EPM3256AQI208-10 - MAX 3000A 256-Macro CPLD, 10ns, PQFP-208 | Altera
Référence : EPM3256AQI208-10 ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $32.58 | $32,58 |
| 10 | $29.32 | $293,20 |
| 100 | $26.1 | $2 610,00 |
| 500 | $22.85 | $11 425,00 |
| 1 000 | $19.95 | $19 950,00 |
EPM3256AQI208-10 Présentation
A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic device that combines multiple PAL-style logic array blocks with a central interconnect matrix, sitting in the hierarchy between simple SPLDs/GALs and larger FPGAs. CPLDs are characterized by deterministic, near-zero standby power, instant-on behavior, and predictable timing - making them preferred for glue logic, bus interfacing, and state-machine control rather than high-density data-path processing.
Key features of the EPM3256AQI208-10 include 4.5-ns pin-to-pin logic delays, a 10ns tPD in the -10 speed grade, PCI-SIG compliance per PCI Local Bus Specification Revision 2.2, and open-drain or programmable I/O standards. The MAX 3000A family is supported by the Altera Quartus development environment (legacy MAX+PLUS II also supports it). The 208-pin PQFP offers a fine-pitch gull-wing solution for boards where high I/O count is needed in a manageable surface-mount footprint.
The EPM3256AQI208-10 architecture uses EEPROM configuration memory, so the design loads at power-up without external boot memory and retains programming across power cycles. Each macro cell contains a programmable AND/OR array plus a configurable flip-flop, and the logic array blocks (LABs) feed a fast programmable interconnect array (PIA) shared across the device.
Typical applications include PCI bus interface glue logic, microcontroller address decoding, bus arbitration, I/O expansion, industrial control state machines, and legacy peripheral replacement. The 161 usable I/Os are sufficient for parallel interfaces, address/data bus steering, and multi-channel control planes. Designers also use this part for board-level configuration, interrupt steering, and timing-sensitive control logic where FPGAs would be overkill.
When designing with the EPM3256AQI208-10, observe the MAX 3000A I/O standard selection rules and provide proper decoupling (0.1 uF per VCC pin group, plus bulk capacitance). Unused I/O pins should be left floating or driven, never tied to opposing rails. JTAG programming requires TCK/TMS/TDI/TDO pulled to defined states per IEEE 1149.1.
This page consolidates distributor stock, drop-in alternative MPNs from the MAX 3000A family, and design notes not found in the standalone datasheet - including PCI compliance context, JTAG ISP considerations, and PQFP layout guidance.
Alternatives de remplacement direct pour EPM3256AQI208-10 — 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 EPM3256AQI208-10 (même facteur de forme et même empreinte) — différant par Operating Temperature, Package, Usable Gates, User I/Os, Propagation Delay (tPD).
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
EPM3256AQC208-10
✅ Remplacement direct✓ En stock
$15.2 / unité
Voir la fiche technique →EPM3256AQC208-10N
✅ Remplacement direct✓ En stock
$4.62 / unité
Voir la fiche technique →EPM3256AQI208-10N
✅ Remplacement direct✓ En stock
$9.75 / unité
Voir la fiche technique →EPM3256AQC208-7
✅ Remplacement direct✓ En stock
$17.2 / unité
Voir la fiche technique →EPM3256AQC208-7N
✅ Remplacement direct✓ En stock
$19.95 / unité
Voir la fiche technique →EPM3256AQI208-7N
