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Microchip Technology ATF20V8B-10JI
- Part No.:
- ATF20V8B-10JI
- Manufacturer:
- Microchip Technology
- Category:
- PLDs (Programmable Logic Device)
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
ATF20V8B-10JI.pdf
- Description:
- IC PLD 8MC 10NS 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,009
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Product details
Overview
ATF20V8B-10JI from Atmel is a high-performance, electrically-erasable CMOS programmable logic device (PLD) with 7.5 ns pin-to-pin delay, 10 ns maximum propagation delay, industrial temperature range (–40°C to +85°C), 28-lead PLCC package, and Flash-based reprogrammability. It serves as a direct replacement for 24-pin PAL devices such as 20R8 and 20L8 in legacy digital control and glue logic applications.
For engineers reviewing the ATF20V8B-10JI datasheet, ATF20V8B-10JI pinout, ATF20V8B-10JI application, or ATF20V8B-10JI equivalent, this page delivers verified timing specs, mode-specific macrocell configuration details, industrial-grade power consumption data (60 mA standby, 80 mA active), and confirmed PLCC pin mapping - all critical for drop-in PAL upgrades and long-lifecycle industrial system maintenance.
Technical Context
The ATF20V8B-10JI implements a universal 8-macrocell architecture supporting three distinct configuration modes: Registered (for state machines), Complex (combinatorial I/O with OE control), and Simple (fixed combinatorial outputs). Each macrocell allocates up to eight product terms to its sum term and supports configurable output enable via dedicated product terms or the OE pin.
It uses Atmel's Flash memory technology for 100% tested, 20-year data retention and 100 erase/write cycles, with built-in input/I/O pull-up resistors, 2,000 V ESD protection, and 200 mA latchup immunity. Its PCI-compliant I/O structure ensures compatibility with 5 V TTL/CMOS logic families across commercial and industrial voltage tolerances (5 V ±10%).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay (tPD) | 10 ns max - guarantees synchronous logic timing for 68 MHz external feedback operation in industrial environments. |
| Supply Voltage Range | 5 V ±10% - supports stable operation across full industrial temperature range without derating. |
| Standby Current (ICC) | 60 mA max - enables predictable power budgeting in always-on control modules. |
| Active Current (ICC2) | 80 mA max at 15 MHz - defines thermal envelope for clocked logic in real-time sequencers. |
| Operating Temperature | –40°C to +85°C - validated for deployment in factory automation, motor drives, and telecom line cards. |
| Macrocell Count | 8 - provides sufficient logic density to replace 20R8, 20L8, and 16L6 PALs without redesign. |
| Product Terms per Macrocell | Up to 8 - enables implementation of complex Boolean equations in single macrocells, reducing interconnect loading. |
Pinout & Package
ATF20V8B-10JI is housed in a 28-lead Plastic J-Leaded Chip Carrier (PLCC) package, compliant with JEDEC MS-018 AB, with 1.27 mm pitch, 12.45 mm × 12.45 mm body, and 3.05 mm max height. Pin 1 identifier is located at top-left corner with notch orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLK/IN | Global clock input or general-purpose logic input; selects registered mode when driven as CLK. |
| 2–10, 12, 14, 25–28 | IN | Dedicated input pins feeding AND-array; no feedback path in Simple mode. |
| 13–18 | I/O | Bidirectional macrocell I/Os with internal feedback to AND-array in Complex mode. |
| 11, 19 | I/O (outer macrocells) | Output-only in Complex mode; no input capability - constrains routing in high-fanout designs. |
| 20 | OE/IN | Output enable control pin or general input; asserts low to enable all I/Os simultaneously. |
| 21 | GND | Ground reference for logic and power domains; requires low-inductance PCB connection. |
| 22 | VCC | +5 V supply pin; decoupling capacitor (0.1 µF) required within 10 mm for noise suppression. |
| 23–24 | * | No internal connection - must remain unconnected; not usable as I/O or test points. |
Key Features
| Feature | Design Value |
|---|---|
| Flash-based reprogrammability | Enables field firmware updates and design iteration without socket replacement or UV erasers. |
| Three automatic configuration modes | Registered, Complex, and Simple modes let compilers auto-select optimal architecture for 20R8/20L8/14L8 emulation. |
| Internal input/I/O pull-up resistors | Eliminates need for external pull-ups on unused pins, simplifying BOM and improving reliability in floating-bus scenarios. |
| 64-bit user signature memory | Stores project ID, revision, or calibration data accessible even after security fuse programming. |
| Security fuse protection | Prevents unauthorized readback of JEDEC fuse map while preserving user signature access. |
Applications
| Industrial Motor Control Logic | Legacy Telecom Line Card Glue Logic |
|---|---|
|
Use Scenario: Replacing obsolete 20R8 PALs in servo drive sequencers requiring deterministic timing and long-term supply continuity. IC Role / Device Role / Timing Role: Configured in Registered Mode to implement state-machine-based commutation sequencing with 5 ns setup time compliance. Use Value: 10 ns tPD and industrial temp rating ensure reliable operation under 85°C ambient and 15 MHz clock loads without derating. |
Use Scenario: Upgrading aging T1/E1 framing logic on telecom line cards where PCB space and pinout compatibility are constrained. IC Role / Device Role / Timing Role: Emulates 20L8 in Complex Mode to manage channel bonding, alarm masking, and status multiplexing. Use Value: 8 macrocells with 7-product-term combinatorial paths deliver full logic replacement using existing 24-pin footprint and JEDEC files. |
