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Home > Products > Integrated Circuits (ICs) > Embedded > PLDs (Programmable Logic Device)

Microchip Technology ATF20V8B-10SI

Name: ATF20V8B-10SI
Brand: Microchip Technology
SKU: ATF20V8B-10SI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ATF20V8B-10SI

Manufacturer:: Microchip Technology

Category:: PLDs (Programmable Logic Device)

Package:: 24-SOIC (0.295", 7.50mm Width)

Datasheet:: ATF20V8B-10SI.pdf

Description:: IC PLD 8MC 10NS 24SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ATF20V8B-10SI from Atmel is a high-performance, electrically-erasable programmable logic device (PLD) in 24-pin SOIC package, delivering 10 ns maximum pin-to-pin delay, 7.5 ns minimum propagation delay, and industrial temperature operation (-40°C to +85°C). It supports registered, complex, and simple PAL emulation modes with eight macrocells, each configurable as input, combinatorial I/O, or registered output - used in legacy system upgrades, glue logic replacement, and FPGA companion control logic.

For engineers reviewing the ATF20V8B-10SI datasheet, ATF20V8B-10SI pinout, ATF20V8B-10SI application, or ATF20V8B-10SI equivalent, key selection criteria include its Flash-based reprogrammability, 20-year data retention, 100 erase/write cycles, PCI compliance, and support for 5V ±10% supply across industrial conditions - critical for long-lifecycle industrial control and telecom infrastructure designs.

Technical Context

The ATF20V8B-10SI implements a universal architecture with eight macrocells, each allocated eight product terms in registered mode or seven plus one OE term in complex mode. Its Flash memory enables in-system reprogramming without UV erasure, and internal pull-up resistors ensure defined logic states on un-driven inputs/I/Os.

It operates in three software-configurable modes: Registered (emulates 20R8/20RP8), Complex (emulates 20L8/20H8), and Simple (emulates 14L8/16L6/18L4). Power-up reset guarantees registered outputs initialize to high state, supporting deterministic state machine startup under monotonic VCC ramp conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Max Pin-to-pin Delay	10 ns - ensures timing closure in 68 MHz external feedback systems
Supply Voltage Range	5V ±10% - supports stable operation across industrial power rails
Operating Temperature	-40°C to +85°C - qualified for extended-temperature embedded control
Data Retention	20 years - guarantees configuration persistence in unpowered storage
Erase/Write Cycles	100 - enables field firmware updates and design iteration
ESD Protection	2,000V HBM - reduces handling sensitivity during board assembly
Latchup Immunity	200 mA - prevents destructive latchup under transient overvoltage

Pinout & Package

ATF20V8B-10SI is packaged in a 24-lead, 0.300" wide plastic gull-wing small outline (SOIC) per JEDEC MS-012, with 1.27 mm pitch and standard 24-pin DIP-compatible footprint.

Pin/Terminal	Circuit Role	Design Meaning
1, 11, 13–18, 20–23	Input / I/O	Configurable as logic input, combinatorial output, or registered I/O with feedback path
2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 19, 24	Input	Dedicated input pins feeding AND array; pins 12 and 19 are output-only in Complex Mode
CLK/IN (Pin 1)	Clock Input / General Input	Global clock for registered outputs; functions as general input when not used as clock
OE/IN (Pin 24)	Output Enable / General Input	Controls tristate of all I/Os; serves as input when OE function disabled
VCC (Pin 13)	Power Supply	+5V supply pin; decoupling required within 1 cm for noise immunity
GND (Pin 12)	Ground Reference	Primary ground return; must be low-inductance connection to minimize switching noise

Key Features

Feature	Design Value
Flash-based reprogrammability	Enables in-circuit logic updates without socket removal or UV erasers
Three automatic configuration modes	Eliminates manual architecture selection - compiler auto-selects Registered/Complex/Simple based on logic usage
Internal input/I/O pull-up resistors	Prevents floating inputs without external components, reducing BOM count and layout area
Power-up reset with guaranteed high output	Ensures known initial state for synchronous logic, simplifying boot sequence design
64-bit user-accessible signature memory	Stores revision ID, project name, or calibration data - readable even with security fuse programmed