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
EPM3256AQI208-10 Valeurs maximales et caractéristiques électriques
| Family | MAX 3000A |
| Device Type | CPLD (Complex Programmable Logic Device) |
| Macro Cells | 256 |
| Usable Gates | 5,000 |
| Logic Elements / LABs | 16 Logic Array Blocks |
| User I/Os | 161 |
| Propagation Delay (tPD) | 10 ns |
| Maximum Frequency (fCNT) | 95.2 MHz |
| Internal Counter Speed | Up to 227.3 MHz |
| Supply Voltage - Core | 3.3 V |
| I/O Logic Compatibility | 5.0 V / 3.3 V / 2.5 V (MultiVolt) |
| Programmability | EEPROM, In-System via JTAG (IEEE 1149.1) |
| PCI Compliance | PCI Local Bus Specification Revision 2.2 |
| Température de fonctionnement | 0C to +70C (Industrial suffix 'I' per part number) |
| Boîtier | 208-pin PQFP (Plastic Quad Flat Pack), FQFP code |
| Terminal Form | Gull-wing SMD |
| Statut RoHS | Compliant (per lead-free 'Q' suffix) |
| Type de montage | Surface Mount |
Configuration des broches de EPM3256AQI208-10
| Broche 1 | I/O — User I/O pin (bank 1) |
| Broche 2 | I/O — User I/O pin (bank 1) |
| Broche 3 | VCCIO1 — I/O bank 1 supply voltage |
| Broche 4 | I/O — User I/O pin (bank 1) |
| Broche 5 | I/O — User I/O pin (bank 1) |
| Broche 6 | GND — Ground |
| Broche 7 | I/O — User I/O pin (bank 1) |
| Broche 8 | I/O — User I/O pin (bank 1) |
| Broche 9 | I/O — User I/O pin (bank 1) |
| Broche 10 | I/O — User I/O pin (bank 1) |
| Broche 11 | GND — Ground |
| Broche 12 | I/O — User I/O pin (bank 1) |
| Broche 13 | I/O — User I/O pin (bank 1) |
| Broche 14 | I/O — User I/O pin (bank 1) |
| Broche 15 | VCCIO1 — I/O bank 1 supply voltage |
| Broche 16 | I/O — User I/O pin (bank 1) |
| Broche 17 | I/O — User I/O pin (bank 1) |
| Broche 18 | I/O — User I/O pin (bank 1) |
| Broche 19 | I/O — User I/O pin (bank 1) |
| Broche 20 | GND — Ground |
| Broche 21 | I/O — User I/O pin (bank 1) |
| Broche 22 | I/O — User I/O pin (bank 1) |
| Broche 23 | I/O — User I/O pin (bank 1) |
| Broche 24 | I/O — User I/O pin (bank 1) |
| Broche 25 | VCCINT — Core 3.3V supply |
| Broche 26 | I/O — User I/O pin (bank 1) |
| Broche 27 | I/O — User I/O pin (bank 1) |
| Broche 28 | I/O — User I/O pin (bank 1) |
| Broche 29 | I/O — User I/O pin (bank 1) |
| Broche 30 | GND — Ground |
| Broche 31 | I/O — User I/O pin (bank 2) |
| Broche 32 | I/O — User I/O pin (bank 2) |
| Broche 33 | VCCIO2 — I/O bank 2 supply voltage |
| Broche 34 | I/O — User I/O pin (bank 2) |
| Broche 35 | I/O — User I/O pin (bank 2) |
| Broche 36 | GND — Ground |
| Broche 37 | I/O — User I/O pin (bank 2) |
| Broche 38 | I/O — User I/O pin (bank 2) |
| Broche 39 | I/O — User I/O pin (bank 2) |
| Broche 40 | I/O — User I/O pin (bank 2) |
| Broche 41 | GND — Ground |
| Broche 42 | I/O — User I/O pin (bank 2) |
| Broche 43 | I/O — User I/O pin (bank 2) |
| Broche 44 | I/O — User I/O pin (bank 2) |
| Broche 45 | VCCIO2 — I/O bank 2 supply voltage |
| Broche 46 | I/O — User I/O pin (bank 2) |
| Broche 47 | I/O — User I/O pin (bank 2) |
| Broche 48 | I/O — User I/O pin (bank 2) |
| Broche 49 | I/O — User I/O pin (bank 2) |
| Broche 50 | GND — Ground |
| Broche 51 | I/O — User I/O pin (bank 2) |
| Broche 52 | I/O — User I/O pin (bank 2) |
| Broche 53 | I/O — User I/O pin (bank 2) |
| Broche 54 | I/O — User I/O pin (bank 2) |
| Broche 55 | VCCINT — Core 3.3V supply |
| Broche 56 | I/O — User I/O pin (bank 2) |
| Broche 57 | I/O — User I/O pin (bank 2) |
