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Microchip Technology ATF1502ASV-20AC44
- Part No.:
- ATF1502ASV-20AC44
- Manufacturer:
- Microchip Technology
- Package:
- 44-TQFP
- Datasheet:
-
ATF1502ASV-20AC44.pdf
- Description:
- IC CPLD 32MC 20NS 44TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ATF1502ASV-20AC44 from Microchip Technology (formerly Atmel) is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) with 32 macrocells, 5 base product terms per macrocell (expandable to 40), 44-pin TQFP package, 20 ns maximum pin-to-pin delay, and operation up to 83.3 MHz in commercial temperature range (0°C to 70°C). It integrates legacy TTL/SSI/MSI logic and supports in-system programming via IEEE 1149.1 JTAG for field-upgradable control logic in industrial I/O modules.
For engineers reviewing the ATF1502ASV-20AC44 datasheet, ATF1502ASV-20AC44 pinout, ATF1502ASV-20AC44 application, or ATF1502ASV-20AC44 equivalent, this device delivers deterministic timing for synchronous state machines, supports PCI-compliant interfaces, enables pin-keeper and slew-rate-controlled I/Os, and provides programmable power-down with sub-5 mA standby current - critical for embedded control and board-level logic consolidation.
Technical Context
The ATF1502ASV-20AC44 implements a global bus architecture feeding up to 40 signals into each logic block's switch matrix, with regional foldback buses enabling high-fan-in sum-term generation (up to 40 product terms via cascade logic across four chains). Its macrocell structure includes configurable D/T-latch flip-flops, XOR-based arithmetic/comparison logic, and buried registered feedback independent of output mode.
It supports three global clock inputs (GCLK1–3), individual macrocell power reduction, programmable pin-keeper on all I/Os, and JTAG boundary-scan compliant with IEEE 1149.1a-1993. The -20 speed grade guarantees tPD1 ≤ 20 ns (input to non-registered output) and fCNT ≤ 16 ns minimum global clock period at 3.0–3.6 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Density | 32 macrocells - sufficient for replacing multiple 74-series ICs or classic PLDs in glue logic applications |
| Speed Grade | -20: 20 ns max pin-to-pin delay, 83.3 MHz max clock frequency - meets timing closure for 25 MHz system clocks with margin |
| Operating Voltage | 3.0–3.6 V - compatible with 3.3 V LVTTL/LVCMOS I/O domains without level translation |
| Temperature Range | Commercial (0°C to +70°C) - validated for office, lab, and non-extreme industrial environments |
| Package | 44-lead TQFP (44A) - surface-mount, 10 mm × 10 mm footprint, 0.8 mm pitch, RoHS-compliant |
| Programmability | In-system programmable (ISP) via 4-pin JTAG - enables firmware updates without device removal or socketing |
| Power Management | 0.75 mA standby (pin-controlled), per-macrocell reduced-power bit, and PD1/PD2 power-down pins - reduces active current by >40% in idle states |
Pinout & Package
ATF1502ASV-20AC44 is packaged in a 44-lead Thin Quad Flat Package (TQFP, code 44A), measuring 10 mm × 10 mm with 0.8 mm lead pitch and exposed thermal pad (non-electrical). Pin assignment follows JEDEC MO-153, with dedicated global control pins (GCLK1–3, GCLR, OE1/OE2), two power-down pins (PD1, PD2), four JTAG pins (TDI, TMS, TCK, TDO), four ground pins (GND), and four VCC pins (VCCI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 26, 32 | TDI / TMS / TCK / TDO | JTAG boundary-scan and ISP interface - reserved during programming; usable as I/O if JTAG disabled in design |
| 4, 16, 24, 36 | GND | Ground reference for logic and I/O - decoupling required at each VCC/GND pair |
| 9, 17, 29, 41 | VCCI | 3.3 V core and I/O supply - must be independently decoupled with 0.1 µF ceramic capacitors |
| 5, 19 | PD1 / PD2 | Active-high power-down control - asserts low-power mode (<5 mA ICC2); disables input sampling but retains register state |
| 37, 39, 40, 38 | GCLK1 / GCLR / OE2 / OE1 | Global clock, asynchronous clear, and output enable - configurable per macrocell for flexible timing control |
| 35 | GCLK3 / I/O | Third global clock input or bidirectional I/O - supports clock domain crossing when used as input |
Key Features
| Feature | Design Value |
|---|---|
| Programmable slew rate | Per-output fast/slow switching selection - reduces EMI and signal integrity issues on long traces without external termination |
