EPM3256ATC144-7N - MAX 3000A CPLD 256 Macro 7.5ns | Altera
MPN: EPM3256ATC144-7N ⚠ Waktu Beli TerakhirEPM3256ATC144-7N Ringkasan
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.
Alternatif penggantian untuk EPM3256ATC144-7N — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian EPM3256ATC144-7N (sama faktor bentuk dan footprint) — berbeda di dalam Package, Operating Temperature, Propagation Delay (tPD), RoHS Status, JTAG Support.
EPM3256ATC144-7
✅ Drop-InKontak untuk harga
Lihat Datasheet →EPM3256ATC144-10N
✅ Drop-InKontak untuk harga
Lihat Datasheet →EPM3256ATC144-10AA
✅ Drop-InKontak untuk harga
Lihat Datasheet →EPM3128ATC144-7N
✅ Drop-InKontak untuk harga
Lihat Datasheet →EPM3256ATC100-10N
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
EPM3256ATC144-7N Rating Maksimal & Karakteristik Listrik
| 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) |
| Suhu Kerja | 0C to +70C (Commercial) |
| Paket | 144-pin TQFP |
| Tipe Mounting | Surface Mount |
| Logic Family | CMOS |
| JTAG Support | IEEE 1149.1 boundary-scan |
| Status RoHS | Compliant |
Konfigurasi Pin EPM3256ATC144-7N
| Pin produk 1 | I/O — User I/O (bank 1) |
| Pin produk 2 | I/O — User I/O (bank 1) |
| Pin produk 3 | I/O — User I/O (bank 1) |
| Pin produk 4 | I/O — User I/O (bank 1) |
| Pin produk 5 | I/O — User I/O (bank 1) |
| Pin produk 6 | I/O — User I/O (bank 1) |
| Pin produk 7 | I/O — User I/O (bank 1) |
| Pin produk 8 | I/O — User I/O (bank 1) |
| Pin produk 9 | VCCIO — I/O supply voltage (3.3V) |
| Pin produk 10 | GND — Ground |
| Pin produk 11 | I/O — User I/O (bank 1) |
| Pin produk 12 | I/O — User I/O (bank 1) |
| Pin produk 13 | I/O — User I/O (bank 1) |
| Pin produk 14 | I/O — User I/O (bank 1) |
| Pin produk 15 | I/O — User I/O (bank 1) |
| Pin produk 16 | I/O — User I/O (bank 1) |
| Pin produk 17 | I/O — User I/O (bank 1) |
| Pin produk 18 | I/O — User I/O (bank 1) |
| Pin produk 19 | TDI — JTAG Test Data In |
| Pin produk 20 | TMS — JTAG Test Mode Select |
| Pin produk 21 | TCK — JTAG Test Clock |
| Pin produk 22 | GND — Ground |
| Pin produk 23 | I/O — User I/O (bank 2) |
| Pin produk 24 | I/O — User I/O (bank 2) |
| Pin produk 25 | I/O — User I/O (bank 2) |
| Pin produk 26 | I/O — User I/O (bank 2) |
| Pin produk 27 | I/O — User I/O (bank 2) |
| Pin produk 28 | I/O — User I/O (bank 2) |
| Pin produk 29 | I/O — User I/O (bank 2) |
| Pin produk 30 | I/O — User I/O (bank 2) |
| Pin produk 31 | VCCIO — I/O supply voltage (3.3V) |
| Pin produk 32 | GND — Ground |
| Pin produk 33 | I/O — User I/O (bank 2) |
| Pin produk 34 | I/O — User I/O (bank 2) |
| Pin produk 35 | I/O — User I/O (bank 2) |
| Pin produk 36 | I/O — User I/O (bank 2) |
| Pin produk 37 | I/O — User I/O (bank 2) |
| Pin produk 38 | I/O — User I/O (bank 2) |
| Pin produk 39 | I/O — User I/O (bank 2) |
| Pin produk 40 | I/O — User I/O (bank 2) |
| Pin produk 41 | I/O — User I/O (bank 3) |
| Pin produk 42 | I/O — User I/O (bank 3) |
| Pin produk 43 | I/O — User I/O (bank 3) |
| Pin produk 44 | GND — Ground |
| Pin produk 45 | I/O — User I/O (bank 3) |
| Pin produk 46 | I/O — User I/O (bank 3) |
| Pin produk 47 | I/O — User I/O (bank 3) |
| Pin produk 48 | I/O — User I/O (bank 3) |
| Pin produk 49 | I/O — User I/O (bank 3) |
| Pin produk 50 | I/O — User I/O (bank 3) |
| Pin produk 51 | VCCIO — I/O supply voltage (3.3V) |
| Pin produk 52 | GND — Ground |
| Pin produk 53 | I/O — User I/O (bank 3) |
| Pin produk 54 | I/O — User I/O (bank 3) |
| Pin produk 55 | I/O — User I/O (bank 3) |
| Pin produk 56 | I/O — User I/O (bank 3) |
| Pin produk 57 | I/O — User I/O (bank 3) |
| Pin produk 58 | I/O — User I/O (bank 3) |
| Pin produk 59 | I/O — User I/O (bank 3) |
| Pin produk 60 | I/O — User I/O (bank 3) |
| Pin produk 61 | I/O — User I/O (bank 4) |
| Pin produk 62 | I/O — User I/O (bank 4) |
| Pin produk 63 | I/O — User I/O (bank 4) |
| Pin produk 64 | I/O — User I/O (bank 4) |
| Pin produk 65 | GND — Ground |
| Pin produk 66 | I/O — User I/O (bank 4) |
| Pin produk 67 | I/O — User I/O (bank 4) |
| Pin produk 68 | I/O — User I/O (bank 4) |