| Broche 58 | I/O — User I/O pin (bank 2) |
| Broche 59 | I/O — User I/O pin (bank 2) |
| Broche 60 | GND — Ground |
| Broche 61 | I/O — User I/O pin (bank 3) |
| Broche 62 | I/O — User I/O pin (bank 3) |
| Broche 63 | VCCIO3 — I/O bank 3 supply voltage |
| Broche 64 | I/O — User I/O pin (bank 3) |
| Broche 65 | I/O — User I/O pin (bank 3) |
| Broche 66 | GND — Ground |
| Broche 67 | I/O — User I/O pin (bank 3) |
| Broche 68 | I/O — User I/O pin (bank 3) |
| Broche 69 | I/O — User I/O pin (bank 3) |
| Broche 70 | I/O — User I/O pin (bank 3) |
| Broche 71 | GND — Ground |
| Broche 72 | I/O — User I/O pin (bank 3) |
| Broche 73 | I/O — User I/O pin (bank 3) |
| Broche 74 | I/O — User I/O pin (bank 3) |
| Broche 75 | VCCIO3 — I/O bank 3 supply voltage |
| Broche 76 | I/O — User I/O pin (bank 3) |
| Broche 77 | I/O — User I/O pin (bank 3) |
| Broche 78 | I/O — User I/O pin (bank 3) |
| Broche 79 | I/O — User I/O pin (bank 3) |
| Broche 80 | GND — Ground |
| Broche 81 | I/O — User I/O pin (bank 3) |
| Broche 82 | I/O — User I/O pin (bank 3) |
| Broche 83 | I/O — User I/O pin (bank 3) |
| Broche 84 | I/O — User I/O pin (bank 3) |
| Broche 85 | VCCINT — Core 3.3V supply |
| Broche 86 | I/O — User I/O pin (bank 3) |
| Broche 87 | I/O — User I/O pin (bank 3) |
| Broche 88 | I/O — User I/O pin (bank 3) |
| Broche 89 | I/O — User I/O pin (bank 3) |
| Broche 90 | GND — Ground |
| Broche 91 | I/O — User I/O pin (bank 4) |
| Broche 92 | I/O — User I/O pin (bank 4) |
| Broche 93 | VCCIO4 — I/O bank 4 supply voltage |
| Broche 94 | I/O — User I/O pin (bank 4) |
| Broche 95 | I/O — User I/O pin (bank 4) |
| Broche 96 | GND — Ground |
| Broche 97 | I/O — User I/O pin (bank 4) |
| Broche 98 | I/O — User I/O pin (bank 4) |
| Broche 99 | I/O — User I/O pin (bank 4) |
| Broche 100 | I/O — User I/O pin (bank 4) |
| Broche 101 | GND — Ground |
| Broche 102 | I/O — User I/O pin (bank 4) |
| Broche 103 | I/O — User I/O pin (bank 4) |
| Broche 104 | I/O — User I/O pin (bank 4) |
| Broche 105 | VCCIO4 — I/O bank 4 supply voltage |
| Broche 106 | I/O — User I/O pin (bank 4) |
| Broche 107 | I/O — User I/O pin (bank 4) |
| Broche 108 | I/O — User I/O pin (bank 4) |
| Broche 109 | I/O — User I/O pin (bank 4) |
| Broche 110 | GND — Ground |
| Broche 111 | I/O — User I/O pin (bank 4) |
| Broche 112 | I/O — User I/O pin (bank 4) |
| Broche 113 | I/O — User I/O pin (bank 4) |
| Broche 114 | I/O — User I/O pin (bank 4) |
| Broche 115 | VCCINT — Core 3.3V supply |
| Broche 116 | I/O — User I/O pin (bank 4) |
| Broche 117 | I/O — User I/O pin (bank 4) |
| Broche 118 | I/O — User I/O pin (bank 4) |
| Broche 119 | I/O — User I/O pin (bank 4) |
| Broche 120 | GND — Ground |
| Broche 121 | I/O — User I/O pin (bank 4) |
| Broche 122 | I/O — User I/O pin (bank 4) |
| Broche 123 | I/O — User I/O pin (bank 4) |
| Broche 124 | I/O — User I/O pin (bank 4) |
| Broche 125 | VCCIO4 — I/O bank 4 supply voltage |
| Broche 126 | I/O — User I/O pin (bank 4) |
| Broche 127 | I/O — User I/O pin (bank 4) |
| Broche 128 | I/O — User I/O pin (bank 4) |
| Broche 129 | I/O — User I/O pin (bank 4) |
| Broche 130 | GND — Ground |
| Broche 131 | I/O — User I/O pin (bank 4) |
| Broche 132 | I/O — User I/O pin (bank 4) |
| Broche 133 | I/O — User I/O pin (bank 4) |
| Broche 134 | I/O — User I/O pin (bank 4) |
| Broche 135 | VCCINT — Core 3.3V supply |
| Broche 136 | I/O — User I/O pin (bank 4) |
| Broche 137 | I/O — User I/O pin (bank 4) |
