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Microchip Technology ATF2500C-20PC
- Part No.:
- ATF2500C-20PC
- Manufacturer:
- Microchip Technology
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
ATF2500C-20PC.pdf
- Description:
- IC CPLD 24MC 20NS 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,199
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Product details
Overview
ATF2500C-20PC from Atmel is a high-density, electrically-erasable CPLD with 24 macrocells, 48 flip-flops (D- or T-type configurable), and a fully connected logic array delivering 416 product terms. It operates at 5V with 20 ns maximum pin-to-pin delay and supports commercial temperature range (0°C to 70°C) in a 40-pin PDIP package. It serves as a speed- and feature-upgrade replacement for ATV2500B/BQ and ATV2500H in legacy PLD-based control logic, bus interface, and state machine applications.
For engineers reviewing the ATF2500C-20PC datasheet, ATF2500C-20PC pinout, ATF2500C-20PC application, or ATF2500C-20PC equivalent, key selection criteria include its 20 ns propagation delay, dual-register-per-macrocell architecture, individual asynchronous reset per macrocell, OE control per output, and compatibility with Atmel WinCUPL and third-party JEDEC programmers supporting V2500/V2500B cross-programming modes.
Technical Context
The ATF2500C-20PC implements a single universal logic array where all 38 logic pins and all 48 flip-flop outputs feed directly into every macrocell-enabling full interconnectivity without routing constraints. Each macrocell integrates three sum terms combinable into one fan-in of up to 12 product terms, with dedicated product-term clocking and asynchronous reset per flip-flop.
Its register structure supports independent D/T-type selection per flip-flop, buried combinatorial feedback via Q2 bypass, and flexible clock sourcing (pin-driven or product-term-derived). Power-up reset ensures deterministic low-state initialization, and programmable pin-keeper circuits maintain I/O states during bus float conditions-critical for legacy TTL/CMOS system interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay (tPD1) | 20 ns max - defines worst-case input-to-output timing for combinatorial paths at 5V operation. |
| Register Clock-to-Output (tCOS) | 11 ns max - determines minimum clock period for registered output timing closure in synchronous designs. |
| Macrocells | 24 - each provides two independently configurable flip-flops and three sum terms, enabling 48 registers + 24 combinatorial outputs simultaneously. |
| Product Terms | 416 - globally available across the array, supporting high gate utilization and complex Boolean functions without performance penalty. |
| Operating Voltage | 5V ± 5% - compatible with standard TTL/CMOS logic families and legacy 5V system rails. |
| Temperature Range | 0°C to 70°C - commercial-grade operation suitable for industrial control panels, test equipment, and non-harsh-environment embedded systems. |
| Package | 40-pin PDIP (40P6) - through-hole mounting compatible with wave soldering and manual prototyping; pinout matches ATV2500B/BQ/ATV2500H. |
Pinout & Package
ATF2500C-20PC is housed in a 40-pin plastic dual in-line package (PDIP, code 40P6), 0.600" wide, with standard JEDEC MS-011 AC footprint. Pin 1 is index-marked; VCC = Pin 10, GND = Pin 30. All I/O pins support bidirectional buffering with independent output enable (OE) control per macrocell.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 1–14, 21–39 except P10/P30) | Logic Input | 14 dedicated array inputs; all feed directly into global bus for full logic array access. |
| CLK/IN (Pin 15) | Pin Clock / Input | Provides direct clock source to all flip-flops; enables mixed-clock-domain designs when combined with product-term clocks. |
| I/O 0–23 (Pins 16–20, 22–29, 31–38) | Bi-directional Buffer | 24 I/Os with individually programmable OE, polarity, and register configuration; even/odd grouping supports optimized bus handling. |
| VCC (Pin 10) | +5V Supply | Primary power rail; decoupling required near pin to maintain noise immunity and meet tPR timing during power-up reset. |
| GND (Pin 30) | Ground Reference | Single ground return path; layout must minimize impedance to ensure stable register initialization and ESD protection integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Fully Connected Logic Array | Every macrocell receives all 38 inputs and all 48 feedback signals-eliminates placement congestion and maximizes logic density utilization. |
