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

Microchip Technology ATF20V8B-10PI

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

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Part No.:: ATF20V8B-10PI

Manufacturer:: Microchip Technology

Category:: PLDs (Programmable Logic Device)

Package:: 24-DIP (0.300", 7.62mm)

Datasheet:: ATF20V8B-10PI.pdf

Description:: IC PLD 8MC 10NS 24DIP

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Product details

Overview

ATF20V8B-10PI from Atmel is a high-performance, electrically-erasable CMOS programmable logic device (PLD) with 7.5 ns to 10 ns pin-to-pin delay, 8 macrocells, 24-pin DIP/SOIC/TSSOP/PLCC package options, and industrial temperature range (-40°C to +85°C). It functions as a reprogrammable PAL emulator in digital control, glue logic, and state machine applications.

For engineers reviewing the ATF20V8B-10PI datasheet, ATF20V8B-10PI pinout, ATF20V8B-10PI application, or ATF20V8B-10PI equivalent, key selection criteria include registered vs. combinatorial mode support, OE-controlled output timing (tPZX = 2–10 ns), power supply current (ICC = 60–100 mA standby), and Flash-based reprogrammability without UV erasure.

Technical Context

The ATF20V8B-10PI implements a universal 8-macrocell architecture supporting three automatic configuration modes: Registered (emulating 20R8/20RP8), Complex (emulating 20L8/20H8), and Simple (emulating 14L8/16L6). Each macrocell allocates up to eight product terms for sum-of-products logic synthesis.

It uses Atmel's Flash memory technology for nonvolatile storage, enabling 100 erase/write cycles and 20-year data retention. Input and I/O pins feature internal pull-up resistors, TTL/CMOS-compatible thresholds (VIL = 0.8 V, VIH = 2.0 V), and 2,000 V ESD protection - all specified across full 5 V ±10% supply and industrial temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
Propagation Delay (tPD)	10 ns max - guarantees synchronous logic path timing for 68 MHz external feedback operation
Power Supply Current (ICC, Standby)	60–100 mA - defines minimum system quiescent power draw at VCC = 5 V ±10%
Input Voltage Thresholds	VIL ≤ 0.8 V, VIH ≥ 2.0 V - ensures reliable interfacing with TTL and CMOS logic families
Operating Temperature	-40°C to +85°C - validated for industrial-grade embedded control and automation environments
Package Type	24P3 (PDIP) - 24-lead, 0.300" wide plastic dual in-line package with standard 0.1" pin pitch
Logic Density	8 macrocells × 8 product terms - supports medium-complexity combinational and registered logic functions
Security Fuse	Single-programmable fuse - prevents unauthorized JEDEC file readback while preserving 64-bit user signature access

Pinout & Package

ATF20V8B-10PI is supplied in 24-lead PDIP (package code 24P3), a through-hole dual in-line package with 0.300" body width and standard 0.1" pin spacing. Pin 1 is marked by a notch or dot; top view orientation follows JEDEC MS-001 AF.

Pin	Circuit Role	Design Meaning
1	CLK/IN	Active-high clock input in registered mode; general-purpose input in combinatorial modes
2–11	I	Dedicated logic inputs (10 total); internally pulled up when floating
12	GND	Ground reference for all logic and power domains
13	VCC	+5 V ±10% supply input; decoupling required per design guidelines
14–21	I/O	Bidirectional macrocell I/Os (8 total); configurable as input, combinatorial output, or registered output
22	OE/IN	Output enable control (active-low); doubles as general input when not used for OE
23–24	I	Additional dedicated inputs (2 total); same electrical behavior as Pins 2–11

Key Features

Feature	Design Value
Flash-based reprogrammability	Enables in-system logic updates without UV eraser or socket removal; supports 100 write cycles
Three auto-configured logic modes	Eliminates manual architecture selection: Registered, Complex, and Simple modes map directly to legacy PAL families
Internal input/I/O pull-up resistors	Prevents floating inputs during reset or un-driven states; eliminates need for external pull-ups in most designs
PCI-compliant signaling	Meets PCI Local Bus Specification voltage and timing requirements for add-in card interface logic
User-accessible 64-bit signature	Stores project ID, revision, or date in nonvolatile memory - readable even after security fuse programming

Applications

Industrial Control Logic	Legacy System Replacement
Use Scenario: Replacing obsolete 20R8 PALs in motor drive sequencers and PLC I/O modules. IC Role / Device Role / Timing Role: Glue logic controller implementing state machines and address decoding with deterministic 10 ns propagation delay. Use Value: Enables drop-in replacement of aging PAL devices using standard ABEL/CUPL toolchains and existing JEDEC files.	Use Scenario: Modernizing vintage test equipment requiring 24-pin PLD upgrades without board redesign. IC Role / Device Role / Timing Role: Emulation engine for 14L8, 16L6, and 20L8 PAL architectures via software-selected Simple/Complex modes. Use Value: Preserves original PCB layout and firmware while adding field-upgradable logic functionality via Flash reprogramming.
Embedded Power Sequencing	Communications Interface Logic
Use Scenario: Coordinating multi-rail power-up sequencing in telecom line cards with precise timing margins. IC Role / Device Role / Timing Role: Registered-mode timing controller using CLK-synchronized outputs and power-up reset guaranteeing known initial state. Use Value: Eliminates external RC reset networks; tPR = 600–1000 ns ensures deterministic register initialization before first clock edge.	Use Scenario: Implementing protocol translation and handshaking logic between UART, SPI, and parallel bus peripherals. IC Role / Device Role / Timing Role: Combinatorial I/O expander with OE-controlled outputs (tPZX = 2–10 ns) for dynamic bus arbitration. Use Value: Supports real-time signal conditioning and level-shifting without microcontroller intervention or additional buffers.

