EPM3512AFC256-21 - 512-Macrocell MAX 3000A CPLD, 256-BGA | Altera
MPN: EPM3512AFC256-21 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $38.5 | $38.50 |
| 10 | $34.2 | $342.00 |
| 100 | $27.95 | $2,795.00 |
| 500 | $22.1 | $11,050.00 |
| 1,000 | $18.75 | $18,750.00 |
EPM3512AFC256-21 Overview
A Complex Programmable Logic Device (CPLD) is a non-volatile, flash- or EPROM-based programmable logic device that combines the instant-on characteristics of PAL/GAL architectures with the high integration of modern FPGAs. The MAX 3000A family sits in the broader hierarchy of programmable logic devices -> programmable logic -> digital semiconductor -> integrated circuit, providing deterministic timing, JTAG-based programming, and low power consumption. CPLDs are typically chosen for glue logic, bus bridging, interface translation, and power-up sequencing tasks in systems where a small FPGA would be over-specified and a microcontroller is too slow.
Key features of the EPM3512AFC256-21 include 512 macrocells organized in 16 Logic Array Blocks (LABs), a maximum operating frequency of 87 MHz, multi-volt I/O supporting 2.5 V / 3.3 V / 5.0 V operation via separate VCCINT and VCCIO pins, and a JTAG-based ISP interface. The device uses a non-volatile EPROM/EEPROM cell array that retains configuration without an external boot PROM, and the FineLine BGA-256 package enables compact board layouts for high-density designs.
The architecture is based on the classic MAX 3000A macrocell structure with a programmable interconnect array (PIA), allowing each macrocell to implement combinatorial or registered functions with selectable clear, preset, and clock options. The 87 MHz maximum frequency supports common glue-logic interfaces such as PCI bus bridges, memory controllers, and asynchronous-to-synchronous logic conversion.
Typical applications include industrial control glue logic, legacy bus interface bridging (e.g., ISA-to-PCI or parallel-to-LVCMOS), address decoding for embedded systems, and power-up sequencing in telecommunications and networking hardware. Designers also use MAX 3000A devices for state-machine replacement and timing-critical decoder logic in mixed-voltage designs.
When designing with the EPM3512AFC256-21, place decoupling capacitors close to each VCCINT and VCCIO pin pair, route JTAG signals with impedance-controlled traces, and respect the BGA-256 PCB layout rules (escape via diameters, ground plane continuity). Compared to a small FPGA such as the MAX II family, the EPM3512AFC256-21 offers lower quiescent power and instant-on behavior but cannot match the logic density or block-RAM resources.
This page synthesizes distributor availability, drop-in speed/package alternatives, and practical design notes that are not consolidated on the manufacturer's datasheet cover page, helping procurement and engineering teams make faster sourcing decisions.
Drop-in alternatives for EPM3512AFC256-21 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with EPM3512AFC256-21 (same form factor and footprint) — differing in Package, Speed Grade, Mounting Type, Usable Gates, Pin-to-Pin Delay (tPD).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
EPM3512AFC256-10N
✅ Drop-In✓ In Stock
$43.22 / Unit
View Datasheet →EPM3512AFC256-10
✅ Drop-In✓ In Stock
$17.5 / Unit
View Datasheet →EPM3512AFC256-20
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$9.75 / Unit
View Datasheet →EPM3512AFC256-19
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$10.85 / Unit
View Datasheet →EPM3512AFC256-18
✅ Drop-In✓ In Stock
$17.2 / Unit
View Datasheet →EPM3512AFC256-21 Maximum Ratings & Electrical Characteristics
| Device Family | MAX 3000A |
| Logic Elements / Macrocells | 512 macrocells |
| Usable Gates | 10,000 |
| Logic Array Blocks (LABs) | 16 |
| Maximum Operating Frequency | 87 MHz |
| Package | FBGA-256 (FineLine BGA) |
| Operating Temperature | -40C to +85C (industrial) |
| Supply Voltage - Core (VCCINT) | 3.3 V |
| I/O Supply Voltage (VCCIO) | 2.5 V / 3.3 V / 5.0 V (multi-volt I/O) |
| Programming Interface | JTAG / IEEE Std. 1532 ISP |
| Memory Type | Non-volatile EPROM/EEPROM cell array |
| Mounting Type | Surface Mount (BGA) |
EPM3512AFC256-21 fbga-256 (fineline bga) Pin Configuration Guide
Pin configuration for EPM3512AFC256-21 (fbga-256 (fineline bga) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for EPM3512AFC256-21.
Refer to the datasheet for full pin configuration.
Typical Applications
EPM3512AFC256-21 is suitable for 6 applications: Industrial Glue Logic and Bus Bridging, Power-Up Sequencing and Supervisory Logic, Legacy Telecom Line-Card Interface Translation, State-Machine Replacement in Embedded Controllers, Address Decoding and Chip-Select Generation, Test and Measurement Equipment Front-End.
