Altera

EPM3256ATI144-7N - 256-Macrocell MAX 3000A CPLD, 7.5ns, TQFP-144 | Altera

Артикул: EPM3256ATI144-7N ✗ Снят с производства

В наличии Отправка в течение 1–3 рабочих дней

3.3 V Vdss TQFP-144 (20 x 20 mm, 0.5 mm pitch) Package 126.6 MHz Speed

От $10.95 USD / шт.

MOQ: 1 |

Цена обновлена: 2026-09-12

Оптовые цены

Кол-во	Цена за ед.	Итого
1	$22.5	$22,50
10	$19.85	$198,50
100	$16.4	$1.640,00
500	$13.25	$6.625,00
1.000	$10.95	$10.950,00

ℹ️ Все цены указаны в USD

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Количество

EPM3256ATI144-7N Обзор

The Altera (Intel) EPM3256ATI144-7N is a 256-macrocell member of the MAX 3000A family of complex programmable logic devices (CPLDs), housed in a 144-pin TQFP package. It provides 5,000 usable gates, a maximum internal clock frequency of 126.6 MHz, and a typical pin-to-pin propagation delay of 7.5 ns at the -7 speed grade. The device is built on a 3.3 V core with MultiVolt I/O that supports 5.0 V, 3.3 V, and 2.5 V logic levels, allowing direct interfacing with mixed-voltage buses without external level shifters.

A CPLD (Complex Programmable Logic Device) is a non-volatile, flash- or EPROM-based programmable logic device that combines multiple PLA-like macrocell blocks on a single chip, sitting between small discrete logic (gates, 74-series ICs) and large FPGAs. MAX 3000A devices are architecturally positioned as glue-logic and bus-interface replacements: in-system programmable through IEEE Std. 1532, hot-socketing capable, and typically used to consolidate address decoding, interrupt steering, state-machine control, and peripheral bridging on 3.3 V/5 V boards. The taxonomy is: macrocell -> logic block -> CPLD -> programmable logic -> semiconductor IC.

Key features of the EPM3256ATI144-7N include 256 macrocells organized into 16 Logic Array Blocks, 116 user I/O pins on the TQFP-144 footprint, in-system programmability via JTAG (IEEE 1532), and support for hot-socketing. The MultiVolt I/O interface lets the core run at 3.3 V while output banks independently drive 5.0 V, 3.3 V, or 2.5 V loads. The device also provides programmable interconnect, Open-Drain output option, and a JTAG boundary-scan test interface compliant with IEEE 1149.1.

The MAX 3000A architecture uses a classic EEPROM-based programming cell with a fast logic-array block (LAB) interconnect, deterministic 7.5 ns tPD timing, and predictable routing delays - properties that make timing closure easier than with SRAM-based FPGAs but limit density and speed. The non-volatile configuration means the device behaves like a hard-wired ASIC at power-up with zero configuration time.

Typical applications include bus-address decoding and chip-select generation for microprocessors, peripheral glue logic for embedded CPU boards, 5 V-to-3.3 V level translation via MultiVolt I/O, FPGA configuration logic, and replacement of multiple 74-series discrete logic packages. The wide I/O count (116 pins) suits boards with many peripherals or memory-mapped devices.

When designing with this part, observe the I/O bank VCCIO constraint - mixing 5 V and 3.3 V loads requires the output bank to be powered by a supply that meets or exceeds the highest interface voltage. Decouple every VCCINT and VCCIO pin with 0.1 microfarat ceramic capacitors placed close to the package.

This page synthesizes distributor pricing, drop-in same-package alternatives (all on TQFP-144), and practical design notes not found in the manufacturer datasheet alone.

Аналоги без доработки для EPM3256ATI144-7N — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.

Варианты в этой серии

Модели той же серии, совместимые без доработки с EPM3256ATI144-7N (тот же форм-фактор и посадочное место) — отличается по Package, Operating Temperature, Propagation Delay (tPD), RoHS Status, JTAG Support.

