EPM3256ATC144-7N - MAX 3000A CPLD 256 Macro 7.5ns | Altera
N.º da peça: EPM3256ATC144-7N ⚠ Última compra| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $28.3 | $28,30 |
| 10 | $25.45 | $254,50 |
| 100 | $22.1 | $2.210,00 |
| 500 | $19.85 | $9.925,00 |
| 1.000 | $17.2 | $17.200,00 |
EPM3256ATC144-7N Visão geral
A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic device that combines multiple PAL-like macro cell arrays on a single chip with a programmable interconnect matrix. Within the broader taxonomy, a CPLD sits between simple SPLDs/GALs and FPGAs: it provides predictable timing, instant-on non-volatile configuration (EEPROM-based for MAX 3000A), and deterministic I/O pin-to-pin delays. CPLDs are commonly used as glue logic, bus bridges, interface translators, and state-machine controllers where low latency and instant boot behavior matter more than raw LUT density.
Key features of the EPM3256ATC144-7N include a 5K gate-equivalent fabric with 16 logic array blocks (LABs), 256 macro cells each containing a programmable AND/OR array with a configurable register, and JTAG-compliant IEEE 1149.1 boundary-scan support. The device provides programmable power reduction per macro cell and a 4-pin JTAG interface for in-system programming. Operating from 3.0V to 3.6V VCCIO with internal 3.3V tolerance, the part is well suited to bridging legacy 5V logic to modern 3.3V ASICs/ASICs and microcontrollers.
The MAX 3000A architecture combines a classic EEPROM-based configuration memory (so the device powers up instantly with its design loaded) with multi-level interconnect, enabling design IP portability across the MAX 3000A family. The 7.5ns tPD (pin-to-pin) figure makes it one of the faster members of the family, while still offering lower static power than larger MAX II devices for non-timing-critical glue logic.
Typical applications include bus decoding and address mapping for legacy microcontrollers and x86 systems, 5V-to-3.3V level translation glue logic, peripheral control state machines (UART, I2C, SPI bridges), and PCI/cPCI bus interface bridging. Industrial designers also use the part for machine-control I/O expansion and as a hardware state machine replacing discrete 74-series logic.
A practical design consideration: although the EPM3256ATC144-7N is in-system programmable, the EEPROM programming step adds ~1 second to prototype iteration; Quartus II design tools are required (legacy MAX+PLUS II also supported). For new designs where boot latency is acceptable, MAX II CPLDs offer higher density at similar price points, so the MAX 3000A remains the preferred choice for legacy pin-compatible upgrades.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with full cross-reference and lifetime-buy guidance.
Alternativas drop-in para EPM3256ATC144-7N — 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 EPM3256ATC144-7N (mesmo formato e footprint) — diferindo em Package, Operating Temperature, Propagation Delay (tPD), RoHS Status, JTAG Support.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
EPM3256ATC144-7
✅ Drop-In✓ Em estoque
$17.06 / unidade
Ver ficha técnica →EPM3256ATC144-10N
✅ Drop-In✓ Em estoque
$14.5 / unidade
Ver ficha técnica →EPM3256ATC144-10AA
