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Microchip Technology ATF1508AS-15QC100
- Part No.:
- ATF1508AS-15QC100
- Manufacturer:
- Microchip Technology
- Package:
- 100-BQFP
- Datasheet:
-
ATF1508AS-15QC100.pdf
- Description:
- IC CPLD 128MC 15NS 100QFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,343
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Product details
Overview
ATF1508AS-15QC100 from Microchip (formerly Atmel) is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 128 macrocells, 5 product terms per macrocell (expandable to 40), 7.5 ns pin-to-pin delay, and support for 125 MHz registered operation. It features JTAG ISP, PCI compliance, 3.3V/5.0V I/O flexibility, and three global clock inputs - used in legacy industrial control logic consolidation and board-level glue logic replacement.
For engineers reviewing the ATF1508AS-15QC100 datasheet, ATF1508AS-15QC100 pinout, ATF1508AS-15QC100 application, or ATF1508AS-15QC100 equivalent, key selection criteria include its 100-pin TQFP package, dual VCCINT/VCCIO power domains, programmable slew rate per output, pin-keeper input retention, and JTAG boundary-scan testability per IEEE 1149.1a.
Technical Context
The ATF1508AS-15QC100 implements a hierarchical CPLD architecture with 128 macrocells organized into logic blocks, each fed by a 40-signal global bus and regional foldback bus. Its macrocell supports D/T/latch flip-flops, XOR-based arithmetic, buried registered feedback, and combinatorial outputs with registered feedback - enabling efficient state machine and wide-sum-term logic synthesis.
It integrates IEEE 1149.1a-compliant JTAG TAP controller for boundary-scan testing and in-system programming, plus dedicated PD1/PD2 pins for pin-controlled power-down (<10 mA). The device uses electrically-erasable EEPROM technology with 10,000 program/erase cycles, 20-year data retention, and 2000V ESD protection on all I/Os.
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 integration |
| Propagation Delay | 7.5 ns max pin-to-pin - enables reliable operation in 125 MHz registered designs with timing margin |
| Global Clock Inputs | Three dedicated GCLK pins - supports multi-domain synchronous logic with independent clock enable per macrocell |
| I/O Voltage Support | Separate VCCINT (5.0V only) and VCCIO (3.3V or 5.0V) - allows mixed-voltage board interfacing without level shifters |
| Power Management | Pin-controlled power-down (<10 mA) + automatic 10 µA standby ("L" variant) - reduces idle power in battery-backed or low-duty-cycle systems |
| JTAG Compliance | IEEE 1149.1-1990 / 1149.1a-1993 - enables production test, debug, and field firmware updates via standard 4-pin interface |
| PCI Compliance | Fully compliant with PCI DC/AC specs - supports direct connection to PCI bus signals without external drivers |
Pinout & Package
ATF1508AS-15QC100 is packaged in a 100-lead Thin Quad Flat Package (TQFP), RoHS-compliant, with 0.5 mm pitch and exposed thermal pad. Pin 1 is marked by dot or beveled corner; top-side marking includes "ATF1508AS-15QC100" and date code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–25, 26–50, 51–75, 76–100 | Bi-directional I/O or dedicated input | 96 configurable I/Os + 4 dedicated inputs (GCLR, OE1, OE2/GCLK2, GCLK1); each can drive TTL/CMOS loads or serve as global control signal |
| GCLK1, GCLK2, GCLK3 | Global clock input | Three asynchronous clock sources - selectable per macrocell as register clock or product-term clock enable |
| PD1, PD2 | Power-down control | Active-high pins that force device into <10 mA power-down mode; disable logic transitions but retain output states and internal latches |
| TCK, TMS, TDI, TDO | JTAG boundary-scan interface | Standard 4-pin IEEE 1149.1 interface - supports ISP programming, BSDL-based test, and real-time debug without removing device from PCB |
| VCCINT | Core logic supply | Must be connected to 5.0V ±5% - powers input buffers and internal logic; compatible with 3.3V/5.0V input levels |
| VCCIO | I/O driver supply | Configurable for 3.3V (2.7–3.6V) or 5.0V (4.75–5.25V) - sets output voltage swing and drive strength independently of core logic |
