EPM7256SRI208-10 - 256-Macrocell MAX 7000S CPLD | Intel
MPN: EPM7256SRI208-10 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $42.5 | $42.50 |
| 10 | $38.25 | $382.50 |
| 100 | $34 | $3,400.00 |
| 500 | $30.6 | $15,300.00 |
| 1,000 | $27.2 | $27,200.00 |
Drop-in alternatives for EPM7256SRI208-10 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
EPM7256SRI208-10N
✅ Drop-In📋 Reference alternative (not in catalog)
EPM7256SRC208-10
✅ Drop-In✓ In Stock
$27.2 / Unit
View Datasheet →EPM7256SRC208-10N
✅ Drop-In✓ In Stock
$27.2 / Unit
View Datasheet →EPM7256SQC208-10
✅ Drop-In✓ In Stock
$11.2 / Unit
View Datasheet →EPM7256SQC208-12
✅ Drop-In📋 Reference alternative (not in catalog)
EPM7256SQC208-15
✅ Drop-In✓ In Stock
$3.65 / Unit
View Datasheet →EPM7256SRI208-10 Maximum Ratings & Electrical Characteristics
| Logic Family | MAX 7000S (EEPROM-based CPLD) |
| Macrocells | 256 |
| Logic Array Blocks | 16 |
| Usable Gates | 5,000 |
| User I/O Pins | 164 |
| Pin-to-Pin Propagation Delay (tPD) | 10 ns |
| Maximum Internal Frequency | 100 MHz |
| Supply Voltage (Internal) | 4.5 V to 5.5 V |
| Logic Family Technology | CMOS |
| Programmable Type | In-System Programmable (ISP) via JTAG |
| Package | 208-pin RQFP (PowerQuad) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | Industrial (-40C to +85C) |
| Configuration Memory | EEPROM (non-volatile) |
| JTAG Boundary Scan | Yes (BST circuitry) |
| Packaging | Tray |
EPM7256SRI208-10 208-pin rqfp (powerquad) Pin Configuration Guide
Complete pinout information for EPM7256SRI208-10 (208-pin rqfp (powerquad) package) with 164 pins. This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for EPM7256SRI208-10.
Refer to the datasheet for full pin configuration.
Estimated pin count: 164 pins (digital package)
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
EPM7256SRI208-10 is suitable for 6 applications: Telecom Line-Card Glue Logic, Industrial Control Backplane Logic, Legacy Bus Bridging (ISA/PCI), Instrumentation State Machines, Industrial Automation I/O Expansion, Legacy Equipment Repair and Spares.
Telecom Line-Card Glue Logic
The EPM7256SRI208-10 fits telecom line-card glue logic because its 164 user I/O pins and 256 macrocells can absorb address decoding, bus arbitration, and control state machines that would otherwise require dozens of discrete 74-series devices. Its 10 ns pin-to-pin delay supports the timing margins of legacy 5 V telecom backplanes, and EEPROM configuration gives instant-on operation so the card boots deterministically without an external configuration PROM. Placed between the backplane interface and the line-interface ASIC, it consolidates glue logic and reduces board area. The trade-off is that the part is obsolete, so designers should qualify a pin-compatible MAX 7000S variant before committing to volume production.
Recommended
Industrial Control Backplane Logic
In industrial control backplanes, the EPM7256SRI208-10 provides the wide I/O count (164 pins) and 256 macrocells needed to implement custom bus protocols, chip-select decoding, and interlock state machines. Its industrial temperature rating (-40C to +85C) and 5 V CMOS I/O make it compatible with legacy industrial logic levels, while the 10 ns propagation delay keeps deterministic timing for safety interlocks. The device is typically placed between the host controller and the field I/O interface, replacing a board full of discrete logic. Because it is EEPROM-based, it retains configuration through power cycles, which is important for equipment that must restart into a known state without a host-assisted boot sequence.
Recommended
Legacy Bus Bridging (ISA/PCI)
The EPM7256SRI208-10 is well suited to legacy bus bridging between ISA, PCI, and proprietary backplanes because its 164 I/O pins can directly interface wide address and data buses, and its 256 macrocells implement the protocol translation state machines. A 10 ns pin-to-pin delay supports the timing of 5 V legacy buses, and the 5 V CMOS I/O avoids level-shifter overhead. The CPLD is placed between the legacy bus connector and the modern host bridge, translating control and handshake signals. The main design consideration is that the part is obsolete, so a pin-compatible MAX 7000S replacement should be qualified; the EEPROM architecture also means no configuration flash is required on the board.
