EPM3256ATC144-7 - MAX 3000A 256-Macro CPLD, 7.5ns TQFP-144 | Altera
Référence : EPM3256ATC144-7 ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 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 |
EPM3256ATC144-7 Présentation
A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic device that combines multiple PAL/GAL-like logic blocks with a programmable interconnect matrix on a single chip. In the broader taxonomy, the CPLD sits below the FPGA (Field-Programmable Gate Array) in complexity but above discrete 74-series glue logic in integration density; the MAX 3000A family is Altera's entry-level CPLD line based on the company's classic MAX architecture using EEPROM configuration cells.
Key features include 256 macrocells, 116 user I/Os, 7.5 ns pin-to-pin delay (speed grade -7), 3.3-V in-system programmability (ISP) compliant with the IEEE Std. 1532 specification, and counter frequencies up to 227.3 MHz. The device operates from a single 3.3 V core supply and supports 2.5 V, 3.3 V, or 5.0 V I/O levels through dedicated VCCINT and VCCIO pins. PCI SIG compliance is met at the -4 through -10 speed grades, making the EPM3256ATC144-7 usable in PCI Local Bus Revision 2.2 designs.
Typical applications include bus-interface glue logic, address decoding, state-machine control, peripheral I/O expansion, and PCI bus target/bridge designs. The high I/O count (116) makes it well suited for replacing multiple discrete 74LS/74HC packages with a single programmable device, while the 7.5 ns delay enables interfacing with 66 MHz PCI and similar high-speed control buses.
When designing with this part, plan the JTAG chain (IEEE 1149.1) early and reserve the four JTAG pins (TMS, TCK, TDI, TDO plus optional TRST). Ensure VCCINT and VCCIO decoupling uses 0.1 uF ceramic capacitors placed within 3 mm of each supply pin to suppress ISP-induced transients.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour EPM3256ATC144-7 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec EPM3256ATC144-7 (même facteur de forme et même empreinte) — différant par Package, Operating Temperature, RoHS Status, Propagation Delay (tPD), Usable Gates.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
EPM3256ATC144-10N
✅ Remplacement direct✓ En stock
$14.5 / unité
Voir la fiche technique →EPM3256ATC144-10AA
✅ Remplacement direct✓ En stock
$11.6 / unité
Voir la fiche technique →EPM3256ATC144-10
✅ Remplacement direct✓ En stock
$9.75 / unité
Voir la fiche technique →EPM3256AQC208-7N
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$19.95 / unité
Voir la fiche technique →EPM3256AFC256-7
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$12.1 / unité
Voir la fiche technique →EPM3256ATC144-7 Valeurs maximales et caractéristiques électriques
| 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 |
| Boîtier | TQFP-144 (LFQFP, gull-wing) |
| Température de fonctionnement | 0C to +70C (Commercial) |
| Nombre de broches | 144 |
| Type de montage | Surface Mount |
| PCI Compliance | PCI Local Bus Specification Revision 2.2 (speed grades -4 to -10) |
| JTAG Support | IEEE Std. 1149.1 boundary-scan |
Configuration des broches de EPM3256ATC144-7
| Broche 1 | I/O — User I/O pin (function depends on user design) |
| Broche 2 | I/O — User I/O pin |
| Broche 3 | I/O — User I/O pin |
| Broche 4 | I/O — User I/O pin |
| Broche 5 | I/O — User I/O pin |
| Broche 6 | I/O — User I/O pin |
| Broche 7 | GND — Ground |
| Broche 8 | I/O — User I/O pin |
| Broche 9 | I/O — User I/O pin |
| Broche 10 | I/O — User I/O pin |
| Broche 11 | I/O — User I/O pin |
| Broche 12 | I/O — User I/O pin |
| Broche 13 | I/O — User I/O pin |
| Broche 14 | I/O — User I/O pin |
| Broche 15 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| Broche 16 | I/O — User I/O pin |
| Broche 17 | I/O — User I/O pin |
| Broche 18 | I/O — User I/O pin |
| Broche 19 | I/O — User I/O pin |
| Broche 20 | I/O — User I/O pin |
| Broche 21 | I/O — User I/O pin |
| Broche 22 | GND — Ground |
| Broche 23 | I/O — User I/O pin |
| Broche 24 | I/O — User I/O pin |
| Broche 25 | I/O — User I/O pin |
| Broche 26 | I/O — User I/O pin |
| Broche 27 | I/O — User I/O pin |
| Broche 28 | I/O — User I/O pin |
| Broche 29 | I/O — User I/O pin |
| Broche 30 | GND — Ground |
| Broche 31 | I/O — User I/O pin |
| Broche 32 | I/O — User I/O pin |
| Broche 33 | I/O — User I/O pin |
| Broche 34 | I/O — User I/O pin |
| Broche 35 | I/O — User I/O pin |