| GND | Ground reference | Multiple ground pins distributed across package - required for noise suppression and stable I/O switching performance |
Key Features
| Feature | Design Value |
|---|---|
| Programmable slew rate per output | Enables system-level EMI reduction by slowing non-critical outputs; defaults to slow, configurable to fast in design file |
| Pin-keeper circuitry | Prevents floating inputs/I/Os from drifting to indeterminate voltage - eliminates need for external pull-ups and reduces leakage current |
| Buried registered feedback | Allows combinatorial macrocell outputs to feed back registered signals internally - increases logic density without consuming extra I/O pins |
| Security fuse | One-time programmable fuse blocks unauthorized read-back of configuration bitstream while preserving User Signature access |
| VCC power-up reset | Hysteresis-configurable reset ensures deterministic state-machine initialization at power-on; supports both small and large reset thresholds |
| Open-collector output option | Per-macrocell configurable open-drain mode - enables wired-OR interrupt signaling and shared-bus arbitration |
Applications
| Industrial PLC Backplane Logic | Legacy System Glue Logic Replacement |
|---|---|
Use Scenario: Replacing discrete TTL/SSI logic on programmable logic controller backplanes handling sensor input aggregation and relay output control. IC Role / Device Role / Timing Role: Configurable combinational and registered logic engine implementing address decoding, status multiplexing, and synchronized output latching. Use Value: Reduces component count by >80% vs. discrete logic; maintains 7.5 ns timing integrity across 125 MHz control loops with no layout changes. |
Use Scenario: Modernizing aging telecom line cards where obsolete PAL/GAL devices require drop-in functional equivalents with identical pinout and timing. IC Role / Device Role / Timing Role: Pin-compatible CPLD substitute supporting same JEDEC fuse map migration path and JTAG reprogramming infrastructure. Use Value: Enables continued production using existing PCBs and test fixtures; leverages ISP to update field-deployed units without hardware modification. |
| PCI Bus Interface Logic | Automated Test Equipment (ATE) Pattern Generator |
Use Scenario: Implementing protocol-aware handshaking, address filtering, and burst-mode control logic directly on PCI add-in cards. IC Role / Device Role / Timing Role: PCI-compliant I/O driver and control sequencer - meets PCI DC/AC specs including VOL ≤0.55V at 6 mA and IOH ≥−44 mA at 1.4V. Use Value: Eliminates external PCI buffer ICs; supports hot-plug detection and error signaling via programmable open-collector outputs. |
Use Scenario: Generating precise, multi-phase stimulus waveforms for semiconductor wafer probing and board-level functional test. IC Role / Device Role / Timing Role: High-speed pattern generator with deterministic 7.5 ns propagation and three independent global clocks for skew-controlled waveform edges. Use Value: Achieves sub-10 ns edge placement accuracy; programmable slew rate minimizes overshoot on high-frequency test vectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1508AS-10QC100 | 10 ns propagation delay (vs. 7.5 ns); same 128-macrocell architecture and pinout | Suitable for lower-speed designs where timing margin is relaxed; consumes less dynamic power at equivalent frequency | Select when target system clock ≤100 MHz and cost sensitivity outweighs need for maximum speed headroom |
| ATF1508ASL-15QC100 | Low-power "L" variant with 10 µA standby current (vs. 1 mA in standard version); identical AC timing and pinout | Preferred for battery-powered or thermally constrained environments requiring ultra-low quiescent current during idle periods | Choose when system duty cycle is low and standby power budget is <50 µA; note: same 7.5 ns delay preserved |
Compared with ATF1508AS-10QC100 and ATF1508ASL-15QC100, the ATF1508AS-15QC100 delivers the highest speed grade in the family while maintaining full pin and functional compatibility - making it the optimal choice for timing-critical upgrades where existing layouts must be retained.
