EPM3256ATC144-10N - 256-Macro CPLD, 10ns, 144-TQFP | Altera
Référence : EPM3256ATC144-10N ⚠ Dernier achat| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $24.8 | $24,80 |
| 10 | $22.5 | $225,00 |
| 100 | $19.2 | $1 920,00 |
| 500 | $16.85 | $8 425,00 |
| 1 000 | $14.5 | $14 500,00 |
EPM3256ATC144-10N Présentation
A Complex Programmable Logic Device (CPLD) is a non-volatile programmable logic device that sits between discrete logic gates and FPGAs in the programmable logic hierarchy. Compared to FPGAs, CPLDs are deterministic, have predictable timing, instant-on configuration (no external boot device required), and higher pin-to-pin performance for glue-logic and interface bridging. The MAX 3000A family uses a classic EE (EEPROM) configuration cell that retains the design without power, a key advantage over SRAM-based FPGAs in industrial and automotive applications.
Key features of the EPM3256ATC144-10N include 5,000 usable gates, sixteen 36-by-36-bit Logic Array Blocks (LABs), a global Clear and three global Clock pins, programmable interconnect, and user-configurable I/O standards with slew-rate control. The 144-pin TQFP package (ATC) supports surface-mount assembly and provides generous I/O for bus-intensive bridging and state-machine control tasks.
Typical applications include bus-interface bridging (e.g., legacy 5 V/3.3 V glue logic), peripheral I/O expansion for microcontrollers, state-machine controllers in industrial control, address decoding in memory subsystems, and configurable peripheral replacement in telecom and instrumentation equipment. Designers use MAX 3000A devices when deterministic timing and instant-on non-volatile configuration outweigh the larger logic capacity of an FPGA.
When designing with this CPLD, ensure the Quartus II design tool is used (legacy support) and that the JTAG chain is correctly ordered with TMS/TCK/TDO/TDI. Decoupling: place 0.1 µF and 10 µF capacitors close to every VCC pin to suppress switching noise on the 3.3 V rail.
Alternatives de remplacement direct pour EPM3256ATC144-10N — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec EPM3256ATC144-10N (même facteur de forme et même empreinte) — différant par Package, Operating Temperature, Propagation Delay (tPD), Usable Gates, RoHS Status.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
EPM3256ATC144-7N
✅ Remplacement direct✓ En stock
$17.2 / unité
Voir la fiche technique →EPM3256ATC144-10
✅ Remplacement direct✓ En stock
$9.75 / unité
Voir la fiche technique →EPM3256ATC144-10AA
✅ Remplacement direct✓ En stock
$11.6 / unité
Voir la fiche technique →EPM3256ATC100-10N
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
EPM7256AETC144-10N
✅ Remplacement direct✓ En stock
$15.95 / unité
Voir la fiche technique →EPM3128ATC144-10N
✅ Remplacement direct✓ En stock
$6.56 / unité
Voir la fiche technique →EPM3256ATC144-10N Valeurs maximales et caractéristiques électriques
| Series | MAX 3000A |
| Device Type | CPLD (Complex Programmable Logic Device) |
| Macro Cells | 256 |
| Usable Gates | 5,000 (up to 10,000 usable in family) |
