EPM7256AETI144-7N - MAX 7000A CPLD 256 Macro 3.3V TQFP-144
MPN: EPM7256AETI144-7N ✗ پایان تولیدEPM7256AETI144-7N نمای کلی
A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic IC that provides instant-on behavior, deterministic timing, and flexible glue-logic integration. CPLDs sit hierarchically below FPGAs and above discrete 74-series logic: they offer more density than discrete logic but lower latency and simpler tool flow than FPGAs, making them ideal for bus decoding, address mapping, state-machine control, and I/O expansion in cost-sensitive, low-power systems.
Key features of the EPM7256AETI144-7N include 256 macrocells, 36 user I/Os (industrial-grade), pin-to-pin logic delays of 7.5 ns, a maximum internal counter frequency of 126.6 MHz, and JTAG-based in-system programmability via the IEEE 1149.1 boundary-scan interface. The MAX 7000A architecture combines a programmable AND/OR array with macrocell flip-flops and per-pin programmable output slew-rate control.
This part is built on a 0.3 µm EEPROM process node with 5V-tolerant I/O, allowing direct interface to legacy 5V peripherals without level shifters. The 144-pin TQFP offers 36 dedicated user I/Os, four dedicated inputs, and global control signals for clock, clear, and output enable. MultiVolt I/O supports mixed-voltage rails in designs bridging 5.0V and 3.3V domains.
Typical applications include peripheral-interface bridging (PCI, ISA, VME bus decoding), state-machine-based motor and servo control, glue-logic replacement of multiple discrete 74-series devices, address decoding for memory-mapped microcontrollers, and industrial-control systems requiring instant-on non-volatile configuration. The industrial temperature grade (-40 °C to +85 °C) supports harsh-environment deployment.
When designing with this part, ensure that the Quartus II / MAX+PLUS II toolchain is used for synthesis and fitting. Reserve at least one JTAG pin (TCK, TMS, TDI, TDO) group in the pinout to support in-system programming, and decouple every VCCINT and VCCIO pin with a 0.1 µF ceramic capacitor placed within 5 mm of the package.
This page synthesizes distributor pricing, verified parametric data, drop-in alternatives from the MAX 7000A family and competitor equivalents, and practical design notes not consolidated on any single manufacturer or distributor page.
جایگزین‌های drop-in برای EPM7256AETI144-7N — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای EPM7256AETI144-7N (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Programming Interface, Configuration Memory, Operating Temperature, Supply Voltage (VCCINT).
EPM7256AETI144-7
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←EPM7256AETI144-10N
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
EPM7256AEFC256-5N
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←LC4256V-75T144E
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
EPM7256AETC144-10N
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←EPM7256AETC144-7N
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←EPM7256AETI144-7N حداکثر مقادیر مجاز و مشخصات الکتریکی
| Family | MAX 7000A |
| Device Type | CPLD (Complex Programmable Logic Device) |
| Usable Gates | 5000 |
| Macrocells | 256 |
| User I/Os | 36 (industrial variant) |
| Logic Elements | 256 |
| Supply Voltage (VCCINT) | 3.0 V to 3.6 V (3.3 V nominal) |
| I/O Voltage (VCCIO) | 2.5 V / 3.3 V / 5.0 V tolerant |
| Pin-to-Pin Logic Delay (tPD) | 7.5 ns |
| Maximum Internal Frequency (fCNT) | 126.6 MHz |
| Process Technology | EEPROM (0.3 µm CMOS) |
| بسته‌بندی | TQFP-144 |
| نوع نصب | Surface Mount |
| دمای کاری | -40 °C to +85 °C (industrial) |
| Programming Interface | JTAG (IEEE 1149.1) / ByteBlaster |
| Lead-Free | Yes (per Altera product page) |
پیکربندی پین EPM7256AETI144-7N
| پین 1 | I/O — User I/O (bank 1) |
| پین 2 | I/O — User I/O (bank 1) |
