EPM3256ATC144-7N - MAX 3000A CPLD 256 Macro 7.5ns | Altera
Référence : EPM3256ATC144-7N ⚠ Dernier achat| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour EPM3256ATC144-7N — 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 EPM3256ATC144-7N (même facteur de forme et même empreinte) — différant par Package, Operating Temperature, Propagation Delay (tPD), RoHS Status, JTAG Support.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
EPM3256ATC144-7
✅ Remplacement direct✓ En stock
$17.06 / unité
Voir la fiche technique →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 →EPM3128ATC144-7N
✅ Remplacement direct✓ En stock
$9.25 / unité
Voir la fiche technique →EPM3256ATC100-10N
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
EPM3256ATC144-7N Valeurs maximales et caractéristiques électriques
| 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) |
| Température de fonctionnement | 0C to +70C (Commercial) |
| Boîtier | 144-pin TQFP |
| Type de montage | Surface Mount |
| Logic Family | CMOS |
| JTAG Support | IEEE 1149.1 boundary-scan |
| Statut RoHS | Compliant |
Configuration des broches de EPM3256ATC144-7N
| Broche 1 | I/O — User I/O (bank 1) |
| Broche 2 | I/O — User I/O (bank 1) |
| Broche 3 | I/O — User I/O (bank 1) |
| Broche 4 | I/O — User I/O (bank 1) |
| Broche 5 | I/O — User I/O (bank 1) |
| Broche 6 | I/O — User I/O (bank 1) |
| Broche 7 | I/O — User I/O (bank 1) |
| Broche 8 | I/O — User I/O (bank 1) |
| Broche 9 | VCCIO — I/O supply voltage (3.3V) |
| Broche 10 | GND — Ground |
| Broche 11 | I/O — User I/O (bank 1) |
| Broche 12 | I/O — User I/O (bank 1) |
| Broche 13 | I/O — User I/O (bank 1) |
| Broche 14 | I/O — User I/O (bank 1) |
| Broche 15 | I/O — User I/O (bank 1) |
| Broche 16 | I/O — User I/O (bank 1) |
| Broche 17 | I/O — User I/O (bank 1) |
| Broche 18 | I/O — User I/O (bank 1) |
| Broche 19 | TDI — JTAG Test Data In |
| Broche 20 | TMS — JTAG Test Mode Select |
| Broche 21 | TCK — JTAG Test Clock |
| Broche 22 | GND — Ground |
| Broche 23 | I/O — User I/O (bank 2) |
| Broche 24 | I/O — User I/O (bank 2) |
| Broche 25 | I/O — User I/O (bank 2) |
| Broche 26 | I/O — User I/O (bank 2) |
| Broche 27 | I/O — User I/O (bank 2) |
| Broche 28 | I/O — User I/O (bank 2) |
| Broche 29 | I/O — User I/O (bank 2) |
| Broche 30 | I/O — User I/O (bank 2) |
| Broche 31 | VCCIO — I/O supply voltage (3.3V) |
| Broche 32 | GND — Ground |
| Broche 33 | I/O — User I/O (bank 2) |
| Broche 34 | I/O — User I/O (bank 2) |
| Broche 35 | I/O — User I/O (bank 2) |
| Broche 36 | I/O — User I/O (bank 2) |
| Broche 37 | I/O — User I/O (bank 2) |
| Broche 38 | I/O — User I/O (bank 2) |
| Broche 39 | I/O — User I/O (bank 2) |
| Broche 40 | I/O — User I/O (bank 2) |
| Broche 41 | I/O — User I/O (bank 3) |
| Broche 42 | I/O — User I/O (bank 3) |
| Broche 43 | I/O — User I/O (bank 3) |
| Broche 44 | GND — Ground |
| Broche 45 | I/O — User I/O (bank 3) |
| Broche 46 | I/O — User I/O (bank 3) |
| Broche 47 | I/O — User I/O (bank 3) |
| Broche 48 | I/O — User I/O (bank 3) |
| Broche 49 | I/O — User I/O (bank 3) |
| Broche 50 | I/O — User I/O (bank 3) |
| Broche 51 | VCCIO — I/O supply voltage (3.3V) |
| Broche 52 | GND — Ground |
| Broche 53 | I/O — User I/O (bank 3) |
| Broche 54 | I/O — User I/O (bank 3) |
| Broche 55 | I/O — User I/O (bank 3) |
| Broche 56 | I/O — User I/O (bank 3) |
| Broche 57 | I/O — User I/O (bank 3) |
| Broche 58 | I/O — User I/O (bank 3) |
| Broche 59 | I/O — User I/O (bank 3) |
| Broche 60 | I/O — User I/O (bank 3) |
| Broche 61 | I/O — User I/O (bank 4) |
| Broche 62 | I/O — User I/O (bank 4) |
| Broche 63 | I/O — User I/O (bank 4) |
