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Microchip Technology ATF1500A-7AC
- Part No.:
- ATF1500A-7AC
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1500A-7AC.pdf
- Description:
- IC CPLD 32MC 7.5NS 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,197
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Product details
Overview
ATF1500A-7AC from Atmel is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 32 macrocells, 32 I/O pins, and 4 dedicated input/control pins. It delivers 7.5 ns maximum pin-to-pin delay, supports registered operation up to 125 MHz (internal feedback), 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 TTL replacement.
For engineers reviewing the ATF1500A-7AC datasheet, ATF1500A-7AC pinout, ATF1500A-7AC application, or ATF1500A-7AC equivalent, this page provides verified package mapping (44-lead TQFP), confirmed pin functions (CLK, GCLR, OE1/OE2, PD), real AC timing values (tPD = 7.5 ns, fMAX = 95 MHz), and two validated alternative parts with documented functional and packaging differences.
Technical Context
The ATF1500A-7AC implements a fully connected global bus architecture feeding all 32 macrocells with 68-bit signal availability (I/O, dedicated inputs, buried feedback), enabling flexible logic placement without pinout changes. Its macrocell includes five product terms, OR/XOR/cascade logic, D/T/latch-configurable flip-flops, and programmable slew-rate outputs.
It features dual power management: automatic standby (not applicable to -7AC variant) and pin-controlled power-down via PD pin (active-high, <10 mA current draw). Pin-keeper circuits prevent floating I/Os, eliminating external pull-ups while maintaining signal integrity during inactive states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 32 macrocells with 5 product terms each, supporting up to 40-term sum logic via cascade chains |
| Max Pin-to-Pin Delay | 7.5 ns - determines minimum combinational path timing for synchronous design closure |
| Max Clock Frequency | 95 MHz (external feedback), 125 MHz (internal feedback) - sets upper limit for register-to-register throughput |
| I/O Count | 32 bi-directional I/O pins + 4 dedicated inputs (CLK, GCLR, OE1, OE2) - enables full-system glue logic integration |
| 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 - qualified for commercial-grade embedded systems, not industrial or automotive environments |
| Package | 44-lead TQFP (10 × 10 mm, 0.8 mm pitch) - surface-mount compatible with standard reflow profiles |
Pinout & Package
ATF1500A-7AC is housed in a 44-lead Thin Quad Flatpack (TQFP) with gull-wing leads, JEDEC MS-026 ACB-compliant, 10 mm × 10 mm body, 1.0 mm max height, and 0.8 mm lead pitch. Pin 1 identifier is a corner bevel or dot.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–11, 13–22, 24–33, 35–44 | I/O | Bi-directional logic buffers with programmable pin-keeper and slew-rate control |
| 12, 23, 34 | GND | Ground reference for core and I/O circuitry; three separate GND pins reduce noise coupling |
| 13, 26, 39 | VCC | +5V supply for core logic and I/O drivers; three VCC pins ensure low-impedance power delivery |
| CLK (Pin 22) | Global clock input | Rising-edge-triggered register clock; may be overridden by product-term clock in individual macrocells |
| GCLR (Pin 21) | Active-low global reset | Asynchronous clear for all registers; may be OR'd with product-term reset per macrocell |
| OE1/OE2 (Pins 19/20) | Active-low output enables | Global or macrocell-selectable output enable; allows mixed active/inactive I/O states on same device |
| PD (Pin 18) | Active-high power-down | Enters <10 mA standby when asserted; latches internal state and disables all inputs except PD |
Key Features
| Feature | Design Value |
|---|---|
| Programmable macrocell configuration | D/T/latch flip-flops, individual clock enable, and asynchronous preset/reset per macrocell enable precise state machine implementation |
| Global + regional bus architecture | 68-bit global bus + 16-signal regional buses eliminate routing congestion and allow design iteration without PCB respin |
| Pin-keeper circuitry | Prevents floating I/Os from drifting to indeterminate voltage, removing need for external pull-up resistors and reducing system noise |
| Output slew rate control | Per-I/O fast/slow edge selection reduces EMI on non-critical signals while preserving timing on high-speed paths |
| Flash-based reprogrammability | 100 program/erase cycles with 20-year data retention enables field updates and design validation iterations |
Applications
| Industrial Control Interface | Legacy TTL Logic Replacement |
|---|---|
Use Scenario: Replacing discrete 74-series logic in PLC I/O modules requiring deterministic timing and long-term availability. IC Role / Device Role / Timing Role: Glue logic consolidator handling address decoding, bus arbitration, and status flag generation with sub-10 ns propagation. Use Value: Reduces BOM count by >80%, eliminates inter-chip skew, and maintains compatibility with existing 5V CMOS/TTL signaling levels. |
Use Scenario: Migrating aging MSI designs (e.g., 74LS154 decoders, 74LS175 registers) in test equipment control boards. IC Role / Device Role / Timing Role: Drop-in logic function emulator with identical 5V supply, pin-compatible I/O drive strength, and guaranteed tPD ≤ 7.5 ns. Use Value: Preserves board layout while enabling in-system reconfiguration for future feature upgrades without hardware change. |
| Communications Protocol Bridge | Embedded System Boot Logic |
Use Scenario: Translating between UART handshaking signals and parallel memory-mapped control registers in modems. IC Role / Device Role / Timing Role: Synchronous interface adapter synchronizing asynchronous control lines (RTS/CTS) to CPU clock domain using registered I/O. Use Value: Eliminates metastability risk via built-in register stages and ensures setup/hold compliance across voltage domains. |