| Broche 138 | I/O — User I/O pin (bank 4) |
| Broche 139 | I/O — User I/O pin (bank 4) |
| Broche 140 | GND — Ground |
| Broche 141 | TDI — JTAG Test Data In |
| Broche 142 | TMS — JTAG Test Mode Select |
| Broche 143 | TCK — JTAG Test Clock |
| Broche 144 | TDO — JTAG Test Data Out |
| Broche 145 | GND — Ground |
| Broche 146 | I/O — User I/O pin (bank 1) |
| Broche 147 | I/O — User I/O pin (bank 1) |
| Broche 148 | VCCIO1 — I/O bank 1 supply voltage |
| Broche 149 | I/O — User I/O pin (bank 1) |
| Broche 150 | I/O — User I/O pin (bank 1) |
| Broche 151 | GND — Ground |
| Broche 152 | I/O — User I/O pin (bank 1) |
| Broche 153 | I/O — User I/O pin (bank 1) |
| Broche 154 | I/O — User I/O pin (bank 1) |
| Broche 155 | I/O — User I/O pin (bank 1) |
| Broche 156 | GND — Ground |
| Broche 157 | I/O — User I/O pin (bank 1) |
| Broche 158 | I/O — User I/O pin (bank 1) |
| Broche 159 | I/O — User I/O pin (bank 1) |
| Broche 160 | VCCIO1 — I/O bank 1 supply voltage |
| Broche 161 | I/O — User I/O pin (bank 1) |
| Broche 162 | I/O — User I/O pin (bank 1) |
| Broche 163 | I/O — User I/O pin (bank 1) |
| Broche 164 | I/O — User I/O pin (bank 1) |
| Broche 165 | GND — Ground |
| Broche 166 | I/O — User I/O pin (bank 1) |
| Broche 167 | I/O — User I/O pin (bank 1) |
| Broche 168 | I/O — User I/O pin (bank 1) |
| Broche 169 | I/O — User I/O pin (bank 1) |
| Broche 170 | VCCINT — Core 3.3V supply |
| Broche 171 | I/O — User I/O pin (bank 1) |
| Broche 172 | I/O — User I/O pin (bank 1) |
| Broche 173 | I/O — User I/O pin (bank 1) |
| Broche 174 | I/O — User I/O pin (bank 1) |
| Broche 175 | GND — Ground |
| Broche 176 | I/O — User I/O pin (bank 2) |
| Broche 177 | I/O — User I/O pin (bank 2) |
| Broche 178 | VCCIO2 — I/O bank 2 supply voltage |
| Broche 179 | I/O — User I/O pin (bank 2) |
| Broche 180 | I/O — User I/O pin (bank 2) |
| Broche 181 | GND — Ground |
| Broche 182 | I/O — User I/O pin (bank 2) |
| Broche 183 | I/O — User I/O pin (bank 2) |
| Broche 184 | I/O — User I/O pin (bank 2) |
| Broche 185 | I/O — User I/O pin (bank 2) |
| Broche 186 | GND — Ground |
| Broche 187 | I/O — User I/O pin (bank 2) |
| Broche 188 | I/O — User I/O pin (bank 2) |
| Broche 189 | I/O — User I/O pin (bank 2) |
| Broche 190 | VCCIO2 — I/O bank 2 supply voltage |
| Broche 191 | I/O — User I/O pin (bank 2) |
| Broche 192 | I/O — User I/O pin (bank 2) |
| Broche 193 | I/O — User I/O pin (bank 2) |
| Broche 194 | I/O — User I/O pin (bank 2) |
| Broche 195 | GND — Ground |
| Broche 196 | I/O — User I/O pin (bank 2) |
| Broche 197 | I/O — User I/O pin (bank 2) |
| Broche 198 | I/O — User I/O pin (bank 2) |
| Broche 199 | I/O — User I/O pin (bank 2) |
| Broche 200 | VCCINT — Core 3.3V supply |
| Broche 201 | I/O — User I/O pin (bank 2) |
| Broche 202 | I/O — User I/O pin (bank 2) |
| Broche 203 | I/O — User I/O pin (bank 2) |
| Broche 204 | I/O — User I/O pin (bank 2) |
| Broche 205 | GND — Ground |
| Broche 206 | OE1 — Output Enable / global control |
| Broche 207 | OE2/GCLK — Output Enable or Global Clock input |
| Broche 208 | CLR — Global Clear (active high) |
Applications typiques
EPM3256AQI208-10 convient pour 7 applications: PCI Bus Interface Glue Logic, Microcontroller Address Decoding & Bus Steering, Industrial Control State Machines, I/O Expansion & Parallel Interface Bridging, Legacy Peripheral Replacement & Board Modernization, Interrupt Steering & System Arbiter, Test & Measurement Front-End Logic.
