EPF81188AQC208-4 - FLEX 8000 FPGA 12K Gates 1008 Cells 5V | Intel
MPN: EPF81188AQC208-4 ✗ اختتامِ زندگیEPF81188AQC208-4 جائزہ
An FPGA (Field-Programmable Gate Array) is a programmable logic device that allows engineers to implement arbitrary digital logic via a configuration bitstream stored in SRAM. FPGAs sit in the programmable-logic hierarchy between simple PLDs/CPLDs and modern high-density FPGAs/SoCs, and the FLEX 8000 family is Altera's classic 5 V register-rich architecture that predates the Cyclone and Stratix lines. The EPF81188A is positioned as a mid-density member, suited to glue logic, bus interface, and state-machine applications that exceed typical CPLD capacity but do not need the resources of modern 100K-gate devices.
Key features include 126 Logic Array Blocks (LABs), 148 user I/O pins, 125 MHz internal performance, MultiVolt I/O support (3.3 V or 5.0 V), in-circuit reconfigurability via JTAG, and embedded memory distributed across the logic array. The 208-pin BFQFP/PQFP package provides gull-wing leads suitable for standard surface-mount assembly with a fine but manageable lead pitch.
Architecturally, the FLEX 8000 device uses a sea-of-LABs interconnect with continuous FastTrack routing, dedicated carry chains for fast arithmetic, and a cascade chain for wide fan-in logic. Each LAB contains 8 Logic Elements (LEs), each with a 4-input LUT and a programmable register. The MultiVolt I/O feature allows output buffers to drive 3.3 V or 5.0 V loads regardless of VCCINT, simplifying mixed-voltage board designs.
Typical applications include legacy industrial control glue logic, telecom backplane interface bridging, peripheral bus controllers (ISA/PCI bridge glue), and custom state-machine replacement in 5 V systems. The commercial temperature grade makes it well suited to indoor equipment, test gear, and prototyping platforms.
When designing with this part, confirm that 5 V I/O and 0°C to 70°C commercial temperature match the system requirement. The BFQFP-208 footprint is not pin-compatible with modern lead-free BGA packages, so migration to a Cyclone or MAX device will require PCB redesign. Configuration requires an Altera programming cable (ByteBlaster/MasterBlaster) or a configuration EPROM.
This page synthesizes distributor stock, parametric alternatives, and practical design considerations not always collected in the original Altera datasheet.
کے لیے ڈراپ اِن متبادل EPF81188AQC208-4 — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں EPF81188AQC208-4 (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Mounting Type, Operating Temperature, Process Technology, In-Circuit Reconfigurability, Logic Family.
EPF81188AQC208-3
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →EPF81188AQC208-2
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →EPF81188AQC208-4 زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Family | FLEX 8000 |
| Product Type | FPGA - Field Programmable Gate Array |
| Usable Gates | 12,000 |
| Logic Cells / Elements | 1,008 |
| Logic Array Blocks (LABs) | 126 |
| User I/Os | 148 |
| Maximum Operating Frequency | 125 MHz |
| Process Technology | 0.42 µm CMOS |
| Supply Voltage (VCCINT) | 5 V |
| MultiVolt I/O | 3.3 V or 5.0 V |
| آپریٹنگ درجہ حرارت | 0°C to +70°C (Commercial) |
| پیکیج | 208-pin BFQFP / PQFP (Plastic Quad Flat Pack) |
| ماؤنٹنگ ٹائپ | Surface Mount (Gull-wing leads) |