| Number of I/Os | 116 |
| Number of Logic Elements / Blocks | 16 LABs |
| Supply Voltage (VCCINT) | 3.3 V |
| Propagation Delay (tPD) | 10 ns |
| Maximum Counter Frequency | 227.3 MHz |
| Global Clocks | 3 |
| Global Clear / OE | Yes (1 global clear, 1 global OE) |
| Program Memory Type | EEPROM (non-volatile, in-system programmable) |
| JTAG Support | IEEE Std. 1149.1 with pin-locking |
| ISP Compliance | IEEE Std. 1532 |
| Boundary-Scan Test (BST) | Built-in, IEEE 1149.1 compliant |
| Boîtier | 144-LQFP (TQFP, ATC suffix) |
| Type de montage | Surface Mount |
Configuration des broches de EPM3256ATC144-10N
| Broche 1 | GCLK1 — Global clock input 1 |
| Broche 2 | GCLK2 — Global clock input 2 |
| Broche 3 | I/O — User I/O pin (macrocell I/O) |
| Broche 4 | I/O — User I/O pin (macrocell I/O) |
| Broche 5 | VCCINT — 3.3 V core supply |
| Broche 6 | GND — Ground |
| Broche 7 | I/O — User I/O pin |
| Broche 8 | I/O — User I/O pin |
| Broche 9 | I/O — User I/O pin |
| Broche 10 | I/O — User I/O pin |
| Broche 11 | I/O — User I/O pin |
| Broche 12 | VCCIO — 3.3 V I/O supply |
| Broche 13 | I/O — User I/O pin |
| Broche 14 | I/O — User I/O pin |
| Broche 15 | I/O — User I/O pin |
| Broche 16 | I/O — User I/O pin |
| Broche 17 | GND — Ground |
| Broche 18 | I/O — User I/O pin |
| Broche 19 | I/O — User I/O pin |
| Broche 20 | I/O — User I/O pin |
| Broche 21 | I/O — User I/O pin |
| Broche 22 | VCCINT — 3.3 V core supply |
| Broche 23 | I/O — User I/O pin |
| Broche 24 | I/O — User I/O pin |
| Broche 25 | I/O — User I/O pin |
| Broche 26 | I/O — User I/O pin |
| Broche 27 | GND — Ground |
| Broche 28 | I/O — User I/O pin |
| Broche 29 | I/O — User I/O pin |
| Broche 30 | I/O — User I/O pin |
| Broche 31 | I/O — User I/O pin |
| Broche 32 | VCCIO — 3.3 V I/O supply |
| Broche 33 | I/O — User I/O pin |
| Broche 34 | I/O — User I/O pin |
| Broche 35 | I/O — User I/O pin |
| Broche 36 | I/O — User I/O pin |
| Broche 37 | GND — Ground |
| Broche 38 | I/O — User I/O pin |
| Broche 39 | I/O — User I/O pin |
| Broche 40 | I/O — User I/O pin |
| Broche 41 | I/O — User I/O pin |
| Broche 42 | VCCINT — 3.3 V core supply |
| Broche 43 | I/O — User I/O pin |
| Broche 44 | I/O — User I/O pin |
| Broche 45 | I/O — User I/O pin |
| Broche 46 | I/O — User I/O pin |
| Broche 47 | GND — Ground |
| Broche 48 | I/O — User I/O pin |
| Broche 49 | I/O — User I/O pin |
| Broche 50 | I/O — User I/O pin |
| Broche 51 | I/O — User I/O pin |
| Broche 52 | VCCIO — 3.3 V I/O supply |
| Broche 53 | I/O — User I/O pin |
| Broche 54 | I/O — User I/O pin |
| Broche 55 | I/O — User I/O pin |
| Broche 56 | I/O — User I/O pin |
| Broche 57 | GND — Ground |
| Broche 58 | I/O — User I/O pin |
| Broche 59 | I/O — User I/O pin |
| Broche 60 | I/O — User I/O pin |
| Broche 61 | I/O — User I/O pin |
| Broche 62 | VCCINT — 3.3 V core supply |
| Broche 63 | I/O — User I/O pin |
| Broche 64 | I/O — User I/O pin |
| Broche 65 | I/O — User I/O pin |
| Broche 66 | I/O — User I/O pin |
| Broche 67 | GND — Ground |
| Broche 68 | I/O — User I/O pin |
