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Microchip Technology ATF1502AS-15AC44
- Part No.:
- ATF1502AS-15AC44
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1502AS-15AC44.pdf
- Description:
- IC CPLD 32MC 15NS 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,541
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Product details
Overview
ATF1502AS-15AC44 from Atmel is a high-performance, electrically-erasable Complex Programmable Logic Device (CPLD) with 32 macrocells, 5 product terms per macrocell (expandable to 40), 44-pin TQFP package, 7.5 ns maximum pin-to-pin delay, and registered operation up to 125 MHz. It integrates legacy TTL/SSI/MSI logic in industrial control, PCI interface bridging, and embedded state-machine applications.
For engineers reviewing the ATF1502AS-15AC44 datasheet, ATF1502AS-15AC44 pinout, ATF1502AS-15AC44 application, or ATF1502AS-15AC44 equivalent, key selection criteria include its JTAG-based in-system programmability, PCI-compliant 5V I/O drive capability, global clock architecture with three dedicated GCLK pins, and power-down mode controlled via PD1/PD2 pins.
Technical Context
The ATF1502AS-15AC44 implements a hierarchical routing architecture with a global bus feeding all 32 macrocells and a regional foldback bus enabling up to nine-product-term sum terms per region. Each macrocell supports combinatorial or registered outputs with buried feedback, D/T latch configurable flip-flops, and programmable output slew rate or open-collector mode.
It features IEEE 1149.1-compliant JTAG boundary-scan testing, programmable pin-keeper inputs/I/Os, VCC power-up reset with selectable hysteresis, and security fuse protection. The device supports both standard and reduced-power macrocell modes, with automatic 10 µA standby for "L" variants - though ATF1502AS-15AC44 is the standard-speed "AS" version rated for commercial temperature range (0°C to 70°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 32 macrocells with 5 base + up to 35 expandable product terms per macrocell |
| Max Pin-to-pin Delay | 7.5 ns - enables synchronous logic at ≤125 MHz registered operation |
| Package | 44-lead TQFP - surface-mount, 10 mm × 10 mm footprint, 0.8 mm pitch |
| Supply Voltage | 5.0 V ±5% - compatible with legacy 5V TTL/PCI signaling domains |
| JTAG Interface | IEEE 1149.1-compliant 4-pin TAP (TDI, TDO, TCK, TMS) - enables in-system programming and boundary-scan test |
| PCI Compliance | Fully compliant with PCI electrical specs: VOH ≥2.4 V @ –2 mA, VOL ≤0.55 V @ 3–6 mA, low skew, high-drive capability |
| Global Clock Pins | Three dedicated GCLK1/GCLK2/GCLK3 pins - support independent clock domains and input transition detection (ITD) |
Pinout & Package
ATF1502AS-15AC44 is housed in a 44-lead Thin Quad Flat Package (TQFP), RoHS-compliant, with exposed pad not electrically connected. Pinout follows standard top-view layout with corner pin 1 marked by dot or bevel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43 | I/O or dedicated input | Bi-directional logic I/O (32 pins) plus four dedicated inputs usable as GCLR, OE1, GCLK1–3 - all support pin-keeper, slew control, and open-collector configuration |
| 44 | TDI/I/O | JTAG Test Data In - dual-role: primary TDI signal or general-purpose I/O when JTAG disabled |
| 3, 6, 11, 14, 17, 20, 23, 26, 29, 32, 35, 38, 41 | GND | Ground reference - 13 total GND pins distributed for noise reduction and signal integrity |
| 10, 16, 25, 36, 40 | VCC | 5V core supply - five dedicated VCC pins ensure stable power delivery across logic array |
| 37 | GCLK2/OE2/I | Global clock 2 / output enable 2 / input - configurable as clock source, OE control, or general input |
| 39 | GCLR/I | Global clear input - asynchronous reset for all macrocell flip-flops |
| 34 | OE1/I | Output enable 1 - controls tri-state behavior of selected I/O groups |
| 33 | GCLK1/I | Global clock 1 - primary clock input with ITD circuitry for glitch-free edge detection |
| 42 | GCLK3/I/O | Global clock 3 / I/O - supports clocking and bidirectional data transfer |
| 27, 28 | PD1/I/O, PD2/I/O | Power-down control - active-high pins that force device into <5 mA standby when asserted |
Key Features
| Feature | Design Value |
|---|---|
