EPM3256ATC144-7 - MAX 3000A 256-Macro CPLD, 7.5ns TQFP-144 | Altera
N.º da peça: EPM3256ATC144-7 ✗ Fim de vida| Qtd. | Preço unitário | 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 Visão geral
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.
Alternativas drop-in para EPM3256ATC144-7 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com EPM3256ATC144-7 (mesmo formato e footprint) — diferindo em Package, Operating Temperature, RoHS Status, Propagation Delay (tPD), Usable Gates.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
EPM3256ATC144-10N
✅ Drop-In✓ Em estoque
$14.5 / unidade
Ver ficha técnica →EPM3256ATC144-10AA
✅ Drop-In✓ Em estoque
$11.6 / unidade
Ver ficha técnica →EPM3256ATC144-10
✅ Drop-In✓ Em estoque
$9.75 / unidade
Ver ficha técnica →EPM3256AQC208-7N
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$19.95 / unidade
Ver ficha técnica →EPM3256AFC256-7
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$12.1 / unidade
Ver ficha técnica →EPM3256ATC144-7 Classificações máximas e características elétricas
| 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 |
| Encapsulamento | TQFP-144 (LFQFP, gull-wing) |
| Temperatura de operação | 0C to +70C (Commercial) |
| Contagem de pinos | 144 |
| Tipo de montagem | Surface Mount |
| PCI Compliance | PCI Local Bus Specification Revision 2.2 (speed grades -4 to -10) |
| JTAG Support | IEEE Std. 1149.1 boundary-scan |
Configuração de pinos do EPM3256ATC144-7
| Pino 1 | I/O — User I/O pin (function depends on user design) |
| Pino 2 | I/O — User I/O pin |
| Pino 3 | I/O — User I/O pin |
| Pino 4 | I/O — User I/O pin |
| Pino 5 | I/O — User I/O pin |
| Pino 6 | I/O — User I/O pin |
| Pino 7 | GND — Ground |
| Pino 8 | I/O — User I/O pin |
| Pino 9 | I/O — User I/O pin |
| Pino 10 | I/O — User I/O pin |
| Pino 11 | I/O — User I/O pin |
| Pino 12 | I/O — User I/O pin |
| Pino 13 | I/O — User I/O pin |
| Pino 14 | I/O — User I/O pin |
| Pino 15 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| Pino 16 | I/O — User I/O pin |
| Pino 17 | I/O — User I/O pin |
| Pino 18 | I/O — User I/O pin |
| Pino 19 | I/O — User I/O pin |
| Pino 20 | I/O — User I/O pin |
| Pino 21 | I/O — User I/O pin |
| Pino 22 | GND — Ground |
| Pino 23 | I/O — User I/O pin |
| Pino 24 | I/O — User I/O pin |
| Pino 25 | I/O — User I/O pin |
| Pino 26 | I/O — User I/O pin |
| Pino 27 | I/O — User I/O pin |
| Pino 28 | I/O — User I/O pin |
| Pino 29 | I/O — User I/O pin |
| Pino 30 | GND — Ground |
| Pino 31 | I/O — User I/O pin |
| Pino 32 | I/O — User I/O pin |
| Pino 33 | I/O — User I/O pin |
| Pino 34 | I/O — User I/O pin |
| Pino 35 | I/O — User I/O pin |
| Pino 36 | I/O — User I/O pin |
| Pino 37 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| Pino 38 | I/O — User I/O pin |
| Pino 39 | I/O — User I/O pin |
| Pino 40 | I/O — User I/O pin |
| Pino 41 | I/O — User I/O pin |
| Pino 42 | I/O — User I/O pin |
| Pino 43 | I/O — User I/O pin |
| Pino 44 | GND — Ground |
| Pino 45 | I/O — User I/O pin |
| Pino 46 | I/O — User I/O pin |
| Pino 47 | I/O — User I/O pin |
| Pino 48 | I/O — User I/O pin |
| Pino 49 | I/O — User I/O pin |
| Pino 50 | I/O — User I/O pin |
| Pino 51 | I/O — User I/O pin |
| Pino 52 | GND — Ground |
| Pino 53 | I/O — User I/O pin |
| Pino 54 | I/O — User I/O pin |
| Pino 55 | I/O — User I/O pin |
| Pino 56 | I/O — User I/O pin |
| Pino 57 | I/O — User I/O pin |
| Pino 58 | I/O — User I/O pin |