| Broche 69 | I/O — User I/O pin |
| Broche 70 | I/O — User I/O pin |
| Broche 71 | I/O — User I/O pin |
| Broche 72 | VCCIO — 3.3 V I/O supply |
| Broche 73 | I/O — User I/O pin |
| Broche 74 | I/O — User I/O pin |
| Broche 75 | I/O — User I/O pin |
| Broche 76 | I/O — User I/O pin |
| Broche 77 | GND — Ground |
| Broche 78 | I/O — User I/O pin |
| Broche 79 | I/O — User I/O pin |
| Broche 80 | I/O — User I/O pin |
| Broche 81 | I/O — User I/O pin |
| Broche 82 | VCCINT — 3.3 V core supply |
| Broche 83 | I/O — User I/O pin |
| Broche 84 | I/O — User I/O pin |
| Broche 85 | I/O — User I/O pin |
| Broche 86 | I/O — User I/O pin |
| Broche 87 | GND — Ground |
| Broche 88 | I/O — User I/O pin |
| Broche 89 | I/O — User I/O pin |
| Broche 90 | I/O — User I/O pin |
| Broche 91 | I/O — User I/O pin |
| Broche 92 | VCCIO — 3.3 V I/O supply |
| Broche 93 | I/O — User I/O pin |
| Broche 94 | I/O — User I/O pin |
| Broche 95 | I/O — User I/O pin |
| Broche 96 | I/O — User I/O pin |
| Broche 97 | GND — Ground |
| Broche 98 | I/O — User I/O pin |
| Broche 99 | I/O — User I/O pin |
| Broche 100 | I/O — User I/O pin |
| Broche 101 | I/O — User I/O pin |
| Broche 102 | VCCINT — 3.3 V core supply |
| Broche 103 | I/O — User I/O pin |
| Broche 104 | I/O — User I/O pin |
| Broche 105 | I/O — User I/O pin |
| Broche 106 | I/O — User I/O pin |
| Broche 107 | GND — Ground |
| Broche 108 | I/O — User I/O pin |
| Broche 109 | I/O — User I/O pin |
| Broche 110 | I/O — User I/O pin |
| Broche 111 | I/O — User I/O pin |
| Broche 112 | VCCIO — 3.3 V I/O supply |
| Broche 113 | I/O — User I/O pin |
| Broche 114 | I/O — User I/O pin |
| Broche 115 | TDI — JTAG Test Data In |
| Broche 116 | TMS — JTAG Test Mode Select |
| Broche 117 | TCK — JTAG Test Clock |
| Broche 118 | TDO — JTAG Test Data Out |
| Broche 119 | GCLRn — Global Clear (active low) |
| Broche 120 | OE1 — Global Output Enable 1 |
| Broche 121 | GND — Ground |
| Broche 122 | I/O — User I/O pin |
| Broche 123 | I/O — User I/O pin |
| Broche 124 | I/O — User I/O pin |
| Broche 125 | I/O — User I/O pin |
| Broche 126 | VCCINT — 3.3 V core supply |
| Broche 127 | I/O — User I/O pin |
| Broche 128 | I/O — User I/O pin |
| Broche 129 | I/O — User I/O pin |
| Broche 130 | I/O — User I/O pin |
| Broche 131 | GND — Ground |
| Broche 132 | I/O — User I/O pin |
| Broche 133 | I/O — User I/O pin |
| Broche 134 | I/O — User I/O pin |
| Broche 135 | I/O — User I/O pin |
| Broche 136 | VCCIO — 3.3 V I/O supply |
| Broche 137 | I/O — User I/O pin |
| Broche 138 | OE2/GOE — Global Output Enable 2 |
| Broche 139 | GCLK0 — Global clock input 0 |
| Broche 140 | I/O — User I/O pin |
| Broche 141 | I/O — User I/O pin |
| Broche 142 | GND — Ground |
| Broche 143 | I/O — User I/O pin |
| Broche 144 | I/O — User I/O pin |
Applications typiques
EPM3256ATC144-10N convient pour 6 applications: Bus-Interface Bridging / Glue Logic, Microcontroller I/O Expansion, Address Decoding & Memory Mapping, State-Machine Controllers, Legacy Peripheral Replacement & Board Revisions, Telecom & Instrumentation Front-End Logic.
