EPM7256SRC208-7 - 256-Macrocell 5V CPLD | Altera | 208-Pin RQFP
MPN: EPM7256SRC208-7 ✗ End of Life| Qty | Unit Price | Extended |
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| 500 | $0 | $0.00 |
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Drop-in alternatives for EPM7256SRC208-7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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EPM7256SRC208-10
✅ Drop-In✓ In Stock
$27.2 / Unit
View Datasheet →EPM7256SRC208-15N
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$27.2 / Unit
View Datasheet →EPM7256SRC208-7N
✅ Drop-In📋 Reference alternative (not in catalog)
EPM7256SQC208-7
✅ Drop-In✓ In Stock
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View Datasheet →EPM7256SQC208-10
✅ Drop-In✓ In Stock
$11.2 / Unit
View Datasheet →EPM7256SQC208-15
✅ Drop-In✓ In Stock
$3.65 / Unit
View Datasheet →EPM7256SRC208-7 Maximum Ratings & Electrical Characteristics
| Family | MAX 7000S |
| Device Type | EEPROM-based Complex Programmable Logic Device (CPLD) |
| Macrocells | 256 |
| Usable Gates | 5,000 |
| User I/O Pins | 164 |
| Pin-to-Pin Propagation Delay (tPD) | 7.5 ns |
| Maximum Internal Frequency (fMAX) | 128.2 MHz |
| Supply Voltage (VCCINT/VCCIO) | 5 V |
| Configuration Memory | EEPROM (non-volatile) |
| Package | 208-pin RQFP (PowerQuad Flat Pack) |
| Package Code | FQFP |
| Terminal Form | Gull Wing |
| Number of Terminals | 208 |
| Mounting Type | Surface Mount |
| Operating Temperature Grade | Commercial (0C to +70C) |
| Speed Grade | -7 (fastest standard grade) |
| Packaging | Tray |
EPM7256SRC208-7 fqfp Pin Configuration Guide
Complete pinout information for EPM7256SRC208-7 (fqfp 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 EPM7256SRC208-7.
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
EPM7256SRC208-7 is suitable for 6 applications: Legacy 5 V Bus Glue Logic, Industrial Control Backplane Logic, Telecom Line-Card Address Decoding, Test and Measurement Instrumentation, Legacy Equipment Spares and Repair, Industrial Automation I/O Expansion.
Legacy 5 V Bus Glue Logic
The EPM7256SRC208-7 fits legacy 5 V bus glue logic because its 5 V core and I/O interface directly to TTL/CMOS backplanes without level shifters, and its 164 I/Os can absorb wide address and data buses. With 7.5 ns pin-to-pin delay and 128.2 MHz fMAX, it implements address decoding, wait-state generation, and chip-select logic fast enough for ISA and early PCI timing. Designers replace dozens of 74-series gates with one 208-pin RQFP device, cutting board area and part count. The EEPROM array is non-volatile, so the logic is live at power-up with no configuration PROM. A trade-off is that the 5 V core dissipates more power than modern 1.8 V CPLDs, so provide adequate copper for thermal relief.
Recommended
Industrial Control Backplane Logic
In industrial control backplanes, the EPM7256SRC208-7 consolidates board-select, interrupt arbitration, and handshake logic into a single non-volatile CPLD. Its 256 macrocells and 164 I/Os handle multi-slot address decoding, while the 7.5 ns propagation delay keeps backplane cycle times short. Because the MAX 7000S array is EEPROM-based, the logic survives power cycling without a boot device, which is critical for factory equipment that must restart deterministically. The 5 V interface matches legacy industrial I/O racks directly. Designers should note the commercial temperature grade (0C to +70C); for wider ambient ranges, verify the specific grade or add thermal management. The 208-pin RQFP footprint is shared across speed grades, simplifying spares planning.
Recommended
Telecom Line-Card Address Decoding
The EPM7256SRC208-7 suits telecom line-card address decoding because its 164 I/Os can map wide backplane buses and its 128.2 MHz fMAX supports fast state machines. The device implements slot-ID comparison, chip-select fan-out, and interrupt aggregation in one 208-pin RQFP package, replacing discrete logic and reducing line-card footprint. Non-volatile EEPROM configuration means the card is functional immediately after power-up, avoiding the configuration latency of SRAM-based FPGAs. The 5 V I/O matches legacy telecom backplanes. A design consideration is that the MAX 7000S family is mature, so new line-card designs should evaluate MAX V while existing cards can continue using the EPM7256SRC208-7 as a drop-in. Confirm the RQFP land pattern and thermal pad before layout.
Recommended
Test and Measurement Instrumentation
The EPM7256SRC208-7 is used in test and measurement instrumentation for trigger logic, counter control, and front-panel interface glue. Its 7.5 ns pin-to-pin delay supports timing-critical trigger paths, and 256 macrocells implement multiple counters and state machines in one device. The 5 V I/O interfaces directly to legacy instrument buses, and the non-volatile EEPROM array ensures the instrument boots into a known logic state without configuration memory. The 208-pin RQFP package provides 164 I/Os for wide data paths. Designers should account for the commercial temperature grade and provide adequate decoupling on the 5 V rail. Because the family is mature, keep a qualified drop-in such as EPM7256SRC208-10 or EPM7256SRC208-7N in the approved-vendor list for long-life instruments.
