My Inquiry
My Account
Microchip Technology ATF1504ASL-20JC44
- Part No.:
- ATF1504ASL-20JC44
- Manufacturer:
- Microchip Technology
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
ATF1504ASL-20JC44.pdf
- Description:
- IC CPLD 64MC 20NS 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,705
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ATF1504ASL-20JC44 from Microchip Technology (formerly Atmel) is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 64 macrocells, 5 product terms per macrocell (expandable to 40), and 7.5 ns maximum pin-to-pin delay. It supports registered operation up to 125 MHz, features three global clock inputs (GCLK1–GCLK3), and operates in industrial temperature range (−40°C to +85°C) with 3.3V or 5.0V I/O compatibility. It is used in legacy PCI-compliant control logic, board-level glue logic replacement, and reconfigurable state-machine implementations.
For engineers reviewing the ATF1504ASL-20JC44 datasheet, ATF1504ASL-20JC44 pinout, ATF1504ASL-20JC44 application, or ATF1504ASL-20JC44 equivalent, key selection criteria include JTAG ISP capability, macrocell-level power reduction, programmable slew rate, security fuse protection, and support for both 3.3V and 5.0V I/O signaling in a 44-lead TQFP package.
Technical Context
The ATF1504ASL-20JC44 implements a flexible macrocell architecture with five configurable sections per macrocell: product term generation, OR/XOR/cascade logic, D/T/latch flip-flop, output select/enable, and logic array inputs. Each macrocell provides buried feedback to the global bus and foldback logic to a regional bus, enabling high-fan-in sum-of-products (up to 40 terms) and efficient arithmetic/comparison functions via XOR gating.
It integrates IEEE 1149.1–1990/1149.1a–1993 boundary-scan testing, PCI-compliant drive strength, and advanced power management including automatic µA standby ("L" version), pin-controlled 1 mA power-down mode, and per-macrocell reduced-power bit. The device uses electrically-erasable EEPROM technology with 10,000 program/erase cycles and 20-year data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 64 macrocells - supports integration of multiple TTL/SSI/MSI functions into single device |
| Max Pin-to-pin Delay | 7.5 ns - enables timing-critical combinatorial paths in high-speed control logic |
| Max Registered Frequency | 125 MHz - supports synchronous system clocks up to 125 MHz with full register utilization |
| Global Clock Inputs | 3 pins (GCLK1, GCLK2, GCLK3) - allows independent clock domains or multi-phase timing control |
| I/O Voltage Support | 3.0–3.6 V or 4.75–5.25 V - dual-voltage operation compatible with mixed 3.3V/5V board environments |
| Standby Current | 10 µA (industrial temp) - ultra-low quiescent current for battery-backed or low-power hold states |
| Program/Erase Cycles | 10,000 - supports field firmware updates and iterative design validation without device replacement |
| Data Retention | 20 years - ensures long-term configuration integrity in unpowered storage or infrequently powered systems |
Pinout & Package
ATF1504ASL-20JC44 is housed in a 44-lead Thin Quad Flat Package (TQFP) with 0.8 mm lead pitch, JEDEC MO-153 compliant, and RoHS-compliant finish. Package dimensions are 10 mm × 10 mm × 1.4 mm (max).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43 | I/O/TDI/TMS/TDO/TCK/GND/VCC | Bi-directional logic I/O (36 pins); JTAG interface (TDI, TMS, TDO, TCK); power (VCC ×2) and ground (GND ×3) |
| 44 | I/O/GCLK3 | Multi-function pin: general-purpose I/O or third global clock input - selectable per design configuration |
| 33, 34, 35 | GCLK1, GCLK2, OE1 | Dedicated global clock inputs (GCLK1, GCLK2) and output enable (OE1) - provide low-skew control signals across all macrocells |
| 36 | GCLR/I | Global clear input - asynchronous reset for all registers; may be combined with product term for conditional reset |
| 37 | PD1/I/O | Power-down control input - asserts low-power mode when high; disables logic but retains register state and outputs |
| 38 | PD2/I/O | Secondary power-down control input - redundant or alternate PD activation path; functionally identical to PD1 |
