EPF10K20RI208-4U - FLEX 10K FPGA, 20K Gates, 208-Pin RQFP | Altera
部品番号: EPF10K20RI208-4U ⚠ ラストタイムバイ| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $74.75 | $74.75 |
| 10 | $67.28 | $672.80 |
| 100 | $59.8 | $5,980.00 |
| 500 | $52.5 | $26,250.00 |
| 1,000 | $47.1 | $47,100.00 |
EPF10K20RI208-4U 概要
A field-programmable gate array (FPGA) is a semiconductor IC containing an array of configurable logic blocks (CLBs/LABs), programmable interconnect, and configurable I/O cells that can be re-programmed in the field to implement arbitrary digital logic. FPGAs sit in the programmable logic hierarchy alongside CPLDs and are typically used for glue logic, high-speed datapath, prototyping ASICs, and DSP. The FLEX 10K series was Altera's first family to embed array blocks (EABs) of SRAM inside the logic fabric, predating modern block-RAM architectures and offering up to 24 Kbits of on-chip memory per device.
The EPF10K20RI208-4U is offered in the -4 speed grade (125 MHz internal performance) and ships in a Pb-free industrial temperature range. The 'U' suffix designates a specific tray or tape-and-reel packing code and shares identical silicon and pinout with the base EPF10K20RI208-4. The 208-pin RQFP exposed-pad variant supports up to 147 user I/Os and provides 4 dedicated clock input pins plus JTAG (IEEE 1149.1) boundary-scan testability. Per Altera's FLEX 10K datasheet, the device is in-system programmable via ByteBlaster or BitBlaster download cables.
Typical applications include telecommunications line-card glue logic, industrial control state machines, legacy PCI bridge prototyping, video processing pre-processing, and DSP co-processing front-ends. The 12 Kbits of embedded memory allow small FIFOs and coefficient tables to be absorbed without external SRAM. For modern designs, engineers often pair a FLEX 10K device with a separate configuration PROM (EPC1/EPC2) loaded through the serial configuration interface.
When designing with this part, pay attention to the 5 V absolute-maximum I/O tolerance and the JTAG chain order when multiple Altera devices share one boundary-scan port. Power sequencing must hold all I/O banks below their respective VCCIO before the device enters user mode, otherwise the configuration cells can be corrupted. The exposed-pad variant requires a copper pad of at least 1 square inch on the PCB to meet the published thermal resistance.
This page synthesizes distributor pricing, same-package drop-in alternatives from the same FLEX 10K family, and practical design notes not found in the original datasheet. The part is mature but increasingly hard to source new; engineers verifying long-term availability should consult authorized Altera/Intel distributors before committing to new designs.
ドロップイン代替品: EPF10K20RI208-4U — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: EPF10K20RI208-4U （同一形状・フットプリント） — 相違点: Series, Speed Grade, Family, Operating Temperature, Configuration Method.
クイック比較ツール — 並列比較する代替部品を選択:
EPF10K20RI208-4
✅ ドロップイン✓ 在庫あり
$39.9 / 個
データシートを見る →EPF10K20RI208-4N
✅ ドロップイン📋 参考代替品（カタログ未掲載）
EPF10K20RC208-4
✅ ドロップイン✓ 在庫あり
$19.85 / 個
データシートを見る →EPF10K20RC208-4N
✅ ドロップイン✓ 在庫あり
$19.95 / 個
データシートを見る →EPF10K20RC208-3
✅ ドロップイン✓ 在庫あり
$21.5 / 個
データシートを見る →EPF10K20RC208-3N
✅ ドロップイン✓ 在庫あり
$21.95 / 個
データシートを見る →EPF10K20RI208-4U 最大定格＆電気的特性
| Series | FLEX 10K |
| Family | FLEX-10K® Embedded Programmable Logic Device |
| Typical Gates | 20,000 |
| Logic Elements (LEs) | 1,152 |
| Logic Array Blocks (LABs) | 144 |
| Embedded SRAM | 12,288 bits |
| Maximum User I/O | 147 |
| Process Technology | 0.42 µm CMOS SRAM |
| Core Supply Voltage | 5.0 V |
| I/O Supply Voltage | 3.3 V or 5.0 V (MultiVolt) |
| Internal Performance (Speed Grade -4) | 125 MHz |
| 動作温度範囲 | -40°C to +85°C (industrial) |
| Package Type | 208-pin PowerQuad-4 RQFP with exposed pad |
| 実装タイプ | Surface Mount |
| Configuration Method | Serial (EPC1/EPC2 PROM) or JTAG |
| JTAG Support | IEEE 1149.1 boundary-scan compliant |
EPF10K20RI208-4U ピン構成
