Altera

EPM3256AQI208-10 - MAX 3000A 256-Macro CPLD, 10ns, PQFP-208 | Altera

Name: EPM3256AQI208-10 - MAX 3000A 256-Macro CPLD, 10ns, PQFP-208 | Altera
Brand: Altera
SKU: EPM3256AQI208-10

MPN: EPM3256AQI208-10 ✗ Akhir Hidup

3.3 V Vdss 208-pin PQFP (Plastic Quad Flat Pack), FQFP code Package 95.2 MHz Speed

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EPM3256AQI208-10 Ringkasan

The Altera EPM3256AQI208-10 is a high-performance, low-cost CMOS EEPROM-based Complex Programmable Logic Device (CPLD) from the MAX 3000A family, packaged in a 208-pin Plastic Quad Flat Pack (PQFP) with industrial temperature grade and 10ns pin-to-pin propagation delay. The device integrates 256 macro cells, 5,000 usable gates, and 161 user I/Os, and is rated for a maximum counter frequency of 95.2 MHz with internal counter speeds up to 227.3 MHz. It supports 3.3-V in-system programmability (ISP) via IEEE 1149.1 JTAG and MultiVolt I/O interfaces that allow the 3.3-V core to interoperate with 5.0-V, 3.3-V, and 2.5-V logic levels.

A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic device that combines multiple PAL-style logic array blocks with a central interconnect matrix, sitting in the hierarchy between simple SPLDs/GALs and larger FPGAs. CPLDs are characterized by deterministic, near-zero standby power, instant-on behavior, and predictable timing - making them preferred for glue logic, bus interfacing, and state-machine control rather than high-density data-path processing.

Key features of the EPM3256AQI208-10 include 4.5-ns pin-to-pin logic delays, a 10ns tPD in the -10 speed grade, PCI-SIG compliance per PCI Local Bus Specification Revision 2.2, and open-drain or programmable I/O standards. The MAX 3000A family is supported by the Altera Quartus development environment (legacy MAX+PLUS II also supports it). The 208-pin PQFP offers a fine-pitch gull-wing solution for boards where high I/O count is needed in a manageable surface-mount footprint.

The EPM3256AQI208-10 architecture uses EEPROM configuration memory, so the design loads at power-up without external boot memory and retains programming across power cycles. Each macro cell contains a programmable AND/OR array plus a configurable flip-flop, and the logic array blocks (LABs) feed a fast programmable interconnect array (PIA) shared across the device.

Typical applications include PCI bus interface glue logic, microcontroller address decoding, bus arbitration, I/O expansion, industrial control state machines, and legacy peripheral replacement. The 161 usable I/Os are sufficient for parallel interfaces, address/data bus steering, and multi-channel control planes. Designers also use this part for board-level configuration, interrupt steering, and timing-sensitive control logic where FPGAs would be overkill.

When designing with the EPM3256AQI208-10, observe the MAX 3000A I/O standard selection rules and provide proper decoupling (0.1 uF per VCC pin group, plus bulk capacitance). Unused I/O pins should be left floating or driven, never tied to opposing rails. JTAG programming requires TCK/TMS/TDI/TDO pulled to defined states per IEEE 1149.1.

This page consolidates distributor stock, drop-in alternative MPNs from the MAX 3000A family, and design notes not found in the standalone datasheet - including PCI compliance context, JTAG ISP considerations, and PQFP layout guidance.

Alternatif penggantian untuk EPM3256AQI208-10 — 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 EPM3256AQI208-10 (sama faktor bentuk dan footprint) — berbeda di dalam Operating Temperature, Package, Usable Gates, User I/Os, Propagation Delay (tPD).

EPM3256AQC208-10

Altera

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

Package: 208-BFQFP (PQFP, Gull Wing)