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Microchip Technology ATF1502AS-15JI
- Part No.:
- ATF1502AS-15JI
- Manufacturer:
- Microchip Technology
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
ATF1502AS-15JI.pdf
- Description:
- IC CPLD 32MC 15NS 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,840
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Product details
Overview
ATF1502AS-15JI 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 and supports in-system programming via JTAG for field reconfiguration in industrial control and PCI-compliant interface applications.
For engineers reviewing the ATF1502AS-15JI datasheet, ATF1502AS-15JI pinout, ATF1502AS-15JI application, or ATF1502AS-15JI equivalent, key selection considerations include its 125 MHz registered clock frequency, JTAG boundary-scan compliance (IEEE 1149.1a), PCI-compatible 5V I/O drive capability, programmable slew rate per output, and dual standby modes (10 µA auto-standby and 1 mA pin-controlled).
Technical Context
The ATF1502AS-15JI implements a flexible macrocell architecture with five sections per macrocell: product term array with 5 base terms (expandable via cascade logic), OR/XOR/CASCADE logic block supporting up to 40-term sum-of-products, D/T-latch-configurable flip-flop with global/individual clock and reset control, output select/enable with programmable open-collector and slew rate, and logic array inputs fed by a 40-signal global bus. Its routing includes enhanced feedback paths, alternate input routing, and foldback logic on regional buses.
It features three global clock pins (GCLK1–GCLK3), Input Transition Detection (ITD) circuits on global clocks, inputs, and I/Os, fast registered input from product term, VCC power-up reset with selectable hysteresis, and JTAG-based ISP with BSDL support. The device supports PCI electrical compliance with programmable high-drive outputs and low skew, while maintaining full boundary-scan testability without TRST pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 32 macrocells - provides gate count equivalent to ~1500 usable gates for integrating multiple SSI/MSI functions |
| Max Pin-to-pin Delay | 7.5 ns - enables reliable timing closure for 133 MHz system clocks in combinatorial paths |
| Registered Clock Frequency | 125 MHz - supports high-speed synchronous logic such as state machines and data path controllers |
| I/O Count | Up to 32 bidirectional I/O + 4 dedicated inputs - allows flexible pin assignment for mixed signal/control interfaces |
| Power Management | 10 µA auto-standby (L version) and 1 mA pin-controlled standby - reduces quiescent current during idle periods without firmware intervention |
| JTAG Compliance | IEEE Std. 1149.1-1990 and 1149.1a-1993 - ensures interoperability with standard boundary-scan test equipment and ISP tools |
| PCI Compatibility | Meets PCI DC/AC specs including VOH ≥2.4 V @ -2 mA, VOL ≤0.55 V @ 3–6 mA - enables direct connection to PCI bus without level-shifting |
Pinout & Package
ATF1502AS-15JI is housed in a 44-lead Thin Quad Flat Package (TQFP), RoHS-compliant, with 0.8 mm lead pitch and exposed thermal pad. Package dimensions: 10 mm × 10 mm × 1.4 mm.
