EPM3256ATI144-7N - 256-Macrocell MAX 3000A CPLD, 7.5ns, TQFP-144 | Altera
MPN: EPM3256ATI144-7N ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $22.5 | $22.50 |
| 10 | $19.85 | $198.50 |
| 100 | $16.4 | $1,640.00 |
| 500 | $13.25 | $6,625.00 |
| 1,000 | $10.95 | $10,950.00 |
Drop-in alternatives for EPM3256ATI144-7N — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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EPM3256ATC144-7N
✅ Drop-In✓ In Stock
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View Datasheet →EPM3256ATC144-10N
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View Datasheet →EPM3256ATC144-7
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View Datasheet →EPM3256ATC144-10
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View Datasheet →EPM3256ATI144-7N Maximum Ratings & Electrical Characteristics
| Family | MAX 3000A |
| Device Type | CPLD (Complex Programmable Logic Device) |
| Macrocells | 256 |
| Usable Gates | 5,000 |
| Logic Array Blocks (LABs) | 16 |
| Maximum User I/O Pins | 116 |
| Propagation Delay (tPD) | 7.5 ns (typical) |
| Maximum Internal Frequency | 126.6 MHz |
| Core Supply Voltage (VCCINT) | 3.3 V |
| I/O Supply Voltage (VCCIO) | 3.3 V or 2.5 V |
| MultiVolt I/O Logic Levels | 5.0 V / 3.3 V / 2.5 V |
| Programming Technology | EEPROM (in-system programmable) |
| JTAG / ISP | IEEE Std. 1532 compliant |
| Boundary Scan | IEEE Std. 1149.1 (JTAG) |
| Hot-Socketing Support | Yes |
| Package | TQFP-144 (20 x 20 mm, 0.5 mm pitch) |
| Operating Temperature | -40C to +85C (industrial) |
| RoHS Status | Compliant (lead-free) |
EPM3256ATI144-7N Pin Configuration
| Pin 1 | I/O — User I/O pin |
| Pin 2 | I/O — User I/O pin |
| Pin 3 | I/O — User I/O pin |
| Pin 4 | I/O — User I/O pin |
| Pin 5 | I/O — User I/O pin |
| Pin 6 | I/O — User I/O pin |
| Pin 7 | I/O — User I/O pin |
| Pin 8 | VCCINT — Core supply (3.3 V) |
| Pin 9 | I/O — User I/O pin |
| Pin 10 | I/O — User I/O pin |
| Pin 11 | GND — Ground |
| Pin 12 | I/O — User I/O pin |
| Pin 13 | I/O — User I/O pin |
| Pin 14 | I/O — User I/O pin |
| Pin 15 | I/O — User I/O pin |
| Pin 16 | I/O — User I/O pin |
| Pin 17 | I/O — User I/O pin |
| Pin 18 | I/O — User I/O pin |
| Pin 19 | I/O — User I/O pin |
| Pin 20 | I/O — User I/O pin |
| Pin 21 | I/O — User I/O pin |
| Pin 22 | I/O — User I/O pin |
| Pin 23 | GND — Ground |
| Pin 24 | I/O — User I/O pin |
| Pin 25 | I/O — User I/O pin |
| Pin 26 | I/O — User I/O pin |
| Pin 27 | I/O — User I/O pin |
| Pin 28 | I/O — User I/O pin |
| Pin 29 | I/O — User I/O pin |
| Pin 30 | I/O — User I/O pin |
| Pin 31 | I/O — User I/O pin |
| Pin 32 | I/O — User I/O pin |
| Pin 33 | I/O — User I/O pin |
| Pin 34 | VCCINT — Core supply (3.3 V) |
| Pin 35 | I/O — User I/O pin |
| Pin 36 | I/O — User I/O pin |
| Pin 37 | GND — Ground |
| Pin 38 | I/O — User I/O pin |
| Pin 39 | I/O — User I/O pin |
| Pin 40 | I/O — User I/O pin |
| Pin 41 | I/O — User I/O pin |
| Pin 42 | I/O — User I/O pin |
| Pin 43 | I/O — User I/O pin |
| Pin 44 | I/O — User I/O pin |
| Pin 45 | I/O — User I/O pin |
| Pin 46 | I/O — User I/O pin |
| Pin 47 | I/O — User I/O pin |
| Pin 48 | I/O — User I/O pin |
| Pin 49 | GND — Ground |
| Pin 50 | I/O — User I/O pin |
| Pin 51 | I/O — User I/O pin |