Applications

Industrial PLC Backplane Glue Logic	Legacy Telecom Line Card Replacement
Use Scenario: Replacing obsolete PALs in programmable logic controllers where space and thermal constraints limit FPGA adoption. IC Role / Device Role / Timing Role: Configurable combinatorial and registered logic block implementing address decoding, bus arbitration, and status multiplexing. Use Value: 10 ns timing margin meets cycle time requirements for 8-bit microcontroller buses running at ≤10 MHz with no PCB redesign needed.	Use Scenario: Upgrading aging T1/E1 line interface cards requiring pin-compatible PAL replacements with longer lifecycle support. IC Role / Device Role / Timing Role: Emulating GAL20V8_R in registered mode to manage framing sync, alarm masking, and channel mapping logic. Use Value: 20-year data retention and 100 erase cycles enable field reconfiguration for protocol updates without hardware change.
Automated Test Equipment (ATE) Pattern Generator	Medical Imaging Control Sequencer
Use Scenario: Generating precise stimulus patterns for digital IC functional testing where deterministic startup and repeatability are mandatory. IC Role / Device Role / Timing Role: Synchronous state machine controlling test vector sequencing, clock gating, and pass/fail flag generation. Use Value: Power-up reset guaranteeing high output eliminates need for external reset circuitry, reducing test head component count.	Use Scenario: Managing timing-critical sequencing of X-ray detector readout, ADC sampling, and buffer handshaking in portable imaging devices. IC Role / Device Role / Timing Role: Registered-mode PLD synchronizing sensor trigger, analog front-end enable, and DMA request signals. Use Value: 2,000V HBM ESD rating protects against operator-induced discharge during clinical equipment servicing.

Industrial PLC Backplane Glue Logic

Legacy Telecom Line Card Replacement

Use Scenario: Replacing obsolete PALs in programmable logic controllers where space and thermal constraints limit FPGA adoption.

IC Role / Device Role / Timing Role: Configurable combinatorial and registered logic block implementing address decoding, bus arbitration, and status multiplexing.

Use Value: 10 ns timing margin meets cycle time requirements for 8-bit microcontroller buses running at ≤10 MHz with no PCB redesign needed.

Use Scenario: Upgrading aging T1/E1 line interface cards requiring pin-compatible PAL replacements with longer lifecycle support.

IC Role / Device Role / Timing Role: Emulating GAL20V8_R in registered mode to manage framing sync, alarm masking, and channel mapping logic.

Use Value: 20-year data retention and 100 erase cycles enable field reconfiguration for protocol updates without hardware change.

Automated Test Equipment (ATE) Pattern Generator

Medical Imaging Control Sequencer

Use Scenario: Generating precise stimulus patterns for digital IC functional testing where deterministic startup and repeatability are mandatory.

IC Role / Device Role / Timing Role: Synchronous state machine controlling test vector sequencing, clock gating, and pass/fail flag generation.

Use Value: Power-up reset guaranteeing high output eliminates need for external reset circuitry, reducing test head component count.

Use Scenario: Managing timing-critical sequencing of X-ray detector readout, ADC sampling, and buffer handshaking in portable imaging devices.

IC Role / Device Role / Timing Role: Registered-mode PLD synchronizing sensor trigger, analog front-end enable, and DMA request signals.

Use Value: 2,000V HBM ESD rating protects against operator-induced discharge during clinical equipment servicing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable logic device applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ATF20V8B-10PI	Same speed grade and architecture, but in PDIP package (24P3) instead of SOIC (24S)	Preferred for through-hole prototyping or legacy board rework where SOIC footprint unavailable	Select when mechanical compatibility with existing DIP sockets or wave-solder processes is required
ATF20V8BQ-10JI	Lower standby current (35 mA vs. 60 mA) and active current (40 mA vs. 80 mA), same 10 ns speed and industrial temp range	Better suited for battery-backed or thermally constrained systems where power efficiency is prioritized over raw density	Choose when system-level power budget limits total PLD quiescent draw to <40 mA

Compared with ATF20V8B-10PI, the ATF20V8B-10SI offers superior board-space efficiency and reflow compatibility; compared with ATF20V8BQ-10JI, it trades higher active power for broader legacy toolchain support and wider availability in industrial-grade SOIC.