Bus-Interface Bridging / Glue Logic
The EPM3256ATC144-10N's 116 user I/Os and 256 macrocells make it ideal for bridging between microcontrollers and legacy peripherals running at different bus widths or voltages (with external level shifters). Its 10 ns pin-to-pin delay is fast enough to pipeline 50 MHz address/data buses without adding wait states, and the EEPROM-based instant-on configuration avoids the boot-time latency of FPGAs - critical in power-on-reset sequences. Compared to discrete 74-series logic, a single CPLD replaces dozens of gates, reducing board area and BOM cost. Quartus II design entry allows the same pinout to be reprogrammed for different peripherals, enabling one PCB to support multiple product variants via software rather than rework.
Recommandé
Microcontroller I/O Expansion
When an MCU runs out of GPIO pins, the EPM3256ATC144-10N provides 116 user I/Os that can be addressed via a simple parallel bus (address latch + data + CS + RD/WR). With a 10 ns tPD and 227.3 MHz internal counter frequency, it can debounce inputs, generate PWM outputs, and multiplex displays in real time without burdening the host CPU. The 3.3 V supply matches modern ARM Cortex-M MCUs directly, eliminating level shifters. Designers often use it to implement keypad scanners, LED matrix drivers, or rotary-encoder quadrature decoders that would otherwise consume MCU cycles. JTAG in-system programming allows firmware upgrades without removing the chip.
Recommandé
Address Decoding & Memory Mapping
The EPM3256ATC144-10N excels at address decoding in 16- and 32-bit memory systems, where it generates chip-select signals for multiple memory banks, peripherals, and dual-port RAMs. With 256 macrocells it can decode wide address ranges (e.g., 24-bit address bus into 16 chip-select outputs) with full address-bus skew compensation thanks to its 10 ns propagation delay - well within one clock cycle at 50 MHz. The non-volatile EEPROM configuration means the memory map is fixed at power-on with no FPGA boot delay, making it ideal for systems that boot from ROM/Flash at predictable timing. JTAG-driven design changes let engineers update memory maps without PCB rework.
Recommandé
State-Machine Controllers
Complex sequential control logic - such as motor-control sequencers, industrial machine safety interlocks, and instrumentation state machines - is the natural application for a 256-macrocell CPLD like the EPM3256ATC144-10N. Its deterministic 10 ns timing allows state transitions to be guaranteed within strict scheduling budgets, with no jitter from SRAM-based FPGA configuration. The 16 LABs and global Clear/Clock pins simplify multi-clock-domain designs, and the 3.3 V core matches industrial 24V->3.3V buck-converter rails. Engineers can implement Mealy/Moore state machines with dozens of states and parallel outputs without consuming any MCU cycles, freeing the host processor for higher-level tasks.
Recommandé
Legacy Peripheral Replacement & Board Revisions
The EPM3256ATC144-10N is widely used to replace obsolete or EOL 74-series TTL/CMOS glue logic, custom ASICs, and legacy PAL/GAL devices, condensing dozens of discrete parts onto a single reprogrammable chip. With 116 I/Os, it can emulate multiple standard peripherals (8255 PPI, 16450 UART glue, etc.) on a single board, and JTAG in-system programmability allows last-minute board revisions without respinning the PCB. The 144-pin TQFP package matches legacy ASIC footprints, simplifying drop-in board upgrades. Engineers can ship one hardware design and reconfigure it per customer via software, reducing inventory SKUs and time-to-market.
