EPM3256ATC144-7 - MAX 3000A 256-Macro CPLD, 7.5ns TQFP-144 | Altera
MPN: EPM3256ATC144-7 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $28.43 | $28.43 |
| 10 | $25.59 | $255.90 |
| 100 | $22.74 | $2,274.00 |
| 500 | $19.9 | $9,950.00 |
| 1,000 | $17.06 | $17,060.00 |
Drop-in alternatives for EPM3256ATC144-7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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View Datasheet →EPM3256ATC144-7 Maximum Ratings & Electrical Characteristics
| Family | MAX 3000A |
| Macrocells | 256 |
| User I/Os | 116 |
| Logic Elements / Gates | 600 to 10,000 usable gates |
| Propagation Delay (tPD) | 7.5 ns |
| Counter Frequency (fCNT) | 227.3 MHz |
| Speed Grade | -7 |
| Supply Voltage - Core (VCCINT) | 3.3 V |
| Supply Voltage - I/O (VCCIO) | 2.5 V / 3.3 V / 5.0 V |
| In-System Programming | IEEE Std. 1532 compliant, 3.3 V ISP |
| Package | TQFP-144 (LFQFP, gull-wing) |
| Operating Temperature | 0C to +70C (Commercial) |
| Pin Count | 144 |
| Mounting Type | Surface Mount |
| PCI Compliance | PCI Local Bus Specification Revision 2.2 (speed grades -4 to -10) |
| JTAG Support | IEEE Std. 1149.1 boundary-scan |
EPM3256ATC144-7 Pin Configuration
| Pin 1 | I/O — User I/O pin (function depends on user design) |
| 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 | GND — Ground |
| Pin 8 | I/O — User I/O pin |
| Pin 9 | I/O — User I/O pin |
| Pin 10 | I/O — User I/O pin |
| Pin 11 | I/O — User I/O pin |
| 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 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| 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 | GND — Ground |
| Pin 23 | I/O — User I/O pin |
| 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 | GND — Ground |
| 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 | I/O — User I/O pin |
| Pin 35 | I/O — User I/O pin |
| Pin 36 | I/O — User I/O pin |
| Pin 37 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| 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 | GND — Ground |
| 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 | I/O — User I/O pin |
| Pin 50 | I/O — User I/O pin |
| Pin 51 | I/O — User I/O pin |
| Pin 52 | GND — Ground |
| 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 | I/O — User I/O pin |
| Pin 60 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| Pin 61 | I/O — User I/O pin |
| Pin 62 | I/O — User I/O pin |
| 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 | GND — Ground |
| 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 | I/O — User I/O pin |
| Pin 74 | I/O — User I/O pin |
| Pin 75 | GND — Ground |
| 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 | VCCINT — Core supply voltage (3.3 V) |
| Pin 83 | I/O — User I/O pin |
| Pin 84 | I/O — User I/O pin |
| Pin 85 | I/O — User I/O pin |
| Pin 86 | I/O — User I/O pin |
| Pin 87 | I/O — User I/O pin |
| Pin 88 | I/O — User I/O pin |
| Pin 89 | GND — Ground |
| 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 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| 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 | I/O — User I/O pin |
| Pin 110 | I/O — User I/O pin |
| Pin 111 | GND — Ground |
| Pin 112 | I/O — User I/O pin |
| Pin 113 | TDI — JTAG Test Data In (IEEE 1149.1) |
| Pin 114 | TMS — JTAG Test Mode Select (IEEE 1149.1) |
| Pin 115 | TCK — JTAG Test Clock (IEEE 1149.1) |
| 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 | GND — Ground |
| Pin 121 | I/O — User I/O pin |
| 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 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| 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 | I/O — User I/O pin |
| Pin 133 | I/O — User I/O pin |
| Pin 134 | GND — Ground |
| Pin 135 | I/O — User I/O pin |
| Pin 136 | I/O — User I/O pin |
| Pin 137 | I/O — User I/O pin |
| Pin 138 | I/O — User I/O pin |
| Pin 139 | I/O — User I/O pin |
| Pin 140 | I/O — User I/O pin |
| Pin 141 | I/O — User I/O pin |
| Pin 142 | TDO — JTAG Test Data Out (IEEE 1149.1) |
| Pin 143 | I/O — User I/O pin |
| 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
EPM3256ATC144-7 is suitable for 6 applications: PCI Bus Interface Glue Logic, Address Decoding and Chip-Select Generation, State-Machine and Control Logic, Peripheral I/O Expansion and Bus Bridging, Legacy System Maintenance and Field Upgrades, Test and Measurement Front-End Logic.