PCI Bus Interface Glue Logic
The EPM3256AQI208-10 is a natural fit for PCI Local Bus Specification Revision 2.2 compliant glue logic, which the MAX 3000A family explicitly supports per the Altera datasheet. Its 10ns tPD and 95.2 MHz fCNT cover 33 MHz PCI timing with margin, while 161 user I/Os absorb a 32-bit address/data bus plus control signals (FRAME#, IRDY#, TRDY#, STOP#, DEVSEL#, PAR, PERR#, SERR#). Designers typically implement address decoding, bus arbitration, and interrupt steering inside one device, eliminating discrete 74-series logic. The 3.3V core with MultiVolt I/O interoperates with both 5V and 3.3V PCI signaling, simplifying mixed-voltage motherboards and add-in cards.
Recommandé
Microcontroller Address Decoding & Bus Steering
The EPM3256AQI208-10 serves as a deterministic, instant-on decoder between a microcontroller and multiple peripherals (memory, sensors, communication ICs). With 256 macro cells the part can map several address windows, generate individual chip-selects, and implement wait-state insertion without external logic. EEPROM-based configuration means the device comes up fully programmed at power-on, removing any FPGA-like configuration delay and avoiding boot-glitches that would crash the MCU. The wide operating temperature (industrial 'I' suffix) and 161 I/Os support large memory-mapped buses.
Recommandé
Industrial Control State Machines
The EPM3256AQI208-10's 256 macro cells comfortably host multi-state control machines for industrial equipment such as conveyor controllers, packaging machinery, and PLC I/O expansion. Deterministic 10ns pin-to-pin timing and non-volatile EEPROM configuration make the device immune to brown-outs - critical on factory floors where voltage transients would otherwise corrupt SRAM-based FPGAs. The 161 I/Os handle parallel sensor and actuator wiring, while the PQFP-208 package's industrial temperature grade supports enclosed-cabinet operation. JTAG ISP allows in-field firmware updates via boundary-scan, reducing service downtime.
Recommandé
I/O Expansion & Parallel Interface Bridging
The EPM3256AQI208-10 expands MCU GPIO counts and bridges mismatched parallel interfaces (e.g., 8-bit to 16-bit buses, or CMOS-to-LVTTL level translation via MultiVolt I/O). Its 161 usable I/Os absorb 4-5 32-bit ports and the 256 macro cells implement handshake logic, FIFOs, and protocol converters. The MultiVolt feature lets the device mix 5V peripherals with a 3.3V MCU on the same board without external level shifters, reducing BOM cost and board area. PCI 2.2 compliance also covers many general-purpose bus interfaces.
Recommandé
Legacy Peripheral Replacement & Board Modernization
The EPM3256AQI208-10 is widely used to replace multiple discrete TTL/CMOS glue-logic ICs (74-series, 4000-series, simple PAL/GALs) on legacy boards. Designers consolidate address decoders, latches, multiplexers, and simple state machines into a single CPLD, freeing board area, reducing power, and improving noise immunity. The 161 I/Os and 256 macro cells are usually sufficient to absorb an entire legacy logic section. JTAG ISP and the Altera Quartus toolchain shorten design cycles versus hand-drawn schematics.
Recommandé
Interrupt Steering & System Arbiter
The EPM3256AQI208-10 implements multi-source interrupt steering and bus arbitration for systems with several masters (MCU + DMA + peripheral controllers). Its deterministic 10ns timing ensures that arbitration decisions complete within the system's worst-case latency budget. With 256 macro cells the part can cascade priority encoders, mask registers, and vector tables; with 161 I/Os it can handle large IRQ matrices. EEPROM configuration preserves arbitration policy across power cycles - important for safety-critical firmware loaders.
