My Inquiry
My Account
Microchip Technology ATF2500C-20JI
- Part No.:
- ATF2500C-20JI
- Manufacturer:
- Microchip Technology
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
ATF2500C-20JI.pdf
- Description:
- IC CPLD 24MC 20NS 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,286
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ATF2500C-20JI from Atmel is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) in a 44-lead PLCC package, delivering 15 ns pin-to-pin delay at 5V, 24 flexible macrocells with dual flip-flops each (48 total), and full logic array connectivity with 416 product terms. It serves as a drop-in speed upgrade for ATV2500B/BQ and ATV2500H in industrial control and legacy system re-engineering.
For engineers reviewing the ATF2500C-20JI datasheet, ATF2500C-20JI pinout, ATF2500C-20JI application, or ATF2500C-20JI equivalent, key selection considerations include its -20 speed grade (20 ns max tPD), industrial temperature range (-40°C to +85°C), programmable D/T-type registers per macrocell, and compatibility with Atmel WinCUPL and third-party JEDEC programmers supporting V2500 cross-programming modes.
Technical Context
The ATF2500C-20JI implements a single universal logic array where all 38 I/O pins and 48 flip-flop outputs feed directly into every macrocell's 416-product-term structure. Each of its 24 macrocells provides three sum terms combinable into up to 12 product terms per output without speed penalty.
It supports individual asynchronous reset, OE control, and clocking per macrocell-via dedicated product terms or direct input pins-and enables buried combinatorial feedback by bypassing Q2 to the logic array. All 48 registers reset on power-up, and preload/observability functions are accessible via SMP pin voltage thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Pin-to-Pin Delay | 20 ns at 5V - defines worst-case propagation through registered or combinatorial paths for timing-critical state machines. |
| Logic Density | 24 macrocells / 48 flip-flops - supports complex sequential logic with up to 48 buried registers and 24 combinatorial outputs simultaneously. |
| Product Terms | 416 fully connected - enables high gate utilization and eliminates routing congestion in dense logic implementations. |
| Operating Temperature | -40°C to +85°C - qualified for industrial environments including factory automation and motor control systems. |
| Supply Voltage | 5V ±10% - compatible with legacy 5V TTL/CMOS systems without level-shifting requirements. |
| I/O Count | 38 logic pins (24 I/O + 14 dedicated inputs) - provides ample interface capability for bus bridging, protocol translation, and glue logic consolidation. |
| ESD Protection | 2000V HBM - ensures robust handling during board assembly and field service in uncontrolled environments. |
Pinout & Package
ATF2500C-20JI uses a 44-lead Plastic J-Leaded Chip Carrier (PLCC) package (JEDEC MS-018 AC), with 16 mm × 16 mm body, 1.27 mm pitch, and gull-wing leads. Pin 1 is marked by a corner notch; pins 4 and 26 are optional GND connections recommended for noise immunity but not required for functional compatibility with ATV2500H/BQ.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (P11, P12) | Power Supply | Dual 5V supply pins reduce IR drop and improve noise margin across high-speed switching activity. |
| GND (P33, P34) | Ground Reference | Dedicated ground pair minimizes ground bounce in multi-macrocell register transitions. |
| CLK/IN (P1) | Global Clock Input | Accepts external clock or logic signal; selectable as pin-clock source for any macrocell via configuration. |
| I/O0–I/O23 | Bi-directional I/O Buffers | Even/odd grouping allows independent OE control per macrocell; supports bus-hold (pin-keeper) when enabled. |
| IN2–IN15 | Dedicated Inputs | 14 non-I/O logic inputs provide additional array fan-in without consuming I/O resources. |
Key Features
| Feature | Design Value |
|---|---|
| Selectable D- or T-type flip-flops | Per-macrocell register type selection enables efficient JK/SR synthesis and reduces product term usage in counters and FSMs. |
| Buried combinatorial feedback | Q2 output can bypass flip-flop to feed logic array directly-expands effective gate count without I/O pin overhead. |
| Individual macrocell OE and reset | Enables dynamic I/O direction control and localized state initialization-critical for multi-protocol interface designs. |
| Programmable pin-keeper circuits | Weak latches hold floating I/Os at last-driven state-eliminates need for external pull-ups in bus arbitration and hot-swap applications. |
| User row (64 bits) | Non-volatile storage for unit serialization, calibration data, or firmware revision tracking-accessible via programming tools. |
Applications
| Industrial PLC I/O Expansion | Legacy System Bus Interface |
|---|---|
Use Scenario: Adding isolated digital I/O channels to programmable logic controllers using existing 5V backplane infrastructure. IC Role / Device Role / Timing Role: Glue logic CPLD managing address decoding, strobe generation, and bidirectional data handshaking between CPU and peripheral modules. Use Value: Replaces multiple discrete SSI/MSI ICs with one ATF2500C-20JI, reducing BOM count and PCB area while maintaining 5V TTL compatibility and industrial temp operation. |
Use Scenario: Interfacing modern microcontrollers to legacy ISA or VMEbus peripherals requiring precise timing and signal conditioning. IC Role / Device Role / Timing Role: Protocol translator implementing wait-state insertion, bus arbitration, and level conversion between mismatched clock domains. Use Value: Leverages 20 ns tPD and individual macrocell clocking to meet strict setup/hold timing across heterogeneous buses without external delay elements. |
| Military Avionics Control Logic | Test Equipment Pattern Generator |
Use Scenario: Implementing fault-tolerant control sequencing in airborne flight control subsystems operating across -55°C to +125°C (using military-grade variants). IC Role / Device Role / Timing Role: State machine supervisor coordinating sensor sampling, actuator enablement, and watchdog monitoring with deterministic reset behavior. Use Value: Power-up reset guarantee and 10-year data retention ensure reliable boot-time initialization and long-term configuration integrity in sealed avionics enclosures. |
