Information of ATF2500C-20JI CPLD (Complex Programmable Logic Device)

Basic Overview

• Product Type: High-density electrically-erasable programmable logic device (CPLD)
• Manufacturer: Atmel Corporation (now part of Microchip Technology)
• Document Reference: 0777K–PLD–1/24/08 (Rev. K, Jan. 2008)
• Core Function: Implements custom digital logic functions with flexible macrocell configuration, suitable for high-performance embedded systems and industrial control applications
• Key Features: 416 product terms, 24 flexible output macrocells (48 total flip-flops), 15 ns maximum pin-to-pin delay (5V operation), fully connected logic array, software-compatible with ATV2500B/BQ/ATV2500H, security fuse for code protection, pin-keeper circuits for bus interfacing, 2000V ESD protection, 10-year data retention, RoHS-compliant green package options available
• Key Identifiers:

Core Specifications

1. Absolute Maximum Ratings

2. DC Operating Conditions

3. DC Electrical Characteristics (TA=-40°C to +85°C, VCC=4.5V to 5.5V)

4. AC Electrical Characteristics (TA=-40°C to +85°C, VCC=4.5V to 5.5V)

5. Power-Up Reset Characteristics

Functional Details

1. Core Architecture

• Logic Array: Fully connected, 416 product terms, 172 inputs per AND gate, 3 sum terms per macrocell (combinable to 12 product terms per sum term with no speed penalty)
• Macrocells: 24 output macrocells, each with 2 flip-flops (48 total), individually configurable as D-type or T-type (supports JK/SR flip-flop emulation)
• Clock Options: Product term clocking or direct input pin clocking for each flip-flop; independent clocks for buried state machines/counters
• Resets/Presets: Individual asynchronous resets per flip-flop; 8 synchronous preset product terms (grouped 2/4 per macrocell)
• Feedback Paths: Independent I/O pin and flip-flop feedback paths; buried combinatorial feedback (bypasses I/O pins to save resources)

2. Key Functional Features

• Pin-Keeper Circuits: Programmable weak latches for bus interfacing, maintain last driven state on floating pins (disabled by default)
• Security Fuse: Prevents unauthorized copying of fuse patterns; inhibits preload and observability features when programmed
• Preload/Observability: Asynchronous register preload for test sequencing; Q2 observability mode to access buried registers
• User Row: 64-bit storage for unit history or configuration data
• Power-Up Reset: All registers reset to low state automatically on power-up (monotonic VCC rise required)

Package and Pin Configuration

1. Package Specifications (44-lead PLCC "J" Type)

2. Pin Functionality

Application Guidelines

1. Typical Applications

• Industrial control systems
• Embedded system logic integration
• High-side drivers and power control
• Bus interfacing and protocol conversion
• State machines and counters
• Replacements for ATV2500B/BQ/ATV2500H devices (speed upgrade)
• Data acquisition and ATE (Automatic Test Equipment)

2. Key Design Notes

• Supply Voltage: Use 5V ±10% for industrial operation; ensure monotonic VCC rise for reliable power-up reset
• Software Configuration: Use Atmel-WinCUPL with device mnemonic "V2500LCC" (pin-keeper disabled) or "V2500CPPKLCC" (pin-keeper enabled)
• Third-Party Programmers: Compatible with JEDEC files for V2500, V2500B, and ATF2500C (71816 fuses)
• Security: Program the security fuse last to protect logic patterns; inhibits readback and test features
• Pin Handling: Unused inputs/I/Os require termination when pin-keepers are disabled; enable pin-keepers for bus applications
• Thermal Management: Operate within -40°C to +85°C ambient; avoid exceeding 150°C junction temperature

Ordering and Packaging

1. Part Number Breakdown

2. Complementary Variants

Reliability and Compliance