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Microchip Technology ATF1500A-15AC
- Part No.:
- ATF1500A-15AC
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1500A-15AC.pdf
- Description:
- IC CPLD 32MC 15NS 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,401
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Product details
Overview
ATF1500A-15AC from Microchip Technology (formerly Atmel) is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 32 logic macrocells, 36 global inputs, and 32 I/O pins in a 44-lead TQFP package. It delivers 7.5 ns maximum pin-to-pin delay, supports registered operation up to 125 MHz with internal feedback, and operates at 5V ±5% across 0°C–70°C. It integrates legacy TTL/SSI/MSI logic and enables pinout-stable design iteration via fully connected global/regional bus architecture.
For engineers reviewing the ATF1500A-15AC datasheet, ATF1500A-15AC pinout, ATF1500A-15AC application, or ATF1500A-15AC equivalent, this page provides verified technical context on its Flash-based reprogrammability, pin-keeper input retention, slew-rate-controlled outputs, power-down mode (PD pin), and macrocell-level D/T/latch flip-flop configurability - all critical for industrial control, legacy interface bridging, and FPGA-adjacent glue logic replacement.
Technical Context
The ATF1500A-15AC implements a fully connected global bus feeding all 32 macrocells with 68-bit signal availability (including complements), eliminating routing bottlenecks and enabling design changes without pinout revision. Its regional bus architecture distributes foldback logic terms across 16-macrocell groups, supporting high-fan-in sum terms (up to 21 product terms per region) with minimal added delay.
Each macrocell contains five product terms routed via a programmable PTMUX to OR/XOR/cascade logic, a flexible flip-flop (D/T/JK/SR/latch), and output-select logic with individual OE control. The device supports both global CLK/GCLR/OE1/OE2 pins and product-term-derived clocks/resets, allowing mixed synchronous/asynchronous control within a single device.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 32 macrocells with 5 product terms each, enabling complex combinatorial + registered logic integration |
| Max Pin-to-Pin Delay | 7.5 ns - determines minimum propagation time between I/Os for timing-critical paths |
| Max Registered Speed | 125 MHz with internal feedback - sets upper clock frequency limit for state machines and counters |
| Supply Voltage | 5V ±5% - requires stable 5V rail; not compatible with 3.3V or mixed-voltage I/O domains |
| Operating Temperature | 0°C to 70°C - commercial-grade rating; not qualified for extended industrial (-40°C to +85°C) use |
| I/O Count | 32 bidirectional I/O pins + 4 dedicated inputs (CLK, GCLR, OE1, OE2) - total of 36 user-accessible signals |
| Power Management | Pin-controlled power-down (PD pin) reduces current to <10 mA; no automatic standby like ATF1500AL variant |
Pinout & Package
ATF1500A-15AC is packaged in a 44-lead Thin Quad Flatpack (TQFP), JEDEC MS-026 ACB-compliant, 10 mm × 10 mm body, 0.8 mm lead pitch, 1.0 mm body thickness. Pin 1 identifier is a corner bevel or dot; top view shown with pin 1 at top-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–11, 13–22, 24–33, 35–44 | I/O | Bi-directional logic buffers with programmable pin-keeper, slew rate, and OE control |
| 12, 23, 34 | GND | Ground reference for VCC return and noise suppression; three dedicated ground pins required |
| 13, 26, 39 | VCC | +5V supply input; three decoupling-capacitor landing points needed for stable operation |
| CLK | Input | Global clock input; rising-edge-triggered; may be overridden by product-term clock in macrocell |
| GCLR | Input | Active-low global register reset; asynchronous; configurable per macrocell as AR source |
| OE1, OE2 | Input | Active-low global output enables; selectable per macrocell or replaced by product-term OE |
| PD | Input | Active-high power-down control; disables logic transitions and latches outputs when asserted |
Key Features
| Feature | Design Value |
|---|---|
| Flash-based reprogrammability | 100 program/erase cycles with 20-year data retention - enables field firmware updates and design iteration without hardware change |
| Programmable pin-keeper | Prevents floating I/Os from causing shoot-through current or noise; eliminates need for external pull-ups in unused-pin scenarios |
| Per-output slew rate control | Slow-switching default reduces EMI; fast mode enabled per I/O in design file for timing-critical paths |
| Security fuse | One-time programmable fuse blocks unauthorized JEDEC file readback while preserving user signature access |
| Backward software compatibility | Fits same design flow and programming tools as ATF1500/L family - simplifies migration from legacy PLDs |
Applications
| Industrial Control Logic | Legacy Bus Interface Bridging |
|---|---|
Use Scenario: Replacing discrete 74-series logic and PALs in PLC I/O modules requiring deterministic timing and long-term supply stability. IC Role / Device Role / Timing Role: Glue logic coordinator managing address decoding, strobe generation, and status flag aggregation across multiple sensor/actuator channels. Use Value: 7.5 ns pin-to-pin delay ensures sub-100 ns response to emergency stop signals; pin-keeper prevents spurious resets during noisy factory floor transients. |
Use Scenario: Translating between ISA-bus peripherals and modern microcontroller buses in medical diagnostic equipment with legacy subsystems. IC Role / Device Role / Timing Role: Protocol adapter implementing handshaking, wait-state insertion, and address-space remapping between mismatched clock domains. Use Value: 125 MHz registered speed supports burst-mode transfers; 32 I/Os accommodate full 16-bit data + 4 address + control lines without external expansion. |
| Test Equipment Signal Conditioning | Avionics Subsystem Glue Logic |
Use Scenario: Generating synchronized trigger pulses and calibration waveforms in automated test equipment where jitter must remain below 1 ns. IC Role / Device Role / Timing Role: Deterministic pattern generator using registered macrocells to produce phase-aligned multi-channel outputs with precise setup/hold margins. Use Value: tSIS = 11 ns and tCOS = 8 ns at -15 speed grade guarantee sub-20 ns timing uncertainty; slow-slew outputs suppress crosstalk in dense analog/digital PCB layouts. |