Use Scenario: Managing FPGA configuration sequencing and microcontroller reset coordination during power-on in medical devices. IC Role / Device Role / Timing Role: Power-up state manager asserting controlled reset pulses and enabling boot peripherals only after VCC stabilization. Use Value: Guarantees deterministic low-state initialization of all registers (tPR = 2–10 µs) and prevents race conditions in multi-chip boot sequences. |
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; higher density (48 macrocells); green RoHS package; 10 ns speed grade | Supports larger logic functions and industrial temp range (−40°C to +85°C); lacks ATF1500A-7AC's 7.5 ns speed grade | Select when upgrading legacy designs needing extended temperature support and additional macrocells without PCB change |
| XCR3064XL-10VQG44C | 64-macrocell CoolRunner-II CPLD; 3.3V core/I/O; 10 ns tPD; 44-pin VQFP package | Requires level-shifting for 5V systems; lower static power; no native 5V tolerance; different programming protocol | Select for new 3.3V designs prioritizing ultra-low power and longer program/erase endurance (>10,000 cycles) |
Compared with ATF1500A-7AC, ATF1502AS-10AU offers industrial temperature support and higher logic capacity in the same footprint but trades off 2.5 ns speed; XCR3064XL-10VQG44C enables modern low-voltage operation and superior power efficiency but mandates voltage translation and firmware toolchain migration.
Availability
ATF1500A-7AC is available at Aetrix Electronics and suitable for industrial control interfaces, legacy TTL replacement, communications protocol bridging, and embedded system boot logic requiring stable component supply and long-lifecycle support.
Supply support for ATF1500A-7AC 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) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and programmable logic devices.
The ATF1500A series was designed as a high-performance, Flash-based CPLD family targeting 5V logic consolidation in industrial, communications, and computing applications where reprogrammability and pin compatibility with legacy PLDs were critical.
FAQ
What is the maximum operating frequency of the ATF1500A-7AC?
The ATF1500A-7AC supports sequential logic operation up to 125 MHz when using internal feedback paths, and up to 95 MHz with external feedback. These values are measured under specified conditions (VCC = 5V ±5%, TA = 25°C) and reflect worst-case timing across the commercial temperature range (0°C to 70°C). The 7.5 ns pin-to-pin delay directly enables these frequencies in registered designs.
Does the ATF1500A-7AC support 3.3V I/O interfacing?
No, the ATF1500A-7AC is a 5V-only device. Its absolute maximum input voltage is +7.0V, but DC operating conditions require VCC = 5V ±5%, and VIH(min) = 2.0V with VOH(min) = 2.4V at IOH = −4 mA. Interfacing directly with 3.3V logic requires external level-shifting circuitry; it does not tolerate sustained 3.3V I/O signaling without risk of incorrect logic interpretation or reliability degradation.
How many macrocells and I/O pins does the ATF1500A-7AC have?
The ATF1500A-7AC contains 32 logic macrocells and provides 32 bi-directional I/O pins plus four dedicated input pins (CLK, GCLR, OE1, OE2). All 32 I/O pins support programmable pin-keeper and slew-rate control. The macrocell structure includes five product terms per cell, configurable flip-flops (D/T/latch), and cascaded logic chains supporting up to 40-product-term sum terms.
Is the ATF1500A-7AC still in production or obsolete?
The ATF1500A-7AC is listed as last-time-buy with end-of-life declared by Atmel (now Microchip) effective September 30, 2005. However, Aetrix Electronics maintains active inventory and traceable legacy sourcing for this part. For new designs, Microchip recommends ATF1502AS-10AU as the pin-compatible replacement with enhanced features and RoHS compliance.
What package type is used for the ATF1500A-7AC?
The ATF1500A-7AC is supplied exclusively in a 44-lead Thin Quad Flatpack (TQFP) package, designated as 44A per Atmel documentation. It measures 10 mm × 10 mm with 0.8 mm lead pitch, JEDEC MS-026 ACB-compliant, and features gull-wing leads suitable for standard SMT reflow processes. The PLCC (44J) variant exists for other speed grades but not for the -7AC ordering code.
ATF1500A-7AC 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:
- 7.5 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-7AC FAQ
1.How can I place an order for ATF1500A-7AC through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1500A-7AC 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-7AC reliable?
The price and inventory of ATF1500A-7AC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1500A-7AC is usually 5 days.
3.What payment methods are accepted for ATF1500A-7AC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1500A-7AC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1500A-7AC?
ATF1500A-7AC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1500A-7AC 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-7AC?
For technical support, including ATF1500A-7AC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1500A-7AC requirements.
6.How does Aetrix verify that ATF1500A-7AC is sourced from the original manufacturer or authorized distributors?
All ATF1500A-7AC 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-7AC meets industry standards.
7.What is the process for return or replacement of ATF1500A-7AC?
All ATF1500A-7AC units undergo pre-shipment inspection (PSI). If there is an issue with ATF1500A-7AC, 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-7AC part is unused and in its original packaging.
Return procedure for ATF1500A-7AC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1500A-7AC 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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