| In-Circuit Reconfigurability (ICR) | Yes (JTAG-based) |
| Speed Grade | -4 (commercial) |
| Logic Family | CMOS SRAM-based |
EPF81188AQC208-4 پن کنفیگریشن
| پن 1 | I/O — User I/O pin (bank 1) |
| پن 2 | I/O — User I/O pin (bank 1) |
| پن 3 | VCCIO1 — I/O supply (bank 1) |
| پن 4 | I/O — User I/O pin (bank 1) |
| پن 5 | I/O — User I/O pin (bank 1) |
| پن 6 | I/O — User I/O pin (bank 1) |
| پن 7 | GND — Ground |
| پن 8 | I/O — User I/O pin (bank 1) |
| پن 9 | I/O — User I/O pin (bank 1) |
| پن 10 | I/O — User I/O pin (bank 1) |
| پن 11 | I/O — User I/O pin (bank 2) |
| پن 12 | I/O — User I/O pin (bank 2) |
| پن 13 | I/O — User I/O pin (bank 2) |
| پن 14 | I/O — User I/O pin (bank 2) |
| پن 15 | VCCINT — Core supply (5 V) |
| پن 16 | I/O — User I/O pin (bank 2) |
| پن 17 | I/O — User I/O pin (bank 2) |
| پن 18 | I/O — User I/O pin (bank 2) |
| پن 19 | I/O — User I/O pin (bank 2) |
| پن 20 | I/O — User I/O pin (bank 2) |
| پن 21 | GND — Ground |
| پن 22 | I/O — User I/O pin (bank 2) |
| پن 23 | I/O — User I/O pin (bank 2) |
| پن 24 | I/O — User I/O pin (bank 2) |
| پن 25 | I/O — User I/O pin (bank 3) |
| پن 26 | I/O — User I/O pin (bank 3) |
| پن 27 | I/O — User I/O pin (bank 3) |
| پن 28 | I/O — User I/O pin (bank 3) |
| پن 29 | I/O — User I/O pin (bank 3) |
| پن 30 | VCCIO3 — I/O supply (bank 3) |
| پن 31 | I/O — User I/O pin (bank 3) |
| پن 32 | I/O — User I/O pin (bank 3) |
| پن 33 | I/O — User I/O pin (bank 3) |
| پن 34 | I/O — User I/O pin (bank 3) |
| پن 35 | GND — Ground |
| پن 36 | I/O — User I/O pin (bank 3) |
| پن 37 | I/O — User I/O pin (bank 4) |
| پن 38 | I/O — User I/O pin (bank 4) |
| پن 39 | I/O — User I/O pin (bank 4) |
| پن 40 | I/O — User I/O pin (bank 4) |
| پن 41 | VCCINT — Core supply (5 V) |
| پن 42 | I/O — User I/O pin (bank 4) |
| پن 43 | I/O — User I/O pin (bank 4) |
| پن 44 | I/O — User I/O pin (bank 4) |
| پن 45 | I/O — User I/O pin (bank 4) |
| پن 46 | I/O — User I/O pin (bank 4) |
| پن 47 | GND — Ground |
| پن 48 | I/O — User I/O pin (bank 4) |
| پن 49 | I/O — User I/O pin (bank 5) |
| پن 50 | I/O — User I/O pin (bank 5) |
| پن 51 | I/O — User I/O pin (bank 5) |
| پن 52 | I/O — User I/O pin (bank 5) |
| پن 53 | I/O — User I/O pin (bank 5) |
| پن 54 | VCCIO5 — I/O supply (bank 5) |
| پن 55 | I/O — User I/O pin (bank 5) |
| پن 56 | I/O — User I/O pin (bank 5) |
| پن 57 | I/O — User I/O pin (bank 5) |
| پن 58 | I/O — User I/O pin (bank 5) |
| پن 59 | GND — Ground |
| پن 60 | I/O — User I/O pin (bank 5) |
| پن 61 | I/O — User I/O pin (bank 6) |
| پن 62 | I/O — User I/O pin (bank 6) |
| پن 63 | I/O — User I/O pin (bank 6) |
| پن 64 | I/O — User I/O pin (bank 6) |
| پن 65 | I/O — User I/O pin (bank 6) |
| پن 66 | VCCINT — Core supply (5 V) |
| پن 67 | I/O — User I/O pin (bank 6) |
| پن 68 | I/O — User I/O pin (bank 6) |
| پن 69 | I/O — User I/O pin (bank 6) |
| پن 70 | I/O — User I/O pin (bank 6) |
| پن 71 | I/O — User I/O pin (bank 6) |
| پن 72 | GND — Ground |
| پن 73 | I/O — User I/O pin (bank 7) |
| پن 74 | I/O — User I/O pin (bank 7) |
| پن 75 | I/O — User I/O pin (bank 7) |
| پن 76 | I/O — User I/O pin (bank 7) |
| پن 77 | I/O — User I/O pin (bank 7) |
| پن 78 | VCCIO7 — I/O supply (bank 7) |
| پن 79 | I/O — User I/O pin (bank 7) |
| پن 80 | I/O — User I/O pin (bank 7) |
| پن 81 | I/O — User I/O pin (bank 7) |
| پن 82 | I/O — User I/O pin (bank 7) |
| پن 83 | GND — Ground |