Use Scenario: Generating synchronized stimulus waveforms for IC validation, requiring precise edge placement and pattern repetition. IC Role / Device Role / Timing Role: High-speed pattern sequencer using internal counters and registered outputs to drive DUT clock/data lines. Use Value: 48 flip-flops and 416 product terms support multi-phase, multi-cycle test vectors; preload mode simplifies test vector loading during debug sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD-based logic implementation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF2500C-20JC | Same silicon, commercial temperature range (0°C to +70°C); identical speed grade and pinout. | Limited to non-industrial environments such as lab equipment or office automation. | Select when cost sensitivity outweighs environmental ruggedness and ambient temperature stays within commercial limits. |
| ATF2500C-20PI | Same functionality in 40-pin PDIP package (40P6), 20 ns speed grade, industrial temp rating. | Requires different PCB footprint and offers lower I/O count (32 vs. 38 pins) due to package constraints. | Choose for through-hole prototyping, repair of legacy PDIP-based systems, or manual assembly workflows. |
Compared with ATF2500C-20JC and ATF2500C-20PI, the ATF2500C-20JI uniquely combines industrial temperature operation, 44-pin PLCC packaging for higher I/O density, and surface-mount compatibility-making it optimal for volume-manufactured industrial controllers where thermal reliability and board space efficiency are critical.
Availability
ATF2500C-20JI is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, and legacy system upgrades requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.
Supply support for ATF2500C-20JI 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 semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and programmable logic devices with emphasis on embedded control and system-on-chip integration.
The ATF2500C family was designed to deliver high-density, reprogrammable logic in compact packages for industrial, military, and communications equipment requiring field-upgradable glue logic and protocol adaptation.
FAQ
What is the maximum operating frequency supported by the ATF2500C-20JI?
The ATF2500C-20JI supports an external feedback maximum frequency of 40 MHz under industrial conditions (tCOS = 11 ns). This is derived from the 1/(tSIS + tCOS) calculation using the -20 speed grade's 9 ns input setup time and 11 ns clock-to-output delay. Internal feedback paths achieve up to 50 MHz, and no-feedback operation reaches 45 MHz-values confirmed in Section 11.6 and 11.7 of the datasheet.
Does the ATF2500C-20JI require external pull-up resistors on unused I/O pins?
No. The ATF2500C-20JI includes programmable pin-keeper circuits that maintain the last-driven state on unasserted I/Os when enabled. This eliminates the need for external pull-ups in bus-hold applications. Pin-keepers are disabled by default and activated only when selecting device types like V2500CPPKLCC in Atmel WinCUPL or enabling the corresponding fuse in third-party JEDEC files.
Is the ATF2500C-20JI pin-compatible with the older ATV2500H device?
Yes-the ATF2500C-20JI is a direct replacement for the ATV2500H in PLCC packaging, including identical pin assignments and optional GND pins (P4 and P26). Its functional subset mode (using ATV2500H JEDEC files) disables T-type flip-flops and pin clocking, ensuring seamless migration without PCB changes or layout modifications.
How does the power-up reset function work in the ATF2500C-20JI?
The ATF2500C-20JI resets all 48 registers to low state when VCC crosses VRST (3.8–4.5 V) during power ramp-up. This occurs within 600–1000 ns (tPR), provided VCC rise is monotonic and input setup times are met before clock activation. The feature ensures deterministic initial state in safety-critical control logic without external reset circuitry.
Can the ATF2500C-20JI be programmed using standard third-party programmers?
Yes-major third-party programmers support ATF2500C-20JI via three JEDEC file modes: V2500 (cross-programming with ATV2500H, disabling user row and pin-keeper), V2500B (cross-programming with ATV2500B/BQ), and full ATF2500C mode (enabling user row and pin-keeper fuses). Total fuse count is 71816, and checksum compatibility is maintained across migration modes.
ATF2500C-20JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF2500C(L)
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Programmable Type:
- In System Programmable
- Delay Time tpd(1) Max:
- 20 ns
- Voltage Supply - Internal:
- 4.5V ~ 5.5V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 24
- Number of Gates:
- -
- Number of I/O:
- 24
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
ATF2500C-20JI FAQ
1.How can I place an order for ATF2500C-20JI through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF2500C-20JI 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-20JI reliable?
The price and inventory of ATF2500C-20JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF2500C-20JI is usually 5 days.
3.What payment methods are accepted for ATF2500C-20JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF2500C-20JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF2500C-20JI?
ATF2500C-20JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF2500C-20JI 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-20JI?
For technical support, including ATF2500C-20JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF2500C-20JI requirements.
6.How does Aetrix verify that ATF2500C-20JI is sourced from the original manufacturer or authorized distributors?
All ATF2500C-20JI 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-20JI meets industry standards.
7.What is the process for return or replacement of ATF2500C-20JI?
All ATF2500C-20JI units undergo pre-shipment inspection (PSI). If there is an issue with ATF2500C-20JI, 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-20JI part is unused and in its original packaging.
Return procedure for ATF2500C-20JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF2500C-20JI 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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
