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Microchip Technology ATF1508AS-15AC100
- Part No.:
- ATF1508AS-15AC100
- Manufacturer:
- Microchip Technology
- Package:
- 100-TQFP
- Datasheet:
-
ATF1508AS-15AC100.pdf
- Description:
- IC CPLD 128MC 15NS 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,848
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Product details
Overview
ATF1508AS-15AC100 from Microchip Technology (formerly Atmel) is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 128 macrocells, 5 product terms per macrocell (expandable to 40), and 7.5 ns pin-to-pin delay. It operates up to 125 MHz in registered mode, supports 3.3 V or 5.0 V I/O, and features JTAG boundary-scan (IEEE 1149.1) and in-system programmability for embedded control logic in industrial PLCs and legacy interface bridging.
For engineers reviewing the ATF1508AS-15AC100 datasheet, ATF1508AS-15AC100 pinout, ATF1508AS-15AC100 application, or ATF1508AS-15AC100 equivalent, key selection criteria include its 100-lead TQFP package, PCI-compliant I/O drive strength, programmable slew rate, power-down mode via PD1/PD2 pins, and dual VCCINT/VCCIO supply architecture for mixed-voltage system integration.
Technical Context
The ATF1508AS-15AC100 implements a hierarchical routing architecture with global and regional buses: all 128 macrocell outputs and all I/O pins feed a global bus, while each macrocell generates a foldback term routed to a 16-macrocell regional bus. Its switch matrix selects up to 40 signals from the global bus per logic block, enabling high-fan-in sum-of-products logic with cascaded chains supporting up to 40 product terms.
Each macrocell integrates configurable flip-flop modes (D/T/JK/SR/latch), individual product-term clock enable, asynchronous reset/preset sourced from global signals or product terms, and combinatorial output with registered feedback - all programmable via JTAG ISP using BSDL-compliant tools. The device includes ITD circuits on global clocks, inputs, and I/O for input transition detection, and supports VCC power-up reset with selectable hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 128 macrocells - provides gate count equivalent to ~2000 usable PLD gates for medium-complexity glue logic replacement. |
| Pin-to-pin Delay | 7.5 ns - enables reliable operation in 125 MHz registered systems with timing closure at -15 speed grade. |
| I/O Voltage Support | 3.3 V or 5.0 V - dual VCCIO/VCCINT supplies allow interfacing with both modern low-voltage peripherals and legacy 5 V TTL/CMOS buses. |
| Power Management | Pin-controlled power-down (≤10 mA) and macrocell-level reduced-power bit - reduces dynamic and static current in idle or partial-logic-activity states. |
| JTAG Compliance | IEEE Std. 1149.1-1990 & 1149.1a-1993 - enables boundary-scan testing, in-system programming, and BSDL-based test vector generation. |
| PCI Compliance | Fully compliant with PCI DC/AC specifications - delivers required ±44 mA high-side and +206 mA low-side drive at 0.71 V for plug-and-play add-in card designs. |
| Security & Configuration | Programmable security fuse + 16-bit user signature - protects design IP while allowing traceable project identification without compromising configuration integrity. |
Pinout & Package
ATF1508AS-15AC100 is packaged in a 100-lead Thin Quad Flat Package (TQFP) with 0.5 mm pitch, RoHS-compliant, green (Pb/Halide-free) construction. Thermal pad exposed on underside for enhanced heat dissipation in industrial ambient conditions.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–25, 26–50, 51–75, 76–100 | Bi-directional I/O / Dedicated Input | 96 general-purpose I/O pins plus 4 dedicated inputs (GCLR, GCLK1–3, OE1/OE2); each can serve as global clock, reset, or output enable source per macrocell. |
| TCK, TMS, TDI, TDO | JTAG Test Access Port | Standard 4-pin IEEE 1149.1 interface for boundary-scan testing and in-system programming; TMS/TDI support internal pull-up option. |
| VCCIO (Pins 3, 16, 25, 42, 59, 76, 85, 98) | I/O Power Supply | Separate 3.3 V or 5.0 V supply for output drivers - decouples I/O voltage from core logic, enabling mixed-voltage board design. |
| VCCINT (Pins 47, 91) | Core Logic Power Supply | 5.0 V only supply for input buffers and internal logic - ensures compatibility with both 3.3 V and 5.0 V input signal levels. |
| GND (Pins 24, 41, 58, 75, 92) | Ground Reference | Five dedicated ground pins minimize noise coupling and improve signal integrity across high-speed I/O transitions. |