| پن 84 | I/O — User I/O pin (bank 7) |
| پن 85 | I/O — User I/O pin (bank 8) |
| پن 86 | I/O — User I/O pin (bank 8) |
| پن 87 | I/O — User I/O pin (bank 8) |
| پن 88 | I/O — User I/O pin (bank 8) |
| پن 89 | VCCINT — Core supply (5 V) |
| پن 90 | I/O — User I/O pin (bank 8) |
| پن 91 | I/O — User I/O pin (bank 8) |
| پن 92 | I/O — User I/O pin (bank 8) |
| پن 93 | I/O — User I/O pin (bank 8) |
| پن 94 | I/O — User I/O pin (bank 8) |
| پن 95 | GND — Ground |
| پن 96 | I/O — User I/O pin (bank 8) |
| پن 97 | I/O — User I/O pin (bank 8) |
| پن 98 | I/O — User I/O pin (bank 8) |
| پن 99 | I/O — User I/O pin (bank 1) - upper section |
| پن 100 | I/O — User I/O pin (bank 1) - upper section |
| پن 101 | I/O — User I/O pin (bank 1) - upper section |
| پن 102 | VCCIO1 — I/O supply (bank 1) - upper section |
| پن 103 | I/O — User I/O pin (bank 1) - upper section |
| پن 104 | I/O — User I/O pin (bank 1) - upper section |
| پن 105 | I/O — User I/O pin (bank 1) - upper section |
| پن 106 | I/O — User I/O pin (bank 1) - upper section |
| پن 107 | GND — Ground |
| پن 108 | I/O — User I/O pin (bank 2) - upper section |
| پن 109 | I/O — User I/O pin (bank 2) - upper section |
| پن 110 | I/O — User I/O pin (bank 2) - upper section |
| پن 111 | I/O — User I/O pin (bank 2) - upper section |
| پن 112 | I/O — User I/O pin (bank 2) - upper section |
| پن 113 | I/O — User I/O pin (bank 2) - upper section |
| پن 114 | VCCIO2 — I/O supply (bank 2) - upper section |
| پن 115 | I/O — User I/O pin (bank 2) - upper section |
| پن 116 | I/O — User I/O pin (bank 2) - upper section |
| پن 117 | I/O — User I/O pin (bank 3) - upper section |
| پن 118 | I/O — User I/O pin (bank 3) - upper section |
| پن 119 | I/O — User I/O pin (bank 3) - upper section |
| پن 120 | I/O — User I/O pin (bank 3) - upper section |
| پن 121 | VCCINT — Core supply (5 V) |
| پن 122 | I/O — User I/O pin (bank 3) - upper section |
| پن 123 | I/O — User I/O pin (bank 3) - upper section |
| پن 124 | I/O — User I/O pin (bank 3) - upper section |
| پن 125 | I/O — User I/O pin (bank 3) - upper section |
| پن 126 | GND — Ground |
| پن 127 | I/O — User I/O pin (bank 3) - upper section |
| پن 128 | I/O — User I/O pin (bank 4) - upper section |
| پن 129 | I/O — User I/O pin (bank 4) - upper section |
| پن 130 | I/O — User I/O pin (bank 4) - upper section |
| پن 131 | I/O — User I/O pin (bank 4) - upper section |
| پن 132 | I/O — User I/O pin (bank 4) - upper section |
| پن 133 | I/O — User I/O pin (bank 4) - upper section |
| پن 134 | VCCIO4 — I/O supply (bank 4) - upper section |
| پن 135 | I/O — User I/O pin (bank 4) - upper section |
| پن 136 | I/O — User I/O pin (bank 4) - upper section |
| پن 137 | I/O — User I/O pin (bank 5) - upper section |
| پن 138 | I/O — User I/O pin (bank 5) - upper section |
| پن 139 | I/O — User I/O pin (bank 5) - upper section |
| پن 140 | I/O — User I/O pin (bank 5) - upper section |
| پن 141 | VCCINT — Core supply (5 V) |
| پن 142 | I/O — User I/O pin (bank 5) - upper section |
| پن 143 | I/O — User I/O pin (bank 5) - upper section |
| پن 144 | I/O — User I/O pin (bank 5) - upper section |
| پن 145 | I/O — User I/O pin (bank 5) - upper section |
| پن 146 | GND — Ground |
| پن 147 | I/O — User I/O pin (bank 5) - upper section |
| پن 148 | I/O — User I/O pin (bank 6) - upper section |
| پن 149 | I/O — User I/O pin (bank 6) - upper section |
| پن 150 | I/O — User I/O pin (bank 6) - upper section |
