Microchip Technology ATF20V8BQ-10JC

Overview

ATF20V8BQ-10JC from Atmel is a high-speed, electrically-erasable programmable logic device (PLD) in a 28-lead PLCC package, delivering 10 ns maximum pin-to-pin delay, 35 mA standby current, and 40 mA active current at 5V. It supports registered, complex, and simple PAL emulation modes and operates across commercial temperature range (0°C to 70°C). Used for legacy logic replacement in industrial control backplanes and telecom interface glue logic.

For engineers reviewing the ATF20V8BQ-10JC datasheet, ATF20V8BQ-10JC pinout, ATF20V8BQ-10JC application, or ATF20V8BQ-10JC equivalent, this page provides verified functional architecture details, mode-specific macrocell allocation, power consumption data per operating state, and confirmed PLCC pin mapping - all extracted from Atmel's official Rev. 0407J–07/06 documentation.

Technical Context

The ATF20V8BQ-10JC implements a universal 8-macrocell architecture with configurable logic array and product-term-based output enable, supporting three distinct operational 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 pin feedback paths enable full I/O capability in complex mode.

It uses Atmel's Flash-based nonvolatile memory for reprogrammability, features internal input/I/O pull-up resistors for floating-pin immunity, and includes a security fuse to prevent unauthorized pattern readback while preserving 64-bit user signature memory accessible regardless of fuse state.

Key Specifications

Pinout & Package

ATF20V8BQ-10JC is housed in a 28-lead Plastic J-leaded Chip Carrier (PLCC) package, compliant with JEDEC MS-018 AB, with 1.27 mm pitch, 12.32 mm × 12.32 mm body, and 0.51 mm max lead thickness. Pin 1 identifier is marked by a beveled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ATF20V8B-10JC, the ATF20V8BQ-10JC reduces standby power by 42% and active power by 50%, enabling longer thermal margin in dense layouts; versus GAL20V8Z-10LP, it offers in-system reprogrammability and integrated security features but requires Flash-aware programming hardware.

Availability

ATF20V8BQ-10JC is available at Aetrix Electronics and suitable for industrial control backplanes, legacy telecom interface modules, and automated test equipment requiring stable component supply and long-lifecycle support.

Supply support for ATF20V8BQ-10JC 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, Flash-based programmable logic and microcontroller solutions for industrial, automotive, and communications markets.

The ATF20V8BQ series belongs to Atmel's electrically-erasable PLD product line, engineered specifically for drop-in replacement of legacy 24-pin PAL devices while adding Flash reprogrammability, lower power, and enhanced security features.

FAQ

What is the maximum operating frequency supported by ATF20V8BQ-10JC?

The ATF20V8BQ-10JC supports a maximum external feedback frequency of 68 MHz, derived from its 7.5 ns minimum setup time and 7 ns clock-to-output delay. This value assumes optimal PCB layout, proper decoupling, and operation within the commercial temperature range (0°C to 70°C) at 5V ± 5%. The actual achievable system clock rate depends on logic depth and routing; the ATF20V8BQ-10JC datasheet specifies timing under defined load and voltage conditions.

Does ATF20V8BQ-10JC require external pull-up resistors on its I/O pins?

No, ATF20V8BQ-10JC includes internal input and I/O pull-up resistors, ensuring known logic states when pins are un-driven. These weak pull-ups can be overdriven by standard TTL-compatible drivers and eliminate the need for external components in most designs. The ATF20V8BQ-10JC datasheet confirms this feature applies across all operating modes and package variants, including the PLCC version.

Can ATF20V8BQ-10JC emulate PAL20R8 functionality?

Yes, ATF20V8BQ-10JC fully emulates PAL20R8 in registered mode, allocating eight product terms per macrocell and supporting identical pinout mapping for direct replacement. The ATF20V8BQ-10JC achieves this using its universal architecture and automatic mode selection - no hardware modification is needed beyond verifying VCC and timing compliance. Emulation is validated in Atmel's official documentation and supported by industry-standard PLD compilers.

What is the purpose of the security fuse in ATF20V8BQ-10JC?

Programming the security fuse in ATF20V8BQ-10JC disables fuse pattern readback and preload verification, preventing unauthorized copying of programmed logic. Once set, the fuse is irreversible. Crucially, the 64-bit user signature memory remains fully accessible even after fuse programming, allowing continued use for project identification. This behavior is explicitly documented for ATF20V8BQ-10JC in the "Security Fuse Usage" section of the datasheet.

Is ATF20V8BQ-10JC RoHS compliant?

Yes, ATF20V8BQ-10JC is offered in green package options compliant with Pb/Halide-free and RoHS requirements, as confirmed in the "ATF20V8B Green Package Options" section of the official datasheet. The -10JC suffix denotes the commercial-grade PLCC variant, and Atmel explicitly lists RoHS-compliant versions (e.g., -10JU) alongside it - confirming the underlying die and process meet environmental standards. Aetrix Electronics supplies only RoHS-compliant units unless otherwise specified.