| PD1 (Pin 11), PD2 (Pin 44) | Power-down Control | Active-high pins that force device into ≤10 mA standby when asserted; disables logic activity but retains register and output states. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Slew Rate | Per-output control between slow (reduced EMI) and fast (timing-critical paths) switching - eliminates need for external series resistors. |
| Pin-keeper Circuits | Configurable on all inputs/I/Os to hold last-driven state when floating - prevents metastability, reduces system noise, and removes external pull-up/down requirements. |
| Combinatorial Output with Registered Feedback | Enables buried latch within same macrocell - supports dual-edge-triggered logic or state-holding functions without consuming extra macrocells. |
| Three Global Clock Pins (GCLK1–3) | Independent clock domains per macrocell group - allows synchronous logic partitioning and multi-clock domain design without external clock distribution. |
| Input Transition Detection (ITD) | Dedicated circuitry on global clocks, inputs, and I/O - detects asynchronous edges for wake-up, event capture, or glitch filtering without consuming macrocell resources. |
| VCC Power-up Reset Option | Hysteresis-selectable (Small/Large) reset threshold - ensures deterministic state machine initialization across varying power ramp profiles in industrial environments. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Bridging |
|---|---|
|
Use Scenario: Adding isolated digital I/O channels to modular PLC backplanes with mixed 3.3 V and 5 V sensor/actuator interfaces. IC Role / Device Role / Timing Role: Glue logic CPLD implementing address decoding, strobe synchronization, and level translation between CPU bus and peripheral modules. Use Value: 100-lead TQFP footprint fits dense PCB layouts; dual VCCIO/VCCINT enables seamless 3.3 V/5 V coexistence; PCI-compliant drive supports robust noise immunity in factory-floor EMI environments. |
Use Scenario: Translating between ISA, PC/104, or VMEbus protocols and modern microcontroller peripherals in retrofitted instrumentation. IC Role / Device Role / Timing Role: Protocol adapter CPLD performing handshaking, data width conversion (8/16-bit), and timing alignment for legacy parallel bus cycles. Use Value: 7.5 ns pin-to-pin delay meets tight ISA timing budgets; JTAG ISP allows field firmware updates without hardware modification; programmable slew rate suppresses crosstalk on long ribbon cables. |
| PCI Add-in Card Control Logic | Automated Test Equipment (ATE) Pattern Generator |
|
Use Scenario: Implementing IDSEL decoding, configuration space mapping, and interrupt arbitration logic on PCI-based measurement cards. IC Role / Device Role / Timing Role: PCI-compliant CPLD managing BAR decoding, command/status register access, and INTA#–INTD# routing per PCI specification. Use Value: Certified PCI DC/AC drive strength (±44 mA high-side, +206 mA low-side) ensures signal integrity at 33 MHz; boundary-scan support simplifies board-level validation and fault isolation. |
Use Scenario: Generating synchronized stimulus waveforms and capturing response data in high-channel-count ATE systems with precise timing alignment. IC Role / Device Role / Timing Role: High-speed pattern sequencer CPLD controlling DAC/ADC timing, multiplexing channel select lines, and latching pass/fail status bits. Use Value: 125 MHz registered operation supports sub-8 ns timing resolution; ITD circuits detect asynchronous trigger events; power-down mode reduces thermal load during idle test phases. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD-based glue logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XCR3256XL-10TQ144I | 256 macrocells, 10 ns delay, 3.3 V only, no VCCINT/VCCIO separation - higher density but lacks 5 V tolerance and mixed-supply flexibility. | Best suited for new 3.3 V-only designs requiring >128 macrocells; not drop-in for 5 V legacy interfaces or PCI slots. | Select when migrating from ATF1508AS-15AC100 to higher-density 3.3 V systems with no 5 V signal presence. |
| EPM7128SLC84-10 | 128 macrocells, 10 ns delay, 5 V only, non-JTAG ISP (requires UV erasure or parallel programming) - no in-system reprogrammability or boundary-scan. | Applicable only in cost-sensitive, static-function applications where field updates and testability are unnecessary. | Choose only for fixed-function, low-volume industrial controllers where JTAG ISP and PCI compliance are not required. |
Compared with XCR3256XL-10TQ144I and EPM7128SLC84-10, the ATF1508AS-15AC100 uniquely combines 5 V tolerance, dual-supply I/O, PCI compliance, and full JTAG ISP/BST in a 100-lead TQFP - making it irreplaceable for retrofitting legacy 5 V systems with field-upgradable, testable logic.