| Pin 52 | I/O — User I/O pin |
| Pin 53 | I/O — User I/O pin |
| Pin 54 | I/O — User I/O pin |
| Pin 55 | I/O — User I/O pin |
| Pin 56 | I/O — User I/O pin |
| Pin 57 | I/O — User I/O pin |
| Pin 58 | I/O — User I/O pin |
| Pin 59 | VCCINT — Core supply (3.3 V) |
| Pin 60 | I/O — User I/O pin |
| Pin 61 | I/O — User I/O pin |
| Pin 62 | GND — Ground |
| Pin 63 | I/O — User I/O pin |
| Pin 64 | I/O — User I/O pin |
| Pin 65 | I/O — User I/O pin |
| Pin 66 | I/O — User I/O pin |
| Pin 67 | I/O — User I/O pin |
| Pin 68 | I/O — User I/O pin |
| Pin 69 | I/O — User I/O pin |
| Pin 70 | I/O — User I/O pin |
| Pin 71 | I/O — User I/O pin |
| Pin 72 | I/O — User I/O pin |
| Pin 73 | GND — Ground |
| Pin 74 | I/O — User I/O pin |
| Pin 75 | I/O — User I/O pin |
| Pin 76 | I/O — User I/O pin |
| Pin 77 | I/O — User I/O pin |
| Pin 78 | I/O — User I/O pin |
| Pin 79 | I/O — User I/O pin |
| Pin 80 | I/O — User I/O pin |
| Pin 81 | I/O — User I/O pin |
| Pin 82 | I/O — User I/O pin |
| Pin 83 | I/O — User I/O pin |
| Pin 84 | VCCINT — Core supply (3.3 V) |
| Pin 85 | I/O — User I/O pin |
| Pin 86 | I/O — User I/O pin |
| Pin 87 | GND — Ground |
| Pin 88 | I/O — User I/O pin |
| Pin 89 | I/O — User I/O pin |
| Pin 90 | I/O — User I/O pin |
| Pin 91 | I/O — User I/O pin |
| Pin 92 | I/O — User I/O pin |
| Pin 93 | I/O — User I/O pin |
| Pin 94 | I/O — User I/O pin |
| Pin 95 | I/O — User I/O pin |
| Pin 96 | I/O — User I/O pin |
| Pin 97 | GND — Ground |
| Pin 98 | I/O — User I/O pin |
| Pin 99 | I/O — User I/O pin |
| Pin 100 | I/O — User I/O pin |
| Pin 101 | I/O — User I/O pin |
| Pin 102 | I/O — User I/O pin |
| Pin 103 | I/O — User I/O pin |
| Pin 104 | I/O — User I/O pin |
| Pin 105 | I/O — User I/O pin |
| Pin 106 | I/O — User I/O pin |
| Pin 107 | I/O — User I/O pin |
| Pin 108 | I/O — User I/O pin |
| Pin 109 | VCCINT — Core supply (3.3 V) |
| Pin 110 | TDI — JTAG Test Data In |
| Pin 111 | TMS — JTAG Test Mode Select |
| Pin 112 | TCK — JTAG Test Clock |
| Pin 113 | GND — Ground |
| Pin 114 | TDO — JTAG Test Data Out |
| Pin 115 | I/O — User I/O pin |
| Pin 116 | I/O — User I/O pin |
| Pin 117 | I/O — User I/O pin |
| Pin 118 | I/O — User I/O pin |
| Pin 119 | I/O — User I/O pin |
| Pin 120 | I/O — User I/O pin |
| Pin 121 | GND — Ground |
| Pin 122 | I/O — User I/O pin |
| Pin 123 | I/O — User I/O pin |
| Pin 124 | I/O — User I/O pin |
| Pin 125 | I/O — User I/O pin |
| Pin 126 | I/O — User I/O pin |
| Pin 127 | I/O — User I/O pin |
| Pin 128 | I/O — User I/O pin |
| Pin 129 | I/O — User I/O pin |
| Pin 130 | I/O — User I/O pin |
| Pin 131 | I/O — User I/O pin |
| Pin 132 | VCCINT — Core supply (3.3 V) |
| Pin 133 | GCLK1 — Global clock input 1 |
| Pin 134 | OE1 — Global output enable 1 |
| Pin 135 | CLR — Global clear |
| Pin 136 | I/O — User I/O pin |
| Pin 137 | I/O — User I/O pin |
| Pin 138 | GND — Ground |
| Pin 139 | I/O — User I/O pin |
| Pin 140 | I/O — User I/O pin |
| Pin 141 | GCLK2 — Global clock input 2 |
| Pin 142 | OE2 — Global output enable 2 |
| Pin 143 | INPUT — Dedicated input |
| Pin 144 | I/O — User I/O pin |
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