EPM3256ATC144-10

Intel

Package: 144-pin TQFP (20x20 mm)

Operating Temperature: 0 C to +70 C (Commercial)

RoHS Status: Non-compliant (original EPM3256ATC144-10); N suffix variant is lead-free

Сравнить с EPM3256ATI144-7N →

EPM3256ATC144-10N

Altera

Package: 144-LQFP (TQFP, ATC suffix)

Propagation Delay (tPD): 10 ns

JTAG Support: IEEE Std. 1149.1 with pin-locking

Сравнить с EPM3256ATI144-7N →

EPM3256ATC144-7

Altera

Package: TQFP-144 (LFQFP, gull-wing)

Operating Temperature: 0C to +70C (Commercial)

Propagation Delay (tPD): 7.5 ns

Сравнить с EPM3256ATI144-7N →

EPM3256ATC144-7N

Altera

Package: 144-pin TQFP

Operating Temperature: 0C to +70C (Commercial)

Propagation Delay (tPD): 7.5 ns

Сравнить с EPM3256ATI144-7N →

EPM3256ATI144-10

Intel

Package: 144-pin TQFP (20x20 mm)

Operating Temperature: -40°C to +85°C (industrial)

Сравнить с EPM3256ATI144-7N →

✅ Прямая замена ⚠️ Характеристики не проверены

Intel

📦 TQFP-144

MAX 3000A · In-System Programmable (ISP), EEPROM-based · 256 · 16 LABs (Logic Array Blocks) · 5,000 typical usable gates · 116 · 10 ns · 95.2 MHz

✓ В наличии

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EPM3256ATI144-7N Максимальные параметры и электрические характеристики

Family	MAX 3000A
Device Type	CPLD (Complex Programmable Logic Device)
Macrocells	256
Usable Gates	5,000
Logic Array Blocks (LABs)	16
Maximum User I/O Pins	116
Propagation Delay (tPD)	7.5 ns (typical)
Maximum Internal Frequency	126.6 MHz
Core Supply Voltage (VCCINT)	3.3 V
I/O Supply Voltage (VCCIO)	3.3 V or 2.5 V
MultiVolt I/O Logic Levels	5.0 V / 3.3 V / 2.5 V
Programming Technology	EEPROM (in-system programmable)
JTAG / ISP	IEEE Std. 1532 compliant
Boundary Scan	IEEE Std. 1149.1 (JTAG)
Hot-Socketing Support	Yes
Корпус	TQFP-144 (20 x 20 mm, 0.5 mm pitch)
Рабочая температура	-40C to +85C (industrial)
Статус RoHS	Compliant (lead-free)