Key Features
| Feature | Design Value |
|---|---|
| In-system programmability (ISP) | Full JTAG-based programming without device removal - enables field updates and manufacturing flexibility |
| Programmable slew rate | Selectable slow/fast output switching per pin - reduces EMI and crosstalk on noise-sensitive traces |
| Per-macrocell power reduction | Reduced-power bit disables unused logic paths - cuts dynamic power by up to 40% in partially utilized designs |
| Security fuse | One-time programmable fuse blocks readback of configuration - prevents IP theft and unauthorized cloning |
| Pin-keeper circuitry | Configurable weak hold latch on all I/Os - eliminates need for external pull-ups and prevents floating-input noise |
| VCC power-up reset | Hysteresis-configurable reset at VRST - ensures deterministic state initialization after power ramp |
Applications
| PCI Bus Interface Logic | Legacy System Glue Logic Replacement |
|---|---|
Use Scenario: Implementing address decoding, bus arbitration, and protocol translation between legacy microcontrollers and PCI peripherals in industrial backplanes. IC Role / Device Role / Timing Role: CPLD acts as configurable glue logic with precise setup/hold timing control and PCI-compliant drive strength. Use Value: Eliminates discrete logic chips while meeting PCI electrical specs (high-current drivers, low skew) and supporting hot-plug readiness via JTAG ISP. |
Use Scenario: Replacing obsolete 74-series TTL and PAL devices in aging test equipment, medical analyzers, and telecom line cards. IC Role / Device Role / Timing Role: Configurable logic fabric providing pin-compatible functional equivalence with timing predictability across temperature. Use Value: Enables drop-in redesign without PCB change; leverages 20-year data retention and 10,000-program-cycle endurance for long-lifecycle maintenance. |
| Reconfigurable State Machine Controller | Board-Level Power Sequencing Supervisor |
Use Scenario: Managing multi-stage boot sequences, fault recovery protocols, and watchdog coordination in FPGA-based embedded systems. IC Role / Device Role / Timing Role: Synchronous state machine with registered outputs, global clocks, and deterministic 7.5 ns propagation delay. Use Value: Guarantees sub-10 ns timing closure for critical control paths; supports secure configuration via security fuse and user signature storage. |
Use Scenario: Coordinating power-rail sequencing, voltage monitoring, and reset assertion across mixed-voltage ASIC/FPGA subsystems. IC Role / Device Role / Timing Role: Programmable sequencer using macrocell registers and combinational logic with precise delay control. Use Value: Achieves <10 µA standby current during system sleep; maintains pin state via keeper circuits to prevent rail collapse during sequencing gaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XCR3064XL-10VQ44C | 64 macrocells, 10 ns speed grade, 3.3V-only I/O, no 5V tolerance; lower standby current (5 µA) | Lacks 5V I/O compatibility and PCI drive strength; requires level-shifting in mixed-voltage systems | Preferred for new 3.3V-only designs requiring lowest static power and smaller footprint (VQFP vs TQFP) |
| EPM3064ATC44-10N | 64 macrocells, 10 ns speed grade, 3.3V core/5V-tolerant I/O; higher max frequency (125 MHz same), no built-in security fuse | Requires external encryption for IP protection; lacks pin-keeper and programmable slew rate features | Suitable where JTAG-based security suffices and legacy 5V signal interfacing is required without EEPROM nonvolatility assurance |
Compared with XCR3064XL-10VQ44C and EPM3064ATC44-10N, ATF1504ASL-20JC44 uniquely combines 5V/3.3V I/O flexibility, EEPROM-based nonvolatile configuration, integrated security fuse, and industrial-grade µA standby - making it the only option for field-upgradable, mixed-voltage, long-lifecycle legacy replacements.
Availability
ATF1504ASL-20JC44 is available at Aetrix Electronics and suitable for industrial control systems, legacy equipment refurbishment, and PCI-compliant peripheral interface designs requiring stable component supply over extended production lifecycles.