| Pin-keeper circuitry | Configurable on all inputs/I/Os - eliminates need for external pull-ups, prevents floating inputs, and cuts leakage-induced noise |
| Buried registered feedback | Independent of output configuration - enables dual-latch behavior within one macrocell for compact state machine implementation |
| Three global clock inputs | GCLK1–3 support multi-domain synchronous logic - allows separate clocks for control, data, and interface logic without external muxing |
| Security fuse & User Signature | One-time programmable security fuse blocks readback; 16-bit user-accessible signature stores revision/date for traceability |
Applications
| Industrial PLC I/O Expansion | PCI Bus Glue Logic |
|---|---|
Use Scenario: Adding isolated digital input/output channels to a programmable logic controller rack with space-constrained PCB layout. IC Role / Device Role / Timing Role: Replaces discrete 74HC573 latches, 74HC138 decoders, and 74HC244 buffers with single-cycle combinational and registered logic. Use Value: Reduces BOM count by 70%, eliminates timing skew between parallel I/O paths, and enables field reconfiguration of signal routing via ISP. |
Use Scenario: Interfacing custom ASICs or FPGAs to legacy PCI 2.2-compliant host bridges in test equipment. IC Role / Device Role / Timing Role: Implements address decoding, bus arbitration, and ready/wait handshaking with sub-20 ns setup/hold compliance. Use Value: Meets PCI timing requirements (tSU = 16 ns min, tH = 0 ns) without external delay elements; supports 33 MHz synchronous transfers. |
| Automated Test Equipment (ATE) Control Sequencer | Legacy System Emulation |
Use Scenario: Generating precise, synchronized stimulus patterns for semiconductor wafer probing with nanosecond-level edge alignment. IC Role / Device Role / Timing Role: Serves as deterministic state sequencer with registered outputs driving high-speed comparators and DAC triggers. Use Value: Achieves 83.3 MHz internal clocking and 20 ns pin-to-pin delay - ensures <±1 ns jitter on critical trigger edges. |
Use Scenario: Replacing obsolete PAL/GAL devices in avionics maintenance test sets where original parts are no longer available. IC Role / Device Role / Timing Role: Emulates exact pinout and Boolean logic of AMD 22V10 or National Semiconductor MM5790 with identical propagation delays. Use Value: Enables drop-in replacement without PCB redesign; preserves legacy test software compatibility through identical functional behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPLD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XCR3064XL-10VQ44C | 64 macrocells, 10 ns speed, 2.7–3.6 V supply, CoolRunner-II architecture with lower static current (10 µA) | Higher density and lower power, but lacks pin-keeper and dedicated power-down pins | Select for battery-powered or ultra-low-quiescent designs where macrocell count exceeds 32; verify JTAG pin compatibility |
| LC4032V-75TN44C | 32 macrocells, 7.5 ns speed, 3.3 V only, ispMACH 4000 family with enhanced routing and 1.8 V I/O option | Faster timing and wider voltage tolerance, but requires different programming tools and lacks PCI compliance | Select when >100 MHz operation is needed or when interfacing with mixed-voltage systems (1.8/3.3 V); confirm toolchain support |
Compared with XCR3064XL-10VQ44C and LC4032V-75TN44C, the ATF1502ASV-20AC44 offers unique pin-keeper functionality and explicit PCI compliance - making it preferable for cost-sensitive, pin-compatible replacements in legacy industrial control boards where board space and firmware compatibility are constrained.
Availability
ATF1502ASV-20AC44 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and legacy system upgrades requiring stable component supply, long-term lifecycle support, and verified RoHS-compliant sourcing.
Supply support for ATF1502ASV-20AC44 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 full technical support, documentation, and programming tool compatibility for the ATF1502ASV family.
The ATF1502ASV series was designed for high-reliability, in-system programmable glue logic in industrial and communications equipment - emphasizing deterministic timing, JTAG testability, and long-lifecycle availability over raw density.
