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Microchip Technology ATF1500A-12AC
- Part No.:
- ATF1500A-12AC
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1500A-12AC.pdf
- Description:
- IC CPLD 32MC 12NS 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,863
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Product details
Overview
ATF1500A-12AC from Atmel is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 32 macrocells, 32 I/O pins, and 4 dedicated global control inputs. It delivers 7.5 ns maximum pin-to-pin delay, supports registered operation up to 62.5 MHz, and operates at 5V ±5% in commercial temperature range (0°C to 70°C). It is used in digital logic consolidation for industrial control interfaces and legacy system upgrades.
For engineers reviewing the ATF1500A-12AC datasheet, ATF1500A-12AC pinout, ATF1500A-12AC application, or ATF1500A-12AC equivalent, key selection criteria include its TQFP-44 package, programmable slew rate per I/O, pin-controlled power-down mode, flash-based reprogrammability, and compatibility with ATF1500/L design tools.
Technical Context
The ATF1500A-12AC implements a fully connected global bus architecture feeding all 32 macrocells with 68-bit signal availability (I/O, dedicated inputs, and buried feedback), enabling flexible logic placement without pinout changes. Its macrocell structure includes five product terms, OR/XOR/cascade logic, D/T/latch-configurable flip-flops, and individual output enable/slew control.
It features dual feedback paths-global bus for full-device signal access and regional bus for 16-macrocell groupings-supporting high-fan-in sum terms (up to 40 product terms via cascade chains) and efficient arithmetic/comparison logic. The device uses advanced Flash technology with 100 program/erase cycles and 20-year data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 32 macrocells with 36 total inputs and 32 I/Os - sufficient to replace multiple TTL/SSI/MSI devices or classic PLDs in mid-complexity glue logic. |
| Max Pin-to-Pin Delay | 12 ns - defines worst-case combinatorial path timing for synchronous interface design and setup/hold margin calculation. |
| Max Registered Speed | 62.5 MHz - derived from 12 ns clock period; sets upper limit for state machine or counter clock frequency with internal feedback. |
| Supply Voltage | 5V ±5% - requires stable 5V rail; not compatible with 3.3V or mixed-voltage I/O without level translation. |
| Operating Temperature | 0°C to 70°C - commercial grade; unsuitable for extended industrial or automotive environments without derating. |
| Power-Down Current | <10 mA - achieved when PD pin driven high; enables low-power suspend states in battery-backed or intermittent-operation systems. |
| ESD Protection | 2000V HBM - provides robust handling during board assembly and field service without external protection diodes. |
Pinout & Package
ATF1500A-12AC is packaged in a 44-lead Thin Quad Flatpack (TQFP), body size 10 × 10 mm, lead pitch 0.8 mm, JEDEC MS-026 ACB compliant. Pin 1 identifier is a corner bevel or dot; pin numbering proceeds counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Global clock input | Primary synchronous edge-trigger source for all macrocell registers; rising-edge sensitive; may be overridden by product-term clock in individual macrocells. |
| GCLR | Global asynchronous reset | Active-low signal resetting all macrocell flip-flops simultaneously; may be OR'd with product-term reset for selective clearing. |
| OE1, OE2 | Global output enable | Active-low controls tri-state of all I/O buffers; each can be assigned independently per macrocell or globally disabled. |
| PD | Power-down control | Active-high input enabling <10 mA standby; disables internal logic transitions while latching outputs and register states. |
| VCC, GND | Power supply terminals | Four VCC (pins 9, 16, 25, 44) and three GND (pins 4, 23, 35) provide low-impedance decoupling paths; require local 0.1 µF ceramic capacitors. |
| I/O | Bi-directional logic buffer | All 32 I/O pins support configurable input/output direction, programmable pin-keeper (prevents floating), and slew-rate control (slow/fast). |
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 component replacement. |
| Programmable slew rate per I/O | Individual macrocell-level control to reduce EMI and crosstalk on non-critical signals while preserving speed on timing-critical paths. |
| Pin-keeper circuitry | Eliminates need for external pull-up/down resistors on unused I/Os, reducing BOM cost, PCB area, and static power draw. |
| Global + regional bus architecture | Ensures any signal is available to any macrocell (global) or regional subset (16 macrocells), simplifying place-and-route and supporting design changes without pinout revision. |
| Security fuse | One-time programmable fuse blocking unauthorized readback of JEDEC fuse pattern - protects proprietary logic configuration. |
Applications
| Industrial Control Interface | Legacy System Glue Logic |
|---|---|
Use Scenario: Interfacing microcontrollers to parallel buses, address decoders, and peripheral select logic in PLC backplanes and motion controllers. IC Role / Device Role / Timing Role: CPLD implementing address decoding, chip select generation, and handshake synchronization between 8/16-bit processors and discrete peripherals. Use Value: Replaces 5–8 discrete TTL packages with single ATF1500A-12AC, reducing board space, interconnect complexity, and long-term obsolescence risk. | Use Scenario: Upgrading aging minicomputer or embedded instrumentation systems using obsolete PAL/GAL devices. IC Role / Device Role / Timing Role: Drop-in logic replacement for 22V10 or 16V8 PALs, leveraging backward-compatible ATF1500/L toolchain and identical pinout mapping for existing PCBs. Use Value: Maintains original board layout while adding flash reprogrammability, improved timing margins (12 ns vs. 25 ns PAL), and enhanced testability via preload vectors. |
| Test Equipment Signal Routing | Digital Communications Protocol Bridge |