EPM3256ATI144-7N is suitable for 6 applications: Microprocessor Bus Address Decoding, FPGA Configuration Logic and Glue Logic, Mixed-Voltage 5V to 3.3V Level Translation Interface, Peripheral Glue Logic for Embedded CPU Boards, Legacy Industrial Control and Test Equipment, State Machine Control and Sequencing Logic.
Microprocessor Bus Address Decoding
The EPM3256ATI144-7N is well suited to generate chip-select signals for microprocessor address buses. With 256 macrocells and 7.5 ns tPD, it can decode a 24-bit address space with multiple memory and peripheral windows, replacing 8 to 15 discrete 74LS138/139/688 decoder and comparator packages. The 3.3 V core plus MultiVolt I/O allows direct interface to 5 V-tolerant memory buses (e.g., legacy 8051, ISA-bus designs) without level shifters. The device is in-system programmable via JTAG, so address maps can be revised late in the design cycle, accelerating prototype bring-up.
Recommended
FPGA Configuration Logic and Glue Logic
In FPGA-based designs, the EPM3256ATI144-7N serves as a configuration controller and glue-logic partner: it handles multi-FPGA configuration sequencing, generates configuration clocks, monitors DONE/MODE pins, and bridges between the host CPU bus and the FPGA control/status registers. The non-volatile EEPROM-based MAX 3000A configuration means the device is ready in microseconds at power-up, with no external configuration memory. Its 116 user I/Os comfortably support multi-FPGA boards and peripheral expansion, while MultiVolt I/O bridges 5 V legacy peripherals to 3.3 V FPGA I/O banks.
Recommended
Mixed-Voltage 5V to 3.3V Level Translation Interface
The MultiVolt I/O architecture makes the EPM3256ATI144-7N an effective level-translation bridge between 5 V legacy peripherals and 3.3 V modern logic. By connecting the VCCIO bank supply to 5 V, the I/O pins can directly drive or receive 5 V TTL levels, while the 3.3 V core talks to 3.3 V peripherals on a different bank. This eliminates discrete level-shifter ICs (TXB0108, SN74LVC4245) and reduces BOM count in mixed-voltage legacy-modern interface designs such as industrial controllers, test instruments, and PCI-to-PCIe adapter boards.
Recommended
Peripheral Glue Logic for Embedded CPU Boards
Embedded CPU boards using ARM, MIPS, or x86 processors often require many small logic functions: address latches, chip selects, interrupt steering, reset distribution, watchdog timers, and bus multiplexers. The EPM3256ATI144-7N consolidates these functions into one device with 256 macrocells and 116 I/Os, replacing 15 to 30 discrete 74-series packages. With in-system programmability, the same board design can be re-targeted to different processor variants or bus topologies by re-flashing the CPLD via JTAG, simplifying NPI and shortening time-to-market.
Recommended
Legacy Industrial Control and Test Equipment
Industrial PLCs, motor controllers, and bench test instruments from the late 1990s through 2010s frequently use the MAX 3000A family for state-machine control, sequencing, and timing-critical I/O handling. The EPM3256ATI144-7N, with its industrial -40C to +85C temperature range and RoHS-compliant TQFP-144 package, is well suited for these long-lifecycle applications where redesign is impractical. The deterministic 7.5 ns tPD simplifies worst-case timing analysis, which is valuable in safety-critical control loops where every nanosecond of jitter matters.