| Pino 59 | I/O — User I/O pin |
| Pino 60 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| Pino 61 | I/O — User I/O pin |
| Pino 62 | I/O — User I/O pin |
| Pino 63 | I/O — User I/O pin |
| Pino 64 | I/O — User I/O pin |
| Pino 65 | I/O — User I/O pin |
| Pino 66 | I/O — User I/O pin |
| Pino 67 | GND — Ground |
| Pino 68 | I/O — User I/O pin |
| Pino 69 | I/O — User I/O pin |
| Pino 70 | I/O — User I/O pin |
| Pino 71 | I/O — User I/O pin |
| Pino 72 | I/O — User I/O pin |
| Pino 73 | I/O — User I/O pin |
| Pino 74 | I/O — User I/O pin |
| Pino 75 | GND — Ground |
| Pino 76 | I/O — User I/O pin |
| Pino 77 | I/O — User I/O pin |
| Pino 78 | I/O — User I/O pin |
| Pino 79 | I/O — User I/O pin |
| Pino 80 | I/O — User I/O pin |
| Pino 81 | I/O — User I/O pin |
| Pino 82 | VCCINT — Core supply voltage (3.3 V) |
| Pino 83 | I/O — User I/O pin |
| Pino 84 | I/O — User I/O pin |
| Pino 85 | I/O — User I/O pin |
| Pino 86 | I/O — User I/O pin |
| Pino 87 | I/O — User I/O pin |
| Pino 88 | I/O — User I/O pin |
| Pino 89 | GND — Ground |
| Pino 90 | I/O — User I/O pin |
| Pino 91 | I/O — User I/O pin |
| Pino 92 | I/O — User I/O pin |
| Pino 93 | I/O — User I/O pin |
| Pino 94 | I/O — User I/O pin |
| Pino 95 | I/O — User I/O pin |
| Pino 96 | I/O — User I/O pin |
| Pino 97 | GND — Ground |
| Pino 98 | I/O — User I/O pin |
| Pino 99 | I/O — User I/O pin |
| Pino 100 | I/O — User I/O pin |
| Pino 101 | I/O — User I/O pin |
| Pino 102 | I/O — User I/O pin |
| Pino 103 | I/O — User I/O pin |
| Pino 104 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| Pino 105 | I/O — User I/O pin |
| Pino 106 | I/O — User I/O pin |
| Pino 107 | I/O — User I/O pin |
| Pino 108 | I/O — User I/O pin |
| Pino 109 | I/O — User I/O pin |
| Pino 110 | I/O — User I/O pin |
| Pino 111 | GND — Ground |
| Pino 112 | I/O — User I/O pin |
| Pino 113 | TDI — JTAG Test Data In (IEEE 1149.1) |
| Pino 114 | TMS — JTAG Test Mode Select (IEEE 1149.1) |
| Pino 115 | TCK — JTAG Test Clock (IEEE 1149.1) |
| Pino 116 | I/O — User I/O pin |
| Pino 117 | I/O — User I/O pin |
| Pino 118 | I/O — User I/O pin |
| Pino 119 | I/O — User I/O pin |
| Pino 120 | GND — Ground |
| Pino 121 | I/O — User I/O pin |
| Pino 122 | I/O — User I/O pin |
| Pino 123 | I/O — User I/O pin |
| Pino 124 | I/O — User I/O pin |
| Pino 125 | I/O — User I/O pin |
| Pino 126 | I/O — User I/O pin |
| Pino 127 | VCCIO — I/O supply voltage (2.5/3.3/5.0 V) |
| Pino 128 | I/O — User I/O pin |
| Pino 129 | I/O — User I/O pin |
| Pino 130 | I/O — User I/O pin |
| Pino 131 | I/O — User I/O pin |
| Pino 132 | I/O — User I/O pin |
| Pino 133 | I/O — User I/O pin |
| Pino 134 | GND — Ground |
| Pino 135 | I/O — User I/O pin |
| Pino 136 | I/O — User I/O pin |
| Pino 137 | I/O — User I/O pin |
| Pino 138 | I/O — User I/O pin |
| Pino 139 | I/O — User I/O pin |
| Pino 140 | I/O — User I/O pin |
| Pino 141 | I/O — User I/O pin |
| Pino 142 | TDO — JTAG Test Data Out (IEEE 1149.1) |
| Pino 143 | I/O — User I/O pin |
| Pino 144 | I/O — User I/O pin |
Aplicações típicas
EPM3256ATC144-7 é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para EPM3256ATC144-7 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- 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)
Notas de projeto
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.
Informações de conformidade
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.