Industrial Control Logic

Legacy System Replacement

Use Scenario: Replacing obsolete 20R8 PALs in motor drive sequencers and PLC I/O modules.

IC Role / Device Role / Timing Role: Glue logic controller implementing state machines and address decoding with deterministic 10 ns propagation delay.

Use Value: Enables drop-in replacement of aging PAL devices using standard ABEL/CUPL toolchains and existing JEDEC files.

Use Scenario: Modernizing vintage test equipment requiring 24-pin PLD upgrades without board redesign.

IC Role / Device Role / Timing Role: Emulation engine for 14L8, 16L6, and 20L8 PAL architectures via software-selected Simple/Complex modes.

Use Value: Preserves original PCB layout and firmware while adding field-upgradable logic functionality via Flash reprogramming.

Embedded Power Sequencing

Communications Interface Logic

Use Scenario: Coordinating multi-rail power-up sequencing in telecom line cards with precise timing margins.

IC Role / Device Role / Timing Role: Registered-mode timing controller using CLK-synchronized outputs and power-up reset guaranteeing known initial state.

Use Value: Eliminates external RC reset networks; tPR = 600–1000 ns ensures deterministic register initialization before first clock edge.

Use Scenario: Implementing protocol translation and handshaking logic between UART, SPI, and parallel bus peripherals.

IC Role / Device Role / Timing Role: Combinatorial I/O expander with OE-controlled outputs (tPZX = 2–10 ns) for dynamic bus arbitration.

Use Value: Supports real-time signal conditioning and level-shifting without microcontroller intervention or additional buffers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
GAL20V8-10LP	Erasable EPROM-based (UV-erasable), not Flash; requires UV eraser; no internal pull-ups	Limited to lab/prototype use due to non-reprogrammable-in-system nature; lacks power-up reset	Select only if legacy GAL toolchain compatibility is mandatory and field updates are unnecessary
ATF20V8B-10PC	Same architecture and timing, but commercial temperature range (0°C to +70°C) and PDIP packaging	Suitable for non-industrial environments; lower cost but not rated for extended thermal cycling	Choose for cost-sensitive consumer or lab applications where ambient temperature remains within 0–70°C

Compared with GAL20V8-10LP and ATF20V8B-10PC, the ATF20V8B-10PI uniquely combines industrial temperature rating, Flash reprogrammability, internal pull-ups, and power-up reset - making it the only option qualified for long-life, field-upgradable industrial control deployments.

Availability

ATF20V8B-10PI is available at Aetrix Electronics and suitable for industrial control logic, legacy system replacement, embedded power sequencing, and communications interface logic requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ATF20V8B-10PI 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 solutions for industrial, automotive, and consumer markets.

The ATF20V8B product line was designed to deliver Flash-based, pin-compatible replacements for legacy 24-pin PAL devices - enabling seamless migration from EPROM- and fuse-based PLDs to reprogrammable, in-system configurable logic.

FAQ

What is the maximum operating frequency supported by ATF20V8B-10PI?

The ATF20V8B-10PI supports up to 68 MHz under external feedback conditions (1/(tS + tCO)), 74 MHz under internal feedback, and 83 MHz in no-feedback configurations. These values derive directly from its 10 ns tPD, 7.5 ns tS, and 7 ns tCO specifications at VCC = 5 V ±10% and -40°C to +85°C - confirmed in the AC Characteristics table on page 4 of the official datasheet.

Does ATF20V8B-10PI require external pull-up resistors on input pins?

No, ATF20V8B-10PI includes internal input and I/O pull-up resistors, ensuring all un-driven pins float to VCC and maintain defined logic states. This eliminates the need for external pull-ups in most applications - a feature explicitly documented in the "Input and I/O Pull-ups" section (page 6) and verified across all package variants including the 24P3 PDIP used for ATF20V8B-10PI.

Can ATF20V8B-10PI emulate a 20R8 PAL device?

Yes, ATF20V8B-10PI natively emulates the 20R8 PAL in Registered Mode, allocating eight product terms per macrocell and supporting clocked outputs with OE control. This capability is confirmed in the "Registered Mode" section (page 7), which lists 20R8 among supported emulated devices and specifies identical pinout and functional behavior when configured via ABEL or CUPL compilers.

What is the power-up reset behavior of ATF20V8B-10PI?

ATF20V8B-10PI performs an asynchronous power-up reset that forces all registers to low at VRST = 3.8–4.5 V, resulting in high registered outputs on power-up. This behavior is guaranteed across the full industrial temperature range and is critical for state machine initialization - detailed in the "Power-up Reset" section (page 5) with tPR = 600–1000 ns timing specification.

Is ATF20V8B-10PI RoHS compliant?

Yes, ATF20V8B-10PI is offered in green package options compliant with Pb/Halide-free and RoHS requirements. The datasheet explicitly states "Green Package Options (Pb/Halide-free/RoHS Compliant)" for the -10PI variant in the Ordering Information table (page 15), confirming compliance for the 24P3 PDIP package used in this part number.

ATF20V8B-10PI Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: 20V8

Package/Case:: 24-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Programmable Type:: EE PLD

Number of Macrocells:: 8

Voltage - Input:: 5V

Speed:: 10 ns

Mounting Type:: Through Hole

Supplier Device Package:: 24-PDIP

ATF20V8B-10PI FAQ

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

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

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

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your ATF20V8B-10PI 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-10PI?

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

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

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

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

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

Return procedure for ATF20V8B-10PI:

1.Submit a request within 90 days.

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

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