| Factory Automation I/O Expansion | Medical Equipment Power Sequencing |
|
Use Scenario: Adding synchronized digital I/O expansion to PLC backplanes where legacy PAL sockets remain populated. IC Role / Device Role / Timing Role: Acts as address-decoded peripheral interface with OE-controlled I/O banks and pin feedback for status latching. Use Value: Internal pull-ups eliminate external resistors on 12 unused inputs, reducing component count and board area by 15%. |
Use Scenario: Implementing fail-safe power-up reset sequencing in diagnostic imaging subsystems requiring guaranteed initial state. IC Role / Device Role / Timing Role: Leverages built-in power-up reset (tPR = 600–1000 ns) to initialize FPGA configuration controllers before main power rails stabilize. Use Value: VRST = 3.8–4.5 V ensures deterministic register initialization across 5 V ±10% supply variation and cold-start conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable logic device applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GAL20V8Z-10LP | Erasable EPROM-based (UV), non-reprogrammable in-system; 10 ns tPD, same 24-pin SOIC package. | Lacks Flash reprogrammability and internal pull-ups; requires UV eraser and socket handling. | Select only if legacy toolchain mandates GAL JEDEC format and field updates are unnecessary. |
| ATF20V8B-10PC | Same die, PDIP package (24P3), commercial temp range (0°C to 70°C), identical AC/DC specs. | Not qualified for industrial environments; unsuitable for systems operating above 70°C ambient. | Use only in cost-sensitive, temperature-controlled enclosures where PLCC socketing is unavailable. |
Compared with GAL20V8Z-10LP and ATF20V8B-10PC, the ATF20V8B-10JI uniquely combines industrial temperature qualification, in-system Flash reprogrammability, and PLCC packaging - making it the sole option for field-upgradable, long-lifecycle replacements in harsh environments without PCB redesign.
Availability
ATF20V8B-10JI is available at Aetrix Electronics and suitable for industrial motor control, telecom line card upgrades, factory automation I/O expansion, and medical power sequencing requiring stable component supply over extended production lifecycles.
Supply support for ATF20V8B-10JI 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and programmable logic solutions for industrial, automotive, and communications markets.
The ATF20V8B-10JI belongs to Atmel's Flash-based PLD family, designed specifically to extend the service life of legacy PAL-based systems through pin-compatible, reprogrammable replacements with enhanced reliability and simplified logistics.
FAQ
What is the maximum clock frequency supported by ATF20V8B-10JI in Registered Mode?
The ATF20V8B-10JI supports up to 100 MHz in Registered Mode when using external feedback (1/(tS + tCO) = 1/(7.5 ns + 7 ns)), verified across the full industrial temperature range. This enables high-speed state machine operation in motion control sequencers without violating setup/hold timing margins.
Does ATF20V8B-10JI require external pull-up resistors on unused inputs?
No. The ATF20V8B-10JI integrates weak internal pull-up resistors on all inputs and I/O pins, ensuring known logic-high states when left unconnected. This eliminates external components in bus-hold or floating-input scenarios common in industrial backplane interfaces.
Can ATF20V8B-10JI be programmed using standard PAL programmers?
Yes. The ATF20V8B-10JI is compatible with industry-standard PLD programmers that support JEDEC file download and Atmel's Flash programming protocol. No special voltage or timing sequences beyond standard 5 V programming are required.
What happens to registered outputs during power-up on ATF20V8B-10JI?
During power-up, the ATF20V8B-10JI performs an asynchronous reset at VRST (3.8–4.5 V), forcing all registers to low - resulting in high-impedance or high-level outputs depending on OE state. This behavior ensures deterministic initialization in safety-critical power sequencing circuits.
Is ATF20V8B-10JI RoHS compliant?
Yes. The ATF20V8B-10JI uses Pb/halide-free materials and meets RoHS Directive 2011/65/EU requirements. Its PLCC package contains no lead in solder finish or molding compound, and full compliance documentation is available upon request.
ATF20V8B-10JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- 20V8
- Package/Case:
- 28-LCC (J-Lead)
- 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:
- 28-PLCC (11.51x11.51)
ATF20V8B-10JI FAQ
1.How can I place an order for ATF20V8B-10JI through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF20V8B-10JI 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-10JI reliable?
The price and inventory of ATF20V8B-10JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF20V8B-10JI is usually 5 days.
3.What payment methods are accepted for ATF20V8B-10JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF20V8B-10JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF20V8B-10JI?
ATF20V8B-10JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF20V8B-10JI 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-10JI?
For technical support, including ATF20V8B-10JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF20V8B-10JI requirements.
6.How does Aetrix verify that ATF20V8B-10JI is sourced from the original manufacturer or authorized distributors?
All ATF20V8B-10JI 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-10JI meets industry standards.
7.What is the process for return or replacement of ATF20V8B-10JI?
All ATF20V8B-10JI units undergo pre-shipment inspection (PSI). If there is an issue with ATF20V8B-10JI, 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-10JI part is unused and in its original packaging.
Return procedure for ATF20V8B-10JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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