Use Scenario: Configurable signal multiplexing and protocol adaptation in automated test equipment (ATE) front-end modules. IC Role / Device Role / Timing Role: Dynamic I/O direction control and real-time signal gating for switching between DUT interface standards (e.g., GPIB, RS-232, LVDS). Use Value: Enables single-hardware platform to support multiple DUT types via reconfigurable logic, avoiding custom ASIC development and reducing NRE cost. | Use Scenario: Bridging UART-based microcontroller peripherals to SPI or I²C sensor networks in building automation gateways. IC Role / Device Role / Timing Role: Synchronous protocol conversion engine with handshaking, FIFO buffering, and clock domain crossing between asynchronous serial streams. Use Value: Offloads bit-banging and timing-critical framing from host MCU, improving real-time responsiveness and reducing firmware complexity. |
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 44-pin TQFP; 10 ns speed grade; green (RoHS) package; same 32-macrocell architecture but higher max frequency (100 MHz). | Supports faster clock domains and tighter timing closure; required for new designs targeting industrial temp (-40°C to +85°C) with Pb-free compliance. | Select when upgrading from ATF1500A-12AC for improved performance, extended temperature range, or RoHS compliance - no PCB change needed. |
| XC9536XL-10VQ44C | Xilinx CoolRunner-II CPLD; 36 macrocells; 10 ns propagation; 3.3V core/I/O; different pinout and programming voltage requirements. | Requires level-shifting for 5V systems; incompatible JTAG chain and design tools; lower static current (10 µA vs. 70 mA standby). | Choose only if migrating to 3.3V infrastructure and accepting toolchain transition; not a drop-in replacement due to voltage and pinout mismatch. |
Compared with ATF1500A-12AC, ATF1502AS-10AU offers higher speed and RoHS compliance in the same footprint, while XC9536XL-10VQ44C demands voltage redesign and tool migration but delivers lower power and newer architecture - both require validation against timing and signal integrity constraints.
Availability
ATF1500A-12AC is available at Aetrix Electronics and suitable for industrial control interface, legacy system glue logic, and digital communications protocol bridge applications requiring stable component supply and long-term obsolescence management.
Supply support for ATF1500A-12AC 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
Atmel Corporation (now part of Microchip Technology) designed high-reliability non-volatile programmable logic and microcontroller solutions for industrial, automotive, and consumer markets.
The ATF1500A family was engineered for logic consolidation in 5V systems, emphasizing flash reprogrammability, pin compatibility across speed grades, and seamless migration from bipolar PAL/GAL architectures.
FAQ
What is the maximum operating frequency of the ATF1500A-12AC?
The ATF1500A-12AC supports registered operation up to 62.5 MHz, calculated from its 12 ns clock period specification. This applies to internal feedback paths; external feedback paths achieve 40 MHz, and no-feedback operation reaches 83 MHz. These values are guaranteed under commercial temperature and 5V ±5% supply conditions as specified in the AC Characteristics table.
Does the ATF1500A-12AC support in-system programming?
Yes, the ATF1500A-12AC supports in-system programming via JTAG IEEE 1149.1 interface. It requires 5V VCC and standard JTAG signals (TCK, TMS, TDI, TDO); no additional programming voltage is needed. Programming is performed using Atmel's ISP software or third-party tools compatible with ATF1500/L file formats.
Can the PD pin on the ATF1500A-12AC be used as a general-purpose I/O?
No - when the power-down feature is enabled in the design file, the PD pin functions exclusively as an active-high power-down control and cannot serve as a logic input or output. If power-down is disabled, the PD pin remains unconnected and unused; it does not become configurable as I/O.
What is the purpose of the pin-keeper feature in the ATF1500A-12AC?
The pin-keeper feature maintains the last driven logic state (high or low) on unused or floating I/O pins, preventing intermediate voltage levels that cause shoot-through current and noise. It eliminates external pull-up/down resistors, reducing power consumption and PCB area. Pin-keeper is enabled per-pin via the design file and is inactive by default.
Is the ATF1500A-12AC RoHS compliant?
No - the ATF1500A-12AC uses a standard leaded TQFP package (44A) and is not RoHS compliant. For Pb-free alternatives, consider the ATF1502AS-10AU (green package, industrial grade) or ATF1500A-10AU, both listed in Atmel's Green Package Options table with identical pinout and RoHS certification.
ATF1500A-12AC 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:
- 12 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-12AC FAQ
1.How can I place an order for ATF1500A-12AC through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1500A-12AC 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-12AC reliable?
The price and inventory of ATF1500A-12AC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1500A-12AC is usually 5 days.
3.What payment methods are accepted for ATF1500A-12AC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1500A-12AC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1500A-12AC?
ATF1500A-12AC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1500A-12AC 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-12AC?
For technical support, including ATF1500A-12AC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1500A-12AC requirements.
6.How does Aetrix verify that ATF1500A-12AC is sourced from the original manufacturer or authorized distributors?
All ATF1500A-12AC 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-12AC meets industry standards.
7.What is the process for return or replacement of ATF1500A-12AC?
All ATF1500A-12AC units undergo pre-shipment inspection (PSI). If there is an issue with ATF1500A-12AC, 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-12AC part is unused and in its original packaging.
Return procedure for ATF1500A-12AC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1500A-12AC 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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