FAQ
What is the maximum operating frequency of the ATF1502ASV-20AC44?
The ATF1502ASV-20AC44 supports a maximum internal global clock frequency of 83.3 MHz, corresponding to a minimum clock period of 16 ns. This is guaranteed under commercial temperature conditions (0°C to +70°C) and 3.0–3.6 V supply. Registered logic paths achieve this performance with tCNT = 16 ns max, while combinatorial paths meet tPD1 ≤ 20 ns. The ATF1502ASV-20AC44 achieves this using three dedicated global clock inputs and optimized macrocell routing.
Does the ATF1502ASV-20AC44 support in-system programming (ISP)?
Yes, the ATF1502ASV-20AC44 fully supports in-system programming via the IEEE 1149.1 JTAG interface using TDI, TMS, TCK, and TDO pins. Programming can be performed without removing the device from the PCB, enabling field firmware updates and rapid prototyping. The ATF1502ASV-20AC44 also supports Serial Vector Format (SVF) files for integration with automated test equipment. When JTAG is disabled in the design, those four pins become available as general-purpose I/O.
What power-saving features does the ATF1502ASV-20AC44 offer?
The ATF1502ASV-20AC44 includes pin-controlled power-down mode (via PD1/PD2), per-macrocell reduced-power bits, and programmable pin-keeper circuits. In power-down mode, supply current drops to ≤5.0 mA (ICC2), and all register states are retained. The pin-keeper eliminates external pull-up resistors and associated DC power loss. Each macrocell's reduced-power bit further cuts active current by disabling unused logic paths - collectively reducing total ICC by >40% in typical control logic applications.
Is the ATF1502ASV-20AC44 RoHS compliant?
Yes, the ATF1502ASV-20AC44 is manufactured in a green, halide-free, lead-free (Pb-free) package compliant with RoHS Directive 2011/65/EU. The "C" suffix in the part number denotes commercial temperature grade and RoHS-compliant packaging. Microchip confirms full compliance for this variant, including 2000V HBM ESD protection and 200 mA latch-up immunity - meeting industrial reliability standards without hazardous substances.
Can the ATF1502ASV-20AC44 replace older PAL/GAL devices?
Yes, the ATF1502ASV-20AC44 is widely used as a drop-in replacement for obsolete PAL16L8, GAL16V8, and GAL22V10 devices in legacy systems. Its 32 macrocells, 44-pin TQFP footprint, and 5–40 product term flexibility match or exceed classic PLD capabilities. With ISP support and identical timing behavior (e.g., tPD ≤ 20 ns), the ATF1502ASV-20AC44 enables direct PCB reuse while adding modern features like JTAG testing and power management - preserving system functionality without redesign.
ATF1502ASV-20AC44 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATF15xx
- Package/Case:
- 44-TQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Verified
- Programmable Type:
- In System Programmable (min 10K program/erase cycles)
- Delay Time tpd(1) Max:
- 20 ns
- Voltage Supply - Internal:
- 3V ~ 3.6V
- 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)
ATF1502ASV-20AC44 FAQ
1.How can I place an order for ATF1502ASV-20AC44 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATF1502ASV-20AC44 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 ATF1502ASV-20AC44 reliable?
The price and inventory of ATF1502ASV-20AC44 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF1502ASV-20AC44 is usually 5 days.
3.What payment methods are accepted for ATF1502ASV-20AC44?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF1502ASV-20AC44 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATF1502ASV-20AC44?
ATF1502ASV-20AC44 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATF1502ASV-20AC44 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 ATF1502ASV-20AC44?
For technical support, including ATF1502ASV-20AC44 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF1502ASV-20AC44 requirements.
6.How does Aetrix verify that ATF1502ASV-20AC44 is sourced from the original manufacturer or authorized distributors?
All ATF1502ASV-20AC44 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 ATF1502ASV-20AC44 meets industry standards.
7.What is the process for return or replacement of ATF1502ASV-20AC44?
All ATF1502ASV-20AC44 units undergo pre-shipment inspection (PSI). If there is an issue with ATF1502ASV-20AC44, 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 ATF1502ASV-20AC44 part is unused and in its original packaging.
Return procedure for ATF1502ASV-20AC44:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATF1502ASV-20AC44 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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