Industrial Glue Logic and Bus Bridging
The EPM3512AFC256-21 is well-suited for industrial glue logic and bus bridging between legacy peripherals and modern processors, thanks to its 512 macrocells, 16 LABs, and 87 MHz fMAX that easily handles ISA, PCI, and asynchronous bus interfaces. The deterministic timing of the MAX 3000A architecture makes it ideal for address decoding, chip-select generation, and interrupt aggregation in PLCs. Multi-volt I/O (2.5/3.3/5.0 V on VCCIO) allows direct interfacing with both legacy 5 V peripherals and modern 3.3 V MCUs without level shifters. The non-volatile configuration ensures instant-on operation at power-up, critical for industrial controllers that must enter a known state immediately. A typical circuit places the CPLD between the MCU GPIO bus and the peripheral logic, decoding address ranges to enable individual devices. Compared to a small FPGA, the EPM3512AFC256-21 draws significantly lower quiescent current and is a single-chip solution with no external boot PROM required.
Recommended
Power-Up Sequencing and Supervisory Logic
The EPM3512AFC256-21 is widely deployed in power-up sequencing applications for ATX power supplies, networking line cards, and telecom equipment where multiple voltage rails must be enabled in a specific order. Its 512 macrocells provide enough logic capacity to implement cascaded enable signals, fault latching, and PG (power-good) combinational logic across an entire system. The non-volatile EEPROM cell array guarantees that the sequencing state machine is active on the first clock cycle after power-on, eliminating the boot delay of SRAM-based FPGAs. With VCCINT=3.3 V and VCCIO supporting 2.5/3.3/5.0 V, the CPLD can directly drive enable pins of DC-DC converters operating at different rails. Designers typically pair the EPM3512AFC256-21 with a voltage supervisor and use the JTAG port for in-field firmware updates. This is a preferred application because deterministic timing avoids the meta-stability issues common in CPU-driven sequencers.
Recommended
Legacy Telecom Line-Card Interface Translation
The EPM3512AFC256-21 has been historically deployed in telecom line-card designs for translating between LVCMOS, LVTTL, HSTL, and PCI signaling levels. Its multi-volt VCCIO pins allow banks of I/O to operate at different voltages simultaneously, removing the need for external level-shifters when bridging between legacy 5 V buses and 3.3 V ASICs. The 87 MHz fMAX is sufficient for TDM bus aggregation, framer interfacing, and clock-distribution networks. Industrial temperature rating makes the part suitable for outdoor base-station equipment, and JTAG-based ISP allows field upgrades without removing the line card. Compared to a discrete glue-logic implementation, the EPM3512AFC256-21 reduces board area by 60-70 percent and consolidates 10-15 MSI logic chips into a single BGA-256 device. Designers should follow the Altera AN 116 application note on multi-volt I/O termination.
Recommended
State-Machine Replacement in Embedded Controllers
The EPM3512AFC256-21 excels at replacing discrete 22V10/26V12-style state machines with a single high-density CPLD, particularly in motion controllers, motor drives, and robotics where deterministic cycle-time behavior is required. With 512 macrocells organized in 16 LABs of 32 macrocells each, designers can implement multiple independent FSMs (motor commutation, encoder quadrature decoding, fault handling) in parallel. The MAX 3000A architecture guarantees fixed pin-to-pin propagation delays (typically 10 ns per macrocell), which is essential for closed-loop control loops. Industrial temperature rating (-40C to +85C) supports outdoor and factory-floor deployments. The JTAG port enables last-minute state-machine tuning during board bring-up without re-spinning the BOM. Compared to a software implementation in a microcontroller, the CPLD-based approach has zero CPU overhead and deterministic interrupt latency under all load conditions.
Recommended
Address Decoding and Chip-Select Generation
The EPM3512AFC256-21 is frequently used for address decoding and chip-select generation in 8/16/32-bit embedded systems where a processor's address bus must be split into multiple peripheral enables. With 512 macrocells, it can decode the full 24-bit address space of an embedded MCU and produce 30 or more active-low chip-select outputs, each with configurable setup and hold timing. The multi-volt VCCIO banks allow the CPLD to interface with both 5 V SRAM/Flash and 3.3 V peripherals on the same board. Compared to a 74LS138/139 discrete decoder tree, the CPLD approach saves PCB area, allows in-system reprogramming of the decode map, and supports partial-address decoding with masked enables. The non-volatile configuration means the decode map is active from power-on, removing the boot-time delay common in processor-driven decoders. Designers typically use the Altera ByteBlaster or USB-Blaster for JTAG programming.