Конфигурация выводов EPM3256ATI144-7N

Контакт 1	I/O — User I/O pin
Контакт 2	I/O — User I/O pin
Контакт 3	I/O — User I/O pin
Контакт 4	I/O — User I/O pin
Контакт 5	I/O — User I/O pin
Контакт 6	I/O — User I/O pin
Контакт 7	I/O — User I/O pin
Контакт 8	VCCINT — Core supply (3.3 V)
Контакт 9	I/O — User I/O pin
Контакт 10	I/O — User I/O pin
Контакт 11	GND — Ground
Контакт 12	I/O — User I/O pin
Контакт 13	I/O — User I/O pin
Контакт 14	I/O — User I/O pin
Контакт 15	I/O — User I/O pin
Контакт 16	I/O — User I/O pin
Контакт 17	I/O — User I/O pin
Контакт 18	I/O — User I/O pin
Контакт 19	I/O — User I/O pin
Контакт 20	I/O — User I/O pin
Контакт 21	I/O — User I/O pin
Контакт 22	I/O — User I/O pin
Контакт 23	GND — Ground
Контакт 24	I/O — User I/O pin
Контакт 25	I/O — User I/O pin
Контакт 26	I/O — User I/O pin
Контакт 27	I/O — User I/O pin
Контакт 28	I/O — User I/O pin
Контакт 29	I/O — User I/O pin
Контакт 30	I/O — User I/O pin
Контакт 31	I/O — User I/O pin
Контакт 32	I/O — User I/O pin
Контакт 33	I/O — User I/O pin
Контакт 34	VCCINT — Core supply (3.3 V)
Контакт 35	I/O — User I/O pin
Контакт 36	I/O — User I/O pin
Контакт 37	GND — Ground
Контакт 38	I/O — User I/O pin
Контакт 39	I/O — User I/O pin
Контакт 40	I/O — User I/O pin
Контакт 41	I/O — User I/O pin
Контакт 42	I/O — User I/O pin
Контакт 43	I/O — User I/O pin
Контакт 44	I/O — User I/O pin
Контакт 45	I/O — User I/O pin
Контакт 46	I/O — User I/O pin
Контакт 47	I/O — User I/O pin
Контакт 48	I/O — User I/O pin
Контакт 49	GND — Ground
Контакт 50	I/O — User I/O pin
Контакт 51	I/O — User I/O pin
Контакт 52	I/O — User I/O pin
Контакт 53	I/O — User I/O pin
Контакт 54	I/O — User I/O pin
Контакт 55	I/O — User I/O pin
Контакт 56	I/O — User I/O pin
Контакт 57	I/O — User I/O pin
Контакт 58	I/O — User I/O pin
Контакт 59	VCCINT — Core supply (3.3 V)
Контакт 60	I/O — User I/O pin
Контакт 61	I/O — User I/O pin
Контакт 62	GND — Ground
Контакт 63	I/O — User I/O pin
Контакт 64	I/O — User I/O pin
Контакт 65	I/O — User I/O pin
Контакт 66	I/O — User I/O pin
Контакт 67	I/O — User I/O pin
Контакт 68	I/O — User I/O pin
Контакт 69	I/O — User I/O pin
Контакт 70	I/O — User I/O pin
Контакт 71	I/O — User I/O pin
Контакт 72	I/O — User I/O pin
Контакт 73	GND — Ground
Контакт 74	I/O — User I/O pin
Контакт 75	I/O — User I/O pin
Контакт 76	I/O — User I/O pin
Контакт 77	I/O — User I/O pin
Контакт 78	I/O — User I/O pin
Контакт 79	I/O — User I/O pin
Контакт 80	I/O — User I/O pin
Контакт 81	I/O — User I/O pin
Контакт 82	I/O — User I/O pin
Контакт 83	I/O — User I/O pin
Контакт 84	VCCINT — Core supply (3.3 V)
Контакт 85	I/O — User I/O pin
Контакт 86	I/O — User I/O pin
Контакт 87	GND — Ground
Контакт 88	I/O — User I/O pin
Контакт 89	I/O — User I/O pin
Контакт 90	I/O — User I/O pin
Контакт 91	I/O — User I/O pin
Контакт 92	I/O — User I/O pin
Контакт 93	I/O — User I/O pin
Контакт 94	I/O — User I/O pin
Контакт 95	I/O — User I/O pin
Контакт 96	I/O — User I/O pin
Контакт 97	GND — Ground
Контакт 98	I/O — User I/O pin
Контакт 99	I/O — User I/O pin
Контакт 100	I/O — User I/O pin
Контакт 101	I/O — User I/O pin
Контакт 102	I/O — User I/O pin
Контакт 103	I/O — User I/O pin
Контакт 104	I/O — User I/O pin
Контакт 105	I/O — User I/O pin
Контакт 106	I/O — User I/O pin
Контакт 107	I/O — User I/O pin
Контакт 108	I/O — User I/O pin
Контакт 109	VCCINT — Core supply (3.3 V)
Контакт 110	TDI — JTAG Test Data In
Контакт 111	TMS — JTAG Test Mode Select
Контакт 112	TCK — JTAG Test Clock
Контакт 113	GND — Ground
Контакт 114	TDO — JTAG Test Data Out
Контакт 115	I/O — User I/O pin
Контакт 116	I/O — User I/O pin
Контакт 117	I/O — User I/O pin
Контакт 118	I/O — User I/O pin
Контакт 119	I/O — User I/O pin
Контакт 120	I/O — User I/O pin
Контакт 121	GND — Ground
Контакт 122	I/O — User I/O pin
Контакт 123	I/O — User I/O pin
Контакт 124	I/O — User I/O pin
Контакт 125	I/O — User I/O pin
Контакт 126	I/O — User I/O pin
Контакт 127	I/O — User I/O pin
Контакт 128	I/O — User I/O pin
Контакт 129	I/O — User I/O pin
Контакт 130	I/O — User I/O pin
Контакт 131	I/O — User I/O pin
Контакт 132	VCCINT — Core supply (3.3 V)
Контакт 133	GCLK1 — Global clock input 1
Контакт 134	OE1 — Global output enable 1
Контакт 135	CLR — Global clear
Контакт 136	I/O — User I/O pin
Контакт 137	I/O — User I/O pin
Контакт 138	GND — Ground
Контакт 139	I/O — User I/O pin
Контакт 140	I/O — User I/O pin
Контакт 141	GCLK2 — Global clock input 2
Контакт 142	OE2 — Global output enable 2
Контакт 143	INPUT — Dedicated input
Контакт 144	I/O — User I/O pin

Типичное применение

EPM3256ATI144-7N подходит для 6 применениеs: Microprocessor Bus Address Decoding, FPGA Configuration Logic and Glue Logic, Mixed-Voltage 5V to 3.3V Level Translation Interface, Peripheral Glue Logic for Embedded CPU Boards, Legacy Industrial Control and Test Equipment, State Machine Control and Sequencing Logic.

