EPM7256AETC144-7N - MAX 7000A CPLD, 256 Macrocells, 7.5ns | Intel
MPN: EPM7256AETC144-7N ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $50.62 | $50.62 |
| 10 | $45.5 | $455.00 |
| 100 | $38.9 | $3,890.00 |
| 250 | $33.2 | $8,300.00 |
| 500 | $29.75 | $14,875.00 |
Drop-in alternatives for EPM7256AETC144-7N — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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View Datasheet →EPM7256AETC144-7N Maximum Ratings & Electrical Characteristics
| Series | MAX 7000A |
| Programmable Type | In System Programmable (EEPROM) |
| Number of Macrocells | 256 |
| Number of Logic Elements / Blocks (LABs) | 16 |
| Number of Usable Gates | 5,000 |
| Number of I/O | 120 (max user I/O) |
| Propagation Delay tpd(1) Max | 7.5 ns |
| Maximum Counter Frequency | 126.6 MHz |
| Supply Voltage - Internal | 3.0 V to 3.6 V |
| Operating Temperature | 0 °C to 70 °C (Commercial) |
| Package / Case | 144-LQFP (TQFP-144, 20x20 mm) |
| Mounting Type | Surface Mount |
| Programming Interface | IEEE 1149.1 JTAG (ISP) |
| Configuration Memory | EEPROM (non-volatile) |
| RoHS Status | Compliant |
EPM7256AETC144-7N 144-lqfp (tqfp-144, 20x20 mm) Pin Configuration Guide
Complete pinout information for EPM7256AETC144-7N (144-lqfp (tqfp-144, 20x20 mm) package). 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 EPM7256AETC144-7N.
Refer to the datasheet for full pin configuration.
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
EPM7256AETC144-7N is suitable for 6 applications: Microcontroller / MPU I/O Expansion, Address Decoding and Chip-Select Generation, Industrial Control and Factory Automation, Legacy Bus Protocol Bridging, Telecom and Networking Line-Card Glue Logic, Test and Measurement Equipment.
Microcontroller / MPU I/O Expansion
The EPM7256AETC144-7N is well suited to expanding the limited I/O of a microcontroller or microprocessor. With 120 user I/Os available on the 144-pin TQFP package and 256 macrocells, it adds parallel ports, keypad matrices, segment-LCD drive lines and sensor interfaces without burdening the host CPU. The 7.5 ns pin-to-pin delay and 126.6 MHz counter frequency ensure deterministic timing for handshaking and interrupt generation. Power sequencing is straightforward because the MAX 7000A's EEPROM configuration boots in microseconds and needs no external boot PROM.
Recommended
Address Decoding and Chip-Select Generation
The EPM7256AETC144-7N consolidates wide address decoders that previously required multiple 74LS138/139 PLD packages into one 144-pin TQFP CPLD. Designers can map large memory regions for SRAM, DRAM, Flash and peripherals with sub-10 ns latency, freeing board area and shortening the BOM. The 5,000 usable gates are sufficient to implement several independent decode trees in one device, and JTAG-driven in-system programming makes late-stage address-map changes cheap. The 3.3 V I/O is compatible with most modern ARM and MIPS host buses.
Recommended
Industrial Control and Factory Automation
For glue logic on PLC backplanes, motor-driver front-ends and sensor-conditioning boards, the EPM7256AETC144-7N delivers deterministic state-machine control, PWM generation and protocol bridging in a single CPLD. Designers should select the EPM7256AETI144-7N pin-compatible variant when the application operates in the −40 °C to +85 °C industrial window. The MAX 7000A's open-drain output option and programmable slew rate simplify interfacing to 24 V industrial buses through external level shifters, and JTAG boundary-scan speeds up board test on the production line.
Recommended
Legacy Bus Protocol Bridging
The EPM7256AETC144-7N bridges legacy parallel buses (ISA, PC/104, VME) to modern processors without glue-logic sprawl. With 256 macrocells and 120 user I/Os it can implement full 16- or 32-bit bus transceivers, wait-state generators, interrupt controllers and DMA handshakes on one device. The 7.5 ns tpd keeps bus-cycle latency low and the JTAG port lets field engineers re-flash the bridge logic for new peripherals. Designers migrating from discrete 74FCT/74ABT logic packages find that one TQFP-144 CPLD replaces 8-15 discrete packages.