PCI Bus Interface Glue Logic
The EPM3256ATC144-7's 7.5 ns pin-to-pin delay and PCI SIG Revision 2.2 compliance make it well suited for 33/66 MHz PCI Local Bus target interfaces, address decoding, and command-handling glue logic. The 116 user I/Os easily accommodate the 32-bit multiplexed PCI AD/C/BE parity bus plus side-band signals (FRAME, IRDY, TRDY, DEVSEL, STOP, IDSEL, PAR, PERR, SERR, REQ, GNT) plus auxiliary system controls. Place the CPLD adjacent to the PCI connector to minimize stub length, and use VCCIO at 3.3 V for PCI 3.3 V signaling. The 256 macrocells provide headroom for address decoding, bus arbitration, and configuration-space read/write state machines on a single chip.
Recommended
Address Decoding and Chip-Select Generation
With 256 macrocells and 116 user I/Os, the EPM3256ATC144-7 is ideal for replacing multiple 74LS138/74HC138 decoder trees and discrete glue logic in microprocessor systems. A single device can generate dozens of chip-select, read/write strobe, and bank-switch signals for memory and peripheral address maps, with the JTAG interface (IEEE 1149.1) supporting board-level boundary-scan test. The 3.3 V VCCINT and selectable 2.5/3.3/5.0 V VCCIO allow direct interfacing with 5 V EPROMs, 3.3 V microcontrollers, and 2.5 V DSPs on the same board without external level shifters.
Recommended
State-Machine and Control Logic
The MAX 3000A architecture with 7.5 ns tPD and 227.3 MHz counter frequency supports fast deterministic state machines for industrial control, motor control, and instrumentation front-ends. The non-volatile EEPROM configuration cells mean the device powers up instantly with a defined state, eliminating the FPGA-style configuration wait time. With 116 user I/Os and 256 macrocells, a single EPM3256ATC144-7 can implement multiple independent state machines plus combinational glue, replacing several PAL/GAL devices. In-system programmability via IEEE 1532 enables field firmware updates without removing the board.
Recommended
Peripheral I/O Expansion and Bus Bridging
The 116 user I/Os and 256 macrocells make the EPM3256ATC144-7 well suited for bridging between processors and peripherals of mismatched bus widths or voltage levels. For example, it can implement a 16-bit microcontroller external bus interface to a 32-bit peripheral, or translate 5 V peripheral signals to 3.3 V processor logic. The multi-voltage VCCIO support (2.5/3.3/5.0 V) eliminates external level shifters, reducing BOM cost and board area. The 7.5 ns delay adds minimal latency to bus transactions, suitable for real-time control interfaces.
Recommended
Legacy System Maintenance and Field Upgrades
Because the EPM3256ATC144-7 supports 3.3 V IEEE 1532 in-system programming, it is ideal for legacy systems requiring field firmware upgrades via JTAG. Manufacturing change orders, bug fixes, and feature additions can be applied without removing the device from the board. The EEPROM-based configuration is non-volatile, so the device powers up in the updated state without external boot memory. The 116 user I/Os provide spare capacity for added functionality without requiring hardware changes, extending the service life of installed equipment.
Recommended
Test and Measurement Front-End Logic
The deterministic 7.5 ns propagation delay and 116 user I/Os suit the EPM3256ATC144-7 for test-and-measurement front-end applications such as digitizer trigger logic, pattern generators, and protocol analyzers. Its 3.3 V core and multi-voltage I/O allow direct connection to high-speed ADCs, DACs, and comparators. The non-volatile instant-on behavior ensures the instrument is operational within microseconds of power-up, critical for handheld and benchtop equipment. With PCI compliance, the CPLD can also serve as a PCI-to-instrument bridge, simplifying host-side driver development.
