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Microchip Technology ATF1508AS-15QI100
- Part No.:
- ATF1508AS-15QI100
- Manufacturer:
- Microchip Technology
- Package:
- 100-BQFP
- Datasheet:
-
ATF1508AS-15QI100.pdf
- Description:
- IC CPLD 128MC 15NS 100QFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ATF1508AS-15QI100 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-based in-system programmability (ISP) and IEEE 1149.1 boundary-scan testing - used in PCI-compliant interface logic, industrial control state machines, and legacy TTL replacement.
For engineers reviewing the ATF1508AS-15QI100 datasheet, ATF1508AS-15QI100 pinout, ATF1508AS-15QI100 application, or ATF1508AS-15QI100 equivalent, key selection criteria include its 100-lead TQFP package, dual VCCINT/VCCIO power domains, programmable slew rate and open-collector outputs, PCI-compliant drive strength, and support for power-down via PD1/PD2 pins.
Technical Context
The ATF1508AS-15QI100 implements a flexible macrocell architecture with D/T/latch-configurable flip-flops, individual register control signals, and global clock inputs (GCLK1–GCLK3) with ITD (Input Transition Detection). Its enhanced routing includes a 40-signal global bus fed by all 128 macrocell feedbacks and I/O pins, plus regional foldback buses enabling up to 40-term cascade logic chains.
It integrates advanced power management: automatic 10 µA standby for "L" variants (not applicable here), pin-controlled 1 mA power-down mode, programmable pin-keeper circuits, and per-macrocell reduced-power bit. The device uses EEPROM-based nonvolatile configuration, supports security fuse locking, and provides two bytes of user-accessible signature data regardless of fuse state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 128 macrocells - enables integration of multiple TTL/SSI/MSI functions into single device |
| Pin-to-Pin Delay | 7.5 ns - ensures timing closure in high-speed control path designs up to 125 MHz |
| I/O Voltage Support | 3.3 V or 5.0 V - allows direct interfacing with mixed-voltage systems without level shifters |
| Power Supply Domains | VCCINT = 5.0 V only; VCCIO = 2.7–3.6 V or 4.75–5.25 V - decouples core logic from I/O drive requirements |
| JTAG Compliance | IEEE Std. 1149.1-1990 & 1149.1a-1993 - enables standardized boundary-scan test and ISP programming |
| PCI Compliance | Meets PCI DC/AC drive specs (e.g., VOH ≥ 2.4 V @ –2 mA, VOL ≤ 0.55 V @ 3–6 mA) - suitable for add-in card logic |
| Program/Erase Cycles | 10,000 cycles - supports field reprogramming and iterative design validation |
Pinout & Package
ATF1508AS-15QI100 is packaged in a 100-lead Thin Quad Flat Package (TQFP), RoHS-compliant, with 0.5 mm pitch and exposed thermal pad. Pinout follows standard TQFP top-view layout as documented in Atmel Rev. 0784P–PLD–7/05.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GCLK1, GCLK2, GCLK3 | Global Clock Input | Three dedicated low-skew clock inputs; each supports ITD for glitch-free asynchronous edge detection |
| GCLR | Global Clear Input | Asynchronous reset for all macrocell flip-flops; configurable per-macrocell as AR source |
| OE1, OE2 | Output Enable Inputs | Global output enable controls; polarity-selectable per macrocell via MOE multiplexer |
| PD1, PD2 | Power-down Control | Active-high pins enabling <10 mA standby; disable logic transitions while latching outputs and internal states |
| TCK, TMS, TDI, TDO | JTAG Test Access Port | IEEE 1149.1-compliant boundary-scan and ISP interface; TMS/TDI have optional internal pull-ups |
| VCCINT | Core Logic Supply | Must be connected to 5.0 V ±5%; powers input buffers and internal logic - not configurable for 3.3 V |
| VCCIO | I/O Drive Supply | Configurable for 3.3 V (2.7–3.6 V) or 5.0 V (4.75–5.25 V); sets output voltage swing and drive strength |
| I/Oxx | Bi-directional I/O | Up to 96 user-programmable I/Os; individually configurable as input, output, or bidirectional with slew control |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Slew Rate | Per-output control between slow (reduced EMI) and fast (timing-critical paths); default is slow |
| Open-Collector Output Option | Enables wired-OR interrupt signaling across multiple devices on shared bus lines |
| Pin-keeper Circuits | Prevents floating inputs/I/Os after release; eliminates need for external pull-up resistors and associated DC power loss |
| Buried Registered Feedback | Allows combinatorial output macrocells to retain registered feedback - increases effective logic density without extra pins |
| VCC Power-up Reset | Hysteresis-selectable (Small/Large); ensures deterministic state machine initialization at power-on |
| Security Fuse | One-time programmable fuse blocking readback of configuration; User Signature remains readable post-fuse |
Applications
| Industrial PLC I/O Expansion | PCI Add-in Card Logic |
|---|---|
|
Use Scenario: Replacing discrete TTL logic in modular I/O modules requiring deterministic timing and long-term configurability. IC Role / Device Role / Timing Role: CPLD implementing address decoding, status multiplexing, and handshake control with sub-10 ns propagation. Use Value: Eliminates board-level wiring changes during firmware updates; 128 macrocells support full module logic in one 100-TQFP package. |
Use Scenario: Providing glue logic on x86-compatible expansion cards needing PCI bus compliance and hot-plug readiness. IC Role / Device Role / Timing Role: Interface controller managing IDSEL decoding, parity generation, and command decode with PCI-spec drive strength. Use Value: Meets PCI VOL/VOH and AC current requirements natively; JTAG ISP enables field firmware patching without card removal. |
| Legacy System Emulation | Automated Test Equipment (ATE) Sequencing |
|
Use Scenario: Emulating obsolete PAL/GAL devices in avionics and medical equipment where redesign is prohibited. IC Role / Device Role / Timing Role: Pin-compatible logic replacement with identical setup/hold and propagation timing behavior. Use Value: 7.5 ns delay and 125 MHz registered operation match or exceed original GAL16V8/GAL22V10 performance envelopes. |
