Microchip Technology ATF1504ASVL-20AC100

Overview

ATF1504ASVL-20AC100 from Microchip Technology is a 3.3V, 64-macrocell Complex Programmable Logic Device (CPLD) in 100-lead TQFP package, featuring 15 ns maximum pin-to-pin delay, 77 MHz registered operation, and automatic 5 µA standby current. It integrates logic from TTL/SSI/MSI/LSI and classic PLDs, supporting industrial temperature range (-40°C to +85°C) and PCI-compliant system interfaces.

For engineers reviewing the ATF1504ASVL-20AC100 datasheet, ATF1504ASVL-20AC100 pinout, ATF1504ASVL-20AC100 application, or ATF1504ASVL-20AC100 equivalent, key selection criteria include JTAG ISP capability, macrocell-level power reduction, programmable slew rate, pin-keeper circuits for floating I/O, and dual PD1/PD2 power-down control with sub-5 mA quiescent current.

Technical Context

The ATF1504ASVL-20AC100 implements a hierarchical logic architecture with 64 macrocells, each containing five product terms expandable via cascade logic to up to 40 terms per chain across four independent logic chains. Its global bus feeds all 68 I/O and dedicated input signals into switch matrices that select up to 40 signals per logic block.

Each macrocell supports D/T/Latch flip-flops with individually configurable clock (GCLK1–3 or product-term), asynchronous reset (GCLR or product term), output enable (OE1/OE2), and combinatorial or registered feedback. ITD circuits on global clocks and I/O pins enable input transition detection, while VCC power-up reset with large-hysteresis option ensures robust state machine initialization.

Key Specifications

Pinout & Package

ATF1504ASVL-20AC100 is housed in a 100-lead Thin Quad Flat Package (TQFP) with 0.5 mm pitch, 14 mm × 14 mm body size, and exposed thermal pad (per Microchip DS20006185A, page 3). Pin functions are validated per Table 1-6 and Table 1-7 of the official datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CPLD applications.

Compared with ATF1504ASV-20AC100, the ATF1504ASVL-20AC100 delivers guaranteed 5 µA standby without external control, while XCR3064XL-10VQ100C offers lower baseline ICC1 but sacrifices pin-keeper circuits and ITD - making ATF1504ASVL-20AC100 preferable for industrial systems with unconnected I/O traces.

Availability

ATF1504ASVL-20AC100 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy system interface bridging, PCI-compliant peripheral control, and power-sensitive sensor hub logic requiring stable component supply across extended lifecycle programs.

Supply support for ATF1504ASVL-20AC100 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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, with broad industrial and automotive qualification programs and long-term product availability commitments.

The ATF1504ASVL series belongs to Microchip's legacy electrically-erasable CPLD family, designed specifically for logic consolidation, interface bridging, and industrial control applications requiring in-system programmability and robust EEPROM-based configuration retention.

FAQ

What is the standby current specification for ATF1504ASVL-20AC100?

The ATF1504ASVL-20AC100 features automatic 5 µA standby current (typical) under no-activity conditions, as confirmed in DS20006185A page 8, Table 1-2. This is a distinguishing feature of the "L" suffix variant versus the standard ATF1504ASV, which requires pin-controlled 100 µA standby. The 5 µA value is measured at maximum VCC with all inputs at GND or VCC, and applies across the full industrial temperature range.

Does ATF1504ASVL-20AC100 support JTAG in-system programming?

Yes, ATF1504ASVL-20AC100 fully supports IEEE Std. 1149.1-1990/1149.1a-1993 JTAG boundary-scan and in-system programming via its dedicated TDI, TMS, TCK, and TDO pins. The device includes a compliant BSDL file and accepts Serial Vector Format (SVF) files. JTAG functionality is programmable - if disabled, those four pins become general-purpose I/Os.

What package type and pin count does ATF1504ASVL-20AC100 use?

ATF1504ASVL-20AC100 is packaged in a 100-lead Thin Quad Flat Package (TQFP) with 0.5 mm pitch and 14 mm × 14 mm body size, as documented in DS20006185A page 3. It provides 64 user I/O pins plus 4 dedicated inputs (GCLK1–3, GCLR), totaling 68 signal pins, with 8 VCC and 8 GND pins distributed for noise reduction.

How does the power-down mode function on ATF1504ASVL-20AC100?

ATF1504ASVL-20AC100 supports pin-controlled power-down via PD1 and/or PD2 inputs. When either pin is driven high, the device enters a sub-5 mA mode where all internal logic states and registered outputs are latched and held. Inputs (except PD pins) are blocked, and pin-keeper circuits remain active to prevent floating. The feature is enabled in the design software and disables PD pins as logic I/Os.

What is the maximum operating frequency for registered logic in ATF1504ASVL-20AC100?

The ATF1504ASVL-20AC100 supports registered operation up to 77 MHz, as stated in the Features section of DS20006185A page 1. This corresponds to the -20 speed grade, verified by fCNT = 66 MHz (minimum clock period 17 ns) in Table 1-4 on page 10. The 77 MHz figure reflects achievable system-level performance under optimal routing and loading conditions.