My Inquiry
My Account
Microchip Technology ATF1508ASL-25QI100
- Part No.:
- ATF1508ASL-25QI100
- Manufacturer:
- Microchip Technology
- Package:
- 100-BQFP
- Datasheet:
-
ATF1508ASL-25QI100.pdf
- Description:
- IC CPLD 128MC 25NS 100QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,662
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ATF1508ASL-25QI100 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 operates across industrial temperature range (–40°C to +85°C) in a 100-lead TQFP package.
For engineers reviewing the ATF1508ASL-25QI100 datasheet, ATF1508ASL-25QI100 pinout, ATF1508ASL-25QI100 application, or ATF1508ASL-25QI100 equivalent, key selection considerations include its 100-pin TQFP footprint, dual VCCINT/VCCIO supply architecture (5V core / 3.3V or 5V I/O), PCI-compliant drive capability, programmable power-down via PD1/PD2 pins, and security fuse protection.
Technical Context
The ATF1508ASL-25QI100 implements a hierarchical logic architecture with 128 flexible macrocells, each supporting D/T/latch flip-flops, individual output enable, programmable slew rate, and open-collector output option. Its global bus carries all 100 I/O signals plus buried macrocell feedback, feeding switch matrices that select up to 40 signals per logic block.
It integrates IEEE 1149.1-compliant JTAG boundary-scan testing, fast ISP programming, Input Transition Detection (ITD) on global clocks and I/Os, and advanced power management including automatic 10 µA standby ('L' version), pin-controlled 1 mA power-down, and per-macrocell reduced-power mode. The device supports both 3.3V and 5.0V I/O operation with separate VCCIO and VCCINT supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 128 macrocells - provides gate count equivalent to ~2000 usable PLD gates for integration of TTL/SSI/MSI logic blocks. |
| Propagation Delay | 7.5 ns max pin-to-pin - enables reliable operation in high-speed control paths with tight timing budgets. |
| Max Clock Frequency | 125 MHz registered operation - supports synchronous logic in real-time industrial controllers and communication interfaces. |
| I/O Count | 96 bi-directional I/O + 4 dedicated inputs - allows full utilization of 100-pin TQFP package for complex board-level signal routing. |
| Power Modes | 10 µA standby (L-version), 1 mA pin-controlled power-down, per-macrocell reduced-power bit - enables dynamic power scaling in battery-backed or thermally constrained systems. |
| JTAG Compliance | IEEE Std. 1149.1-1990 & 1149.1a-1993 - ensures interoperability with standard boundary-scan test equipment and ATE platforms. |
| PCI Compliance | Fully compliant with PCI electrical specifications - supports direct interfacing to PCI bus without level-shifting or external drivers. |
Pinout & Package
ATF1508ASL-25QI100 is housed in a 100-lead Thin Quad Flat Package (TQFP), measuring 14 mm × 14 mm × 1.4 mm, with 0.5 mm lead pitch and exposed thermal pad. Pin compatibility is maintained across 100-lead PQFP and TQFP variants, though mechanical mounting differs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GCLK1–GCLK3 | Global Clock Inputs | Three dedicated low-skew clock inputs; each can be selected as clock source per macrocell or used for ITD detection. |
| GCLR | Global Clear Input | Asynchronous reset input shared across all macrocells; configurable per macrocell as active-high or OR'd with product term. |
| OE1 / OE2 | Output Enable Inputs | Two global output enable pins; each can be inverted or routed to individual macrocells for fine-grained I/O control. |
| PD1 / PD2 | Power-down Control | Active-high pins enabling hardware-triggered <10 mA power-down mode; disables logic transitions while latching outputs and internal state. |
| TCK / TMS / TDI / TDO | JTAG Test Access Port | Standard 4-pin IEEE 1149.1 interface for boundary-scan testing and in-system programming; pull-up optional on TMS/TDI. |
| VCCINT | Core Supply | 5.0 V ±5% supply for internal logic and input buffers; compatible with both 3.3V and 5V input signaling levels. |
| VCCIO | I/O Supply | Configurable 3.3V (2.7–3.6V) or 5.0V (4.75–5.25V) supply for output drivers; determines output voltage swing and drive strength. |