Recommended
Legacy Equipment Spares and Repair
The EPM7256SRC208-7 is a common spare for legacy equipment repair because it is a socket-compatible MAX 7000S CPLD in the 208-pin RQFP package. Repair depots stock the -7, -10, and -15 speed grades and the lead-free -7N variant, all of which share the same 256-macrocell die and pinout, so a single board can be repaired with any available grade. The non-volatile EEPROM configuration means a replacement device retains its programmed logic without a configuration file, simplifying field replacement. A key consideration is authenticity: because the family is mature, source parts from franchised or traceable channels and verify date codes. Confirm the RQFP land pattern and exposed pad before rework.
Recommended
Industrial Automation I/O Expansion
The EPM7256SRC208-7 supports industrial automation I/O expansion by implementing parallel I/O expansion, debounce logic, and handshake state machines in a single non-volatile CPLD. Its 164 I/Os can drive multiple I/O modules, and 256 macrocells absorb the glue logic that would otherwise require several discrete devices. The 5 V interface matches legacy automation racks, and the EEPROM array keeps the logic live at power-up for deterministic machine startup. The 7.5 ns delay supports fast handshake cycles. Designers should note the commercial temperature grade and add thermal relief for the 5 V core. For new designs, evaluate MAX V or MAX 10; for existing racks, the EPM7256SRC208-7 remains a drop-in with same-family alternatives available.
Recommended
Recommended Products Summary
Engineering reference data for EPM7256SRC208-7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPM7256SRC208-10 | EPM7256SRC208-15 | EPM7256SRC208-7N | EPM7256SQC208-7 |
|---|---|---|---|---|---|
| Package | 208-pin RQFP | 208-pin RQFP - same | 208-pin RQFP - same | 208-pin RQFP - same | 208-pin PQFP |
| Brand | Altera | Altera | Altera | Altera | Altera |
| Macrocells | 256 | 256 | 256 | 256 | 256 |
| User I/O Pins | 164 | 164 | 164 | 164 | 164 |
| Pin-to-Pin Delay (tPD) | 7.5 ns | 10 ns | 15 ns | 7.5 ns | 7.5 ns |
| Maximum Internal Frequency (fMAX) | 128.2 MHz | [DATA_NEEDED: fMAX for -10 grade] | [DATA_NEEDED: fMAX for -15 grade] | 128.2 MHz | 128.2 MHz |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Configuration Memory | EEPROM (non-volatile) | EEPROM (non-volatile) | EEPROM (non-volatile) | EEPROM (non-volatile) | EEPROM (non-volatile) |
| Lead-Free Finish | [DATA_NEEDED: lead-free finish] | [DATA_NEEDED: lead-free finish] | [DATA_NEEDED: lead-free finish] | Yes (N suffix) | [DATA_NEEDED: lead-free finish] |
| Speed Grade | -7 | -10 | -15 | -7 | -7 |
Key Differentiators
- Fastest standard MAX 7000S speed grade (vs EPM7256SRC208-10)
- Non-volatile EEPROM configuration (vs EPM7256SQC208-7)
- Lead-free drop-in available (vs EPM7256SRC208-7N)
Design Notes
Decouple every VCC pin of the EPM7256SRC208-7 with a 0.1 uF ceramic capacitor placed within 5 mm of the pin, plus at least one 10 uF bulk capacitor per power plane. The 5 V EEPROM-based MAX 7000S core draws transient current during macrocell switching; inadequate decoupling causes ground bounce and erratic logic. Estimated: at 128.2 MHz with 164 I/Os switching, supply transients can exceed 200 mV without local decoupling. Follow the MAX 7000 family recommended decoupling scheme.
The 208-pin RQFP uses a gull-wing lead frame with an exposed thermal pad. Solder the exposed pad to a matching copper land connected to ground with multiple vias to spread heat and provide a low-impedance return. Verify the land pattern against the MAX 7000 family package drawing before layout, and confirm pin 1 orientation. Estimated: the exposed pad improves thermal resistance by roughly 20-30% versus a non-pad RQFP, based on typical package behavior.
Do not assume the EPM7256SRC208-7 is pin-compatible with the PQFP EPM7256SQC208-7 without checking the land pattern: both are 208-pin but the RQFP and PQFP bodies differ. Also confirm the speed grade before substituting a -10 or -15 part, since slower grades reduce timing margin. Finally, the MAX 7000S family is mature; source from traceable channels and verify date codes to avoid counterfeit devices.
Compliance Information
Compliance data for EPM7256SRC208-7 was not present in the verified web data. The -7N variant is understood to be the lead-free (RoHS) version, but this was not confirmed by the retrieved sources. Verify compliance with the manufacturer or distributor before design release.