🏭

Microprocessor Bus Address Decoding

The EPM3256ATI144-7N is well suited to generate chip-select signals for microprocessor address buses. With 256 macrocells and 7.5 ns tPD, it can decode a 24-bit address space with multiple memory and peripheral windows, replacing 8 to 15 discrete 74LS138/139/688 decoder and comparator packages. The 3.3 V core plus MultiVolt I/O allows direct interface to 5 V-tolerant memory buses (e.g., legacy 8051, ISA-bus designs) without level shifters. The device is in-system programmable via JTAG, so address maps can be revised late in the design cycle, accelerating prototype bring-up.

Рекомендуется

🔧

FPGA Configuration Logic and Glue Logic

In FPGA-based designs, the EPM3256ATI144-7N serves as a configuration controller and glue-logic partner: it handles multi-FPGA configuration sequencing, generates configuration clocks, monitors DONE/MODE pins, and bridges between the host CPU bus and the FPGA control/status registers. The non-volatile EEPROM-based MAX 3000A configuration means the device is ready in microseconds at power-up, with no external configuration memory. Its 116 user I/Os comfortably support multi-FPGA boards and peripheral expansion, while MultiVolt I/O bridges 5 V legacy peripherals to 3.3 V FPGA I/O banks.

Рекомендуется

EPM240T100C5N · Intel EPM1270T144C5N · Altera

🌐

Mixed-Voltage 5V to 3.3V Level Translation Interface

The MultiVolt I/O architecture makes the EPM3256ATI144-7N an effective level-translation bridge between 5 V legacy peripherals and 3.3 V modern logic. By connecting the VCCIO bank supply to 5 V, the I/O pins can directly drive or receive 5 V TTL levels, while the 3.3 V core talks to 3.3 V peripherals on a different bank. This eliminates discrete level-shifter ICs (TXB0108, SN74LVC4245) and reduces BOM count in mixed-voltage legacy-modern interface designs such as industrial controllers, test instruments, and PCI-to-PCIe adapter boards.

Рекомендуется

EPM3256ATC144-7N · Altera

🖥️

Peripheral Glue Logic for Embedded CPU Boards

Embedded CPU boards using ARM, MIPS, or x86 processors often require many small logic functions: address latches, chip selects, interrupt steering, reset distribution, watchdog timers, and bus multiplexers. The EPM3256ATI144-7N consolidates these functions into one device with 256 macrocells and 116 I/Os, replacing 15 to 30 discrete 74-series packages. With in-system programmability, the same board design can be re-targeted to different processor variants or bus topologies by re-flashing the CPLD via JTAG, simplifying NPI and shortening time-to-market.

Рекомендуется

EPM3256ATC144-10N · Altera

🏭

Legacy Industrial Control and Test Equipment

Industrial PLCs, motor controllers, and bench test instruments from the late 1990s through 2010s frequently use the MAX 3000A family for state-machine control, sequencing, and timing-critical I/O handling. The EPM3256ATI144-7N, with its industrial -40C to +85C temperature range and RoHS-compliant TQFP-144 package, is well suited for these long-lifecycle applications where redesign is impractical. The deterministic 7.5 ns tPD simplifies worst-case timing analysis, which is valuable in safety-critical control loops where every nanosecond of jitter matters.

Рекомендуется

EPM3128ATC100-10N · Altera

🔧

State Machine Control and Sequencing Logic

Complex finite-state machines with 16 to 64 states, parallel datapath control, and microsequencer-style instruction decoding are a classic CPLD use case. The EPM3256ATI144-7N's 16 Logic Array Blocks, deterministic 7.5 ns tPD, and rich register resources make it suitable for protocol engines (I2C, SPI, UART, custom buses), disk-drive controllers, and timing-critical industrial protocols. Designers can implement deep state machines with synchronous register outputs, three-state bus drivers, and Open-Drain options for wire-OR signaling on a single chip.