| Broche 36 | I/O — User I/O pin |
| Broche 37 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| Broche 38 | I/O — User I/O pin |
| Broche 39 | I/O — User I/O pin |
| Broche 40 | I/O — User I/O pin |
| Broche 41 | I/O — User I/O pin |
| Broche 42 | I/O — User I/O pin |
| Broche 43 | I/O — User I/O pin |
| Broche 44 | GND — Ground |
| Broche 45 | I/O — User I/O pin |
| Broche 46 | I/O — User I/O pin |
| Broche 47 | I/O — User I/O pin |
| Broche 48 | I/O — User I/O pin |
| Broche 49 | I/O — User I/O pin |
| Broche 50 | I/O — User I/O pin |
| Broche 51 | I/O — User I/O pin |
| Broche 52 | GND — Ground |
| Broche 53 | I/O — User I/O pin |
| Broche 54 | I/O — User I/O pin |
| Broche 55 | I/O — User I/O pin |
| Broche 56 | I/O — User I/O pin |
| Broche 57 | I/O — User I/O pin |
| Broche 58 | I/O — User I/O pin |
| Broche 59 | I/O — User I/O pin |
| Broche 60 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| Broche 61 | I/O — User I/O pin |
| Broche 62 | I/O — User I/O pin |
| Broche 63 | I/O — User I/O pin |
| Broche 64 | I/O — User I/O pin |
| Broche 65 | I/O — User I/O pin |
| Broche 66 | I/O — User I/O pin |
| Broche 67 | GND — Ground |
| Broche 68 | I/O — User I/O pin |
| Broche 69 | I/O — User I/O pin |
| Broche 70 | I/O — User I/O pin |
| Broche 71 | I/O — User I/O pin |
| Broche 72 | I/O — User I/O pin |
| Broche 73 | I/O — User I/O pin |
| Broche 74 | I/O — User I/O pin |
| Broche 75 | GND — Ground |
| Broche 76 | I/O — User I/O pin |
| Broche 77 | I/O — User I/O pin |
| Broche 78 | I/O — User I/O pin |
| Broche 79 | I/O — User I/O pin |
| Broche 80 | I/O — User I/O pin |
| Broche 81 | I/O — User I/O pin |
| Broche 82 | VCCINT — Core supply voltage (3.3 V) |
| Broche 83 | I/O — User I/O pin |
| Broche 84 | I/O — User I/O pin |
| Broche 85 | I/O — User I/O pin |
| Broche 86 | I/O — User I/O pin |
| Broche 87 | I/O — User I/O pin |
| Broche 88 | I/O — User I/O pin |
| Broche 89 | GND — Ground |
| Broche 90 | I/O — User I/O pin |
| Broche 91 | I/O — User I/O pin |
| Broche 92 | I/O — User I/O pin |
| Broche 93 | I/O — User I/O pin |
| Broche 94 | I/O — User I/O pin |
| Broche 95 | I/O — User I/O pin |
| Broche 96 | I/O — User I/O pin |
| Broche 97 | GND — Ground |
| Broche 98 | I/O — User I/O pin |
| Broche 99 | I/O — User I/O pin |
| Broche 100 | I/O — User I/O pin |
| Broche 101 | I/O — User I/O pin |
| Broche 102 | I/O — User I/O pin |
| Broche 103 | I/O — User I/O pin |
| Broche 104 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| Broche 105 | I/O — User I/O pin |
| Broche 106 | I/O — User I/O pin |
| Broche 107 | I/O — User I/O pin |
| Broche 108 | I/O — User I/O pin |
| Broche 109 | I/O — User I/O pin |
| Broche 110 | I/O — User I/O pin |
| Broche 111 | GND — Ground |
| Broche 112 | I/O — User I/O pin |
| Broche 113 | TDI — JTAG Test Data In (IEEE 1149.1) |
| Broche 114 | TMS — JTAG Test Mode Select (IEEE 1149.1) |
| Broche 115 | TCK — JTAG Test Clock (IEEE 1149.1) |
| Broche 116 | I/O — User I/O pin |
| Broche 117 | I/O — User I/O pin |
| Broche 118 | I/O — User I/O pin |
| Broche 119 | I/O — User I/O pin |
| Broche 120 | GND — Ground |
| Broche 121 | I/O — User I/O pin |
| Broche 122 | I/O — User I/O pin |
| Broche 123 | I/O — User I/O pin |
| Broche 124 | I/O — User I/O pin |
| Broche 125 | I/O — User I/O pin |
| Broche 126 | I/O — User I/O pin |
| Broche 127 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| Broche 128 | I/O — User I/O pin |
| Broche 129 | I/O — User I/O pin |
| Broche 130 | I/O — User I/O pin |
| Broche 131 | I/O — User I/O pin |
| Broche 132 | I/O — User I/O pin |
| Broche 133 | I/O — User I/O pin |
| Broche 134 | GND — Ground |
| Broche 135 | I/O — User I/O pin |
| Broche 136 | I/O — User I/O pin |
| Broche 137 | I/O — User I/O pin |
| Broche 138 | I/O — User I/O pin |
| Broche 139 | I/O — User I/O pin |
| Broche 140 | I/O — User I/O pin |
| Broche 141 | I/O — User I/O pin |
| Broche 142 | TDO — JTAG Test Data Out (IEEE 1149.1) |
| Broche 143 | I/O — User I/O pin |
| Broche 144 | I/O — User I/O pin |
Applications typiques
EPM3256ATC144-7 convient pour 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour EPM3256ATC144-7 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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)
Notes de conception
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.
Informations de conformité
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.