Recommended
Telecom and Networking Line-Card Glue Logic
Inside telecom line cards the EPM7256AETC144-7N handles time-slot switching, framer-to-DSP handshaking, alarm-collection and clock-distribution functions. Its 256 macrocells are well-matched to a multi-channel serial-agile interface, while the 126.6 MHz maximum counter frequency supports common 77.76 MHz and 155 MHz telecom clocks divided down. The non-volatile EEPROM boot avoids external configuration memory and gives instant-on behavior required by hot-swap line cards; the commercial temperature grade suits temperature-controlled central-office environments.
Recommended
Test and Measurement Equipment
The EPM7256AETC144-7N is ideal for the digital-control backplane of oscilloscopes, logic analyzers and bench-top instruments where deterministic timing is mandatory. The 256 macrocells can implement trigger sequencers, channel-multiplexer control, display-timing generators and front-panel scan matrices in one device, while the JTAG TAP supports built-in self-test routines. The 7.5 ns tpd aligns with sub-100 MHz sample-rate handshakes, and the commercial temperature grade is comfortable for indoor lab environments; field-deployable units should select the EPM7256AETI144-7N industrial variant instead.
Recommended
Recommended Products Summary
Engineering reference data for EPM7256AETC144-7N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPM7256AETI144-7N | EPM7256AETC144-5N | EPM7256AETC144-10N | EPM7256AETC144-10 | EPM7256AETI144-7 |
|---|---|---|---|---|---|---|
| Brand | Intel | Intel | Intel | Intel | Intel | Intel |
| Package | TQFP-144 (20x20 mm) | TQFP-144 (20x20 mm) - same | TQFP-144 (20x20 mm) - same | TQFP-144 (20x20 mm) - same | TQFP-144 (20x20 mm) - same | TQFP-144 (20x20 mm) - same |
| Macrocells | 256 | 256 | 256 | 256 | 256 | 256 |
| Pin-to-Pin Delay tpd(1) | 7.5 ns | 7.5 ns | 5.0 ns | 10.0 ns | 10.0 ns | 7.5 ns |
| Counter Frequency Max | 126.6 MHz | 126.6 MHz | [DATA_NEEDED] | 100 MHz (typical) | 100 MHz (typical) | 126.6 MHz |
| Operating Temperature | 0C to +70C (Commercial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Usable Gates | 5,000 | 5,000 | 5,000 | 5,000 | 5,000 | 5,000 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Mid-density MAX 7000A device with 256 macrocells and 120 I/Os in TQFP-144 (vs EPM7128AETC144-7N)
- Faster 7.5 ns speed grade compared with the 10 ns mainstream grade (vs EPM7256AETC144-10N)
- Drop-in industrial-temperature alternative available without PCB rework (vs EPM7256AETI144-7N)
Design Notes
Estimated: with VCC = 3.3 V, all 120 I/O switching at 10 MHz, 15 pF load, ICC is approximately 60-90 mA (vendor datasheet typical). Place a 0.1 uF X7R ceramic decoupling capacitor within 3 mm of every VCC/GND pair on the TQFP-144 footprint and add a single 10 uF bulk capacitor on each side of the package. The MAX 7000A EEPROM draws a brief (<= 200 ms per datasheet) programming current during JTAG in-system programming, so reserve at least 150 mA of headroom in your 3.3 V rail budget to avoid droop during ISP.
Reserve the four JTAG pins (TDI, TDO, TMS, TCK) on a dedicated 4-pin 2.54 mm header or 1.27 mm Tag-Connect footprint so engineers can re-program or boundary-scan the part on the bench and in production. The DEV_CLRn and DEV_OE pins must each have a defined logic level (pull-up or pull-down) at power-up; leaving them floating can cause random macrocell reset or tri-state behavior during boot. Keep high-speed outputs (counter clocks, address strobes) short and route them on the top layer over a continuous ground plane to control crosstalk and EMI.
Do not apply inputs above 3.6 V to the EPM7256AETC144-7N; the MAX 7000A I/O cells are not 5 V-tolerant and an over-voltage input can permanently damage the EEPROM sense circuitry. For designs that need 5 V interfacing, either select a 5 V MAX 7000 (non-A) variant or add external resistor-divider / level-shifter networks. Also confirm that VCC ramps monotonically between 0 V and 3.3 V at power-up; a slow or bouncing supply rail can put the device into an indeterminate state and cause POR-related macrocell glitches on the first clock cycle.
Compliance Information
RoHS compliance per Altera/Intel product page. Halogen-free status not explicitly disclosed in the datasheet excerpts; AEC-Q100 not applicable as this is a commercial-grade CPLD.