| In-System Programmability (ISP) | Full JTAG-based reprogramming without device removal - enables field updates and manufacturing flexibility |
| Programmable Slew Rate | Per-output control to reduce EMI and crosstalk on high-speed buses like PCI |
| Buried Registered Feedback | Enables dual-latch functionality within single macrocell - improves logic density for state machines |
| Input Transition Detection (ITD) | Dedicated hardware on GCLK, inputs, and I/O - eliminates external debounce circuits for asynchronous event capture |
| Security Fuse & User Signature | One-time programmable fuse prevents bitstream copying; 16-bit user-accessible signature stores revision or project ID |
| PCI-Compliant I/O Drivers | Guaranteed VOH ≥2.4 V @ –2 mA and VOL ≤0.55 V @ 6 mA - meets PCI Local Bus Rev 2.2 requirements |
Applications
| Industrial PLC I/O Expansion | PCI Bus Interface Logic |
|---|---|
Use Scenario: Replacing discrete TTL glue logic in programmable logic controller backplanes handling sensor inputs and relay outputs. IC Role / Device Role / Timing Role: CPLD implementing address decoding, strobe generation, and register-mapped I/O control with deterministic 7.5 ns propagation. Use Value: Reduces board space and BOM count while supporting hot-swap-compatible timing margins via programmable output enable and slew control. | Use Scenario: Bridging legacy microcontrollers to PCI add-in cards in test equipment and data acquisition systems. IC Role / Device Role / Timing Role: Protocol translator and timing adapter managing PCI command/address latching, DEVSEL# assertion, and parity generation. Use Value: Meets PCI DC/AC specs without external buffers; leverages three global clocks for independent AD, C/BE#, and FRAME# timing domains. |
| Legacy System Emulation | Automated Test Equipment (ATE) Control |
Use Scenario: Emulating obsolete PAL/GAL devices in avionics maintenance rigs where original parts are unavailable. IC Role / Device Role / Timing Role: Pin-compatible logic replacement with identical truth tables and setup/hold timing verified against original JEDEC files. Use Value: Enables drop-in replacement using JTAG ISP - no PCB rework needed; security fuse prevents reverse-engineering of proprietary logic. | Use Scenario: Generating synchronized stimulus patterns and capturing response waveforms in boundary-scan test fixtures. IC Role / Device Role / Timing Role: High-speed pattern generator with precise clock-to-output skew control and programmable tri-state sequencing. Use Value: Uses internal ITD circuits to detect DUT signal edges and trigger responses within 1 ns jitter; JTAG BSDL enables automated test vector generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XCR3064XL-10VQ44C | 64 macrocells, 3.3 V core, 10 ns tPD, CoolRunner-II architecture with lower static current | Requires level-shifting for 5V PCI bus; better suited for low-power portable instrumentation | Select when migrating to 3.3 V systems and requiring higher density; not pin-compatible with ATF1502AS-15AC44 |
| EPM3064ATC44-10 | 64 macrocells, 5 V tolerant I/O, 10 ns tPD, MAX 3000A family with enhanced routing | Higher gate count but larger tPD margin; lacks built-in ITD and pin-keeper circuits | Prefer for new designs needing more logic resources and JTAG debug visibility; requires different fitter toolchain |
Compared with XCR3064XL-10VQ44C and EPM3064ATC44-10, the ATF1502AS-15AC44 delivers native 5V PCI compliance, integrated input transition detection, and pin-keeper functionality - making it uniquely suitable for retrofitting legacy 5V industrial controllers without voltage translation or external pull-ups.
Availability
ATF1502AS-15AC44 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, PCI bus interface logic, and legacy system emulation requiring stable component supply and long-term lifecycle support.
Supply support for ATF1502AS-15AC44 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 for industrial, automotive, and communications markets.
The ATF1502AS-15AC44 belongs to Atmel's ATF1500AS family of EEPROM-based CPLDs, designed specifically for replacing TTL/SSI/MSI logic in 5V systems with field-upgradable, secure, and pin-locked implementations.
FAQ
What is the operating temperature range for ATF1502AS-15AC44?