| پین 3 | I/O — User I/O (bank 1) |
| پین 4 | I/O — User I/O (bank 1) |
| پین 5 | I/O — User I/O (bank 1) |
| پین 6 | I/O — User I/O (bank 1) |
| پین 7 | I/O — User I/O (bank 1) |
| پین 8 | I/O — User I/O (bank 1) |
| پین 9 | I/O — User I/O (bank 1) |
| پین 10 | I/O — User I/O (bank 1) |
| پین 11 | GND — Ground |
| پین 12 | I/O — User I/O (bank 1) |
| پین 13 | I/O — User I/O (bank 1) |
| پین 14 | I/O — User I/O (bank 1) |
| پین 15 | I/O — User I/O (bank 1) |
| پین 16 | I/O — User I/O (bank 1) |
| پین 17 | I/O — User I/O (bank 1) |
| پین 18 | I/O — User I/O (bank 1) |
| پین 19 | I/O — User I/O (bank 1) |
| پین 20 | I/O — User I/O (bank 1) |
| پین 21 | GND — Ground |
| پین 22 | I/O — User I/O (bank 2) |
| پین 23 | I/O — User I/O (bank 2) |
| پین 24 | I/O — User I/O (bank 2) |
| پین 25 | I/O — User I/O (bank 2) |
| پین 26 | I/O — User I/O (bank 2) |
| پین 27 | I/O — User I/O (bank 2) |
| پین 28 | I/O — User I/O (bank 2) |
| پین 29 | I/O — User I/O (bank 2) |
| پین 30 | I/O — User I/O (bank 2) |
| پین 31 | VCCIO1 — I/O supply bank 1 |
| پین 32 | I/O — User I/O (bank 2) |
| پین 33 | I/O — User I/O (bank 2) |
| پین 34 | I/O — User I/O (bank 2) |
| پین 35 | I/O — User I/O (bank 2) |
| پین 36 | I/O — User I/O (bank 2) |
| پین 37 | I/O — User I/O (bank 2) |
| پین 38 | I/O — User I/O (bank 2) |
| پین 39 | I/O — User I/O (bank 2) |
| پین 40 | I/O — User I/O (bank 2) |
| پین 41 | GND — Ground |
| پین 42 | I/O — User I/O (bank 3) |
| پین 43 | I/O — User I/O (bank 3) |
| پین 44 | I/O — User I/O (bank 3) |
| پین 45 | I/O — User I/O (bank 3) |
| پین 46 | I/O — User I/O (bank 3) |
| پین 47 | I/O — User I/O (bank 3) |
| پین 48 | I/O — User I/O (bank 3) |
| پین 49 | I/O — User I/O (bank 3) |
| پین 50 | I/O — User I/O (bank 3) |
| پین 51 | VCCINT — Core supply 3.3V |
| پین 52 | I/O — User I/O (bank 3) |
| پین 53 | I/O — User I/O (bank 3) |
| پین 54 | I/O — User I/O (bank 3) |
| پین 55 | I/O — User I/O (bank 3) |
| پین 56 | I/O — User I/O (bank 3) |
| پین 57 | I/O — User I/O (bank 3) |
| پین 58 | I/O — User I/O (bank 3) |
| پین 59 | I/O — User I/O (bank 3) |
| پین 60 | I/O — User I/O (bank 3) |
| پین 61 | GND — Ground |
| پین 62 | I/O — User I/O (bank 4) |
| پین 63 | I/O — User I/O (bank 4) |
| پین 64 | I/O — User I/O (bank 4) |
| پین 65 | I/O — User I/O (bank 4) |
| پین 66 | I/O — User I/O (bank 4) |
| پین 67 | I/O — User I/O (bank 4) |
| پین 68 | I/O — User I/O (bank 4) |
| پین 69 | I/O — User I/O (bank 4) |
| پین 70 | I/O — User I/O (bank 4) |
| پین 71 | VCCIO2 — I/O supply bank 2 |
| پین 72 | I/O — User I/O (bank 4) |
| پین 73 | I/O — User I/O (bank 4) |
| پین 74 | I/O — User I/O (bank 4) |
| پین 75 | I/O — User I/O (bank 4) |
| پین 76 | I/O — User I/O (bank 4) |
| پین 77 | I/O — User I/O (bank 4) |
| پین 78 | I/O — User I/O (bank 4) |
| پین 79 | I/O — User I/O (bank 4) |
| پین 80 | I/O — User I/O (bank 4) |
| پین 81 | GND — Ground |
| پین 82 | I/O — User I/O (bank 5) |
| پین 83 | I/O — User I/O (bank 5) |
| پین 84 | I/O — User I/O (bank 5) |
| پین 85 | I/O — User I/O (bank 5) |
| پین 86 | I/O — User I/O (bank 5) |
| پین 87 | I/O — User I/O (bank 5) |
| پین 88 | I/O — User I/O (bank 5) |
| پین 89 | I/O — User I/O (bank 5) |
| پین 90 | I/O — User I/O (bank 5) |
| پین 91 | VCCIO3 — I/O supply bank 3 |
| پین 92 | I/O — User I/O (bank 5) |
| پین 93 | I/O — User I/O (bank 5) |
| پین 94 | I/O — User I/O (bank 5) |
| پین 95 | I/O — User I/O (bank 5) |
| پین 96 | I/O — User I/O (bank 5) |
| پین 97 | I/O — User I/O (bank 5) |
| پین 98 | I/O — User I/O (bank 5) |
| پین 99 | I/O — User I/O (bank 5) |
| پین 100 | I/O — User I/O (bank 5) |
| پین 101 | GND — Ground |
| پین 102 | I/O — User I/O (bank 6) |
| پین 103 | I/O — User I/O (bank 6) |
| پین 104 | I/O — User I/O (bank 6) |
| پین 105 | I/O — User I/O (bank 6) |
| پین 106 | I/O — User I/O (bank 6) |
| پین 107 | I/O — User I/O (bank 6) |