| I/Oxx | Bi-directional I/O | 96 user-programmable I/Os; each supports input, output, or bidirectional mode with programmable slew rate and pin-keeper. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Pin-keeper | Prevents floating inputs/I/Os by holding last driven state - eliminates need for external pull-ups and reduces system noise and DC leakage. |
| Combinatorial Output with Registered Feedback | Enables dual-latch functionality within single macrocell - supports compact state machine implementation without consuming extra macrocells. |
| Input Transition Detection (ITD) | Detects edges on global clocks, inputs, and I/Os - enables asynchronous event capture (e.g., interrupt generation) without dedicated logic resources. |
| Three Global Clock Pins | Provides independent clock domains for multi-rate subsystems - simplifies timing closure in mixed-speed designs like PCI bridge + local control logic. |
| Security Fuse & User Signature | One-time programmable fuse prevents unauthorized readback; 16-bit user-accessible signature space stores revision, project ID, or date. |
| VCC Power-up Reset Option | Hysteresis-selectable (Small/Large) reset threshold ensures deterministic initialization of registers at power-on - critical for FSM reliability. |
Applications
| Industrial PLC I/O Expansion | PCI Bus Interface Logic |
|---|---|
Use Scenario: Adding custom digital I/O, encoder counting, and watchdog logic to modular PLC backplanes. IC Role / Device Role / Timing Role: Configurable glue logic replacing multiple discrete SSI/MSI chips; handles parallel data capture, pulse-width measurement, and register-based control sequencing. Use Value: Reduces BOM count and PCB area vs. discrete logic; leverages 125 MHz registered speed for sub-8 µs response time on high-speed fieldbus interrupts. |
Use Scenario: Implementing address decoding, bus arbitration, and protocol handshaking between microcontroller and PCI peripheral slot. IC Role / Device Role / Timing Role: PCI-compliant interface controller managing DEVSEL#, FRAME#, IRDY#, TRDY#, and parity generation. Use Value: Eliminates need for external PCI driver ICs; meets PCI DC/AC specs (e.g., VOL ≤ 0.55 V @ 3 mA, IOH ≥ –44 mA) using native I/O structure. |
| Legacy System Emulation | Field-Upgradeable Control Logic |
Use Scenario: Replacing obsolete PAL/GAL devices in avionics or medical equipment where re-spinning PCBs is cost-prohibitive. IC Role / Device Role / Timing Role: Pin-compatible functional replacement for 22V10 or 16V8 logic; retains original timing behavior via 7.5 ns propagation delay. Use Value: Enables long-term obsolescence mitigation with in-system reprogramming - no hardware change required for logic updates or bug fixes. |
Use Scenario: Deploying firmware-upgradable control logic in deployed edge gateways or factory automation nodes. IC Role / Device Role / Timing Role: Field-programmable state machine coordinating sensor fusion, local actuation, and secure OTA update sequencing. Use Value: JTAG ISP allows remote logic updates over Ethernet/USB; security fuse prevents reverse engineering of proprietary control algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1508AS-25QI100 | Lacks automatic 10 µA standby; uses standard 160 mA ICC1 standby current instead of 'L'-version ultra-low power mode. | Suitable for mains-powered systems where standby current is non-critical; not recommended for battery-backed or thermally sensitive deployments. | Select ATF1508ASL-25QI100 when <10 µA quiescent current is required; choose ATF1508AS-25QI100 only if legacy design reuse mandates identical non-L timing specs. |
| XCR3256XL-10TQ144I | 256 macrocells, 10 ns tPD, 3.3V-only core/I/O, no VCCINT/VCCIO separation; higher density but less flexible voltage handling. | Better suited for new 3.3V-only designs requiring >128 macrocells; lacks PCI compliance and dual-voltage I/O needed for mixed-signaling environments. | Choose XCR3256XL-10TQ144I for greenfield 3.3V systems needing higher logic capacity; retain ATF1508ASL-25QI100 for 5V/3.3V coexistence, PCI, or industrial temp support. |
Compared with ATF1508AS-25QI100, the ATF1508ASL-25QI100 delivers 16× lower standby current without sacrificing speed or I/O flexibility; versus XCR3256XL-10TQ144I, it trades macrocell count for broader voltage tolerance, PCI readiness, and proven industrial deployment history.
