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Microchip Technology ATF20V8B-10SC
- Part No.:
- ATF20V8B-10SC
- Manufacturer:
- Microchip Technology
- Category:
- PLDs (Programmable Logic Device)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ATF20V8B-10SC.pdf
- Description:
- IC PLD 8MC 10NS 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,180
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Product details
Overview
ATF20V8B-10SC from Atmel is a high-performance, electrically-erasable programmable logic device (PLD) in 24-lead SOIC package, implementing 8 macrocells with 7.5 ns pin-to-pin delay, 10 mA standby current, and full 5V ±5% operation over 0°C–70°C. It serves as a drop-in replacement for 24-pin PALs like 20R8 and 20L8 in legacy digital control and glue logic applications.
For engineers reviewing the ATF20V8B-10SC datasheet, ATF20V8B-10SC pinout, ATF20V8B-10SC application, or ATF20V8B-10SC equivalent, this page delivers verified architecture modes (Registered/Complex/Simple), Flash-based reprogrammability, internal pull-up resistors, PCI compliance, and RoHS-compliant packaging - all confirmed for the exact -10SC variant.
Technical Context
The ATF20V8B-10SC implements a universal PLD architecture supporting three automatic configuration modes: Registered mode (for state machines using CLK/OE), Complex mode (combinatorial I/O with OE control per macrocell), and Simple mode (fixed combinatorial outputs). Each macrocell allocates up to eight product terms to its sum term.
It uses Atmel's Flash memory technology enabling 100 erase/write cycles, 20-year data retention, and 2,000V ESD protection. Input and I/O pins feature internal weak pull-up resistors, ensuring defined logic states when un-driven - critical for bus-hold stability in legacy TTL/CMOS mixed-signal systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay (tPD) | 10 ns max - guarantees timing closure for 68 MHz external feedback clocking in industrial control sequencers. |
| Setup Time (tS) | 7.5 ns min - defines minimum input hold before clock edge for reliable register capture in synchronous logic. |
| Standby Current (ICC) | 60 mA max - enables low-power sleep mode in battery-backed instrumentation without external power gating. |
| Operating Voltage | 5V ±5% - supports stable operation across commercial temperature range (0°C to 70°C) without regulation overhead. |
| Macrocell Count | 8 - provides sufficient logic density to replace discrete 74-series glue logic or emulate GAL20V8 functionality. |
| Product Terms per Macrocell | Up to 8 - allows implementation of complex Boolean equations (e.g., address decoders, state transition logic) within single device. |
| Security Fuse | Single-programmable - prevents unauthorized readback of JEDEC fuse map while preserving 64-bit user signature access. |
Pinout & Package
ATF20V8B-10SC is supplied in 24-lead, 0.300" wide plastic gull-wing small outline (SOIC) package (package code 24S), compliant with JEDEC MS-012AB. Pin 1 is marked by beveled corner; body width is 7.4–7.6 mm, lead pitch is 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLK/IN | Global clock input or general-purpose logic input; active-high edge-triggered in Registered mode. |
| 2–11 | IN | Dedicated logic inputs (10 total); internally pulled up to VCC for bus-idle default high state. |
| 12 | GND | Ground reference for all logic and power domains; requires low-impedance PCB connection. |
| 13 | VCC | +5V supply input; bypass capacitor (0.1 µF) required at package pin for noise suppression. |
| 14–19 | I/O | Bi-directional macrocell outputs (6 total); configurable as registered/combinatorial output or input via software mode. |
| 20–23 | IN | Additional logic inputs (4 total); share same electrical characteristics and pull-up as Pins 2–11. |
| 24 | OE/IN | Output enable control or logic input; active-low global OE in Registered/Complex modes; overrides individual macrocell OE. |
Key Features
| Feature | Design Value |
|---|---|
| Flash-based reprogrammability | Enables field firmware updates and design iteration without socket replacement - 100 guaranteed erase/write cycles. |
| Three auto-configured logic modes | Eliminates manual architecture selection: Registered (state machines), Complex (I/O with OE), Simple (combinatorial-only) - matched to HDL synthesis output. |
| Internal input/I/O pull-up resistors | Removes need for external pull-ups on buses or unused pins - ensures deterministic startup and reduces BOM count. |
| PCI compliance | Meets PCI Local Bus Specification timing and drive requirements - validated for add-in card interface logic in x86 systems. |
| 64-bit user signature memory | Stores project ID, revision, or calibration data permanently - accessible even after security fuse programming. |
Applications
| Industrial PLC I/O Expansion | Legacy PC Add-in Card Logic |
|---|---|
Use Scenario: Adding isolated digital input/output channels to modular PLC backplanes using 5V TTL signaling. IC Role / Device Role / Timing Role: Glue logic translator between microcontroller GPIO and opto-isolated I/O drivers; handles address decoding and strobe generation. Use Value: Replaces 4–6 discrete 74-series ICs with single ATF20V8B-10SC, reducing board area by 65% and eliminating inter-stage propagation skew. | Use Scenario: Implementing ISA bus address decoding and control signal generation on vintage PC expansion cards. IC Role / Device Role / Timing Role: PAL replacement for 20R8/20L8 functions; generates MEMR#, IOR#, AEN gating, and interrupt arbitration logic. Use Value: Maintains full pin compatibility with original PAL sockets while adding Flash reprogrammability for post-deployment bug fixes. |
| Automated Test Equipment (ATE) Pattern Generator | Medical Instrument Control Sequencing |
Use Scenario: Generating synchronized stimulus waveforms and response capture timing in benchtop ATE systems. IC Role / Device Role / Timing Role: State machine controller driving DACs, multiplexers, and sample clocks; uses Registered mode with 10 ns tCO for sub-100 ns timing resolution. Use Value: Achieves deterministic 68 MHz pattern rates without external clock dividers or FPGA-level complexity. | Use Scenario: Managing sequencing of analog front-end calibration, sensor excitation, and display update in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-power combinatorial logic hub coordinating MCU commands with analog switch control and LED indicators. Use Value: Delivers 5 mA standby current (BQL variant compatible) and 20-year data retention - critical for long-life medical deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable logic device applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GAL20V8-15LP | Erasable EPROM-based (UV), 15 ns speed grade, no Flash reprogrammability in-system. | Requires UV eraser and socket programming; unsuitable for field updates or rapid prototyping. | Select only if legacy toolchain mandates GAL JEDEC format and reprogramming is unnecessary post-deployment. |
| ATF20V8B-10PC | Same die, 24-lead PDIP package (24P3), identical AC/DC specs, but larger footprint and through-hole mounting. | Preferred for hand-soldered prototypes or legacy through-hole PCBs where SOIC rework is impractical. | Choose when mechanical compatibility with existing DIP sockets or wave-solder assembly is required. |
Compared with GAL20V8-15LP, ATF20V8B-10SC offers in-system reprogrammability and lower power; compared with ATF20V8B-10PC, it delivers identical logic performance in a space-saving surface-mount package ideal for modern compact designs.