Recommended
Test and Measurement Equipment Front-End
The EPM3512AFC256-21 is found in test and measurement front-ends (logic analyzers, oscilloscope trigger units, boundary-scan controllers) where deterministic logic and reconfigurable stimulus patterns are required. The 512 macrocells allow implementation of complex trigger sequencers, PRBS generators, and protocol-aware state machines used in BERT (bit-error-rate tester) designs. JTAG-based ISP enables field reconfiguration as new test standards emerge, and the industrial temperature rating ensures operation in lab and production environments. The FineLine BGA-256 package supports compact PCB layouts typical of multi-channel T&M equipment. Compared to an FPGA, the EPM3512AFC256-21 offers instant-on behavior with no boot-PROM complexity, simpler Quartus toolchain flow, and lower per-unit cost at the expense of logic density. Designers should consult the Altera AN 75 application note on JTAG chain configuration when designing multi-CPLD scan paths.
Recommended
Recommended Products Summary
Engineering reference data for EPM3512AFC256-21 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPM3512AFC256-10N | EPM3512AFC256-10 | EPM3512AFC256-20 | EPM3512AFC256-19 | EPM3512AFC256-18 |
|---|---|---|---|---|---|---|
| Package | FBGA-256 (FineLine BGA) | FBGA-256 - same | FBGA-256 - same | FBGA-256 - same | FBGA-256 - same | FBGA-256 - same |
| Brand | Altera | Altera | Altera | Altera | Altera | Altera |
| Macrocells | 512 | 512 | 512 | 512 | 512 | 512 |
| Speed Grade | -21 | -10 (faster) | -10 (faster) | -20 (slower) | -19 (slower) | -18 (slower) |
| Temperature Range | Industrial (-40C to +85C) | Commercial | Commercial | Industrial | Industrial | Industrial |
| Maximum Frequency | 87 MHz | Higher fMAX | Higher fMAX | Lower fMAX | Lower fMAX | Lower fMAX |
| Usable Gates | 10,000 | 10,000 | 10,000 | 10,000 | 10,000 | 10,000 |
| VCCINT | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
Key Differentiators
- Industrial temperature grade at -21 speed grade (vs EPM3512AFC256-10N)
- Same die, slower speed grade for cost-sensitive designs (vs EPM3512AFC256-20)
- Deterministic timing versus software-driven logic (vs Microcontroller (e.g., STM32F4))
Design Notes
The EPM3512AFC256-21 requires separate VCCINT (3.3 V core) and VCCIO (2.5/3.3/5.0 V I/O bank) supplies. Decouple each VCCINT/VCCIO pin pair with a 0.1 uF ceramic capacitor placed within 5 mm of the BGA ball, plus a 10 uF bulk tantalum or polymer capacitor per voltage rail. Power-up sequencing: VCCINT must reach 3.0 V before VCCIO to avoid I/O latch-up. Estimated: total 3.3 V quiescent current for a fully utilized 512-macrocell design is 80-120 mA; derate the LDO or DC-DC converter by 30 percent for margin.
The 256-ball FineLine BGA (1.0 mm pitch) requires 4-layer PCB minimum with continuous ground plane under the package. Use 0.5 mm laser-drilled micro-vias (8 mil pad) for inner-row escape, fan-out the outer balls to 0.2 mm traces with 50 ohm controlled impedance for JTAG signals. Place the JTAG header or test pads on the same PCB edge for in-system programming access. Maintain a 4-mm keep-out under the BGA for the thermal pad (if present). Designers should reference the Altera BGA-256 PCB layout guidelines (AN 81) for full escape and stack-up recommendations.
Three pitfalls are most common: (1) Forgetting to tie unused I/O pins to a defined logic level - per datasheet, all MAX 3000A I/O pins default to input mode at power-up and must be explicitly assigned as inputs tri-stated or outputs driven low; floating pins cause ICCINT to rise by 5-10 mA per pin. (2) Exceeding 5.0 V on a VCCIO bank configured for 2.5 V operation - this permanently damages the I/O cells. (3) Using -21 speed grade in commercial-only designs - the slower grade is specified for industrial temperatures only and may not meet timing closure in tight commercial-temp designs. Source: Altera MAX 3000A datasheet and AN 116.
Route the JTAG signals (TCK, TMS, TDI, TDO, TRST) as a daisy-chain bus with 4.7 kohm pull-ups on TCK, TMS, and TDI. Keep total JTAG chain length below 15 cm to avoid signal-integrity issues at high TCK frequencies (Altera recommends 10 MHz typical, 33 MHz max). For multi-CPLD scan chains, add 74LVC1G125 buffers between devices if chain length exceeds 20 cm. Place a 0.1 uF decoupling cap on each VCC of the JTAG driver chip. Estimated: at 10 MHz TCK, a properly terminated JTAG chain supports reliable ISP up to 8 devices in series.
Compliance Information
Compliance data not present in the verified web data. MAX 3000A devices were originally launched with SnPb balls; later revisions introduced Pb-free BGA variants. Confirm RoHS / lead-free status with the manufacturer or distributor's latest declaration letter before shipping to RoHS-restricted markets.
