Altera

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

부품 번호: EPM3256ATI144-7N ✗ 단종

재고 있음 영업일 기준 1~3일 내 발송

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

시작가 $10.95 USD / 개

MOQ: 1 |

가격 업데이트: 2026-09-12

볼륨 가격

수량	단가	합계
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 모든 가격은 USD 기준입니다

데이터시트 보기 (PDF) 대체품 보기

수량

EPM3256ATI144-7N 개요

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.

드롭인 대체품: EPM3256ATI144-7N — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.

이 시리즈의 변형

다음과 드롭인 호환되는 동일 시리즈 모델: EPM3256ATI144-7N (동일 폼 팩터 및 풋프린트) — 차이점: 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

비교 대상: 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

비교 대상: EPM3256ATI144-7N →

EPM3256ATC144-7

Altera

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

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

Propagation Delay (tPD): 7.5 ns

비교 대상: EPM3256ATI144-7N →

EPM3256ATC144-7N

Altera

Package: 144-pin TQFP

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

Propagation Delay (tPD): 7.5 ns

비교 대상: EPM3256ATI144-7N →

EPM3256ATI144-10

Intel

Package: 144-pin TQFP (20x20 mm)

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

비교 대상: EPM3256ATI144-7N →

✅ 드롭인 ⚠️ 사양 미검증

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

✓ 재고 있음

가격 문의

데이터시트 보기 →

EPM3256ATI144-7N 최대 정격 & 전기적 특성

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
패키지	TQFP-144 (20 x 20 mm, 0.5 mm pitch)
동작 온도	-40C to +85C (industrial)
RoHS 상태	Compliant (lead-free)

EPM3256ATI144-7N 핀 구성

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

일반적인 애플리케이션

EPM3256ATI144-7N 적합 용도: 6 애플리케이션s: 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.

추천

🔧

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.

추천

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.

추천

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.

추천

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.

추천

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.

추천

EPM3256ATC144-7N · Altera

추천 제품 요약

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

엔지니어링 참조 데이터: EPM3256ATI144-7N — 비교, 설계 지침 및 규정 준수 정보.

선택 가이드

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.

대체품과의 비교

파라미터	이 제품	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

주요 차별점

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

설계 노트

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.

규정 준수 정보

RoHS

Compliant

REACH

Compliant

AEC-Q100

Not Applicable

무연

Yes

무할로겐

Unknown

분쟁 광물

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.

데이터 검증일: 2026-09-12 — XAIPART 부품 엔지니어링 팀이 검증하고 관리한 데이터

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