My Inquiry
My Account
Microchip Technology ATF1508ASL-20QC100
- Part No.:
- ATF1508ASL-20QC100
- Manufacturer:
- Microchip Technology
- Package:
- 100-BQFP
- Datasheet:
-
ATF1508ASL-20QC100.pdf
- Description:
- IC CPLD 128MC 20NS 100QFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,098
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ATF1508ASL-20QC100 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), 7.5 ns pin-to-pin delay, and support for registered operation up to 125 MHz. It features three global clock inputs, JTAG boundary-scan (IEEE 1149.1), in-system programmability, and PCI-compliant I/O drivers - deployed in industrial control logic, legacy bus interface adaptation, and reconfigurable glue logic.
For engineers reviewing the ATF1508ASL-20QC100 datasheet, ATF1508ASL-20QC100 pinout, ATF1508ASL-20QC100 application, or ATF1508ASL-20QC100 equivalent, key selection criteria include its 100-lead TQFP package, 5 V core supply with 3.3/5.0 V I/O flexibility, automatic 10 µA standby power-down ("L" version), security fuse protection, and dual power-down pins (PD1/PD2) enabling system-level low-power sequencing.
Technical Context
The ATF1508ASL-20QC100 implements a hierarchical routing architecture with a global bus feeding all 128 macrocells and regional foldback buses supporting up to 21-product-term sum terms. Each macrocell integrates OR/XOR/cascade logic, a configurable D/T/latch flip-flop, and programmable output enable/slew rate/open-collector options.
It supports IEEE 1149.1 boundary-scan testing via dedicated TDI/TDO/TCK/TMS pins, includes Input Transition Detection (ITD) circuits on global clocks and I/Os, and enables buried registered feedback within combinatorial outputs - allowing dual-latch behavior per macrocell without consuming additional resources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 128 macrocells - provides gate count equivalent to ~2000 usable PLD gates for medium-complexity state machines and bus controllers. |
| Pin-to-pin Delay | 7.5 ns - enables reliable operation in 125 MHz registered logic paths with sufficient timing margin for PCB trace delays. |
| Global Clock Inputs | Three dedicated GCLK pins (GCLK1–GCLK3) - allows independent clock domains for multi-rate subsystems without external muxing. |
| I/O Voltage Support | 3.3 V or 5.0 V I/O with separate VCCIO/VCCINT rails - permits mixed-voltage interfacing (e.g., 3.3 V FPGA ↔ 5 V legacy peripherals). |
| Power Management | Automatic 10 µA standby (L-version) + pin-controlled 1 mA power-down - reduces idle current by >99% vs. active mode for battery-backed systems. |
| JTAG Compliance | IEEE Std. 1149.1-1990 / 1149.1a-1993 - enables production test coverage, in-circuit debugging, and field firmware updates without physical device removal. |
| PCI Compliance | Fully compliant with PCI DC/AC specifications - delivers ±44 mA high-current drive and meets VOL ≤ 0.55 V @ 3 mA for direct attachment to PCI slots. |
Pinout & Package
ATF1508ASL-20QC100 is housed in a 100-lead Thin Quad Flat Package (TQFP) with 0.5 mm pitch, RoHS-compliant, and rated for industrial temperature range (−40°C to +85°C). The package exposes 96 bi-directional I/O pins plus four dedicated input pins (GCLR, OE1, OE2, GCLK3), two power-down pins (PD1, PD2), and standard JTAG signals.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–25, 26–50, 51–75, 76–100 | Bi-directional I/O / Dedicated Input | Configurable as input, output, or bidirectional; dedicated pins (e.g., GCLR, OE1, GCLK1–GCLK3) serve global control functions per macrocell. |
| TCK, TMS, TDI, TDO | JTAG Test Access Port | Enable boundary-scan testing and in-system programming; TMS/TDI include optional internal pull-up for robust initialization. |
| PD1, PD2 | Power-down Control Inputs | Assert high to enter sub-10 mA power-down mode; latches internal state and holds outputs while blocking all non-PD inputs. |