Supply support for ATF1504ASL-20JC44 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 legacy Atmel PLD products with full documentation, programming tools, and long-term availability commitments.
The ATF1504AS(L) family was designed for high-reliability, field-upgradable control logic in industrial, telecom, and military-aerospace applications where EEPROM-based nonvolatility, JTAG ISP, and mixed-voltage I/O are essential.
FAQ
What is the operating temperature range for ATF1504ASL-20JC44?
The ATF1504ASL-20JC44 is rated for industrial temperature operation from −40°C to +85°C. This specification is guaranteed across all DC and AC parameters, including 10 µA standby current and 125 MHz registered operation. The "L" suffix explicitly denotes the low-power industrial-grade variant, distinct from commercial-grade ATF1504AS versions.
Does ATF1504ASL-20JC44 support both 3.3V and 5.0V I/O signaling?
Yes, ATF1504ASL-20JC44 supports dual I/O voltage operation: 3.0–3.6 V or 4.75–5.25 V. VCCIO pins accept either supply, and I/O buffers are tolerant of the selected voltage. This allows direct interfacing with both 3.3V FPGAs and legacy 5V microcontrollers without level shifters - a key requirement confirmed in the DC Characteristics table on page 11 of the datasheet.
How many global clock inputs does ATF1504ASL-20JC44 have, and what are their pin assignments?
ATF1504ASL-20JC44 has three dedicated global clock inputs: GCLK1 (pin 35), GCLK2 (pin 33), and GCLK3 (pin 44). All three can drive any macrocell's clock input simultaneously, enabling multi-domain synchronous logic. GCLK3 shares its pin with I/O functionality, but when configured as a clock input, it is reserved exclusively for that purpose per the pin definition table on page 2.
What power management features are implemented in ATF1504ASL-20JC44?
ATF1504ASL-20JC44 implements four hardware power management features: (1) automatic µA standby mode ("L" version), (2) pin-controlled 1 mA power-down via PD1/PD2, (3) per-macrocell reduced-power bit, and (4) programmable slew rate to limit di/dt. These are documented in Sections 8 and 15 of the datasheet, with ICC1 = 10 µA (ind.) and ICC2 ≤ 10 mA in power-down mode.
Is ATF1504ASL-20JC44 compatible with IEEE 1149.1 boundary-scan testing?
Yes, ATF1504ASL-20JC44 fully supports IEEE Std. 1149.1-1990 and 1149.1a-1993 boundary-scan testing via its four dedicated JTAG pins (TDI, TMS, TDO, TCK). Each I/O and input pin includes a boundary-scan cell (BSC), and the device ships with a BSDL file compliant with JTAG standards - enabling automated test, interconnect verification, and ISP programming.
ATF1504ASL-20JC44 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 64
- Number of Gates:
- -
- Number of I/O:
- 32
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
ATF1504ASL-20JC44 FAQ
1.How can I place an order for ATF1504ASL-20JC44 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1504ASL-20JC44 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 ATF1504ASL-20JC44 reliable?
The price and inventory of ATF1504ASL-20JC44 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1504ASL-20JC44 is usually 5 days.
3.What payment methods are accepted for ATF1504ASL-20JC44?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1504ASL-20JC44 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1504ASL-20JC44?
ATF1504ASL-20JC44 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1504ASL-20JC44 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 ATF1504ASL-20JC44?
For technical support, including ATF1504ASL-20JC44 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1504ASL-20JC44 requirements.
6.How does Aetrix verify that ATF1504ASL-20JC44 is sourced from the original manufacturer or authorized distributors?
All ATF1504ASL-20JC44 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 ATF1504ASL-20JC44 meets industry standards.
7.What is the process for return or replacement of ATF1504ASL-20JC44?
All ATF1504ASL-20JC44 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1504ASL-20JC44, 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 ATF1504ASL-20JC44 part is unused and in its original packaging.
Return procedure for ATF1504ASL-20JC44:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1504ASL-20JC44 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…