✅ Drop-In✓ Em estoque
$11.6 / unidade
Ver ficha técnica →EPM3128ATC144-7N
✅ Drop-In✓ Em estoque
$9.25 / unidade
Ver ficha técnica →EPM3256ATC100-10N
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
EPM3256ATC144-7N Classificações máximas e características elétricas
| Family | MAX 3000A |
| Device Type | CPLD - Complex Programmable Logic Device |
| Macro Cells | 256 |
| Logic Gates (usable) | 5,000 |
| Number of Logic Array Blocks (LABs) | 16 |
| User I/Os | 116 |
| Propagation Delay (tPD) | 7.5 ns |
| Maximum Internal Frequency | 126.6 MHz |
| Supply Voltage (VCCIO) | 3.0 V to 3.6 V |
| Programmable Logic Technology | CMOS EEPROM-based |
| In-System Programmable (ISP) | Yes (3.3 V) |
| Temperatura de operação | 0C to +70C (Commercial) |
| Encapsulamento | 144-pin TQFP |
| Tipo de montagem | Surface Mount |
| Logic Family | CMOS |
| JTAG Support | IEEE 1149.1 boundary-scan |
| Status RoHS | Compliant |
Configuração de pinos do EPM3256ATC144-7N
| Pino 1 | I/O — User I/O (bank 1) |
| Pino 2 | I/O — User I/O (bank 1) |
| Pino 3 | I/O — User I/O (bank 1) |
| Pino 4 | I/O — User I/O (bank 1) |
| Pino 5 | I/O — User I/O (bank 1) |
| Pino 6 | I/O — User I/O (bank 1) |
| Pino 7 | I/O — User I/O (bank 1) |
| Pino 8 | I/O — User I/O (bank 1) |
| Pino 9 | VCCIO — I/O supply voltage (3.3V) |
| Pino 10 | GND — Ground |
| Pino 11 | I/O — User I/O (bank 1) |
| Pino 12 | I/O — User I/O (bank 1) |
| Pino 13 | I/O — User I/O (bank 1) |
| Pino 14 | I/O — User I/O (bank 1) |
| Pino 15 | I/O — User I/O (bank 1) |
| Pino 16 | I/O — User I/O (bank 1) |
| Pino 17 | I/O — User I/O (bank 1) |
| Pino 18 | I/O — User I/O (bank 1) |
| Pino 19 | TDI — JTAG Test Data In |
| Pino 20 | TMS — JTAG Test Mode Select |
| Pino 21 | TCK — JTAG Test Clock |
| Pino 22 | GND — Ground |
| Pino 23 | I/O — User I/O (bank 2) |
| Pino 24 | I/O — User I/O (bank 2) |
| Pino 25 | I/O — User I/O (bank 2) |
| Pino 26 | I/O — User I/O (bank 2) |
| Pino 27 | I/O — User I/O (bank 2) |
| Pino 28 | I/O — User I/O (bank 2) |
| Pino 29 | I/O — User I/O (bank 2) |
| Pino 30 | I/O — User I/O (bank 2) |
| Pino 31 | VCCIO — I/O supply voltage (3.3V) |
| Pino 32 | GND — Ground |
| Pino 33 | I/O — User I/O (bank 2) |
| Pino 34 | I/O — User I/O (bank 2) |
| Pino 35 | I/O — User I/O (bank 2) |
| Pino 36 | I/O — User I/O (bank 2) |
| Pino 37 | I/O — User I/O (bank 2) |
| Pino 38 | I/O — User I/O (bank 2) |
| Pino 39 | I/O — User I/O (bank 2) |
| Pino 40 | I/O — User I/O (bank 2) |
| Pino 41 | I/O — User I/O (bank 3) |
| Pino 42 | I/O — User I/O (bank 3) |
| Pino 43 | I/O — User I/O (bank 3) |
| Pino 44 | GND — Ground |
| Pino 45 | I/O — User I/O (bank 3) |
| Pino 46 | I/O — User I/O (bank 3) |
| Pino 47 | I/O — User I/O (bank 3) |
| Pino 48 | I/O — User I/O (bank 3) |
| Pino 49 | I/O — User I/O (bank 3) |
| Pino 50 | I/O — User I/O (bank 3) |
| Pino 51 | VCCIO — I/O supply voltage (3.3V) |
| Pino 52 | GND — Ground |
| Pino 53 | I/O — User I/O (bank 3) |
| Pino 54 | I/O — User I/O (bank 3) |
| Pino 55 | I/O — User I/O (bank 3) |
| Pino 56 | I/O — User I/O (bank 3) |
| Pino 57 | I/O — User I/O (bank 3) |
| Pino 58 | I/O — User I/O (bank 3) |
| Pino 59 | I/O — User I/O (bank 3) |
| Pino 60 | I/O — User I/O (bank 3) |