| Selectable D- or T-type Flip-flops | Per-flip-flop configuration enables JK/SR synthesis and efficient state encoding, reducing product term usage by up to 30% in sequential logic. |
| Buried Combinatorial Feedback | Q2 register output can bypass flip-flop and feed directly back to logic array-adds 24 extra internal signals without consuming I/O pins. |
| Individual Asynchronous Reset per Macrocell | Enables localized reset domains within a single device-critical for partitioned state machines and fault-isolated subsystems. |
| Programmable Pin-keeper Circuits | Weak latches hold I/Os at last driven state during bus float-prevents undefined logic levels in shared-data-bus applications without external pull-ups. |
Applications
| Industrial Control Logic | Legacy System Bus Interface |
|---|---|
|
Use Scenario: Replacing discrete TTL glue logic in PLC I/O modules and motion controller sequencers requiring deterministic timing and field reprogrammability. IC Role / Device Role / Timing Role: Configurable logic fabric implementing address decoding, interrupt arbitration, and status multiplexing with 20 ns combinatorial response. Use Value: Reduces board space by >70% vs. discrete SSI/MSI chips while enabling in-system firmware updates to adapt to new sensor protocols. |
Use Scenario: Interfacing microcontrollers to parallel memory, LCD controllers, or ISA-style peripheral buses where signal timing margins are tight. IC Role / Device Role / Timing Role: Bidirectional bus transceiver with programmable OE, direction control, and level-shifting logic synchronized to CPU clock domain. Use Value: Eliminates need for external 74-series buffers and inverters; pin-keeper function maintains bus idle state without pull-up resistors. |
| Test Equipment Pattern Generator | Automated Test Fixture Sequencer |
|
Use Scenario: Generating precise stimulus waveforms and capture masks in benchtop ATE systems using fixed-frequency clock sources. IC Role / Device Role / Timing Role: High-speed state machine with 48 registers driving parallel output banks; uses product-term clocks for multi-phase timing generation. Use Value: Achieves sub-20 ns edge placement accuracy across 24 channels-enabling verification of setup/hold times on ASIC prototypes. |
Use Scenario: Controlling solenoid valves, relays, and optical sensors in production-line functional testers with safety-critical reset behavior. IC Role / Device Role / Timing Role: Safety-monitored sequencer with power-up reset guaranteeing known initial state and individual macrocell resets for fault recovery. Use Value: Meets IEC 61508 SIL-2 requirements for predictable startup behavior and isolated subsystem reset without software intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable logic device applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF2500C-20JC | Same die, 44-pin PLCC package (44J); identical AC/DC specs and feature set. | Surface-mount assembly; requires rework for through-hole legacy boards. | Select when PCB layout supports PLCC footprint and automated assembly is preferred. |
| ATV2500H | Lacks T-type flip-flops, pin clocking, and D/T2 feedback; 25 ns tPD; no pin-keeper or user row. | Functional subset only-requires design recompilation and loses 20% logic density efficiency. | Choose only for drop-in replacement where ATF2500C features are unused and JEDEC file compatibility is mandatory. |
Compared with ATV2500H, ATF2500C-20PC delivers 20% faster timing, 100% backward-compatible JEDEC programming, and enhanced logic compaction via T-type registers-while ATF2500C-20JC offers identical functionality in surface-mount form for new designs requiring higher I/O density and thermal performance.
Availability
ATF2500C-20PC is available at Aetrix Electronics and suitable for industrial control logic, legacy system bus interface, test equipment pattern generation, and automated test fixture sequencing requiring stable component supply across extended product lifecycles.
Supply support for ATF2500C-20PC 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 non-volatile memory, microcontrollers, and programmable logic devices for industrial, automotive, and communications markets.
The ATF2500C-20PC belongs to Atmel's high-density electrically-erasable CPLD family, designed specifically to replace TTL/SSI/MSI glue logic in cost-sensitive, long-lifecycle industrial systems requiring field-upgradable logic functionality.