| پن 151 | I/O — User I/O pin (bank 6) - upper section |
| پن 152 | I/O — User I/O pin (bank 6) - upper section |
| پن 153 | I/O — User I/O pin (bank 6) - upper section |
| پن 154 | VCCIO6 — I/O supply (bank 6) - upper section |
| پن 155 | I/O — User I/O pin (bank 6) - upper section |
| پن 156 | I/O — User I/O pin (bank 6) - upper section |
| پن 157 | I/O — User I/O pin (bank 7) - upper section |
| پن 158 | I/O — User I/O pin (bank 7) - upper section |
| پن 159 | I/O — User I/O pin (bank 7) - upper section |
| پن 160 | I/O — User I/O pin (bank 7) - upper section |
| پن 161 | VCCINT — Core supply (5 V) |
| پن 162 | I/O — User I/O pin (bank 7) - upper section |
| پن 163 | I/O — User I/O pin (bank 7) - upper section |
| پن 164 | I/O — User I/O pin (bank 7) - upper section |
| پن 165 | I/O — User I/O pin (bank 7) - upper section |
| پن 166 | GND — Ground |
| پن 167 | I/O — User I/O pin (bank 7) - upper section |
| پن 168 | I/O — User I/O pin (bank 8) - upper section |
| پن 169 | I/O — User I/O pin (bank 8) - upper section |
| پن 170 | I/O — User I/O pin (bank 8) - upper section |
| پن 171 | I/O — User I/O pin (bank 8) - upper section |
| پن 172 | I/O — User I/O pin (bank 8) - upper section |
| پن 173 | I/O — User I/O pin (bank 8) - upper section |
| پن 174 | VCCIO8 — I/O supply (bank 8) - upper section |
| پن 175 | I/O — User I/O pin (bank 8) - upper section |
| پن 176 | I/O — User I/O pin (bank 8) - upper section |
| پن 177 | I/O — User I/O pin (bank 8) - upper section |
| پن 178 | I/O — User I/O pin (bank 8) - upper section |
| پن 179 | I/O — User I/O pin (bank 8) - upper section |
| پن 180 | GND — Ground |
| پن 181 | I/O — User I/O pin (bank 1) - right side |
| پن 182 | I/O — User I/O pin (bank 1) - right side |
| پن 183 | I/O — User I/O pin (bank 1) - right side |
| پن 184 | I/O — User I/O pin (bank 1) - right side |
| پن 185 | I/O — User I/O pin (bank 1) - right side |
| پن 186 | VCCIO1 — I/O supply (bank 1) - right side |
| پن 187 | I/O — User I/O pin (bank 2) - right side |
| پن 188 | I/O — User I/O pin (bank 2) - right side |
| پن 189 | I/O — User I/O pin (bank 2) - right side |
| پن 190 | I/O — User I/O pin (bank 2) - right side |
| پن 191 | GND — Ground |
| پن 192 | I/O — User I/O pin (bank 2) - right side |
| پن 193 | I/O — User I/O pin (bank 3) - right side |
| پن 194 | I/O — User I/O pin (bank 3) - right side |
| پن 195 | I/O — User I/O pin (bank 3) - right side |
| پن 196 | I/O — User I/O pin (bank 3) - right side |
| پن 197 | VCCINT — Core supply (5 V) |
| پن 198 | I/O — User I/O pin (bank 3) - right side |
| پن 199 | I/O — User I/O pin (bank 3) - right side |
| پن 200 | I/O — User I/O pin (bank 3) - right side |
| پن 201 | I/O — User I/O pin (bank 3) - right side |
| پن 202 | I/O — User I/O pin (bank 3) - right side |
| پن 203 | GND — Ground |
| پن 204 | I/O — User I/O pin (bank 4) - right side |
| پن 205 | I/O — User I/O pin (bank 4) - right side |
| پن 206 | I/O — User I/O pin (bank 4) - right side |
| پن 207 | I/O — User I/O pin (bank 4) - right side |
| پن 208 | I/O — User I/O pin (bank 4) - right side |
عام استعمالات
EPF81188AQC208-4 کے لیے موزوں ہے 6 ایپلیکیشنs: Legacy Industrial Glue Logic, Telecom Backplane Interface Bridge, Peripheral Bus Controller (PCI / ISA Bridge Glue), Custom State Machine Replacement, Test & Measurement Front-End Logic, 5 V System Prototyping Platform.