Recommandé
Telecom & Instrumentation Front-End Logic
Telecom line cards, test-and-measurement instruments, and data-acquisition front-ends use the EPM3256ATC144-10N for clock-distribution, framing, and protocol-interfacing glue logic. Its 227.3 MHz internal counter frequency supports high-speed serial bit-clock generation, and 116 I/Os are sufficient to bridge parallel LVDS buses to backplane connectors with custom framing logic. The deterministic, non-volatile nature of the CPLD ensures reliable power-on behaviour in unattended telecom equipment, and IEEE 1149.1 boundary-scan test (BST) simplifies board-level testing in production. Modern replacements such as MAX V EPM240 or MAX 10 are smaller but require PCB rework.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour EPM3256ATC144-10N — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | EPM3256ATC144-7N | EPM3256ATC144-10 | EPM3256ATC144-10AA | EPM7256AETC144-10N | EPM3128ATC144-10N |
|---|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera | Altera |
| Package | 144-LQFP (TQFP) | 144-LQFP (TQFP) - same | 144-LQFP (TQFP) - same | 144-LQFP (TQFP) - same | 144-LQFP (TQFP) - same | 144-LQFP (TQFP) - same |
| Series / Family | MAX 3000A | MAX 3000A | MAX 3000A | MAX 3000A | MAX 7000AE | MAX 3000A |
| Macro Cells | 256 | 256 | 256 | 256 | 256 | 128 |
| Propagation Delay (tPD) | 10 ns | 7.5 ns | 10 ns | 10 ns | 10 ns | 10 ns |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Configuration Memory | EEPROM (non-volatile) | EEPROM | EEPROM | EEPROM | EEPROM | EEPROM |
| Lifecycle Status | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Obsolete | Last Time Buy |
Principaux différenciateurs
- Pin-compatible same-footprint drop-in across speed and temperature grades (vs EPM3256ATC144-7N)
- Same TQFP-144 package but 50% more macrocells than the smaller sibling (vs EPM3128ATC144-10N)
- Non-volatile EEPROM configuration with no boot latency (vs SRAM-based FPGAs (e.g., Cyclone series))
Notes de conception
Decoupling is critical for the EPM3256ATC144-10N: place one 0.1 µF X7R ceramic capacitor within 5 mm of every VCCINT pin and one 10 µF tantalum or polymer bulk capacitor near the package. With 116 I/Os switching simultaneously at 50 MHz, the inrush current can spike to 200 mA; insufficient decoupling will cause VCC droop and trigger false JTAG errors during ISP. Each VCCIO bank must also have its own 0.1 µF capacitor if the I/Os are driving diverse loads. Estimated: assuming 16 simultaneous switching outputs at 50 pF each into 50 MHz, the dynamic supply current is approximately 200 mA per VCCINT pin cluster.
The 144-pin TQFP has a 0.5 mm pitch; use a 4-layer PCB with a dedicated ground plane under the CPLD to provide a low-impedance return path for switching outputs. Place the JTAG connector (TMS/TCK/TDO/TDI plus GND) within 50 mm of the device and add 10 kΩ pull-ups on TMS and TDI per IEEE 1149.1. Glob-top or under-fill is recommended for industrial environments, since the exposed lead tips of the TQFP are vulnerable to vibration and humidity-induced dendritic growth.
Three common pitfalls when using the EPM3256ATC144-10N: (1) Mixing 3.3 V and 5 V signals - the I/Os are NOT 5 V-tolerant and a 5 V input will damage the silicon; use external level-shifters. (2) Using modern Quartus Prime - MAX 3000A support was dropped after Quartus II 13.0; you must install legacy Quartus II or use a ByteBlasterMV-compatible programmer. (3) Forgetting the global clear pin - GCLRn defaults to an input on power-up; if left floating, the device may power up in an undefined state. Tie GCLRn high via a 10 kΩ pull-up to VCCIO if you do not need asynchronous clear.
Long TQFP leads (~1.5 mm) introduce noticeable inductance (~1 nH each) - keep traces from the EPM3256ATC144-10N short (<25 mm) for signals above 50 MHz. Series-terminate clock and high-speed outputs with 33 Ω resistors at the driver end to dampen ringing. For bus interfaces >50 MHz, use controlled-impedance (50 Ω single-ended) traces and avoid stubs. The 10 ns tPD assumes an output load of 35 pF; exceeding this load will degrade timing margins significantly.
Informations de conformité
RoHS / REACH / lead-free / halogen-free status for the EPM3256ATC144-10N could not be confirmed from the verified web snippets and is marked [DATA_NEEDED]. The part is not AEC-Q100 qualified (commercial temp only per the -N suffix). Engineers concerned with EU regulatory compliance should request a compliance certificate directly from Intel/legacy Altera support.
