high-speed switching.

Key Features

Feature	Design Value
Flexible macrocell configuration	D/T/latch flip-flop selection per macrocell, plus transparent-latch mode and combinatorial output with registered feedback - enables single-macrocell implementation of dual-edge-triggered or level-sensitive logic functions.
Enhanced routing resources	Global bus with 100+ signals + regional foldback bus (16 macrocells/region) - increases successful place-and-route yield for pin-locked revisions and reduces need for logic duplication.
Advanced power management	Auto 5 µA standby, pin-controlled power-down, per-macrocell reduced-power bit, and programmable pin-keeper - cuts dynamic and static power without external bias components.
Security and traceability	One-time programmable security fuse (blocks fuse pattern readback) + 16-bit user signature register - protects IP and enables revision tracking in production firmware images.
PCI compliance	Fully compliant with PCI Local Bus Specification Rev. 2.2 - permits direct integration into add-in cards and host-bridge logic without additional level-shifting or timing compensation.

Applications

Industrial PLC I/O Expansion	Legacy System Glue Logic Replacement
Use Scenario: Adding isolated digital input/output channels to a modular PLC backplane where space and thermal budget are constrained. IC Role / Device Role / Timing Role: CPLD acts as parallel I/O expander with programmable debounce, edge detection (via ITD), and register-controlled output enable - replacing discrete 74-series logic and microcontroller GPIO expansion. Use Value: Reduces BOM count by >12 components per module; eliminates external pull-ups via pin-keeper; supports in-field firmware update via JTAG ISP without board removal.	Use Scenario: Replacing obsolete PAL/GAL devices in avionics maintenance test equipment requiring long-term component availability. IC Role / Device Role / Timing Role: Configurable logic array implementing address decoding, bus arbitration, and handshake protocol translation between legacy 8-bit microcontrollers and modern peripherals. Use Value: Enables drop-in replacement using same 100-TQFP footprint; leverages -20 speed grade for 25 MHz bus timing; retains original pinout via fitter-assisted mapping.
PCI Add-in Card Control Logic	Automated Test Equipment (ATE) Pattern Generator
Use Scenario: Implementing PCI target interface logic on a custom measurement card requiring compliance with PCI electrical and protocol timing requirements. IC Role / Device Role / Timing Role: PCI-compliant bus controller handling address/data multiplexing, DEVSEL#, TRDY#, and parity generation - synchronized to 33 MHz PCI clock with deterministic setup/hold margins. Use Value: Eliminates need for external PCI interface ASIC; meets tSU/tH specs per AC table (-20 grade); uses dedicated GCLK pins for clean clock distribution.	Use Scenario: Generating precise stimulus waveforms and capture timing for semiconductor wafer probing, where jitter and repeatability are critical. IC Role / Device Role / Timing Role: High-speed pattern sequencer with 128 macrocells driving 96 I/Os - implements multi-phase clock dividers, state-machine-based vector sequencing, and glitch-free output enable control. Use Value: Achieves <15 ns pin-to-pin delay for sub-66 MHz pattern rates; uses fast input delay (tFIN = 2 ns) for external trigger synchronization; supports JTAG BST for production test coverage.

Industrial PLC I/O Expansion

Legacy System Glue Logic Replacement

Use Scenario: Adding isolated digital input/output channels to a modular PLC backplane where space and thermal budget are constrained.

IC Role / Device Role / Timing Role: CPLD acts as parallel I/O expander with programmable debounce, edge detection (via ITD), and register-controlled output enable - replacing discrete 74-series logic and microcontroller GPIO expansion.

Use Value: Reduces BOM count by >12 components per module; eliminates external pull-ups via pin-keeper; supports in-field firmware update via JTAG ISP without board removal.

Use Scenario: Replacing obsolete PAL/GAL devices in avionics maintenance test equipment requiring long-term component availability.

IC Role / Device Role / Timing Role: Configurable logic array implementing address decoding, bus arbitration, and handshake protocol translation between legacy 8-bit microcontrollers and modern peripherals.

Use Value: Enables drop-in replacement using same 100-TQFP footprint; leverages -20 speed grade for 25 MHz bus timing; retains original pinout via fitter-assisted mapping.

PCI Add-in Card Control Logic

Automated Test Equipment (ATE) Pattern Generator

Use Scenario: Implementing PCI target interface logic on a custom measurement card requiring compliance with PCI electrical and protocol timing requirements.

IC Role / Device Role / Timing Role: PCI-compliant bus controller handling address/data multiplexing, DEVSEL#, TRDY#, and parity generation - synchronized to 33 MHz PCI clock with deterministic setup/hold margins.

Use Value: Eliminates need for external PCI interface ASIC; meets tSU/tH specs per AC table (-20 grade); uses dedicated GCLK pins for clean clock distribution.

Use Scenario: Generating precise stimulus waveforms and capture timing for semiconductor wafer probing, where jitter and repeatability are critical.

IC Role / Device Role / Timing Role: High-speed pattern sequencer with 128 macrocells driving 96 I/Os - implements multi-phase clock dividers, state-machine-based vector sequencing, and glitch-free output enable control.