| Pino 61 | I/O — User I/O (bank 4) |
| Pino 62 | I/O — User I/O (bank 4) |
| Pino 63 | I/O — User I/O (bank 4) |
| Pino 64 | I/O — User I/O (bank 4) |
| Pino 65 | GND — Ground |
| Pino 66 | I/O — User I/O (bank 4) |
| Pino 67 | I/O — User I/O (bank 4) |
| Pino 68 | I/O — User I/O (bank 4) |
| Pino 69 | I/O — User I/O (bank 4) |
| Pino 70 | I/O — User I/O (bank 4) |
| Pino 71 | I/O — User I/O (bank 4) |
| Pino 72 | VCCIO — I/O supply voltage (3.3V) |
| Pino 73 | GND — Ground |
| Pino 74 | I/O — User I/O (bank 4) |
| Pino 75 | I/O — User I/O (bank 4) |
| Pino 76 | I/O — User I/O (bank 4) |
| Pino 77 | I/O — User I/O (bank 4) |
| Pino 78 | I/O — User I/O (bank 4) |
| Pino 79 | I/O — User I/O (bank 4) |
| Pino 80 | I/O — User I/O (bank 4) |
| Pino 81 | I/O — User I/O (bank 4) |
| Pino 82 | I/O — User I/O (bank 4) |
| Pino 83 | GND — Ground |
| Pino 84 | I/O — User I/O (bank 4) |
| Pino 85 | I/O — User I/O (bank 4) |
| Pino 86 | I/O — User I/O (bank 4) |
| Pino 87 | I/O — User I/O (bank 4) |
| Pino 88 | I/O — User I/O (bank 4) |
| Pino 89 | VCCINT — Internal core supply (3.3V) |
| Pino 90 | GND — Ground |
| Pino 91 | I/O — User I/O (bank 5) |
| Pino 92 | I/O — User I/O (bank 5) |
| Pino 93 | I/O — User I/O (bank 5) |
| Pino 94 | I/O — User I/O (bank 5) |
| Pino 95 | I/O — User I/O (bank 5) |
| Pino 96 | I/O — User I/O (bank 5) |
| Pino 97 | I/O — User I/O (bank 5) |
| Pino 98 | I/O — User I/O (bank 5) |
| Pino 99 | I/O — User I/O (bank 5) |
| Pino 100 | I/O — User I/O (bank 5) |
| Pino 101 | VCCIO — I/O supply voltage (3.3V) |
| Pino 102 | GND — Ground |
| Pino 103 | I/O — User I/O (bank 5) |
| Pino 104 | I/O — User I/O (bank 5) |
| Pino 105 | I/O — User I/O (bank 5) |
| Pino 106 | I/O — User I/O (bank 5) |
| Pino 107 | I/O — User I/O (bank 5) |
| Pino 108 | I/O — User I/O (bank 5) |
| Pino 109 | I/O — User I/O (bank 5) |
| Pino 110 | I/O — User I/O (bank 5) |
| Pino 111 | GND — Ground |
| Pino 112 | I/O — User I/O (bank 6) |
| Pino 113 | I/O — User I/O (bank 6) |
| Pino 114 | I/O — User I/O (bank 6) |
| Pino 115 | I/O — User I/O (bank 6) |
| Pino 116 | I/O — User I/O (bank 6) |
| Pino 117 | I/O — User I/O (bank 6) |
| Pino 118 | I/O — User I/O (bank 6) |
| Pino 119 | I/O — User I/O (bank 6) |
| Pino 120 | TDO — JTAG Test Data Out |
| Pino 121 | GND — Ground |
| Pino 122 | I/O — User I/O (bank 6) |
| Pino 123 | I/O — User I/O (bank 6) |
| Pino 124 | I/O — User I/O (bank 6) |
| Pino 125 | I/O — User I/O (bank 6) |
| Pino 126 | I/O — User I/O (bank 6) |
| Pino 127 | I/O — User I/O (bank 6) |
| Pino 128 | I/O — User I/O (bank 6) |
| Pino 129 | VCCIO — I/O supply voltage (3.3V) |
| Pino 130 | I/O — User I/O (bank 6) |
| Pino 131 | I/O — User I/O (bank 6) |
| Pino 132 | I/O — User I/O (bank 6) |
| Pino 133 | I/O — User I/O (bank 6) |
| Pino 134 | I/O — User I/O (bank 6) |
| Pino 135 | I/O — User I/O (bank 6) |
| Pino 136 | I/O — User I/O (bank 6) |
| Pino 137 | I/O — User I/O (bank 6) |
| Pino 138 | GND — Ground |
| Pino 139 | I/O — User I/O (bank 6) |
| Pino 140 | I/O — User I/O (bank 6) |
| Pino 141 | I/O — User I/O (bank 6) |
| Pino 142 | I/O — User I/O (bank 6) |
| Pino 143 | I/O — User I/O (bank 6) |
| Pino 144 | I/O — User I/O (bank 6) |
Aplicações típicas