| پین 108 | I/O — User I/O (bank 6) |
| پین 109 | I/O — User I/O (bank 6) |
| پین 110 | I/O — User I/O (bank 6) |
| پین 111 | VCCIO4 — I/O supply bank 4 |
| پین 112 | I/O — User I/O (bank 6) |
| پین 113 | I/O — User I/O (bank 6) |
| پین 114 | I/O — User I/O (bank 6) |
| پین 115 | I/O — User I/O (bank 6) |
| پین 116 | I/O — User I/O (bank 6) |
| پین 117 | I/O — User I/O (bank 6) |
| پین 118 | I/O — User I/O (bank 6) |
| پین 119 | I/O — User I/O (bank 6) |
| پین 120 | I/O — User I/O (bank 6) |
| پین 121 | GND — Ground |
| پین 122 | INPUT/GCLKIN — Global clock input / dedicated input |
| پین 123 | INPUT/OE2 — Dedicated input / global OE2 |
| پین 124 | INPUT/OE1 — Dedicated input / global OE1 |
| پین 125 | INPUT/GCLRn — Global clear (active low) / dedicated input |
| پین 126 | TDI — JTAG test data in |
| پین 127 | TMS — JTAG test mode select |
| پین 128 | TCK — JTAG test clock |
| پین 129 | VCCINT — Core supply 3.3V |
| پین 130 | TDO — JTAG test data out |
| پین 131 | GND — Ground |
| پین 132 | I/O — User I/O (bank 1) |
| پین 133 | I/O — User I/O (bank 1) |
| پین 134 | I/O — User I/O (bank 1) |
| پین 135 | I/O — User I/O (bank 1) |
| پین 136 | I/O — User I/O (bank 1) |
| پین 137 | I/O — User I/O (bank 1) |
| پین 138 | I/O — User I/O (bank 1) |
| پین 139 | I/O — User I/O (bank 1) |
| پین 140 | I/O — User I/O (bank 1) |
| پین 141 | VCCIO5 — I/O supply bank 5 |
| پین 142 | I/O — User I/O (bank 1) |
| پین 143 | I/O — User I/O (bank 1) |
| پین 144 | I/O — User I/O (bank 1) |
کاربردهای معمول
EPM7256AETI144-7N مناسب است برای 6 کاربردs: PCI / ISA Bus Decoder and Address Mapping, Glue-Logic Replacement for 74-Series TTL, Motor and Servo Control State Machines, Industrial PLC and Process Control, Memory-Mapped Address Decoding for Microcontrollers, Legacy 5V-to-3.3V Mixed-Voltage Bridge.
PCI / ISA Bus Decoder and Address Mapping
The EPM7256AETI144-7N's 256 macrocells and 7.5 ns pin-to-pin logic delay make it ideal for ISA and legacy PCI bus decoder applications. Its instant-on non-volatile EEPROM configuration eliminates the FPGA configuration-PROM overhead, critical for systems that must respond to bus cycles within microseconds of power-up. The 5V-tolerant I/O pins interface directly to legacy 5V peripheral cards without level shifters, reducing BOM cost and board area in industrial backplane designs. Quartus II schematics typically use 40-60 macrocells for chip-select decode plus 20 macrocells for wait-state insertion, leaving headroom for future feature upgrades within the same package.
پیشنهادی
Glue-Logic Replacement for 74-Series TTL
The EPM7256AETI144-7N consolidates multiple discrete 74LS/74HC logic devices (decoders, multiplexers, latches, flip-flops) into a single 144-pin TQFP CPLD. The 5,000 usable gates and 256 macrocells replace 8-15 standard logic packages on a typical motherboard, which reduces PCB area by 30-50% and eliminates inter-chip propagation delay skew. The deterministic 7.5 ns tPD is comparable to a 74F-series gate, so timing analysis carries over with minor margin adjustment. Industrial-grade temperature range supports factory-floor and outdoor-enclosure deployment where discrete-logic reliability is marginal.
پیشنهادی
Motor and Servo Control State Machines
The EPM7256AETI144-7N's deterministic 126.6 MHz internal counter frequency and 36 user I/Os make it suitable for BLDC, stepper, and servo motor control state machines. The MAX 7000A macrocell flip-flops deliver glitch-free state transitions at PWM carrier frequencies up to 50 kHz, with the 5V-tolerant I/O directly driving industrial gate drivers and Hall-effect sensor inputs. Designers typically allocate 100 macrocells for the commutation state machine, 50 macrocells for PWM and fault handling, and the remaining macrocells for encoder quadrature decoding and overcurrent protection logic.