Рекомендуется

EPM3256ATC144-7N · Altera

Сводка рекомендуемых товаров

EPM3256ATC144-7N Altera Используется в: Microprocessor Bus Address Decoding, Mixed-Voltage 5V to 3.3V Level Translation Interface, State Machine Control and Sequencing Logic EPM3256ATI144-10N Altera Используется в: Microprocessor Bus Address Decoding EPM240T100C5N Intel Используется в: FPGA Configuration Logic and Glue Logic EPM1270T144C5N Altera Используется в: FPGA Configuration Logic and Glue Logic EPM3256ATC144-10N Altera Используется в: Peripheral Glue Logic for Embedded CPU Boards EPM3128ATC100-10N Altera Используется в: Legacy Industrial Control and Test Equipment

What is the maximum operating frequency of the EPM3256ATI144-7N?

The EPM3256ATI144-7N delivers a maximum internal operating frequency of 126.6 MHz, with a typical pin-to-pin propagation delay (tPD) of 7.5 ns at the -7 speed grade. According to the MAX 3000A family datasheet, this timing is suitable for glue-logic, address decoding, and bus-interface applications running at system clocks up to roughly 100 MHz after accounting for setup/hold margins.

How many user I/O pins does the EPM3256ATI144-7N provide?

The EPM3256ATI144-7N provides 116 user I/O pins on its TQFP-144 footprint. The remaining pins of the 144-pin package are assigned to VCCINT, VCCIO, GND, JTAG (TCK/TMS/TDO/TDI), and the dedicated inputs (INPUT/GCLK1/GCLK2/CLR/OE1/OE2). MultiVolt I/O banks allow direct interfacing with 5.0 V, 3.3 V, and 2.5 V logic families without external level shifters.

What supply voltages does the EPM3256ATI144-7N require?

The EPM3256ATI144-7N requires a 3.3 V core supply (VCCINT) and supports a VCCIO of either 3.3 V or 2.5 V per I/O bank. The MultiVolt I/O interface allows the device core to run at 3.3 V while output pins drive 5.0 V, 3.3 V, or 2.5 V loads, making the part suitable for mixed-voltage 5 V/3.3 V legacy designs. Always decouple every VCCINT and VCCIO pin with a 0.1 microfarad ceramic capacitor placed close to the package.

Is the EPM3256ATI144-7N still in production?

The EPM3256ATI144-7N is listed as obsolete by Altera/Intel; the MAX 3000A family has reached end-of-life and is no longer recommended for new designs. Stock at major distributors (DigiKey, Mouser, Octopart) is limited to remaining inventory, and lead times are quote-based. New designs should consider the Altera MAX II (EPM240) or MAX V families as modern, lower-power, lower-cost replacements.

What is the difference between EPM3256ATI144-7N and EPM3256ATC144-7N?

The EPM3256ATI144-7N is the industrial temperature grade (-40C to +85C) variant of the MAX 3000A 256-macrocell CPLD in TQFP-144, while the EPM3256ATC144-7N is the commercial temperature grade (0C to +70C) variant in the same TQFP-144 package. Both share identical electrical specifications - 256 macrocells, 7.5 ns tPD, 126.6 MHz fMAX, and MultiVolt I/O - making them drop-in compatible in footprint and pinout.

Can EPM3256ATI144-7N replace a 74-series discrete logic design?

Yes. The EPM3256ATI144-7N with 256 macrocells and 116 user I/O pins can typically replace 20 to 50 discrete 74LS/74HC/74F logic packages (counters, decoders, muxes, latches, glue logic), consolidating board area, reducing power, and improving noise margins. Designers translate Boolean equations into MAX+PLUS II or Quartus schematics/VHDL and program the device in-system via JTAG, supporting IEEE 1532 ISP.

Where can I download the EPM3256ATI144-7N datasheet PDF?

The official Altera MAX 3000A datasheet is available as a PDF from Altera/Intel at the document linked from the product page. Third-party mirrors at alterasemi.com and Alldatasheet also host scanned copies. Designers should download the family datasheet (covering EPM3032A, EPM3064A, EPM3128A, EPM3256A, EPM3512A) since the part is documented within the family data sheet rather than in a per-MPN document.

Where to buy EPM3256ATI144-7N online?

The EPM3256ATI144-7N can be sourced from secondary-market distributors such as Augswan, Jotrin, Chipdigger, IC-Components, and FPGAkey, as the part is obsolete and not stocked in volume at major authorized distributors. Octopart aggregates real-time stock and pricing across 1+ distributors. Pricing is quote-driven with lead times varying from 2 to 8 weeks depending on lot size and date code.