Availability
ATF1508AS-15QC100 is available at Aetrix Electronics and suitable for industrial PLC backplane logic, PCI interface design, and legacy system glue logic replacement requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ATF1508AS-15QC100 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 continues to support the ATF1508AS family as part of its legacy CPLD portfolio, emphasizing reliability, long-term availability, and industrial temperature range assurance.
The ATF1508AS series was designed for high-reliability, medium-complexity digital logic integration in industrial automation, communications infrastructure, and test equipment - prioritizing in-system programmability, mixed-voltage I/O, and robust power management over raw density.
FAQ
What is the maximum operating frequency of the ATF1508AS-15QC100?
The ATF1508AS-15QC100 supports registered operation up to 125 MHz, verified under worst-case conditions (100°C, VCC = 4.75V). This is enabled by its 7.5 ns maximum pin-to-pin delay and optimized routing architecture. The actual achievable frequency depends on design complexity and placement - the ATF1508AS-15QC100 compiler reports timing closure against this spec during fitting.
Does the ATF1508AS-15QC100 support both 3.3V and 5.0V I/O operation?
Yes, the ATF1508AS-15QC100 supports dual-voltage I/O via separate VCCIO and VCCINT supplies: VCCINT must be 5.0V for core logic, while VCCIO can be set to either 3.3V (2.7–3.6V) or 5.0V (4.75–5.25V). This allows the ATF1508AS-15QC100 to interface directly with both 3.3V and 5.0V subsystems without external level shifters.
How does the pin-keeper feature work on the ATF1508AS-15QC100?
The ATF1508AS-15QC100's pin-keeper circuitry holds the last driven logic state (high or low) on configured inputs and I/Os when they become high-impedance - preventing floating nodes, reducing system noise, and eliminating external pull-up resistors. It is enabled per-pin via configuration bitstream and remains active during JTAG programming and power-down modes.
Can the ATF1508AS-15QC100 be programmed in-system after soldering to the PCB?
Yes, the ATF1508AS-15QC100 is fully in-system programmable (ISP) via its IEEE 1149.1-compliant 4-pin JTAG interface (TCK, TMS, TDI, TDO). No socket or programming adapter is needed - the ATF1508AS-15QC100 can be configured, verified, and reprogrammed directly on the assembled board using standard SVF files and Microchip's programming tools.
What is the purpose of the PD1 and PD2 pins on the ATF1508AS-15QC100?
The PD1 and PD2 pins on the ATF1508AS-15QC100 provide pin-controlled power-down: when either pin is driven high, the device enters a low-power state drawing <10 mA while retaining all register and output states. This feature is enabled in the design source file; once activated, PD1/PD2 cannot serve as logic I/O but still support buried cascade logic generation.
ATF1508AS-15QC100 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 100-BQFP
- 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-PQFP (14x20)
ATF1508AS-15QC100 FAQ
1.How can I place an order for ATF1508AS-15QC100 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508AS-15QC100 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-15QC100 reliable?
The price and inventory of ATF1508AS-15QC100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508AS-15QC100 is usually 5 days.
3.What payment methods are accepted for ATF1508AS-15QC100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508AS-15QC100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508AS-15QC100?
ATF1508AS-15QC100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508AS-15QC100 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-15QC100?
For technical support, including ATF1508AS-15QC100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508AS-15QC100 requirements.
6.How does Aetrix verify that ATF1508AS-15QC100 is sourced from the original manufacturer or authorized distributors?
All ATF1508AS-15QC100 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-15QC100 meets industry standards.
7.What is the process for return or replacement of ATF1508AS-15QC100?
All ATF1508AS-15QC100 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508AS-15QC100, 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-15QC100 part is unused and in its original packaging.
Return procedure for ATF1508AS-15QC100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508AS-15QC100 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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