| Pin produk 69 | I/O — User I/O (bank 4) |
| Pin produk 70 | I/O — User I/O (bank 4) |
| Pin produk 71 | I/O — User I/O (bank 4) |
| Pin produk 72 | VCCIO — I/O supply voltage (3.3V) |
| Pin produk 73 | GND — Ground |
| Pin produk 74 | I/O — User I/O (bank 4) |
| Pin produk 75 | I/O — User I/O (bank 4) |
| Pin produk 76 | I/O — User I/O (bank 4) |
| Pin produk 77 | I/O — User I/O (bank 4) |
| Pin produk 78 | I/O — User I/O (bank 4) |
| Pin produk 79 | I/O — User I/O (bank 4) |
| Pin produk 80 | I/O — User I/O (bank 4) |
| Pin produk 81 | I/O — User I/O (bank 4) |
| Pin produk 82 | I/O — User I/O (bank 4) |
| Pin produk 83 | GND — Ground |
| Pin produk 84 | I/O — User I/O (bank 4) |
| Pin produk 85 | I/O — User I/O (bank 4) |
| Pin produk 86 | I/O — User I/O (bank 4) |
| Pin produk 87 | I/O — User I/O (bank 4) |
| Pin produk 88 | I/O — User I/O (bank 4) |
| Pin produk 89 | VCCINT — Internal core supply (3.3V) |
| Pin produk 90 | GND — Ground |
| Pin produk 91 | I/O — User I/O (bank 5) |
| Pin produk 92 | I/O — User I/O (bank 5) |
| Pin produk 93 | I/O — User I/O (bank 5) |
| Pin produk 94 | I/O — User I/O (bank 5) |
| Pin produk 95 | I/O — User I/O (bank 5) |
| Pin produk 96 | I/O — User I/O (bank 5) |
| Pin produk 97 | I/O — User I/O (bank 5) |
| Pin produk 98 | I/O — User I/O (bank 5) |
| Pin produk 99 | I/O — User I/O (bank 5) |
| Pin produk 100 | I/O — User I/O (bank 5) |
| Pin produk 101 | VCCIO — I/O supply voltage (3.3V) |
| Pin produk 102 | GND — Ground |
| Pin produk 103 | I/O — User I/O (bank 5) |
| Pin produk 104 | I/O — User I/O (bank 5) |
| Pin produk 105 | I/O — User I/O (bank 5) |
| Pin produk 106 | I/O — User I/O (bank 5) |
| Pin produk 107 | I/O — User I/O (bank 5) |
| Pin produk 108 | I/O — User I/O (bank 5) |
| Pin produk 109 | I/O — User I/O (bank 5) |
| Pin produk 110 | I/O — User I/O (bank 5) |
| Pin produk 111 | GND — Ground |
| Pin produk 112 | I/O — User I/O (bank 6) |
| Pin produk 113 | I/O — User I/O (bank 6) |
| Pin produk 114 | I/O — User I/O (bank 6) |
| Pin produk 115 | I/O — User I/O (bank 6) |
| Pin produk 116 | I/O — User I/O (bank 6) |
| Pin produk 117 | I/O — User I/O (bank 6) |
| Pin produk 118 | I/O — User I/O (bank 6) |
| Pin produk 119 | I/O — User I/O (bank 6) |
| Pin produk 120 | TDO — JTAG Test Data Out |
| Pin produk 121 | GND — Ground |
| Pin produk 122 | I/O — User I/O (bank 6) |
| Pin produk 123 | I/O — User I/O (bank 6) |
| Pin produk 124 | I/O — User I/O (bank 6) |
| Pin produk 125 | I/O — User I/O (bank 6) |
| Pin produk 126 | I/O — User I/O (bank 6) |
| Pin produk 127 | I/O — User I/O (bank 6) |
| Pin produk 128 | I/O — User I/O (bank 6) |
| Pin produk 129 | VCCIO — I/O supply voltage (3.3V) |
| Pin produk 130 | I/O — User I/O (bank 6) |
| Pin produk 131 | I/O — User I/O (bank 6) |
| Pin produk 132 | I/O — User I/O (bank 6) |
| Pin produk 133 | I/O — User I/O (bank 6) |
| Pin produk 134 | I/O — User I/O (bank 6) |
| Pin produk 135 | I/O — User I/O (bank 6) |
| Pin produk 136 | I/O — User I/O (bank 6) |
| Pin produk 137 | I/O — User I/O (bank 6) |
| Pin produk 138 | GND — Ground |
| Pin produk 139 | I/O — User I/O (bank 6) |
| Pin produk 140 | I/O — User I/O (bank 6) |
| Pin produk 141 | I/O — User I/O (bank 6) |
| Pin produk 142 | I/O — User I/O (bank 6) |
| Pin produk 143 | I/O — User I/O (bank 6) |
| Pin produk 144 | I/O — User I/O (bank 6) |
Aplikasi Umum
EPM3256ATC144-7N cocok untuk 6 aplikasis: 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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk EPM3256ATC144-7N — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | 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 |
Diferensiator Kunci
- 7.5 ns tPD is the fastest speed grade in the MAX 3000A family at 144 pins (vsEPM3256ATC144-10N)
- 256 macro cells double the logic capacity of smaller MAX 3000A family members (vsEPM3128ATC144-7N)
- EEPROM-based instant-on configuration eliminates boot flash (vsEPM240T100C5N (MAX II))
Catatan Desain
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.
Informasi Konformitas
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.