Availability
ATF1508ASL-25QI100 is available at Aetrix Electronics and suitable for industrial control systems, PCI add-in card development, legacy logic replacement programs, and field-upgradeable embedded controllers requiring stable component supply across extended product lifecycles.
Supply support for ATF1508ASL-25QI100 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) CPLD family, including datasheets, programming tools, and long-term manufacturing commitments.
The ATF1508AS(L) series was designed for high-reliability, pin-locked logic replacement in industrial, telecom, and aerospace applications - emphasizing in-system programmability, robust power management, and seamless migration from bipolar PLDs.
FAQ
What is the operating temperature range for the ATF1508ASL-25QI100?
The ATF1508ASL-25QI100 is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all DC and AC parameters, including 7.5 ns propagation delay and 125 MHz registered performance, making it suitable for harsh-environment applications such as factory automation and outdoor communications equipment.
Does the ATF1508ASL-25QI100 support both 3.3V and 5.0V I/O signaling?
Yes, the ATF1508ASL-25QI100 supports dual-voltage I/O via separate VCCIO and VCCINT supplies: VCCINT must be 5.0V ±5%, while VCCIO can be configured for either 3.3V (2.7–3.6V) or 5.0V (4.75–5.25V). This allows safe interfacing with mixed-voltage systems - for example, connecting 3.3V FPGAs to 5V legacy peripherals - without level shifters.
How does the power-down mode work on the ATF1508ASL-25QI100?
The ATF1508ASL-25QI100 supports hardware-triggered power-down via PD1 or PD2 pins: when either pin is driven high, device current drops below 10 mA, internal logic states and outputs are latched, and all inputs (except PDx) are blocked. The macrocell associated with the PD pin remains usable for buried logic, but its I/O function is disabled during power-down.
Is the ATF1508ASL-25QI100 PCI-compliant, and what does that mean for my design?
Yes, the ATF1508ASL-25QI100 meets PCI Specification Rev. 2.2 electrical requirements, including VOL ≤ 0.55 V @ 3 mA, VOH ≥ 2.4 V @ –2 mA, and sink/source drive strength up to –44 mA / +95 mA. This enables direct connection to PCI bus lines without external drivers - reducing component count and signal integrity risk in add-in cards and host bridge logic.
Can the ATF1508ASL-25QI100 be reprogrammed in-system, and what interface is used?
Yes, the ATF1508ASL-25QI100 supports full in-system programmability (ISP) via its 4-pin JTAG interface (TCK, TMS, TDI, TDO), compliant with IEEE Std. 1149.1. Programming can be performed using Microchip's ATDH2200 download cable, third-party SVF-compatible ATE, or embedded microcontroller interfaces - all without removing the device from the PCB.
ATF1508ASL-25QI100 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:
- 25 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)
ATF1508ASL-25QI100 FAQ
1.How can I place an order for ATF1508ASL-25QI100 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1508ASL-25QI100 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-25QI100 reliable?
The price and inventory of ATF1508ASL-25QI100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1508ASL-25QI100 is usually 5 days.
3.What payment methods are accepted for ATF1508ASL-25QI100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1508ASL-25QI100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1508ASL-25QI100?
ATF1508ASL-25QI100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1508ASL-25QI100 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-25QI100?
For technical support, including ATF1508ASL-25QI100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1508ASL-25QI100 requirements.
6.How does Aetrix verify that ATF1508ASL-25QI100 is sourced from the original manufacturer or authorized distributors?
All ATF1508ASL-25QI100 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-25QI100 meets industry standards.
7.What is the process for return or replacement of ATF1508ASL-25QI100?
All ATF1508ASL-25QI100 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1508ASL-25QI100, 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-25QI100 part is unused and in its original packaging.
Return procedure for ATF1508ASL-25QI100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1508ASL-25QI100 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…