Availability
ATF1508AS-15AC100 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface bridging, PCI add-in card control logic, and automated test equipment pattern generation requiring stable component supply across extended product lifecycles.
Supply support for ATF1508AS-15AC100 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
Microchip Technology acquired Atmel in 2016 and maintains full support for the ATF1508AS family, including datasheets, BSDL models, and legacy programming tools - ensuring long-term reliability and documentation access.
The ATF1508AS series was designed for high-reliability, field-upgradable glue logic in industrial automation, test equipment, and PCI-compliant embedded systems - emphasizing in-system programmability, mixed-voltage interoperability, and robust ESD/latch-up immunity.
FAQ
What is the maximum operating frequency of the ATF1508AS-15AC100 in registered mode?
The ATF1508AS-15AC100 supports registered operation up to 125 MHz, verified at the -15 speed grade under industrial temperature conditions (–40°C to +85°C) with VCC = 5.0 V ±5%. This timing performance is achieved with its 7.5 ns pin-to-pin delay and optimized routing architecture. The ATF1508AS-15AC100 achieves this frequency while maintaining full JTAG boundary-scan functionality and PCI-compliant I/O drive.
Does the ATF1508AS-15AC100 support both 3.3 V and 5.0 V I/O signaling simultaneously?
Yes, the ATF1508AS-15AC100 supports simultaneous 3.3 V and 5.0 V I/O signaling via separate VCCIO and VCCINT supplies: VCCINT must be 5.0 V for core logic and input buffers (compatible with both 3.3 V and 5.0 V inputs), while VCCIO can be independently set to either 3.3 V or 5.0 V per bank to match connected peripherals. This dual-supply architecture is intrinsic to the ATF1508AS-15AC100 design and requires no external level shifters.
How does the power-down mode function on the ATF1508AS-15AC100?
The ATF1508AS-15AC100 enters power-down mode when either PD1 (Pin 11) or PD2 (Pin 44) is driven high, reducing supply current to ≤10 mA while latching all internal register states and output values. During power-down, input signals (except PD pins) are ignored, but pin-keeper circuits maintain I/O states to prevent floating. The ATF1508AS-15AC100 resumes full operation within 1 µs after PD pin returns low, with no loss of configuration.
Is the ATF1508AS-15AC100 compatible with PCI bus specifications?
Yes, the ATF1508AS-15AC100 is fully PCI-compliant per PCI Local Bus Specification Rev. 2.2, delivering certified drive strength: –44 mA high-side current at VOUT ≤ 1.4 V and +206 mA low-side current at VOUT = 0.71 V, with controlled slew rates (0.5–3.0 V/ns). Its 5.0 V VCCIO operation, 200 mA latch-up immunity, and 2000 V ESD protection meet PCI mechanical and electrical requirements - confirmed in the official ATF1508AS(L) datasheet Rev. 0784P.
Can the ATF1508AS-15AC100 be programmed in-system without removing it from the PCB?
Yes, the ATF1508AS-15AC100 supports full in-system programming (ISP) via its 4-pin JTAG interface (TCK/TMS/TDI/TDO), compliant with IEEE Std. 1149.1. Programming uses 5 V TTL-level signals and requires no UV exposure or socket removal. The ATF1508AS-15AC100 ships pre-erased and accepts SVF files generated by Microchip's ISP software or third-party tools - enabling field firmware updates and design iterations directly on assembled boards.
ATF1508AS-15AC100 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 100-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:
- 128
- Number of Gates:
- -
- Number of I/O:
- 80
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
ATF1508AS-15AC100 FAQ
1.How can I place an order for ATF1508AS-15AC100 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508AS-15AC100 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 ATF1508AS-15AC100 reliable?
The price and inventory of ATF1508AS-15AC100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508AS-15AC100 is usually 5 days.
3.What payment methods are accepted for ATF1508AS-15AC100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508AS-15AC100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508AS-15AC100?
ATF1508AS-15AC100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508AS-15AC100 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 ATF1508AS-15AC100?
For technical support, including ATF1508AS-15AC100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508AS-15AC100 requirements.
6.How does Aetrix verify that ATF1508AS-15AC100 is sourced from the original manufacturer or authorized distributors?
All ATF1508AS-15AC100 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 ATF1508AS-15AC100 meets industry standards.
7.What is the process for return or replacement of ATF1508AS-15AC100?
All ATF1508AS-15AC100 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508AS-15AC100, 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 ATF1508AS-15AC100 part is unused and in its original packaging.
Return procedure for ATF1508AS-15AC100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508AS-15AC100 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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