Availability

ATF20V8B-10SI is available at Aetrix Electronics and suitable for industrial control systems, telecom infrastructure upgrades, and medical device logic consolidation requiring stable component supply across extended product lifecycles.

Supply support for ATF20V8B-10SI 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

Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and programmable logic devices for industrial, automotive, and consumer applications.

The ATF20V8B product line was designed to provide Flash-based, reprogrammable alternatives to one-time-programmable PALs and GALs - targeting legacy system modernization and long-lifecycle industrial logic replacement.

FAQ

What is the maximum operating frequency supported by ATF20V8B-10SI in registered mode?

The ATF20V8B-10SI supports up to 68 MHz in external feedback configuration (1/(tS + tCO)), 74 MHz in internal feedback (1/(tS + tCF)), and 83 MHz in no-feedback mode (1/tP), all verified at industrial temperature and 5V ±10%. These frequencies reflect worst-case timing across the full operating range and are directly usable in clock domain planning for the ATF20V8B-10SI without derating.

Does ATF20V8B-10SI require external pull-up resistors on input or I/O pins?

No, the ATF20V8B-10SI includes internal weak pull-up resistors on all inputs and I/Os, ensuring defined logic-high states when pins are left un-driven. This eliminates the need for external pull-ups in most applications, reducing bill-of-materials cost and PCB real estate - a confirmed feature documented in the "Input and I/O Pull-ups" section of the ATF20V8B-10SI datasheet.

Can ATF20V8B-10SI be programmed using standard PLD programmers?

Yes, the ATF20V8B-10SI is compatible with industry-standard PLD programmers that support Atmel's Flash programming algorithm, including Data I/O PS-200, BP Microsystems Model 2000, and Xeltek SuperPRO series. Programming voltage is 12.5V applied to VCC during programming, and JEDEC files generated by ABEL, CUPL, or OrCAD-PLD tools are fully supported for the ATF20V8B-10SI.

Is ATF20V8B-10SI RoHS compliant?

Yes, the ATF20V8B-10SI is offered in green package options compliant with RoHS Directive 2011/65/EU (Pb/Halide-free), as confirmed in the "ATF20V8B Green Package Options" section of the official datasheet. The SOIC (24S) variant carries the -10SI suffix and meets all substance restrictions without exemption claims.

What happens to registered outputs on power-up in ATF20V8B-10SI?

On power-up, the ATF20V8B-10SI performs an asynchronous reset that forces all registered outputs to the high state after VCC crosses VRST (3.8–4.5 V), provided the supply ramp is monotonic and setup times are met before first clock edge. This behavior is guaranteed across the full industrial temperature range and is a core architectural feature of the ATF20V8B-10SI, enabling reliable state machine initialization without external reset circuitry.

ATF20V8B-10SI Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: 20V8

Package/Case:: 24-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Programmable Type:: EE PLD

Number of Macrocells:: 8

Voltage - Input:: 5V

Speed:: 10 ns

Mounting Type:: Surface Mount

Supplier Device Package:: 24-SOIC

ATF20V8B-10SI FAQ

1.How can I place an order for ATF20V8B-10SI through Aetrix?

Please submit a Request for Quotation (RFQ) for ATF20V8B-10SI 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 ATF20V8B-10SI reliable?

The price and inventory of ATF20V8B-10SI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF20V8B-10SI is usually 5 days.

3.What payment methods are accepted for ATF20V8B-10SI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF20V8B-10SI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ATF20V8B-10SI?

ATF20V8B-10SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ATF20V8B-10SI 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 ATF20V8B-10SI?

For technical support, including ATF20V8B-10SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF20V8B-10SI requirements.

6.How does Aetrix verify that ATF20V8B-10SI is sourced from the original manufacturer or authorized distributors?

All ATF20V8B-10SI 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 ATF20V8B-10SI meets industry standards.

7.What is the process for return or replacement of ATF20V8B-10SI?

All ATF20V8B-10SI units undergo pre-shipment inspection (PSI). If there is an issue with ATF20V8B-10SI, 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 ATF20V8B-10SI part is unused and in its original packaging.

Return procedure for ATF20V8B-10SI:

1.Submit a request within 90 days.

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

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