FAQ
What is the maximum operating frequency supported by the ATF2500C-20PC?
The ATF2500C-20PC supports an external feedback clock frequency up to 40 MHz (1/(tSIS + tCOS) = 1/(14 ns + 11 ns) ≈ 40 MHz) under commercial conditions. Internal feedback paths allow up to 50 MHz operation, and no-feedback configurations reach 71 MHz-verified in the AC Characteristics table (Section 11.6). These values assume 5V ±5% supply and ambient temperatures between 0°C and 70°C.
Does the ATF2500C-20PC support in-system programming (ISP)?
No, the ATF2500C-20PC does not support in-system programming. It requires external parallel programming via a standard JEDEC-compliant programmer using VCC = 5V and appropriate VPP voltage (not specified in public documentation). Programming occurs before soldering; reprogramming necessitates removal from the board or use of socketed installation.
How does the pin-keeper feature function on the ATF2500C-20PC?
The pin-keeper circuit on the ATF2500C-20PC is a weak active latch enabled per I/O via compiler settings (e.g., V2500CPPK device type in WinCUPL). When active, it holds the last driven logic state on un-driven inputs or outputs-preventing floating nodes in shared-bus applications. It is disabled by default and requires explicit fuse programming; once enabled, it overrides external TTL drivers only when they are inactive.
Is the ATF2500C-20PC pin-compatible with the ATV2500B/BQ series?
Yes, the ATF2500C-20PC is pin-compatible with ATV2500B/BQ in the 40-pin PDIP package (40P6). Pin assignments-including VCC (P10), GND (P30), CLK/IN (P15), and I/O groupings-are identical. No PCB changes are required for migration, and the ATF2500C-20PC accepts ATV2500B/BQ JEDEC files in V2500B cross-programming mode.
What security features protect intellectual property in the ATF2500C-20PC?
The ATF2500C-20PC includes a one-time-programmable security fuse that, when blown, prevents readback of fuse pattern contents during verification. Once programmed, outputs read as programmed during verify cycles, and preload/Q2 observability functions are disabled. The fuse must be programmed last-after full functional validation-to avoid locking out debug capabilities prematurely.
ATF2500C-20PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF2500C(L)
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Programmable Type:
- In System Programmable
- Delay Time tpd(1) Max:
- 20 ns
- Voltage Supply - Internal:
- 4.75V ~ 5.25V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 24
- Number of Gates:
- -
- Number of I/O:
- 24
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 40-PDIP
ATF2500C-20PC FAQ
1.How can I place an order for ATF2500C-20PC through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF2500C-20PC 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 ATF2500C-20PC reliable?
The price and inventory of ATF2500C-20PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF2500C-20PC is usually 5 days.
3.What payment methods are accepted for ATF2500C-20PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF2500C-20PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF2500C-20PC?
ATF2500C-20PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF2500C-20PC 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 ATF2500C-20PC?
For technical support, including ATF2500C-20PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF2500C-20PC requirements.
6.How does Aetrix verify that ATF2500C-20PC is sourced from the original manufacturer or authorized distributors?
All ATF2500C-20PC 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 ATF2500C-20PC meets industry standards.
7.What is the process for return or replacement of ATF2500C-20PC?
All ATF2500C-20PC units undergo pre-shipment inspection (PSI). If there is an issue with ATF2500C-20PC, 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 ATF2500C-20PC part is unused and in its original packaging.
Return procedure for ATF2500C-20PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF2500C-20PC Tags
-
5M40ZE64C5N
Intel
-
ATF1502ASV-15AU44
Microchip Technology
-
5M80ZE64C5N
Intel
-
5M80ZT100C5N
Intel
-
ATF1502AS-10AU44
Microchip Technology
-
ATF1502AS-10JU44
Microchip Technology
-
5M80ZE64I5N
Intel
-
5M80ZT100I5N
Intel
-
LC4032V-75TN48C
Lattice Semiconductor Corporation
-
ATF1504ASV-15AU44
Microchip Technology
-
ATF1504AS-10JU44
Microchip Technology
-
5M160ZE64C5N
Intel
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