| 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 | Configurable as bidirectional I/O, input-only, or global control (GCLR, OE1, GCLK1–GCLK3); unused pins default to high-Z |
| 44 | TDI/I/O | JTAG Test Data In; when JTAG disabled, functions as general-purpose I/O with buried feedback capability |
| 3 | TMS/I/O | JTAG Test Mode Select; pull-up option available; serves as I/O when JTAG not enabled |
| 41 | TDO/I/O | JTAG Test Data Out; open-drain capable; retains macrocell resources even when used for BST |
| 20 | TCK/I/O | JTAG Test Clock; edge-triggered; supports 10 MHz+ boundary-scan clock rates |
| 12, 13 | PD1/I/O, PD2/I/O | Pin-controlled power-down inputs; when asserted high, reduce ICC to <1 mA; macrocell logic remains accessible for foldback |
| 11, 22, 37 | GCLK1/I, GCLK2/OE2/I, GCLK3/I/O | Global clock inputs; each can drive all 32 macrocells; GCLK2 doubles as output enable; GCLK3 supports I/O feedback |
| 14 | GCLR/I | Global asynchronous clear; active-low; can be OR'd with product term for conditional reset |
| 15 | OE1/I | Global output enable; true/complement selectable per macrocell; enables tri-state control of multiple outputs |
Key Features
| Feature | Design Value |
|---|---|
| In-System Programmability (ISP) | Full JTAG-based reprogramming in-circuit without removal; supports SVF files for ATE integration |
| Programmable Slew Rate | Per-output control between fast (1–5 V/ns) and slow (9–12 ns enable/disable) switching to minimize EMI in noise-sensitive systems |
| Pin-keeper Circuits | Prevents floating inputs/I/Os by latching last driven state; eliminates need for external pull-ups and associated DC power loss |
| Security Fuse | One-time programmable fuse blocks unauthorized read-back of configuration; 16-bit User Signature remains readable for traceability |
| Reduced-power Macrocell Option | Individual macrocell power-down bit adds tRPA (10–15 ns) to AC parameters but cuts dynamic current per cell significantly |
| VCC Power-up Reset | Hysteresis-selectable (Small/Large) reset at VRST; ensures deterministic register initialization for FSMs without external reset IC |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Adapter |
|---|---|
Use Scenario: Replacing discrete TTL logic in programmable logic controller backplanes to consolidate address decoding, strobe generation, and status multiplexing. IC Role / Device Role / Timing Role: CPLD acting as glue logic hub with registered outputs synchronized to 25 MHz system clock and combinatorial address decode paths. Use Value: Reduces board space by >60% vs. 74-series chips; enables field-upgradable logic via JTAG without hardware change. |
Use Scenario: Bridging ISA or VME bus signals to modern microcontroller peripherals using protocol translation and timing adjustment. IC Role / Device Role / Timing Role: Timing-critical interface translator with programmable setup/hold compensation and PCI-compliant 5V drive strength. Use Value: Eliminates need for external bus transceivers; meets PCI VOL ≤0.55 V at 6 mA load without external termination. |
| PCI Slot Configuration Logic | Automated Test Equipment (ATE) Pattern Generator |
Use Scenario: Implementing IDSEL decoding, command decoding, and interrupt arbitration in add-in PCI cards for embedded instrumentation. IC Role / Device Role / Timing Role: Configurable control logic with three global clocks for independent timing domains (address, data, control). Use Value: Supports hot-plug detection via ITD on GCLK pins; enables secure configuration lock via security fuse to prevent tampering. |
Use Scenario: Generating precise stimulus waveforms and capture timing for digital IC validation using internal state machines. IC Role / Device Role / Timing Role: High-speed pattern sequencer with 125 MHz registered outputs and programmable output enable for glitch-free vector transitions. Use Value: Achieves sub-8 ns timing resolution; uses buried feedback to implement deep pipeline stages without external registers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XCR3064XL-10VQG44C | 64 macrocells, 3.3V core, 10 ns propagation; no PCI 5V drive; requires level-shifting for legacy bus interfacing | Suitable for new 3.3V designs with higher density needs; not drop-in for 5V PCI slots | Select when migrating to lower-voltage systems and requiring >32 macrocells; verify I/O voltage compatibility. |
| EPM3064ATC44-10 | 64 macrocells, 5V supply, 10 ns speed grade; lacks ITD, pin-keeper, and programmable slew; no PCI-specific drive characterization | Better for cost-sensitive 5V applications where advanced power management is unnecessary | Choose for simple replacement where JTAG ISP and PCI compliance are not required; expect higher static current than ATF1502AS-15JI. |
Compared with XCR3064XL-10VQG44C and EPM3064ATC44-10, the ATF1502AS-15JI uniquely delivers PCI-compliant 5V I/O, integrated ITD for low-power wake-on-event, and per-pin slew control-making it optimal for retrofitting legacy industrial interfaces without board redesign.
Availability
ATF1502AS-15JI is available at Aetrix Electronics and suitable for industrial automation, PCI add-in card manufacturing, and legacy bus interface design requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ATF1502AS-15JI 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 (now part of Microchip Technology) is a semiconductor manufacturer specializing in non-volatile memory, microcontrollers, and programmable logic devices with emphasis on industrial and automotive reliability.