Use Scenario: Generating synchronized stimulus patterns and response capture windows in high-channel-count ATE platforms. IC Role / Device Role / Timing Role: State-machine sequencer controlling relay drivers, DAC triggers, and comparator sampling clocks. Use Value: Per-macrocell reduced-power bit and pin-controlled power-down minimize idle current in multi-device test racks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1508AS-10QI100 | 10 ns max pin-to-pin delay; lower speed grade; same 128-macrocell architecture and pinout | Suitable for cost-sensitive designs with relaxed timing margins (<100 MHz registered) | Select when system clock frequency ≤ 100 MHz and 7.5 ns delay is unnecessary - reduces cost without layout change |
| ATF1508ASL-15QI100 | "L" version with automatic 10 µA standby; identical speed and logic resources | Preferred for battery-powered or thermally constrained embedded controllers requiring ultra-low quiescent current | Choose only if standby current <15 µA is mandatory; note that ATF1508AS-15QI100 lacks auto-standby and requires explicit PD pin control |
Compared with ATF1508AS-15QI100, the -10QI100 trades 2.5 ns speed for lower unit cost in timing-tolerant systems, while the -15QI100L adds automatic ultra-low-power mode at no speed penalty - but requires different power sequencing and lacks pin-controlled power-down flexibility.
Availability
ATF1508AS-15QI100 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, PCI add-in card logic, legacy system emulation, and automated test equipment sequencing requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ATF1508AS-15QI100 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. The company specializes in microcontrollers, analog, FPGA/CPLD, and security ICs for industrial, automotive, and aerospace markets.
The ATF1508AS series was designed as a high-reliability, in-system programmable CPLD targeting legacy logic replacement, interface bridging, and control-intensive embedded applications where EEPROM-based nonvolatility and JTAG accessibility are critical.
FAQ
What is the operating temperature range for ATF1508AS-15QI100?
The ATF1508AS-15QI100 is rated for industrial temperature operation from –40°C to +85°C. This is confirmed in the DC and AC Operating Conditions table (page 14), where "Industrial" column specifies the full range. The "I" suffix in the part number explicitly denotes industrial-grade qualification, making ATF1508AS-15QI100 suitable for harsh environments including factory automation and outdoor infrastructure.
Does ATF1508AS-15QI100 support both 3.3 V and 5.0 V I/O simultaneously?
Yes, ATF1508AS-15QI100 supports mixed I/O voltages via separate power domains: VCCINT must be 5.0 V (±5%), while VCCIO can be independently set to either 3.3 V (2.7–3.6 V) or 5.0 V (4.75–5.25 V). This allows the device to interface with both 3.3 V peripherals and 5.0 V legacy buses on the same ATF1508AS-15QI100 board without level translators.
Can ATF1508AS-15QI100 be programmed in-system without removing it from the PCB?
Yes, ATF1508AS-15QI100 supports full in-system programmability (ISP) via its 4-pin JTAG interface compliant with IEEE Std. 1149.1. Programming is performed using 5 V TTL-level signals through TCK, TMS, TDI, and TDO pins - no socket or UV eraser required. The ATF1508AS-15QI100 ships erased and ready for first-time ISP.
What is the purpose of the PD1 and PD2 pins on ATF1508AS-15QI100?
PD1 and PD2 are dedicated active-high power-down control pins. When enabled in the design file and driven high, they reduce ATF1508AS-15QI100 supply current to <10 mA while latching all internal logic states and outputs. During power-down, inputs (except PD pins) are ignored, and pin-keeper circuits prevent floating - making ATF1508AS-15QI100 ideal for low-duty-cycle monitoring applications.
Is the ATF1508AS-15QI100 pin-compatible with other ATF1508AS package variants?
No - the ATF1508AS-15QI100 (100-lead TQFP) is not pin-compatible with the 84-lead PLCC or 160-lead PQFP variants. While logic resources and core functionality are identical, pin assignments differ significantly across packages (e.g., GCLK3 location, VCCIO count, I/O count). Migration requires PCB layout revision; only same-package speed grades (e.g., -10QI100) are drop-in replacements for ATF1508AS-15QI100.
ATF1508AS-15QI100 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:
- 4.5V ~ 5.5V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 128
- Number of Gates:
- -
- Number of I/O:
- 80
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-PQFP (14x20)
ATF1508AS-15QI100 FAQ
1.How can I place an order for ATF1508AS-15QI100 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508AS-15QI100 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-15QI100 reliable?
The price and inventory of ATF1508AS-15QI100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508AS-15QI100 is usually 5 days.
3.What payment methods are accepted for ATF1508AS-15QI100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508AS-15QI100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508AS-15QI100?
ATF1508AS-15QI100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508AS-15QI100 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-15QI100?
For technical support, including ATF1508AS-15QI100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508AS-15QI100 requirements.
6.How does Aetrix verify that ATF1508AS-15QI100 is sourced from the original manufacturer or authorized distributors?
All ATF1508AS-15QI100 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-15QI100 meets industry standards.
7.What is the process for return or replacement of ATF1508AS-15QI100?
All ATF1508AS-15QI100 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508AS-15QI100, 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-15QI100 part is unused and in its original packaging.
Return procedure for ATF1508AS-15QI100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508AS-15QI100 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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