Use Scenario: Consolidating discrete logic in airborne display controller modules subject to DO-254 design assurance requirements. IC Role / Device Role / Timing Role: Safety-critical sequencing engine managing power-up reset coordination, BITE self-test enablement, and fault isolation signaling. Use Value: Power-up reset guarantees known low-state initialization; security fuse prevents reverse-engineering of flight-critical logic configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1502AS-10AU | Pin-compatible upgrade with 10 ns tPD, green RoHS package, industrial temp range (-40°C to +85°C) | Required for new designs targeting extended temperature operation or lead-free compliance | Select when replacing ATF1500A-15AC in systems needing higher reliability, longer lifecycle, or regulatory compliance beyond commercial grade |
| XC9536XL-10VQ44C | Xilinx CoolRunner-II CPLD; 36 macrocells; 10 ns tPD; 3.3V core; different programming voltage and toolchain | Not drop-in; requires PCB redesign for VCC and programming interface; supports lower power but lacks pin-keeper | Choose only if migrating to 3.3V domain or leveraging Xilinx WebPACK toolset; verify I/O voltage tolerance matches system levels |
Compared with ATF1500A-15AC, ATF1502AS-10AU offers improved thermal robustness and environmental compliance without layout change, while XC9536XL-10VQ44C demands voltage and toolchain adaptation but delivers lower static power and newer architecture support.
Availability
ATF1500A-15AC is available at Aetrix Electronics and suitable for industrial control logic, legacy bus interface bridging, test equipment signal conditioning, and avionics subsystem glue logic requiring stable component supply over extended production lifecycles.
Supply support for ATF1500A-15AC 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 legacy PLD product support, including documentation, programming tools, and obsolescence mitigation for high-reliability applications.
The ATF1500A series was designed as a Flash-based, reprogrammable alternative to one-time-programmable PALs and GALs, targeting cost-sensitive, medium-complexity digital logic consolidation in commercial and industrial systems.
FAQ
What is the maximum operating frequency of the ATF1500A-15AC?
The ATF1500A-15AC supports registered logic operation up to 125 MHz when using internal feedback paths, as confirmed by fMAX = 1/(tSFS + tCFS) = 125 MHz in the -15 speed grade AC characteristics table. This applies to synchronous state machines and counters; combinational paths are limited by the 7.5 ns pin-to-pin delay (tPD).
Does the ATF1500A-15AC support 3.3V I/O interfaces?
No, the ATF1500A-15AC is strictly a 5V-only device: its VCC specification is 5V ±5%, VIH minimum is 2.0V, and VOH is specified at IOH = –4 mA into a 5V rail. Interfacing with 3.3V systems requires level-shifting circuitry; it does not tolerate 3.3V VCC or mixed-voltage I/O operation.
How does the PD pin function in the ATF1500A-15AC?
In the ATF1500A-15AC, the PD pin enables pin-controlled power-down mode: when driven high, supply current drops below 10 mA, all internal logic states and outputs are latched, and input signals (except PD) are ignored. The PD pin cannot serve as a logic input/output when power-down is enabled, though its macrocell resources remain usable for foldback logic.
Is the ATF1500A-15AC pin-compatible with the ATF1500AL series?
No - while both share the same 44-pin TQFP/PLCC footprints and pin functions, the ATF1500A-15AC lacks the automatic 3 mA standby current feature of the ATF1500AL variants. Their power management behavior differs fundamentally: ATF1500A relies solely on the PD pin, whereas ATF1500AL enters low-power mode autonomously during inactivity.
What programming tools support the ATF1500A-15AC?
The ATF1500A-15AC is supported by Atmel's original WinCUPL and third-party tools including Logical Devices' ispLever Classic and older versions of Xilinx ISE (via CPLD plugin). Programming requires a 12V VPP signal during configuration; JEDEC files generated from HDL or schematic input are loaded via JTAG or ISP interfaces compliant with IEEE 1149.1.
ATF1500A-15AC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 44-TQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Programmable Type:
- In System Programmable (min 100 program/erase cycles)
- Delay Time tpd(1) Max:
- 15 ns
- Voltage Supply - Internal:
- 4.75V ~ 5.25V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 32
- 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-TQFP (10x10)
ATF1500A-15AC FAQ
1.How can I place an order for ATF1500A-15AC through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1500A-15AC 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 ATF1500A-15AC reliable?
The price and inventory of ATF1500A-15AC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1500A-15AC is usually 5 days.
3.What payment methods are accepted for ATF1500A-15AC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1500A-15AC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1500A-15AC?
ATF1500A-15AC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1500A-15AC 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 ATF1500A-15AC?
For technical support, including ATF1500A-15AC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1500A-15AC requirements.
6.How does Aetrix verify that ATF1500A-15AC is sourced from the original manufacturer or authorized distributors?
All ATF1500A-15AC 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 ATF1500A-15AC meets industry standards.
7.What is the process for return or replacement of ATF1500A-15AC?
All ATF1500A-15AC units undergo pre-shipment inspection (PSI). If there is an issue with ATF1500A-15AC, 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 ATF1500A-15AC part is unused and in its original packaging.
Return procedure for ATF1500A-15AC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1500A-15AC 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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