Use Value: Achieves <15 ns pin-to-pin delay for sub-66 MHz pattern rates; uses fast input delay (tFIN = 2 ns) for external trigger synchronization; supports JTAG BST for production test coverage.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ATF1508ASV-20AU100	No auto-standby; ICC1 standby = 115 mA (commercial) vs. 5 µA for ATF1508ASVL-20AU100; identical speed, pinout, and logic resources.	Suitable only where continuous power is guaranteed and standby current is non-critical - e.g., mains-powered instrumentation.	Select ATF1508ASVL-20AU100 when ultra-low-power sleep is required; choose ATF1508ASV-20AU100 only if legacy design compatibility mandates non-L version.
XC95144XL-10TQ100C	Xilinx CoolRunner-II CPLD; 144 macrocells, 10 ns tPD, 1.8 V core / 3.3 V I/O; no built-in PCI compliance or ITD circuits.	Better suited for new designs targeting lower static power and higher density; lacks native PCI timing support and requires external level shifters for 5 V-tolerant interfaces.	Prefer ATF1508ASVL-20AU100 for drop-in replacement of existing Atmel-based designs or PCI-compliant systems; choose XC95144XL only for greenfield designs prioritizing 1.8 V core efficiency.

Compared with ATF1508ASV-20AU100, the L-version reduces standby current by 4 orders of magnitude without sacrificing speed or logic capacity; versus XC95144XL-10TQ100C, it offers native PCI compliance and integrated ITD but trades off lower core voltage flexibility and newer process node advantages.

Availability

ATF1508ASVL-20AU100 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy system glue logic replacement, and PCI add-in card control logic requiring stable component supply across extended product lifecycles.

Supply support for ATF1508ASVL-20AU100 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(L) family, including datasheets, BSDL models, and legacy programming tools.

The ATF1508ASV(L) belongs to Atmel's high-performance EE PLD product line, designed specifically for reprogrammable, pin-compatible replacement of TTL, SSI/MSI logic and older PLDs in industrial, telecom, and test equipment.

FAQ

What is the difference between ATF1508ASVL-20AU100 and ATF1508ASV-20AU100?

The ATF1508ASVL-20AU100 includes automatic 5 µA standby mode activated when no logic transitions occur, while the non-L version draws 115 mA in standby. Both share identical logic resources, pinout, speed grade (-20), and package. The L-version is preferred for battery-backed or energy-sensitive applications where quiescent current matters. ATF1508ASVL-20AU100 remains fully compatible with ATF1508ASV-20AU100 designs except for power-supply filtering requirements.

Does ATF1508ASVL-20AU100 support in-system programming (ISP)?

Yes, ATF1508ASVL-20AU100 supports IEEE 1149.1-compliant JTAG ISP using TDI, TMS, TCK, and TDO pins. Programming can be performed without removing the device from the PCB, enabling field firmware updates and manufacturing flexibility. The JTAG interface also supports boundary-scan testing. ISP is enabled by default; disabling it frees four I/O pins but forfeits in-circuit reprogramming capability.

What are the valid operating voltage and temperature ranges for ATF1508ASVL-20AU100?

ATF1508ASVL-20AU100 operates from 3.0 V to 3.6 V on both VCCIO and VCCINT rails. It is rated for the industrial temperature range of –40°C to +85°C, making it suitable for harsh environments such as factory automation and outdoor infrastructure. The L-version's 5 µA standby current is specified across this full range, ensuring consistent low-power behavior in extreme conditions.

Can ATF1508ASVL-20AU100 replace older PAL/GAL devices in legacy designs?

Yes, ATF1508ASVL-20AU100 is widely used to replace obsolete PAL16L8, GAL16V8, and GAL22V10 devices. Its 128 macrocells, flexible pin assignment, and fitter software support direct mapping of ABEL or CUPL source files. The 100-TQFP package matches common footprint standards, and the -20 speed grade ensures timing compliance with original designs running at ≤25 MHz system clocks.

How does the programmable pin-keeper feature work on ATF1508ASVL-20AU100?

The pin-keeper feature on ATF1508ASVL-20AU100 holds unused input or I/O pins at their last driven logic level (high or low) using internal weak keeper circuits. This prevents floating inputs that cause shoot-through current and EMI. Enabled per-pin in the design file, it eliminates external pull-up/down resistors and associated DC power loss - especially valuable in high-pin-count, low-power industrial modules where board space and thermal budget are constrained.

ATF1508ASVL-20AU100 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: ATF15xx

Package/Case:: 100-TQFP

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Programmable Type:: In System Programmable (min 10K program/erase cycles)

Delay Time tpd(1) Max:: 20 ns

Voltage Supply - Internal:: 3V ~ 3.6V

Number of Logic Elements/Blocks:: -

Number of Macrocells:: 128

Number of Gates:: -

Number of I/O:: 80

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 100-TQFP (14x14)

ATF1508ASVL-20AU100 FAQ

1.How can I place an order for ATF1508ASVL-20AU100 through Aetrix?

Please submit a Request for Quotation (RFQ) for ATF1508ASVL-20AU100 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 ATF1508ASVL-20AU100 reliable?

The price and inventory of ATF1508ASVL-20AU100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508ASVL-20AU100 is usually 5 days.

3.What payment methods are accepted for ATF1508ASVL-20AU100?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508ASVL-20AU100 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ATF1508ASVL-20AU100?

ATF1508ASVL-20AU100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ATF1508ASVL-20AU100 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 ATF1508ASVL-20AU100?

For technical support, including ATF1508ASVL-20AU100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508ASVL-20AU100 requirements.

6.How does Aetrix verify that ATF1508ASVL-20AU100 is sourced from the original manufacturer or authorized distributors?

All ATF1508ASVL-20AU100 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 ATF1508ASVL-20AU100 meets industry standards.

7.What is the process for return or replacement of ATF1508ASVL-20AU100?

All ATF1508ASVL-20AU100 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508ASVL-20AU100, 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 ATF1508ASVL-20AU100 part is unused and in its original packaging.

Return procedure for ATF1508ASVL-20AU100:

1.Submit a request within 90 days.

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

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