| Broche 64 | I/O — User I/O (bank 4) |
| Broche 65 | GND — Ground |
| Broche 66 | I/O — User I/O (bank 4) |
| Broche 67 | I/O — User I/O (bank 4) |
| Broche 68 | I/O — User I/O (bank 4) |
| Broche 69 | I/O — User I/O (bank 4) |
| Broche 70 | I/O — User I/O (bank 4) |
| Broche 71 | I/O — User I/O (bank 4) |
| Broche 72 | VCCIO — I/O supply voltage (3.3V) |
| Broche 73 | GND — Ground |
| Broche 74 | I/O — User I/O (bank 4) |
| Broche 75 | I/O — User I/O (bank 4) |
| Broche 76 | I/O — User I/O (bank 4) |
| Broche 77 | I/O — User I/O (bank 4) |
| Broche 78 | I/O — User I/O (bank 4) |
| Broche 79 | I/O — User I/O (bank 4) |
| Broche 80 | I/O — User I/O (bank 4) |
| Broche 81 | I/O — User I/O (bank 4) |
| Broche 82 | I/O — User I/O (bank 4) |
| Broche 83 | GND — Ground |
| Broche 84 | I/O — User I/O (bank 4) |
| Broche 85 | I/O — User I/O (bank 4) |
| Broche 86 | I/O — User I/O (bank 4) |
| Broche 87 | I/O — User I/O (bank 4) |
| Broche 88 | I/O — User I/O (bank 4) |
| Broche 89 | VCCINT — Internal core supply (3.3V) |
| Broche 90 | GND — Ground |
| Broche 91 | I/O — User I/O (bank 5) |
| Broche 92 | I/O — User I/O (bank 5) |
| Broche 93 | I/O — User I/O (bank 5) |
| Broche 94 | I/O — User I/O (bank 5) |
| Broche 95 | I/O — User I/O (bank 5) |
| Broche 96 | I/O — User I/O (bank 5) |
| Broche 97 | I/O — User I/O (bank 5) |
| Broche 98 | I/O — User I/O (bank 5) |
| Broche 99 | I/O — User I/O (bank 5) |
| Broche 100 | I/O — User I/O (bank 5) |
| Broche 101 | VCCIO — I/O supply voltage (3.3V) |
| Broche 102 | GND — Ground |
| Broche 103 | I/O — User I/O (bank 5) |
| Broche 104 | I/O — User I/O (bank 5) |
| Broche 105 | I/O — User I/O (bank 5) |
| Broche 106 | I/O — User I/O (bank 5) |
| Broche 107 | I/O — User I/O (bank 5) |
| Broche 108 | I/O — User I/O (bank 5) |
| Broche 109 | I/O — User I/O (bank 5) |
| Broche 110 | I/O — User I/O (bank 5) |
| Broche 111 | GND — Ground |
| Broche 112 | I/O — User I/O (bank 6) |
| Broche 113 | I/O — User I/O (bank 6) |
| Broche 114 | I/O — User I/O (bank 6) |
| Broche 115 | I/O — User I/O (bank 6) |
| Broche 116 | I/O — User I/O (bank 6) |
| Broche 117 | I/O — User I/O (bank 6) |
| Broche 118 | I/O — User I/O (bank 6) |
| Broche 119 | I/O — User I/O (bank 6) |
| Broche 120 | TDO — JTAG Test Data Out |
| Broche 121 | GND — Ground |
| Broche 122 | I/O — User I/O (bank 6) |
| Broche 123 | I/O — User I/O (bank 6) |
| Broche 124 | I/O — User I/O (bank 6) |
| Broche 125 | I/O — User I/O (bank 6) |
| Broche 126 | I/O — User I/O (bank 6) |
| Broche 127 | I/O — User I/O (bank 6) |
| Broche 128 | I/O — User I/O (bank 6) |
| Broche 129 | VCCIO — I/O supply voltage (3.3V) |
| Broche 130 | I/O — User I/O (bank 6) |
| Broche 131 | I/O — User I/O (bank 6) |
| Broche 132 | I/O — User I/O (bank 6) |
| Broche 133 | I/O — User I/O (bank 6) |
| Broche 134 | I/O — User I/O (bank 6) |
| Broche 135 | I/O — User I/O (bank 6) |
| Broche 136 | I/O — User I/O (bank 6) |
| Broche 137 | I/O — User I/O (bank 6) |
| Broche 138 | GND — Ground |
| Broche 139 | I/O — User I/O (bank 6) |
| Broche 140 | I/O — User I/O (bank 6) |
| Broche 141 | I/O — User I/O (bank 6) |
| Broche 142 | I/O — User I/O (bank 6) |
| Broche 143 | I/O — User I/O (bank 6) |
| Broche 144 | I/O — User I/O (bank 6) |
Applications typiques
EPM3256ATC144-7N convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour EPM3256ATC144-7N — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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))
Notes de conception
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.
Informations de conformité
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.