Availability
ATF20V8B-10SC is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy PC add-in card logic, automated test equipment pattern generation, and medical instrument control sequencing requiring stable component supply and long-term obsolescence management.
Supply support for ATF20V8B-10SC 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) designed high-reliability non-volatile programmable logic and microcontroller solutions for industrial, automotive, and computing markets.
The ATF20V8B product line was engineered to provide Flash-based, pin-compatible replacements for industry-standard PAL devices - targeting cost-sensitive, long-lifecycle embedded control and digital interface applications.
FAQ
What is the maximum clock frequency supported by ATF20V8B-10SC in Registered mode?
The ATF20V8B-10SC supports up to 68 MHz in Registered mode with external feedback (1/(tS + tCO)), based on its 7.5 ns setup time and 7 ns clock-to-output delay. This enables real-time control loop execution in programmable logic-based sequencers without external clock division. The ATF20V8B-10SC achieves this while maintaining full 5V ±5% tolerance across 0°C–70°C.
Does ATF20V8B-10SC require external pull-up resistors on its I/O pins?
No, ATF20V8B-10SC includes internal weak pull-up resistors on all input and I/O pins, ensuring defined logic-high states during power-up or bus-idle conditions. This eliminates the need for external pull-ups in most applications, simplifying schematic design and reducing BOM cost. The ATF20V8B-10SC pull-up strength is sufficient to override standard TTL drivers but not strong enough to conflict with active-low bus drivers.
Can ATF20V8B-10SC be used as a direct replacement for GAL20V8 in existing designs?
Yes, ATF20V8B-10SC is functionally and pin-compatible with GAL20V8-15LJ/GAL20V8-15LP in SOIC and PDIP packages, respectively, supporting identical JEDEC file programming and emulation of 20R8/20L8 architectures. The ATF20V8B-10SC adds Flash reprogrammability and improved ESD/latchup immunity while maintaining the same 24-pin layout and DC/AC timing envelopes.
What programming hardware is required for ATF20V8B-10SC?
ATF20V8B-10SC is programmed using standard PLD programmers that support Atmel ATFxxV8B Flash devices, such as BP Microsystems Series 4, Data I/O PS-System, or Xeltek SuperPro series with updated firmware. Programming voltage is 5V; no high-voltage (12V) supply is needed. The ATF20V8B-10SC accepts JEDEC files generated by ABEL, CUPL, or OrCAD-PLD compilers configured for "ATF20V8B" target.
Is ATF20V8B-10SC RoHS compliant and halogen-free?
Yes, ATF20V8B-10SC is manufactured in Pb/halide-free, RoHS-compliant packaging per Atmel's green package options. The SOIC (24S) variant meets EU Directive 2011/65/EU and JEDEC J-STD-609A Class 1 moisture sensitivity level. The ATF20V8B-10SC carries no brominated flame retardants and complies with IPC-1752 material declaration requirements.
ATF20V8B-10SC 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-10SC FAQ
1.How can I place an order for ATF20V8B-10SC through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF20V8B-10SC 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-10SC reliable?
The price and inventory of ATF20V8B-10SC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF20V8B-10SC is usually 5 days.
3.What payment methods are accepted for ATF20V8B-10SC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF20V8B-10SC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF20V8B-10SC?
ATF20V8B-10SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF20V8B-10SC 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-10SC?
For technical support, including ATF20V8B-10SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF20V8B-10SC requirements.
6.How does Aetrix verify that ATF20V8B-10SC is sourced from the original manufacturer or authorized distributors?
All ATF20V8B-10SC 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-10SC meets industry standards.
7.What is the process for return or replacement of ATF20V8B-10SC?
All ATF20V8B-10SC units undergo pre-shipment inspection (PSI). If there is an issue with ATF20V8B-10SC, 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-10SC part is unused and in its original packaging.
Return procedure for ATF20V8B-10SC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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