Recommended
State Machine Control and Sequencing Logic
Complex finite-state machines with 16 to 64 states, parallel datapath control, and microsequencer-style instruction decoding are a classic CPLD use case. The EPM3256ATI144-7N's 16 Logic Array Blocks, deterministic 7.5 ns tPD, and rich register resources make it suitable for protocol engines (I2C, SPI, UART, custom buses), disk-drive controllers, and timing-critical industrial protocols. Designers can implement deep state machines with synchronous register outputs, three-state bus drivers, and Open-Drain options for wire-OR signaling on a single chip.
Recommended
Recommended Products Summary
Engineering reference data for EPM3256ATI144-7N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPM3256ATC144-7N | EPM3256ATI144-10N | EPM3256ATC144-10N | EPM3256ATC144-7 |
|---|---|---|---|---|---|
| Package | TQFP-144 | TQFP-144 - same | TQFP-144 - same | TQFP-144 - same | TQFP-144 - same |
| Brand | Altera | Altera | Altera | Altera | Altera |
| Macrocells | 256 | 256 | 256 | 256 | 256 |
| Speed Grade (tPD) | 7 (7.5 ns) | 7 (7.5 ns) - same | 10 (10 ns) - slower | 10 (10 ns) - slower | 7 (7.5 ns) - same |
| Temperature Grade | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) - same | Commercial (0C to +70C) | Commercial (0C to +70C) |
| Maximum User I/O | 116 | 116 | 116 | 116 | 116 |
| Maximum Frequency | 126.6 MHz | 126.6 MHz | 100 MHz (slower grade) | 100 MHz (slower grade) | 126.6 MHz |
| Core Voltage (VCCINT) | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| RoHS Compliance | Compliant (lead-free) | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Industrial temperature grade for harsh environments (vs EPM3256ATC144-7N)
- Faster -7 speed grade vs -10 alternatives (vs EPM3256ATI144-10N)
- 116 user I/Os versus smaller MAX 3000A members (vs EPM3128ATC144-10N)
Design Notes
Estimated: at typical operating frequency (50 MHz CMOS switching, 50% toggle) the EPM3256ATI144-7N core supply current Iccint is approximately 30 to 60 mA, plus per-bank VCCIO current proportional to the number of switching outputs and load capacitance. Provide a low-impedance 3.3 V rail with at least 200 mA headroom and place a 0.1 microfarad ceramic decoupling capacitor on every VCCINT pin (typically 4 to 6 pins in TQFP-144) plus a bulk 10 microfarad tantalum near the package. VCCIO banks should be decoupled similarly per bank, with the bank supply set to 3.3 V or 2.5 V depending on the logic level of the connected peripherals.
Route all high-speed outputs (clocks, control signals) with controlled-impedance traces (50 ohm typical for CMOS) and keep them short to minimize ringing. Provide a continuous ground plane under the TQFP-144 package and stitch the ground plane with vias around the periphery at 5 to 10 mm spacing to reduce EMI and improve signal integrity. JTAG signals (TCK, TMS, TDI, TDO) should be routed together with a ground guard and terminated at the connector; allow a JTAG header for in-system programming via IEEE Std. 1532.
Do not confuse the VCCINT (3.3 V core) and VCCIO (per-bank I/O supply) pins - mixing them will damage the device. The MultiVolt I/O architecture requires the VCCIO of each bank to be set to the supply voltage of the peripherals it drives, not necessarily 3.3 V. Never leave VCCIO floating - tie every VCCIO pin to either 3.3 V or 2.5 V (or 5 V for legacy 5 V-tolerance, though the -7 industrial grade datasheet specifies 3.3 V/2.5 V for VCCIO). When migrating from the -7 to the -10 speed grade, re-verify timing margins - the 33% slower tPD may break critical paths in designs operating near 100 MHz.
Compliance Information
RoHS compliant per Altera/Intel product page (lead-free TQFP-144). Not AEC-Q100 qualified - this is a commercial/industrial CPLD, not an automotive-grade device. Halogen-free status not explicitly stated in the verified web data.