Recommended
Instrumentation State Machines
For instrumentation state machines, the EPM7256SRI208-10 offers deterministic single-cycle timing (10 ns pin-to-pin) that is essential for trigger sequencing, sample-clock generation, and measurement handshakes. Its 256 macrocells can implement multiple concurrent state machines, while 164 I/O pins interface front-panel controls, ADCs, and display drivers. The 5 V supply and CMOS I/O match legacy instrument rails, and EEPROM configuration ensures the instrument powers up in a defined state. The device is typically placed at the center of the digital control board, coordinating acquisition and display logic. Because the part is obsolete, designers should plan a migration path to a pin-compatible MAX 7000S variant or a modern CPLD.
Recommended
Industrial Automation I/O Expansion
The EPM7256SRI208-10 can serve as an I/O expansion and protocol-conversion device in industrial automation, where its 164 user I/O pins aggregate sensor inputs, relay drivers, and fieldbus interfaces into a single programmable device. The 256 macrocells implement debounce logic, PWM generation, and handshake state machines, while the 10 ns propagation delay keeps response times deterministic. Its industrial temperature range supports factory-floor environments, and the 5 V CMOS I/O interfaces directly with legacy 24 V field logic through standard drivers. The CPLD sits between the field I/O and the host PLC, reducing wiring and board count. The key trade-off is obsolescence, so a pin-compatible replacement should be qualified for long-life automation platforms.
Recommended
Legacy Equipment Repair and Spares
The EPM7256SRI208-10 is frequently required for repair and spares of legacy equipment, where a failed CPLD must be replaced without redesigning the board. Because the part is obsolete, sourcing is the primary challenge, and pin-compatible MAX 7000S variants such as the EPM7256SRI208-10N, EPM7256SRC208-10, and EPM7256SQC208-10 allow a drop-in repair when the original is unavailable. The 208-pin RQFP footprint and identical 256-macrocell logic ensure the replacement fits the existing land pattern, and the EEPROM configuration can be reprogrammed with the original JEDEC file via JTAG. The main consideration is verifying the speed grade and temperature rating match the original application before substitution.
Recommended
Recommended Products Summary
Engineering reference data for EPM7256SRI208-10 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPM7256SRI208-10N | EPM7256SRC208-10 | EPM7256SQC208-10 | EPM7256SQC208-12 |
|---|---|---|---|---|---|
| Package | 208-pin RQFP | 208-pin RQFP - same | 208-pin RQFP - same | 208-pin RQFP - same | 208-pin RQFP - same |
| Brand | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) |
| Macrocells | 256 | 256 | 256 | 256 | 256 |
| User I/O Pins | 164 | 164 | 164 | 164 | 164 |
| Pin-to-Pin Delay (tPD) | 10 ns | 10 ns | 10 ns | 10 ns | 12 ns |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Commercial (0C to +70C) | Commercial (0C to +70C) |
| RoHS / Lead-Free | [DATA_NEEDED: RoHS status] | Lead-free (N suffix) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Industrial temperature range with 10 ns speed grade (vs EPM7256SRC208-10)
- Lead-free option available as a true drop-in (vs EPM7256SRI208-10N)
- Faster than the -12 and -15 speed grades (vs EPM7256SQC208-12)
Design Notes
The EPM7256SRI208-10 requires a 5 V supply within 4.5 V to 5.5 V. Decouple each VCC pin with a 0.1 uF ceramic capacitor placed as close to the pin as possible, plus a bulk 10 uF capacitor per power plane. Because the device is EEPROM-based, it draws programming current during ISP; ensure the supply can source the transient without dropping below 4.5 V, or the configuration may fail. Estimated: at 100 MHz with typical I/O loading, core current is on the order of tens of milliamps, but verify against the Altera MAX 7000 family datasheet power estimation tables for your specific design.
Route the 208-pin RQFP on a board with a solid ground plane and keep high-speed I/O traces short and matched. Place the JTAG header (TCK, TMS, TDI, TDO) close to the device and keep TCK traces away from noisy switching nodes to avoid programming failures. Because the part is obsolete, verify the land pattern against the Altera MAX 7000 family datasheet mechanical drawing before committing the PCB, as RQFP footprint dimensions must match exactly for a drop-in replacement.
The most common pitfall is assuming availability: the EPM7256SRI208-10 is obsolete, so a pin-compatible MAX 7000S variant (for example EPM7256SRI208-10N or EPM7256SRC208-10) should be qualified before production. Also confirm the speed grade and temperature range match the original application, since substituting a slower -12 or -15 grade reduces timing margin. Finally, always reprogram the replacement with the original JEDEC file via JTAG and verify the device signature before soldering, as counterfeit or mislabeled obsolete parts are common in the independent market.
Compliance Information
RoHS/REACH status not stated in the provided web data for the EPM7256SRI208-10. The lead-free variant EPM7256SRI208-10N is identified by its 'N' suffix. AEC-Q100 is not applicable to this commercial/industrial CPLD.
