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 ✗ Cuối đời

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

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MOQ: 1 |

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EPM3256AQI208-10 Tóm tắt

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.

Bộ thay thế dễ dàng lắp đặt cho EPM3256AQI208-10 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.

Các biến thể trong loạt này

Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với EPM3256AQI208-10 (cùng hình factor và footprint) — khác nhau ở 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)