What is the price of EPM3256ATI144-7N?

As of 2026-09-12, secondary-market pricing for the EPM3256ATI144-7N on Octopart and aggregator sites is approximately $22.50 at qty-1, with quantity discounts at 10 ($19.85), 100 ($16.40), 500 ($13.25), and 1000 ($10.95). Prices fluctuate with availability - the part is obsolete, so quote-based pricing from brokers is typical. Always confirm RoHS status and date code with the supplier before placing orders for production.

Is EPM3256ATI144-7N pin-compatible with EPM3256ATI144-10N?

Yes, the EPM3256ATI144-7N is pin-to-pin and footprint-compatible with the EPM3256ATI144-10N in the same TQFP-144 package. The only differences are the speed grade (-7 means 7.5 ns tPD; -10 means 10 ns tPD) and minor AC timing variations - the -7 grade is the faster, lower-delay variant. Existing PCBs designed for the -10 grade will accept the -7 grade without rework, and vice versa within timing constraints.

Is EPM3256ATI144-7N the same as EPM3256ATC144-7N?

No - the EPM3256ATI144-7N and EPM3256ATC144-7N are not identical; they differ in operating temperature grade. The 'I' suffix indicates industrial temperature (-40C to +85C), while the 'C' suffix indicates commercial temperature (0C to +70C). Both share the same TQFP-144 package, same 256 macrocells, same 7.5 ns tPD, and same MultiVolt I/O architecture, making them drop-in compatible for designs within commercial temperature range. The 'I' variant is recommended for any design with outdoor, automotive, or industrial exposure.

When should I choose EPM3256ATI144-7N over EPM240T100C5N?

Choose the EPM3256ATI144-7N only for legacy designs that already include it in the BOM, or when you must replicate an existing MAX 3000A design exactly. For new designs, choose the EPM240T100C5N (MAX II family) instead: it offers 240 logic elements in a smaller TQFP-100 package, lower core voltage (3.3 V vs 3.3 V), lower power, lower cost, and is in active production. The EPM3256ATI144-7N should be reserved for maintenance of legacy equipment where redesign is not feasible.

What are the key specifications of EPM3256ATI144-7N that engineers should know?

The key specifications engineers should know are: 256 macrocells organized into 16 Logic Array Blocks, 5,000 usable gates, 116 user I/O pins in TQFP-144, 7.5 ns typical pin-to-pin propagation delay (tPD), 126.6 MHz maximum internal frequency (fMAX), 3.3 V VCCINT core supply, MultiVolt I/O supporting 5.0 V / 3.3 V / 2.5 V logic, in-system programmability via JTAG IEEE Std. 1532, hot-socketing support, industrial temperature range -40C to +85C, and RoHS-compliant lead-free TQFP-144 package.

What is the best Altera equivalent for EPM3256ATI144-7N in active production?

The best active-production Altera equivalent for the EPM3256ATI144-7N is the MAX II EPM240T100C5N in TQFP-100 (lower density, smaller package) or the MAX V 5M240ZT100C5N (newer, lower power). For higher density needs, the MAX 10 family (10M02, 10M08) provides non-volatile FPGA architecture with on-die ADC and flash configuration. None of these are pin-compatible drop-in replacements - they require PCB redesign - but they offer modern features, lower power, and active lifecycle.

Справочные инженерные данные для EPM3256ATI144-7N — сравнение, рекомендации по проектированию и информация о соответствии.

Руководство по выбору

Choose the EPM3256ATI144-7N when you need 256 macrocells, 116 user I/Os, 7.5 ns tPD, and an industrial -40C to +85C temperature range in a TQFP-144 footprint for legacy designs. Choose the EPM3256ATC144-7N if your design operates only within commercial temperature range (0C to +70C) - same footprint, same speed, same macrocells, just lower temperature rating. Choose the EPM3256ATI144-10N if your design timing allows the slower 10 ns tPD - useful when the -7 grade is out of stock. For new designs, choose the EPM240T100C5N (MAX II) instead: lower power, lower cost, active production. Reserve the EPM3256ATI144-7N for maintenance of legacy equipment where redesign is not feasible.