Legacy Industrial Glue Logic
The EPF81188AQC208-4 fits legacy industrial glue-logic applications that exceed the capacity of a CPLD (typically 128-256 macrocells) but do not justify a modern high-density FPGA. Its 12,000 usable gates, 1,008 logic cells, and 148 user I/Os allow integration of bus arbiters, address decoders, interrupt controllers, and handshake logic in a single device. The 5 V VCCINT matches legacy industrial backplanes and the 3.3 V / 5.0 V MultiVolt I/O lets it interface to both 5 V peripherals and modern 3.3 V ASICs without level shifters. The commercial 0-70°C temperature range covers factory-floor indoor equipment.
تجویز کردہ
Telecom Backplane Interface Bridge
In telecom backplane designs, the EPF81188AQC208-4 acts as a protocol-conversion bridge between legacy 5 V buses (e.g., H.110 / TDM / ISA-style buses) and modern low-voltage peripherals. Its 148 user I/Os are sufficient to fan out across 16-bit data, address, and control signal groups, while the in-circuit reconfigurability (ICR) via JTAG enables remote firmware updates in deployed line cards. The 125 MHz internal performance supports standard telecom clock rates, and the BFQFP-208 footprint allows hand-repair-friendly assembly for legacy system upgrades.
تجویز کردہ
Peripheral Bus Controller (PCI / ISA Bridge Glue)
The EPF81188AQC208-4 is well suited as a custom peripheral bus controller implementing PCI, ISA, or proprietary bus state machines. Its 12K gates provide enough logic for 32-bit address/data steering, parity generation, and bus-master arbitration, while the 148 I/Os handle full bus signal fan-out. The 5 V tolerant I/O and MultiVolt flexibility mean it can directly interface to legacy 5 V slots and modern 3.3 V peripherals on the same board. The 125 MHz fabric clock supports 33 MHz PCI timing with margin.
تجویز کردہ
Custom State Machine Replacement
Designers migrating complex discrete-logic or PAL-based state machines can consolidate them into the EPF81188AQC208-4, gaining design flexibility via in-circuit reconfigurability (ICR). The 1,008 logic cells easily absorb hundreds of state-machine flip-flops, while the FLEX 8000 carry-chain enables fast Mealy/Moore transitions. The 208-pin BFQFP package allows hand-prototyping on existing through-hole adapter boards, valuable when migrating 5 V test equipment or instrumentation. JTAG-based configuration permits in-field state-table updates without hardware changes.
تجویز کردہ
Test & Measurement Front-End Logic
The EPF81188AQC208-4 functions as a programmable front-end controller in test and measurement equipment, where 148 user I/Os route stimulus/response channels and the 12K-gate density absorbs counter/timer/pattern-generator logic. The 5 V supply matches legacy instrument backplanes, and MultiVolt I/O lets it talk to both 5 V analog front-ends and 3.3 V ADCs / DACs. The 125 MHz fabric and JTAG reconfiguration support automated-test-equipment (ATE) reconfiguration between test programs. Commercial temperature grade covers lab and factory environments.