The ATF1502AS family was designed for high-reliability, in-system reprogrammable logic in 5V industrial environments-targeting applications where PCI compatibility, JTAG testability, and low-power standby are critical.
FAQ
What is the maximum operating frequency of the ATF1502AS-15JI in registered mode?
The ATF1502AS-15JI supports registered operation up to 125 MHz, as confirmed by its fCNT parameter (maximum internal global clock frequency) at the -15 speed grade. This value is measured under standard conditions (VCC = 5.0 V, TA = 25°C) and assumes proper PCB layout and load capacitance (≤35 pF). The ATF1502AS-15JI achieves this performance using three global clock inputs with low-skew distribution across all 32 macrocells.
Does the ATF1502AS-15JI support PCI bus interfacing without external level shifters?
Yes, the ATF1502AS-15JI is explicitly PCI-compliant per its datasheet specifications: VOH ≥2.4 V at -2 mA, VOL ≤0.55 V at 3–6 mA, and meets PCI AC drive requirements including IOH(AC) and IOL(AC) curves. Its 5V-tolerant I/O structure and programmable high-drive mode allow direct connection to PCI slots without external buffers or level translators. The ATF1502AS-15JI maintains this compliance across its full industrial temperature range (-40°C to +85°C).
How does the pin-keeper feature function on the ATF1502AS-15JI, and what design benefit does it provide?
The ATF1502AS-15JI's programmable pin-keeper circuit latches the last driven logic state (high or low) on any input or I/O pin when left floating, preventing indeterminate voltage levels that cause shoot-through current and EMI. This eliminates the need for external pull-up/pull-down resistors and their associated DC power loss-critical in battery-powered or thermally constrained systems. The ATF1502AS-15JI implements this at the silicon level with no user logic resource consumption.
Can the ATF1502AS-15JI be programmed in-system, and what interface is required?
Yes, the ATF1502AS-15JI supports full in-system programming (ISP) via the IEEE 1149.1 JTAG interface using four dedicated pins: TDI, TDO, TMS, and TCK. Programming can be performed with Atmel-provided tools or third-party SVF-compatible programmers without removing the device from the PCB. When JTAG is disabled in the design, those four pins revert to general-purpose I/O, preserving all macrocell functionality-including buried feedback-on those pins. The ATF1502AS-15JI ships pre-erased and ready for first-time ISP.
What power-saving modes are available on the ATF1502AS-15JI, and how are they activated?
The ATF1502AS-15JI offers three distinct power-saving modes: (1) automatic 10 µA standby (L-version only), (2) pin-controlled 1 mA standby via PD1/PD2 inputs, and (3) per-macrocell reduced-power mode activated by compiler-generated bits. The PD1/PD2 mode is enabled in the design source file; asserting either pin high latches internal states and holds outputs valid while blocking all other inputs. The ATF1502AS-15JI maintains full boundary-scan and ISP capability even in standby modes.
ATF1502AS-15JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 4.5V ~ 5.5V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 32
- Number of Gates:
- -
- Number of I/O:
- 32
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
ATF1502AS-15JI FAQ
1.How can I place an order for ATF1502AS-15JI through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1502AS-15JI 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-15JI reliable?
The price and inventory of ATF1502AS-15JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1502AS-15JI is usually 5 days.
3.What payment methods are accepted for ATF1502AS-15JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1502AS-15JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1502AS-15JI?
ATF1502AS-15JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1502AS-15JI 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-15JI?
For technical support, including ATF1502AS-15JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1502AS-15JI requirements.
6.How does Aetrix verify that ATF1502AS-15JI is sourced from the original manufacturer or authorized distributors?
All ATF1502AS-15JI 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-15JI meets industry standards.
7.What is the process for return or replacement of ATF1502AS-15JI?
All ATF1502AS-15JI units undergo pre-shipment inspection (PSI). If there is an issue with ATF1502AS-15JI, 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-15JI part is unused and in its original packaging.
Return procedure for ATF1502AS-15JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1502AS-15JI 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
-
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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