EPM3256ATC144-7N é adequado para 6 aplicaçãos: Legacy 5V-to-3.3V Level Translation Glue Logic, PCI Bus Interface Bridging, Industrial Machine-Control I/O Expansion, Peripheral State-Machine Controllers (UART/SPI/I2C Bridges), Address Decoding and Chip-Select Generation, Educational and Retro-Computing Platforms.
Legacy 5V-to-3.3V Level Translation Glue Logic
The EPM3256ATC144-7N's 5V-tolerant inputs and 3.3V CMOS outputs make it an ideal bus-translator for systems mixing legacy 5V peripherals (parallel port ASICs, older microcontrollers) with modern 3.3V ASICs and processors. The 116 user I/Os in 144-pin TQFP are sufficient to bridge full 32-bit data buses plus control signals. With 7.5 ns tPD, the device adds minimal latency to address-decoding paths, preserving timing margin on critical read/write cycles. The EEPROM-based instant-on behavior ensures the translation logic is active at power-up, eliminating bus contention during boot.
Recomendado
PCI Bus Interface Bridging
The EPM3256ATC144-7N's 7.5 ns tPD and 126.6 MHz internal frequency support 33 MHz PCI bus cycles with comfortable timing margin for address decoding, command qualification, and parity generation. The 116 I/Os in 144-pin TQFP accommodate full PCI bus signals (AD[31:0], C/BE[3:0], FRAME, IRDY, TRDY, DEVSEL, PAR, etc.) plus auxiliary logic for chipset glue. JTAG boundary-scan on every I/O simplifies in-system test and board-level diagnostics - critical for PCI compliance verification.
Recomendado
Industrial Machine-Control I/O Expansion
With 116 user I/Os and industrial-grade timing characteristics, the EPM3256ATC144-7N is widely deployed as a deterministic I/O expander for PLC backplanes and CNC machine controllers. Its instant-on EEPROM configuration eliminates FPGA-style boot flash and configuration failures on noisy factory power rails. The 7.5 ns tPD ensures deterministic response times for encoder quadrature decoding, PWM generation, and safety interlock logic. While commercial 0-70C temperature grade is shown, the JTAG and boundary-scan features simplify factory-floor board testing.
Recomendado
Peripheral State-Machine Controllers (UART/SPI/I2C Bridges)
The 256 macro cells of the EPM3256ATC144-7N are sufficient to implement multi-channel UART, SPI master/slave, and I2C controller bridges between microcontrollers and peripherals without burdening the host CPU. The 7.5 ns tPD supports standard SPI clock rates up to ~50 MHz in protocol mode. The deterministic timing of EEPROM-based CPLD logic eliminates software latency jitter and provides protocol-correct signaling even when the host CPU is overloaded, making it ideal for real-time motor-control and sensor-fusion applications.
Recomendado
Address Decoding and Chip-Select Generation
The EPM3256ATC144-7N is a classic choice for generating up to 16-32 chip-select or enable signals in memory-mapped systems. The 256 macro cells easily decode 24-32 address lines with wait-state insertion logic. With 7.5 ns tPD, the decoded chip-select arrives well within typical memory access cycles, supporting 50-66 MHz system buses. The instant-on EEPROM ensures the address map is valid at power-up, eliminating boot-time bus conflicts that can latch-up legacy peripherals.
