Altera

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

MPN: EPM3256ATI144-7N ✗ Akhir Hidup

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

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EPM3256ATI144-7N Ringkasan

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.

Alternatif penggantian untuk EPM3256ATI144-7N — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.

Variasi di dalam seri ini

Model-series yang sama yang kompatibel dengan penggantian EPM3256ATI144-7N (sama faktor bentuk dan footprint) — berbeda di dalam 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