| VCCINT | Core Logic Supply | Must be connected to 5.0 V ±5%; powers input buffers and internal logic - compatible with both 3.3 V and 5.0 V input levels. |
| VCCIO | I/O Driver 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 independently of core logic. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Pin-keeper | Prevents floating inputs/I/Os by retaining last driven state - eliminates need for external pull-ups and reduces system noise and leakage current. |
| Reduced-power Macrocell Bit | Per-macrocell power gating cuts dynamic current consumption; enables fine-grained optimization in partial-activity applications. |
| Buried Registered Feedback | Allows combinatorial output macrocells to generate registered feedback internally - supports dual-latch functionality without extra macrocell usage. |
| Input Transition Detection (ITD) | Detects edges on global clocks, inputs, and I/Os - enables low-latency event capture and asynchronous wake-up without CPU polling. |
| Security Fuse + User Signature | One-time programmable fuse blocks readback of configuration; 16-bit user-accessible signature space stores revision, project ID, or date. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Protocol Translation |
|---|---|
|
Use Scenario: Adding isolated digital I/O channels to a modular PLC rack using 24 V DC sensors and actuators. IC Role / Device Role / Timing Role: Glue logic CPLD implementing level-shifting, debounce filtering, and parallel-to-serial conversion for microcontroller communication. Use Value: Enables deterministic 7.5 ns response time for safety-critical inputs and leverages PD1/PD2 for selective module sleep during idle cycles. |
Use Scenario: Bridging ISA-bus peripherals to modern embedded controllers in medical diagnostic equipment. IC Role / Device Role / Timing Role: Address decoder, strobe synchronizer, and bus arbitration controller with PCI-compliant drive strength. Use Value: Delivers 3 mA sink / −4 mA source at 0.55 V VOL to meet ISA timing margins while supporting hot-plug detection via ITD circuits. |
| Reconfigurable Sensor Interface | Field-Upgradeable Communication Gateway |
|
Use Scenario: Adapting multiple sensor protocols (SPI, I²C, parallel) to a unified UART/USB host in environmental monitoring nodes. IC Role / Device Role / Timing Role: Protocol state machine executor and signal multiplexer with programmable slew rate to reduce EMI on long sensor traces. Use Value: Uses buried feedback to implement synchronous FIFO pointers and open-collector outputs for wired-AND interrupt aggregation. |
Use Scenario: Enabling firmware-upgradable protocol stacks (Modbus RTU, CANopen, BACnet MS/TP) in building automation gateways. IC Role / Device Role / Timing Role: Reconfigurable packet parser, CRC generator, and physical-layer handshaking logic with JTAG ISP for zero-downtime updates. Use Value: Security fuse prevents reverse-engineering of proprietary protocol logic; User Signature stores firmware version for field validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD-based logic integration applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XCR3256XL-10TQ144I | 256 macrocells, 10 ns delay, 3.3 V only, no VCCINT/VCCIO separation | Lacks 5 V tolerance and PCI compliance; requires level shifters for legacy 5 V bus interfacing | Preferred when higher density and lower static power are required, and system operates exclusively at 3.3 V. |
| EPM7128SLC84-10 | 128 macrocells, 10 ns delay, 5 V-only, no JTAG ISP (requires UV erasure) | No in-system programmability; lacks power-down pins and pin-keeper circuitry | Suitable for cost-sensitive, fixed-function designs where field updates are unnecessary and 5 V-only operation is acceptable. |
Compared with XCR3256XL-10TQ144I and EPM7128SLC84-10, the ATF1508ASL-20QC100 uniquely combines 5 V-tolerant I/O, PCI compliance, automatic low-power standby, and JTAG-based field reprogrammability - making it optimal for industrial retrofit and mixed-voltage legacy interface applications.
