My Inquiry
My Account
Microchip Technology ATF1500A-15AI
- Part No.:
- ATF1500A-15AI
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1500A-15AI.pdf
- Description:
- IC CPLD 32MC 15NS 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,628
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ATF1500A-15AI from Microchip Technology (formerly Atmel) is a high-density, electrically erasable Complex Programmable Logic Device (CPLD) with 32 macrocells, 32 I/O pins, and four dedicated global control inputs (CLK, GCLR, OE1, OE2). It delivers 7.5 ns maximum pin-to-pin delay and supports registered logic operation up to 52.6 MHz in industrial temperature range (–40°C to +85°C), used in legacy industrial control logic consolidation and FPGA companion glue logic.
For engineers reviewing the ATF1500A-15AI datasheet, ATF1500A-15AI pinout, ATF1500A-15AI application, or ATF1500A-15AI equivalent, key selection considerations include its TQFP-44/PLCC-44 dual-package support, programmable slew rate per I/O, pin-keeper input retention, power-down mode (PD pin), and Flash-based reprogrammability - all critical for maintaining legacy 5 V system compatibility and long-term supply continuity.
Technical Context
The ATF1500A-15AI implements a fully connected global bus architecture feeding all 32 macrocells with 68-bit signal availability (I/Os + buried feedback + complements), 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 routing via OE1/OE2 pins or product terms.
It features automatic standby current reduction (100 mA max at industrial temp), optional pin-controlled power-down (<10 mA), programmable pin-keeper circuits on all I/Os to prevent floating, and slow/fast slew-rate control per output - all configured in the design source file, not runtime.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 32 macrocells, 36 total inputs (32 I/O + 4 dedicated globals) |
| Max Pin-to-Pin Delay | 7.5 ns - determines minimum combinational path timing in logic implementation |
| Max Registered Speed | 52.6 MHz - derived from 1/(tSIS + tCOS) = 1/(11 + 8) ns for -15 speed grade |
| Supply Voltage | 5 V ±10% - supports industrial-grade 5 V rail tolerance without regulation |
| Operating Temp | –40°C to +85°C - qualified for uncontrolled industrial environments |
| Package Options | TQFP-44 (44A) and PLCC-44 (44J) - both RoHS-compliant, lead-free variants available |
| Power-Down Current | <10 mA - activated by high-level PD pin; latches outputs and internal state |
Pinout & Package
ATF1500A-15AI is packaged in a 44-lead Thin Quad Flatpack (TQFP-44, JEDEC MS-026 ACB), 10 mm × 10 mm body, 0.8 mm pitch, 1.0 mm thickness. Pin 1 identifier is a corner notch or dot; top view shown with I/O, power, and control terminals distributed across four sides.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Global clock input | Primary synchronous edge-trigger source for all macrocell registers; rising-edge sensitive |
| GCLR | Active-low global reset | Asynchronous register reset; may be OR'd with product-term reset within macrocell |
| OE1, OE2 | Active-low output enables | Selectable per macrocell to control tri-state behavior; supports shared or individual enable schemes |
| PD | Power-down control | High-level assertion enters low-power mode; disables logic transitions but retains output states |
| VCC | +5 V supply | Single 5 V rail powers core and I/O; no separate I/O voltage required |
| GND | Ground reference | Four dedicated ground pins minimize noise coupling and improve signal integrity |
| I/O (32 pins) | Bi-directional logic interface | Configurable as input, output, or bidirectional; each supports pin-keeper and slew-rate control |
Key Features
| Feature | Design Value |
|---|---|
| Fully connected global bus | All 32 I/Os + 32 buried feedbacks + complements feed every macrocell - eliminates routing bottlenecks |
| Programmable pin-keeper | Prevents floating on unused I/Os; eliminates external pull-ups and associated DC power loss |
| Per-I/O slew rate control | Slows non-critical outputs to reduce EMI; defaults to slow; fast mode enabled per pin in design file |
| Flash-based reprogrammability | 100 program/erase cycles, 20-year data retention, 100% tested - supports field updates and prototyping |
| Security fuse | One-time programmable fuse blocks unauthorized JEDEC pattern readback while preserving user signature access |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Translation |
|---|---|
Use Scenario: Adding isolated digital I/O channels to a DIN-rail mounted PLC with 5 V TTL-compatible backplane. IC Role / Device Role / Timing Role: Glue logic consolidating discrete buffers, level shifters, and handshake controllers into single CPLD; handles strobe synchronization and status encoding. Use Value: Reduces BOM count by 7+ components per channel; maintains 5 V logic compatibility and withstands –40°C startup. |
Use Scenario: Bridging ISA-bus peripherals (e.g., legacy data acquisition cards) to modern microcontroller-based systems using parallel GPIO. IC Role / Device Role / Timing Role: Timing-compliant address decode, chip select generation, and bus arbitration logic with precise setup/hold enforcement. Use Value: Achieves 7.5 ns pin-to-pin delay to meet ISA's 8 MHz timing budget; eliminates timing margin uncertainty from discrete gate chains. |
| Automated Test Equipment (ATE) Pattern Generator | Medical Device Power Sequencing Controller |
Use Scenario: Generating synchronized stimulus waveforms for analog front-end calibration in benchtop ATE systems. IC Role / Device Role / Timing Role: High-speed registered logic generating multi-phase clocks, trigger pulses, and pattern counters with deterministic latency. Use Value: 52.6 MHz registered operation ensures sub-20 ns jitter on 10 MHz test clocks; power-down mode reduces idle power during standby. |
Use Scenario: Controlling sequential power-up of isolated DC/DC rails and supervisory signals in Class II medical imaging subsystems. IC Role / Device Role / Timing Role: State-machine-based sequencing engine with watchdog timeout, fault latching, and reset coordination across multiple supplies. Use Value: Power-up reset guarantees known low-state initialization; pin-keeper prevents floating control lines during brown-out recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATF1502AS-10AI | Pin-compatible upgrade; 64 macrocells, 10 ns speed grade, same TQFP-44/PLCC-44 footprint | Higher density enables larger state machines; supports faster clock domains (up to 100 MHz) | Recommended when design requires >32 macrocells or tighter timing margins; retains identical PCB layout |
| XCR3256XL-10TQ144I | 3.3 V core/I/O, 256 macrocells, 144-pin TQFP; higher density but different voltage and package | Not drop-in; requires level-shifting and board redesign; suited for new 3.3 V designs with scalability needs | Consider only for greenfield 3.3 V systems where long-term availability and density outweigh legacy compatibility |
Compared with ATF1500A-15AI, ATF1502AS-10AI offers direct pin-compatible migration with doubled logic capacity and improved speed, while XCR3256XL-10TQ144I provides significantly greater scale at the cost of voltage and package incompatibility - making it unsuitable for drop-in replacement but viable for next-generation redesigns.
