Intel

EPM7256SRC208-10 - MAX 7000S CPLD 256 Macrocell 10ns | Intel

Name: EPM7256SRC208-10 - MAX 7000S CPLD 256 Macrocell 10ns | Intel
Brand: Intel
SKU: EPM7256SRC208-10

MPN: EPM7256SRC208-10 ✗ Cuối đời

4.75 V to 5.25 V Vdss 208-pin RQFP (BFQFP) exposed pad, 28x28 mm Package 100 MHz Speed

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EPM7256SRC208-10 Tóm tắt

The Intel (Altera) EPM7256SRC208-10 is a MAX 7000S-family Complex Programmable Logic Device (CPLD) with 256 macrocells, 5,000 usable gates, 164 user I/O pins, and a 10 ns maximum pin-to-pin propagation delay, housed in a 208-pin RQFP (BFQFP) exposed-pad package. It operates from a 4.75 V to 5.25 V supply and is in-system programmable via the IEEE 1149.1 JTAG interface.

A CPLD (Complex Programmable Logic Device) is a programmable logic IC built from an array of macrocells and a programmable interconnect matrix. Unlike an FPGA, which distributes logic in fine-grained lookup tables and routing fabric, a CPLD concentrates wide AND/OR product terms in each macrocell, giving deterministic, non-volatile, single-cycle timing. In the logic hierarchy, a CPLD sits between discrete glue logic and FPGAs: CPLD -> programmable logic device (PLD) -> digital logic IC -> semiconductor. The MAX 7000S family uses EEPROM configuration cells, so the design is retained without an external configuration PROM.

Key features include 256 macrocells organized into 16 logic array blocks (LABs), 164 user I/O pins, a 10 ns tPD (speed grade -10), and 100 MHz maximum operating frequency. The device supports in-system programmability (ISP) through the JTAG port, allowing field upgrades without removing the part from the board. The 208-pin RQFP package with exposed pad provides a compact 28x28 mm footprint for designs that would otherwise require dozens of 74-series glue-logic packages.

The MAX 7000S architecture uses a programmable interconnect array (PIA) to route signals between LABs, with each macrocell containing a flip-flop and programmable product-term logic. This architecture delivers predictable, fixed propagation delays independent of routing, which is critical for bus-interface and state-machine designs where timing closure must be guaranteed. The EEPROM process also provides excellent retention and immunity to single-event upsets compared with SRAM-based FPGAs.

Typical applications include PCI/ISA bus bridging, address decoding and chip-select generation, glue-logic consolidation in industrial controllers, legacy system maintenance, and prototyping of state machines. The 5 V supply and 5 V-tolerant I/O make it a natural fit for interfacing modern 3.3 V logic to legacy 5 V peripherals.

When designing with this device, note that the part is obsolete and should be designed out for new projects; for existing designs, ensure the JTAG chain is accessible for ISP and provide adequate decoupling on each VCC pin. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với EPM7256SRC208-10 (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, Operating Temperature Range, Speed Grade, Operating Temperature.

EPM7256SQC208-10

Intel

Package: 208-pin PQFP (SQC208)

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