Recomendado
Educational and Retro-Computing Platforms
The EPM3256ATC144-7N remains popular in university FPGA/CPLD labs and retro-computing projects (e.g., recreating classic 8-bit and 16-bit bus architectures) because of its Quartus II software support, well-documented timing, and predictable 7.5 ns behavior. Students can implement complete processor glue logic, address mapping, and interrupt controllers in a single device without dealing with FPGA boot/config issues. The 144-pin TQFP is breadboard-friendly with TQFP-to-DIP adapter boards widely available.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para EPM3256ATC144-7N — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | EPM3256ATC144-7 | EPM3256ATC144-10N | EPM3256ATC144-10AA | EPM3128ATC144-7N | EPM3256ATC100-10N |
|---|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera | Altera |
| Package | 144-pin TQFP | 144-pin TQFP | 144-pin TQFP | 144-pin TQFP | 144-pin TQFP | 100-pin TQFP |
| Macro Cells | 256 | 256 | 256 | 256 | 128 | 256 |
| Propagation Delay (tPD) | 7.5 ns | 7.5 ns | 10 ns | 10 ns | 7.5 ns | 10 ns |
| User I/Os | 116 | 116 | 116 | 116 | 96 | 80 |
| Maximum Internal Frequency | 126.6 MHz | 126.6 MHz | 100 MHz | 100 MHz | 126.6 MHz | 100 MHz |
| Supply Voltage (VCCIO) | 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 |
| Operating Temperature | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C |
| Lifecycle Status | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy |
Principais diferenciais
- 7.5 ns tPD is the fastest speed grade in the MAX 3000A family at 144 pins (vs EPM3256ATC144-10N)
- 256 macro cells double the logic capacity of smaller MAX 3000A family members (vs EPM3128ATC144-7N)
- EEPROM-based instant-on configuration eliminates boot flash (vs EPM240T100C5N (MAX II))
Notas de projeto
The EPM3256ATC144-7N operates from a single 3.3V supply; multiple VCCIO and VCCINT pins are distributed across the 144-TQFP package to manage switching current. Decouple each VCCIO pin with a 0.1uF ceramic capacitor placed within 100 mils of the pin, plus a single 10uF tantalum bulk capacitor near the device. The EEPROM configuration memory draws additional inrush during programming; provision at least 100uF of bulk capacitance on the 3.3V rail to support ISP via JTAG without triggering brown-out.
Use a 4-layer PCB with a continuous ground plane directly under the 144-TQFP footprint. Route all JTAG signals (TCK, TMS, TDI, TDO) with 50-ohm controlled impedance and keep total length under 6 inches to avoid signal-integrity issues during in-system programming. The Altera MAX 3000A datasheet recommends dedicated JTAG header access for prototype bring-up - do not share JTAG pins with user I/O without a multiplexer.
Do not assume 5V tolerance on every I/O - the EPM3256ATC144-7N accepts 5V TTL inputs but only when VCCIO is at 3.3V (not at higher voltages). Programming voltage is supplied internally via the on-chip charge pump; do not apply external programming voltage to any pin. Unused user I/Os must be set to 'output driving ground' in the Quartus II assignment, or left floating can cause additional ICC current draw exceeding 50 mA.
Estimated: At 126.6 MHz internal frequency with all 116 I/Os toggling at 25 MHz, dynamic power dissipation is approximately 250-400 mW. The 144-pin TQFP package has a theta_JA of approximately 35 C/W, so junction temperature rise above ambient is roughly 9-14C - well within the 0C to +70C commercial range. No heatsink is required. However, ensure adequate airflow if the device is mounted adjacent to high-power components.
Informações de conformidade
RoHS and REACH compliant per distributor listings. Commercial temperature grade 0C to +70C - AEC-Q100 qualification not available for this part. New programs should evaluate MAX II/MAX V for active lifecycle status.