Recommended
Recommended Products Summary
Engineering reference data for EPM3256ATC144-7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPM3256ATC144-10N | EPM3256ATC144-10AA | EPM3256ATC144-10 | EPM3256AQC208-7N | EPM3256AFC256-7 |
|---|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera | Altera |
| Package | TQFP-144 | TQFP-144 (same) | TQFP-144 (same) | TQFP-144 (same) | PQFP-208 (different) | BGA-256 (different) |
| Macrocells | 256 | 256 | 256 | 256 | 256 | 256 |
| User I/Os | 116 | 116 | 116 | 116 | 164 (more I/Os) | 161 (more I/Os) |
| Speed Grade (tPD) | -7 (7.5 ns) | -10 (10 ns) | -10 (10 ns) | -10 (10 ns) | -7 (7.5 ns) | -7 (7.5 ns) |
| Core Voltage (VCCINT) | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Operating Temperature | 0C to +70C (Commercial) | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C |
| In-System Programming | IEEE 1532, 3.3 V ISP | IEEE 1532, 3.3 V ISP | IEEE 1532, 3.3 V ISP | IEEE 1532, 3.3 V ISP | IEEE 1532, 3.3 V ISP | IEEE 1532, 3.3 V ISP |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Fastest 7.5 ns speed grade in the 144-TQFP MAX 3000A family (vs EPM3256ATC144-10N)
- 256 macrocells with 116 user I/Os in compact TQFP-144 (vs EPM3128ATC144-7)
- PCI SIG 2.2 compliant at multiple speed grades (vs Lattice ispMACH 4000 LC4256C)
Design Notes
Estimated: at 100% toggle rate across all 116 I/Os at 100 MHz with 20 pF loads, total dynamic power is approximately (1/2) x C x V^2 x f x N = (1/2) x 20e-12 x 3.3^2 x 1e8 x 116 = 0.13 W. At 50% toggle and 50 MHz, power drops to ~32 mW. Provide a 3.3 V regulator with at least 200 mA capacity and place 0.1 uF X7R ceramic decoupling within 3 mm of every VCCINT and VCCIO pin. Bulk 10 uF tantalum or ceramic on each supply rail is recommended for ISP-induced transients.
TQFP-144 packages have 0.5 mm pitch leads. Use 0.15 mm wide solder paste stencils and ENIG or OSP surface finish for reliable reflow. Route JTAG signals (TMS, TCK, TDI, TDO) in a dedicated chain away from high-speed switching signals. Place the device on a ground plane stitched with vias on a 5 mm grid for thermal dissipation and signal integrity. Keep all 116 user I/O traces short and matched within 25 mm where timing matters.
Do not confuse VCCINT (3.3 V core, mandatory) with VCCIO (multi-voltage I/O). Connecting VCCIO to 5 V while leaving VCCINT at 3.3 V is valid, but mixing them up will destroy the device. When migrating from a -10 speed grade design to -7, re-verify timing closure because macrocell timing paths change. Note that the part is obsolete - design with a second-source strategy from day one and validate long-term availability before committing to production.
For PCI 33 MHz or 66 MHz operation, maintain trace impedance of 65 ohms +/- 10% on the PCI bus segments and keep stub lengths under 25 mm. Use series damping resistors (22-33 ohm) on heavily loaded PCI signals to control ringing. Because the EPM3256ATC144-7 is rated PCI SIG 2.2 compliant, AC timing is guaranteed only when the recommended reference design layout is followed; deviations require full re-characterization.
Compliance Information
RoHS, REACH, and conflict-mineral compliance information was not present in the verified web data and should be confirmed with Intel (Altera) for current production. Lead-free is presumed from the TQFP package style. AEC-Q100 is not applicable since this is a commercial-grade (0C to +70C) part; industrial and automotive grades exist with -I suffix variants.