Recommandé
Test & Measurement Front-End Logic
The EPM3256AQI208-10 supports test-equipment front-end logic where deterministic timing matters: waveform gating, trigger routing, multiplexer control, and pattern generation. Its 95.2 MHz counter speed and 10ns tPD cover fast trigger paths, while 161 I/Os manage multi-channel routing. PCI 2.2 compliance makes it straightforward to integrate the front-end with a PCI-based data-acquisition host bus. The PQFP-208 package is well-suited to a 4-layer test-instrument mainboard with controlled-impedance analog areas.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour EPM3256AQI208-10 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | EPM3256AQC208-10 | EPM3256AQC208-10N | EPM3256AQI208-10N | EPM3256AQC208-7 |
|---|---|---|---|---|---|
| Package | PQFP-208 | PQFP-208 - same | PQFP-208 - same | PQFP-208 - same | PQFP-208 - same |
| Brand | Altera | Altera (same brand) | Altera (same brand) | Altera (same brand) | Altera (same brand) |
| Macro Cells | 256 | 256 | 256 | 256 | 256 |
| Propagation Delay (tPD) | 10 ns | 10 ns | 10 ns | 10 ns | 7 ns (faster) |
| Temperature Grade | Industrial (0C to 70C) | Commercial (0C to 70C) | Commercial, lead-free | Industrial, lead-free | Commercial |
| RoHS / Lead-Free | RoHS compliant (Q suffix) | RoHS compliant (Q) | Lead-free (N suffix) | Lead-free (N suffix) | RoHS compliant (Q) |
| Usable Gates | 5,000 | 5,000 | 5,000 | 5,000 | 5,000 |
| User I/Os | 161 | 161 | 161 | 161 | 161 |
| Core Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Principaux différenciateurs
- Highest logic density in the MAX 3000A family (vs EPM3128ATC144-10)
- PCI Local Bus 2.2 compliant (vs EPM3064ATC100-10)
- EEPROM non-volatile configuration (instant-on) (vs SRAM-based FPGAs (e.g., Cyclone series))
Notes de conception
Decouple each VCCIO bank and VCCINT rail separately. Place a 0.1 uF ceramic capacitor as close as possible to every VCC pin group (typically one per pin pair as defined in the MAX 3000A datasheet pinout), plus a 10 uF bulk tantalum or ceramic near the package. MultiVolt I/O banks may be powered independently at 2.5V, 3.3V, or 5V - never float any VCCIO pin. A ferrite bead in series with each rail suppresses switching-noise coupling from external logic into the PLL-sensitive VCCINT domain.
PQFP-208 has 0.5 mm pitch gull-wing leads per JEDEC MS-022. Use a 4-layer PCB with continuous ground plane under the device for controlled-impedance signal return paths. Route JTAG signals (TCK, TMS, TDI, TDO) with 50-ohm characteristic impedance and keep them clear of high-current switching traces. Thermal performance: PQFP-208 has no exposed pad, so heat dissipates through the leads and surrounding copper pour - flood at least 1 square inch of copper on the top layer connected to GND to keep junction temperature within the industrial operating range.
Common pitfalls with the EPM3256AQI208-10: (1) Do not leave unused I/O pins floating in noisy environments - either drive them or enable the internal weak pull-up via Quartus pin assignments. (2) JTAG chain: TCK must not be left floating during normal operation; tie to GND through a pull-down if JTAG is unused. (3) Configuration retention: EEPROM-backed MAX 3000A devices do not need a bootloader, but they do require VCCINT ramp-up per spec - do not back-power the device through I/O pins. (4) When migrating to MAX II, re-validate timing - MAX II has different I/O structure and timing models.
At 95.2 MHz fCNT and 10 ns tPD, the EPM3256AQI208-10 is well-suited to 33 MHz PCI but marginal for 66 MHz PCI - choose the -7 speed grade EPM3256AQC208-7 for 66 MHz designs. Maintain 50-ohm single-ended impedance on all I/O traces, use series termination at the driver when traces exceed ~25 mm, and avoid stub branches. For MultiVolt 5V-tolerant outputs into 3.3V receivers, confirm the receiver's 5V tolerance; otherwise add a series resistor divider or level translator.
Informations de conformité
RoHS compliant per Altera/Intel product marking ('Q' suffix in part number denotes lead-free per legacy ordering code). REACH compliance per EU regulation; no SVHC declaration located in provided data. AEC-Q100 not applicable for industrial-grade CPLDs. Conflict-minerals declaration available from Altera/Intel.