Availability
ATF1500A-15AI is available at Aetrix Electronics and suitable for industrial control, legacy test equipment, and medical device power sequencing requiring stable component supply through extended lifecycle management.
Supply support for ATF1500A-15AI 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 including the ATF1500A family with documentation, programming tools, and obsolescence mitigation.
The ATF1500A series was designed for 5 V system logic integration - targeting replacement of TTL, SSI/MSI, and older PLDs in industrial, test, and medical applications where Flash-based reprogrammability and industrial temperature operation are essential.
FAQ
What is the operating voltage range for ATF1500A-15AI?
The ATF1500A-15AI operates from 5 V ±10%, meaning 4.5 V to 5.5 V. This specification is validated for industrial temperature range (–40°C to +85°C) and ensures reliable functionality across unregulated 5 V rails common in legacy industrial systems. The ATF1500A-15AI does not support 3.3 V or mixed-voltage operation - all I/O and core logic require the same 5 V supply.
Does ATF1500A-15AI support in-system programming?
Yes, ATF1500A-15AI supports in-system programming via JTAG (IEEE 1149.1) using standard boundary-scan tools. Programming requires 12 V on the VPP pin during configuration, which is supplied externally by compatible programmers such as the Atmel ICE or third-party JTAG adapters with VPP capability. The ATF1500A-15AI retains its JEDEC fuse pattern after power cycle and supports full reprogramming without removal from the board.
What is the purpose of the PD pin on ATF1500A-15AI?
The PD (Power-Down) pin on ATF1500A-15AI enables a hardware-controlled low-power mode: when driven high, it reduces supply current to under 10 mA while latching all register and output states. During power-down, inputs (except PD) are ignored, and outputs remain valid or retain high-Z status. The PD function must be enabled in the design source file; once enabled, the PD pin cannot serve as a logic input or output, though its macrocell resources remain usable for foldback logic.
Can ATF1500A-15AI replace ATF1500AL-20AI in an existing design?
No - ATF1500A-15AI and ATF1500AL-20AI differ in core architecture and power behavior. The "A" suffix denotes standard power CPLD (100 mA standby), while "AL" indicates low-power variant (5 mA standby). Though both share pinout and logic structure, their ICC1 specifications and power-down thresholds are incompatible for direct substitution without validation of thermal and timing margins. ATF1500A-15AI is not a functional drop-in for ATF1500AL-20AI.
Is ATF1500A-15AI RoHS compliant?
Yes, ATF1500A-15AI is available in RoHS-compliant, lead-free, halide-free packaging - specifically the TQFP-44 (44A) and PLCC-44 (44J) green variants. These packages meet EU Directive 2011/65/EU and are marked with appropriate compliance identifiers in Microchip's ordering codes (e.g., ATF1500A-15AIU for green TQFP). Standard versions also comply but may carry legacy plating; green variants are recommended for new designs.
ATF1500A-15AI 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:
- 4.5V ~ 5.5V
- Number of Logic Elements/Blocks:
- -
- Number of Macrocells:
- 32
- Number of Gates:
- -
- Number of I/O:
- 32
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-TQFP (10x10)
ATF1500A-15AI FAQ
1.How can I place an order for ATF1500A-15AI through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1500A-15AI 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-15AI reliable?
The price and inventory of ATF1500A-15AI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1500A-15AI is usually 5 days.
3.What payment methods are accepted for ATF1500A-15AI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1500A-15AI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1500A-15AI?
ATF1500A-15AI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1500A-15AI 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-15AI?
For technical support, including ATF1500A-15AI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1500A-15AI requirements.
6.How does Aetrix verify that ATF1500A-15AI is sourced from the original manufacturer or authorized distributors?
All ATF1500A-15AI 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-15AI meets industry standards.
7.What is the process for return or replacement of ATF1500A-15AI?
All ATF1500A-15AI units undergo pre-shipment inspection (PSI). If there is an issue with ATF1500A-15AI, 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-15AI part is unused and in its original packaging.
Return procedure for ATF1500A-15AI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1500A-15AI 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…