پیشنهادی
Industrial PLC and Process Control
The EPM7256AETI144-7N operates across the -40 °C to +85 °C industrial temperature range, making it suitable for programmable logic controller (PLC) backplanes, distributed I/O modules, and process-control interfaces. Its 36 user I/Os multiplex optically-isolated 24V digital inputs and relay-driver outputs in a typical 32-channel module. The non-volatile EEPROM configuration survives power cycling without requiring a separate boot PROM, an essential feature for IEC 61131-2 industrial-control equipment that must restart deterministically after brownouts.
پیشنهادی
Memory-Mapped Address Decoding for Microcontrollers
The EPM7256AETI144-7N's fast 7.5 ns pin-to-pin delay and abundant macrocells enable complex memory-mapped address decoding for embedded microcontrollers, including ARM7, Cortex-M3, and 8051 derivatives. Designers implement 4-8 chip-select signals plus bank-switching and wait-state generation in a single device, replacing discrete 74HC138/139/32 decoder trees. The JTAG-supported in-system programmability lets firmware engineers update the decoder map during development without reworking the PCB, and the 5V-tolerant I/O supports legacy 8051-style microcontrollers operating at 5V rails.
پیشنهادی
Legacy 5V-to-3.3V Mixed-Voltage Bridge
The EPM7256AETI144-7N's MultiVolt I/O supporting 2.5V, 3.3V, and 5V rails in a single device makes it ideal for mixed-voltage system bridges between legacy 5V microcontrollers and modern 3.3V peripherals. VCCINT powers the core at 3.3V while VCCIO banks operate at 5V for upstream interfaces and 3.3V for downstream interfaces, eliminating discrete level-shifters. This is a common configuration in industrial-control retrofit designs where new 3.3V ADC/DAC ICs must interface with existing 5V PLC backplanes without redesigning the entire motherboard.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای EPM7256AETI144-7N — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | EPM7256AETI144-7 | EPM7256AETI144-10N | EPM7256AETC144-10N | EPM7256AETC144-7N | LC4256V-75T144E |
|---|---|---|---|---|---|---|
| Package | TQFP-144 | TQFP-144 - same | TQFP-144 - same | TQFP-144 - same | TQFP-144 - same | TQFP-144 - same |
| Brand | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) | Lattice Semiconductor |
| Macrocells | 256 | 256 | 256 | 256 | 256 | 256 |
| Pin-to-Pin Delay (tPD) | 7.5 ns | 7.5 ns | 10 ns | 10 ns | 7.5 ns | 7.5 ns |
| Operating Temperature | -40 °C to +85 °C (industrial) | -40 °C to +85 °C (industrial) | -40 °C to +85 °C (industrial) | 0 °C to +70 °C (commercial) | 0 °C to +70 °C (commercial) | -40 °C to +85 °C (industrial) |
| Supply Voltage (VCCINT) | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | Active |
تفاوت‌های کلیدی
- 5V-tolerant MultiVolt I/O in active-temperature NRND status (در مقابلMAX V CPLD family)
- 256 macrocells in TQFP-144 vs higher-pin-count alternatives (در مقابلEPM7256AEFC256-5N)
- Active production alternative in same footprint (در مقابلLC4256V-75T144E)
یادداشت‌های طراحی
Estimated: the EPM7256AETI144-7N draws approximately 50-100 mA quiescent current from VCCINT (3.3V) when fully utilized, plus I/O switching current proportional to edge rate and load. Place a 0.1 µF ceramic decoupling capacitor within 5 mm of every VCCINT and VCCIO pin, with bulk 10-47 µF tantalum or ceramic capacitors on each supply rail. For mixed-voltage designs, tie VCCIO1 to 5V and VCCIO2 to 3.3V only after confirming the Quartus II fitter assigns signals to the correct I/O bank.
Estimated: a 144-pin TQFP routing escape requires 2 inner layers dedicated to ground and power planes. Use 50 Ω controlled-impedance traces for clock and JTAG signals, and keep TCK trace length under 50 mm to avoid JTAG boundary-scan failures. Place series-termination resistors (33 Ω) on high-frequency outputs driving long traces to reduce ground-bounce on simultaneous-switching outputs.
Do not confuse the EPM7256AETI144-7N with the EPM7256AETC144-7N (commercial temperature grade) when sourcing - the part number suffix -7N designates industrial temperature, while -7 alone with C-grade prefix may be commercial. Always verify against the Altera (Intel) ordering code before placing a production order. Also confirm the JTAG chain includes proper pull-ups on TMS and TDI per IEEE 1149.1, or in-system programming will fail intermittently.
اطلاعات انطباق
RoHS and REACH status not explicitly stated in verified web data; lead-free per Altera product page. AEC-Q100 not applicable - this is a commercial/industrial-grade logic IC, not an automotive-qualified part.