Availability
ATF1508ASL-20QC100 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus protocol translation, and reconfigurable sensor interface applications requiring stable component supply across extended lifecycle commitments.
Supply support for ATF1508ASL-20QC100 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(L) family, including datasheets, design tools, and long-term manufacturing commitment.
The ATF1508AS(L) series was designed for industrial-grade reconfigurable logic in space-constrained, mixed-voltage environments - targeting replacement of TTL/SSI/MSI logic and classic PLDs in control, instrumentation, and communications infrastructure.
FAQ
What is the operating temperature range for the ATF1508ASL-20QC100?
The ATF1508ASL-20QC100 is rated for industrial temperature operation from −40°C to +85°C. This specification is guaranteed across all electrical parameters including timing, power consumption, and I/O drive strength - validated per the official Microchip datasheet Rev. 0784P–PLD–7/05. The "L" suffix explicitly denotes the low-power industrial-grade variant of the ATF1508AS family.
Does the ATF1508ASL-20QC100 support in-system programming (ISP)?
Yes, the ATF1508ASL-20QC100 supports full in-system programming via its 4-pin JTAG interface compliant with IEEE Std. 1149.1. Programming can be performed without removing the device from the PCB using SVF files, Atmel ISP software, or third-party ATE tools. The ATF1508ASL-20QC100 ships erased and ready for ISP, with JTAG pins (TCK/TMS/TDI/TDO) configurable as general-purpose I/O if unused.
How does the power-down feature work on the ATF1508ASL-20QC100?
The ATF1508ASL-20QC100 supports pin-controlled power-down via PD1 and/or PD2 inputs. When enabled in the design file and asserted high, the device enters a sub-10 mA state while latching all internal registers and output states. Inputs (except PD pins) are blocked, and pin-keeper circuits maintain I/O levels. Recovery occurs within 1 µs after PD goes low - confirmed in the Power-down AC Characteristics table of the datasheet.
Can the ATF1508ASL-20QC100 interface directly with PCI bus signals?
Yes, the ATF1508ASL-20QC100 is fully PCI-compliant per PCI Local Bus Specification Rev. 2.2. It meets required DC characteristics (VOL ≤ 0.55 V @ 3 mA, VOH ≥ 2.4 V @ −2 mA) and AC drive strength (±44 mA switching current), with built-in 5 V-tolerant I/O and programmable slew rate to manage signal integrity on shared bus lines.
What packaging and lead finish does the ATF1508ASL-20QC100 use?
The ATF1508ASL-20QC100 uses a 100-lead Thin Quad Flat Package (TQFP) with 0.5 mm pitch and Pb/Halide-free (RoHS-compliant) matte tin lead finish. The "QC" in the part number explicitly denotes this TQFP variant - distinct from PLCC (QC), PQFP (QI), or other package options in the ATF1508AS(L) family.
ATF1508ASL-20QC100 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:
- 20 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)
ATF1508ASL-20QC100 FAQ
1.How can I place an order for ATF1508ASL-20QC100 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508ASL-20QC100 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 ATF1508ASL-20QC100 reliable?
The price and inventory of ATF1508ASL-20QC100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508ASL-20QC100 is usually 5 days.
3.What payment methods are accepted for ATF1508ASL-20QC100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508ASL-20QC100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508ASL-20QC100?
ATF1508ASL-20QC100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508ASL-20QC100 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 ATF1508ASL-20QC100?
For technical support, including ATF1508ASL-20QC100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508ASL-20QC100 requirements.
6.How does Aetrix verify that ATF1508ASL-20QC100 is sourced from the original manufacturer or authorized distributors?
All ATF1508ASL-20QC100 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 ATF1508ASL-20QC100 meets industry standards.
7.What is the process for return or replacement of ATF1508ASL-20QC100?
All ATF1508ASL-20QC100 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508ASL-20QC100, 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 ATF1508ASL-20QC100 part is unused and in its original packaging.
Return procedure for ATF1508ASL-20QC100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508ASL-20QC100 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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