The ATF1502AS-15AC44 is specified for commercial temperature range: 0°C to +70°C ambient. It is not rated for industrial temperature operation (–40°C to +85°C), which applies only to the "L" variant (e.g., ATF1502ASL). This makes ATF1502AS-15AC44 ideal for office-environment test equipment and non-harsh industrial enclosures where thermal management is controlled.
Does ATF1502AS-15AC44 support in-system programming (ISP)?
Yes, ATF1502AS-15AC44 supports full IEEE 1149.1-compliant in-system programming via its dedicated 4-pin JTAG interface (TDI, TDO, TCK, TMS). ISP allows reprogramming while soldered on the PCB, enabling design iterations, firmware updates, and field repairs without device removal - a critical capability for maintaining legacy systems using ATF1502AS-15AC44.
Can ATF1502AS-15AC44 drive PCI bus signals directly?
Yes, ATF1502AS-15AC44 is explicitly PCI-compliant: it guarantees VOH ≥2.4 V at –2 mA and VOL ≤0.55 V at 3–6 mA under 5V operation, with low output-to-output skew. Its programmable high-drive outputs meet PCI Local Bus Specification Rev 2.2 requirements - eliminating need for external bus transceivers when interfacing with standard PCI slots using ATF1502AS-15AC44.
How many global clock inputs does ATF1502AS-15AC44 provide?
ATF1502AS-15AC44 provides three dedicated global clock inputs: GCLK1, GCLK2, and GCLK3. Each supports Input Transition Detection (ITD) for asynchronous edge capture and can be individually assigned as clock sources, output enables, or general-purpose inputs - enabling multi-domain timing control essential in complex state machines implemented with ATF1502AS-15AC44.
Is the ATF1502AS-15AC44 pin-compatible with other ATF1502AS variants?
Yes, all ATF1502AS variants - including ATF1502AS-10, ATF1502AS-15, and ATF1502AS-20 - share identical 44-pin TQFP and PLCC footprints and pinouts. Speed grades differ only in internal timing parameters (e.g., tPD, fCNT); thus, ATF1502AS-15AC44 can be substituted for slower variants without layout change, though timing closure must be re-verified in the target design.
ATF1502AS-15AC44 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 44-TQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Programmable Type:
- In System Programmable (min 10K program/erase cycles)
- Delay Time tpd(1) Max:
- 15 ns
- Voltage Supply - Internal:
- 4.75V ~ 5.25V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 32
- Number of Gates:
- -
- Number of I/O:
- 32
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-TQFP (10x10)
ATF1502AS-15AC44 FAQ
1.How can I place an order for ATF1502AS-15AC44 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1502AS-15AC44 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 ATF1502AS-15AC44 reliable?
The price and inventory of ATF1502AS-15AC44 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1502AS-15AC44 is usually 5 days.
3.What payment methods are accepted for ATF1502AS-15AC44?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1502AS-15AC44 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1502AS-15AC44?
ATF1502AS-15AC44 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1502AS-15AC44 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 ATF1502AS-15AC44?
For technical support, including ATF1502AS-15AC44 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1502AS-15AC44 requirements.
6.How does Aetrix verify that ATF1502AS-15AC44 is sourced from the original manufacturer or authorized distributors?
All ATF1502AS-15AC44 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 ATF1502AS-15AC44 meets industry standards.
7.What is the process for return or replacement of ATF1502AS-15AC44?
All ATF1502AS-15AC44 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1502AS-15AC44, 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 ATF1502AS-15AC44 part is unused and in its original packaging.
Return procedure for ATF1502AS-15AC44:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1502AS-15AC44 Tags
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5M40ZE64C5N
Intel
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ATF1502ASV-15AU44
Microchip Technology
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5M80ZE64C5N
Intel
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5M80ZT100C5N
Intel
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ATF1502AS-10AU44
Microchip Technology
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ATF1502AS-10JU44
Microchip Technology
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5M80ZE64I5N
Intel
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5M80ZT100I5N
Intel
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LC4032V-75TN48C
Lattice Semiconductor Corporation
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ATF1504ASV-15AU44
Microchip Technology
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ATF1504AS-10JU44
Microchip Technology
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5M160ZE64C5N
Intel
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