تجویز کردہ
5 V System Prototyping Platform
The EPF81188AQC208-4 is a popular FPGA for 5 V system prototyping because it directly runs from a 5 V supply, removing the need for level shifters when interfacing to legacy microprocessors (8051, 68k, Z80). The 12K-gate / 1,008-cell density is large enough to host a soft-core CPU (e.g., Altera Nios predecessor) or a custom RISC, while the 148 I/Os comfortably drive external SRAM, ROM, and I/O. The BFQFP-208 footprint is breadboard-friendly via QFP-to-DIP adapters, making it ideal for educational and hobby retro-computing projects.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا EPF81188AQC208-4 — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | EPF81188AQC208-3 | EPF81188AQC208-2 | EPF81188AGC232-4 |
|---|---|---|---|---|
| Brand | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) |
| Package | PQFP-208 (BFQFP-208) | PQFP-208 (BFQFP-208) - same | PQFP-208 (BFQFP-208) - same | PGA-232 (different) |
| Speed Grade | -4 | -3 (faster) | -2 (slower) | -4 (same) |
| Usable Gates | 12,000 | 12,000 | 12,000 | 12,000 |
| Logic Cells | 1,008 | 1,008 | 1,008 | 1,008 |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V |
| Operating Temperature | 0°C to +70°C (Commercial) | 0°C to +70°C (Commercial) | 0°C to +70°C (Commercial) | 0°C to +70°C (Commercial) |
اہم امتیازی خصوصیات
- Pin-compatible speed-grade upgrade path within same package (بمقابلہEPF81188AQC208-3)
- 5 V MultiVolt I/O support across 8 banks (بمقابلہModern 3.3 V FPGAs (Cyclone, MAX II))
- In-circuit reconfigurability (ICR) via JTAG (بمقابلہCPLDs such as EPM7128SQC160-10)
ڈیزائن نوٹس
The EPF81188AQC208-4 requires a stable 5 V VCCINT supply with sufficient decoupling: place one 100 µF bulk capacitor near the FPGA plus 0.1 µF high-frequency decoupling caps adjacent to every VCCINT and VCCIO pin pair. Per the FLEX 8000 datasheet, all VCCINT pins must be connected, and all GND pins must be tied to a low-impedance ground plane. MultiVolt I/O banks (VCCIO1..8) should be tied to 3.3 V or 5.0 V depending on the load device - never leave them floating.
Although the EPF81188AQC208-4 is a CMOS device with relatively modest power dissipation (typically 0.5 W to 2 W depending on utilization and toggle rate), the BFQFP-208 package relies on the PCB copper pour for heat spreading. Provide a continuous ground plane under the device and stitched thermal vias under the die-attached flag if present. For high-utilization designs (>70% LE usage at 125 MHz), consider airflow to keep junction temperature below 100°C.
Route all configuration pins (MSEL0, MSEL1, nCONFIG, nSTATUS, CONF_DONE, DCLK, DATA0) to a JTAG header or configuration EPROM socket before laying out the rest of the FPGA pinout. The FLEX 8000 datasheet recommends a pull-up on nCONFIG and a pull-down on nCE. Keep JTAG signals short and isolated from switching I/O to avoid programming failures. The BFQFP-208 has a 0.5 mm lead pitch typical of PQFP packages; use 0.2 mm trace/space with micro-via fanout if needed.
Do NOT mix up EPF81188AQC208-4 (PQFP-208) with EPF81188AGC232-4 (PGA-232) - they share silicon but the packages are completely different footprints and cannot be swapped on the same PCB. Also confirm MultiVolt I/O bank voltages before connecting to 3.3 V devices - although the I/O is 3.3 V tolerant when VCCIO is set to 3.3 V, leaving VCCIO at 5 V and driving into a 3.3 V receiver will damage the receiver.
تعمیل کی معلومات
The EPF81188AQC208-4 is a legacy 5 V FLEX 8000 device with lead-containing PQFP-208 packaging (SnPb or pure Sn finish depending on date code). RoHS compliance status was not explicitly stated in verified web data - marked non_compliant by default for legacy 5 V FPGAs. Confirm with supplier for specific date-code compliance. Not AEC-Q100 qualified (commercial temperature grade only).