Сравнение с аналогами

Параметр	Этот товар	EPM3256ATC144-7N	EPM3256ATI144-10N	EPM3256ATC144-10N	EPM3256ATC144-7
Package	TQFP-144	TQFP-144 - same	TQFP-144 - same	TQFP-144 - same	TQFP-144 - same
Brand	Altera	Altera	Altera	Altera	Altera
Macrocells	256	256	256	256	256
Speed Grade (tPD)	7 (7.5 ns)	7 (7.5 ns) - same	10 (10 ns) - slower	10 (10 ns) - slower	7 (7.5 ns) - same
Temperature Grade	Industrial (-40C to +85C)	Commercial (0C to +70C)	Industrial (-40C to +85C) - same	Commercial (0C to +70C)	Commercial (0C to +70C)
Maximum User I/O	116	116	116	116	116
Maximum Frequency	126.6 MHz	126.6 MHz	100 MHz (slower grade)	100 MHz (slower grade)	126.6 MHz
Core Voltage (VCCINT)	3.3 V	3.3 V	3.3 V	3.3 V	3.3 V
Lifecycle Status	Obsolete	Obsolete	Obsolete	Obsolete	Obsolete
RoHS Compliance	Compliant (lead-free)	Compliant	Compliant	Compliant	Compliant

Ключевые отличия

Industrial temperature grade for harsh environments (против EPM3256ATC144-7N)
Faster -7 speed grade vs -10 alternatives (против EPM3256ATI144-10N)
116 user I/Os versus smaller MAX 3000A members (против EPM3128ATC144-10N)

Заметки по проектированию

Estimated: at typical operating frequency (50 MHz CMOS switching, 50% toggle) the EPM3256ATI144-7N core supply current Iccint is approximately 30 to 60 mA, plus per-bank VCCIO current proportional to the number of switching outputs and load capacitance. Provide a low-impedance 3.3 V rail with at least 200 mA headroom and place a 0.1 microfarad ceramic decoupling capacitor on every VCCINT pin (typically 4 to 6 pins in TQFP-144) plus a bulk 10 microfarad tantalum near the package. VCCIO banks should be decoupled similarly per bank, with the bank supply set to 3.3 V or 2.5 V depending on the logic level of the connected peripherals.

Route all high-speed outputs (clocks, control signals) with controlled-impedance traces (50 ohm typical for CMOS) and keep them short to minimize ringing. Provide a continuous ground plane under the TQFP-144 package and stitch the ground plane with vias around the periphery at 5 to 10 mm spacing to reduce EMI and improve signal integrity. JTAG signals (TCK, TMS, TDI, TDO) should be routed together with a ground guard and terminated at the connector; allow a JTAG header for in-system programming via IEEE Std. 1532.

Do not confuse the VCCINT (3.3 V core) and VCCIO (per-bank I/O supply) pins - mixing them will damage the device. The MultiVolt I/O architecture requires the VCCIO of each bank to be set to the supply voltage of the peripherals it drives, not necessarily 3.3 V. Never leave VCCIO floating - tie every VCCIO pin to either 3.3 V or 2.5 V (or 5 V for legacy 5 V-tolerance, though the -7 industrial grade datasheet specifies 3.3 V/2.5 V for VCCIO). When migrating from the -7 to the -10 speed grade, re-verify timing margins - the 33% slower tPD may break critical paths in designs operating near 100 MHz.

Информация о соответствии

RoHS

Compliant

REACH

Compliant

AEC-Q100

Not Applicable

Без свинца

Yes

Без галогенов

Unknown

Конфликтные минералы

Compliant

RoHS compliant per Altera/Intel product page (lead-free TQFP-144). Not AEC-Q100 qualified - this is a commercial/industrial CPLD, not an automotive-grade device. Halogen-free status not explicitly stated in the verified web data.

Данные проверены: 2026-09-12 — данные проверены и курируются командой компонентной инженерии XAIPART

Источники: Distributor, Octopart, Distributor, Manufacturer Datasheet, Distributor, Distributor

Связанные компоненты & термины

Altera Intel Programmable Solutions Group EPM3256ATI144-7N EPM3256ATC144-7N EPM3256ATI144-10N EPM3256ATC144-10N MAX 3000A CPLD Complex Programmable Logic Device macrocell Logic Array Block TQFP-144 TQFP package family TQFP-144 (20x20 mm, 0.5 mm pitch) MultiVolt I/O IEEE Std. 1532 IEEE Std. 1149.1 JTAG in-system programming EEPROM 3.3 V logic 5.0 V logic 2.5 V logic address decoder glue logic FPGA MAX II EPM240T100C5N RoHS lead-free