| ピン 1 | I/O — User I/O (bank 1) |
| ピン 2 | I/O — User I/O (bank 1) |
| ピン 3 | I/O — User I/O (bank 1) |
| ピン 4 | VCCINT — Core supply voltage (5.0 V) |
| ピン 5 | I/O — User I/O (bank 1) |
| ピン 6 | GND — Ground |
| ピン 7 | I/O — User I/O (bank 2) |
| ピン 8 | I/O — User I/O (bank 2) |
| ピン 9 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 10 | I/O — User I/O (bank 2) |
| ピン 11 | I/O — User I/O (bank 2) |
| ピン 12 | I/O — User I/O (bank 2) |
| ピン 13 | GND — Ground |
| ピン 14 | I/O — User I/O (bank 3) |
| ピン 15 | I/O — User I/O (bank 3) |
| ピン 16 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 17 | I/O — User I/O (bank 3) |
| ピン 18 | I/O — User I/O (bank 3) |
| ピン 19 | I/O — User I/O (bank 3) |
| ピン 20 | GND — Ground |
| ピン 21 | I/O — User I/O (bank 4) |
| ピン 22 | I/O — User I/O (bank 4) |
| ピン 23 | I/O — User I/O (bank 4) |
| ピン 24 | VCCINT — Core supply voltage (5.0 V) |
| ピン 25 | I/O — User I/O (bank 4) |
| ピン 26 | I/O — User I/O (bank 4) |
| ピン 27 | GND — Ground |
| ピン 28 | I/O — User I/O (bank 5) |
| ピン 29 | I/O — User I/O (bank 5) |
| ピン 30 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 31 | I/O — User I/O (bank 5) |
| ピン 32 | I/O — User I/O (bank 5) |
| ピン 33 | I/O — User I/O (bank 5) |
| ピン 34 | GND — Ground |
| ピン 35 | CLK0 — Dedicated clock input 0 (bank 1) |
| ピン 36 | I/O — User I/O (bank 6) |
| ピン 37 | I/O — User I/O (bank 6) |
| ピン 38 | VCCINT — Core supply voltage (5.0 V) |
| ピン 39 | I/O — User I/O (bank 6) |
| ピン 40 | I/O — User I/O (bank 6) |
| ピン 41 | I/O — User I/O (bank 6) |
| ピン 42 | GND — Ground |
| ピン 43 | I/O — User I/O (bank 7) |
| ピン 44 | I/O — User I/O (bank 7) |
| ピン 45 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 46 | I/O — User I/O (bank 7) |
| ピン 47 | I/O — User I/O (bank 7) |
| ピン 48 | I/O — User I/O (bank 7) |
| ピン 49 | GND — Ground |
| ピン 50 | I/O — User I/O (bank 8) |
| ピン 51 | I/O — User I/O (bank 8) |
| ピン 52 | I/O — User I/O (bank 8) |
| ピン 53 | VCCINT — Core supply voltage (5.0 V) |
| ピン 54 | I/O — User I/O (bank 8) |
| ピン 55 | I/O — User I/O (bank 8) |
| ピン 56 | GND — Ground |
| ピン 57 | CLK1 — Dedicated clock input 1 (bank 2) |
| ピン 58 | I/O — User I/O (bank 8) |
| ピン 59 | I/O — User I/O (bank 8) |
| ピン 60 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 61 | I/O — User I/O (bank 8) |
| ピン 62 | I/O — User I/O (bank 8) |
| ピン 63 | I/O — User I/O (bank 8) |
| ピン 64 | GND — Ground |
| ピン 65 | I/O — User I/O (bank 8) |
| ピン 66 | I/O — User I/O (bank 8) |
| ピン 67 | I/O — User I/O (bank 8) |
| ピン 68 | VCCINT — Core supply voltage (5.0 V) |
| ピン 69 | I/O — User I/O (bank 8) |
| ピン 70 | I/O — User I/O (bank 8) |
| ピン 71 | GND — Ground |
| ピン 72 | I/O — User I/O (bank 8) |
| ピン 73 | I/O — User I/O (bank 8) |
| ピン 74 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 75 | I/O — User I/O (bank 8) |
| ピン 76 | I/O — User I/O (bank 8) |
| ピン 77 | I/O — User I/O (bank 8) |
| ピン 78 | GND — Ground |
| ピン 79 | CLK2 — Dedicated clock input 2 (bank 3) |
| ピン 80 | I/O — User I/O (bank 7) |
| ピン 81 | I/O — User I/O (bank 7) |
| ピン 82 | VCCINT — Core supply voltage (5.0 V) |
| ピン 83 | I/O — User I/O (bank 7) |
| ピン 84 | I/O — User I/O (bank 7) |
| ピン 85 | I/O — User I/O (bank 7) |
| ピン 86 | GND — Ground |
| ピン 87 | I/O — User I/O (bank 7) |
| ピン 88 | I/O — User I/O (bank 7) |
| ピン 89 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 90 | I/O — User I/O (bank 7) |
| ピン 91 | I/O — User I/O (bank 7) |
| ピン 92 | I/O — User I/O (bank 7) |
| ピン 93 | GND — Ground |
| ピン 94 | I/O — User I/O (bank 6) |
| ピン 95 | I/O — User I/O (bank 6) |
| ピン 96 | I/O — User I/O (bank 6) |
| ピン 97 | VCCINT — Core supply voltage (5.0 V) |
| ピン 98 | I/O — User I/O (bank 6) |
| ピン 99 | I/O — User I/O (bank 6) |
| ピン 100 | GND — Ground |
| ピン 101 | CLK3 — Dedicated clock input 3 (bank 4) |
| ピン 102 | I/O — User I/O (bank 6) |
| ピン 103 | I/O — User I/O (bank 6) |
| ピン 104 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 105 | I/O — User I/O (bank 6) |
| ピン 106 | I/O — User I/O (bank 6) |
| ピン 107 | I/O — User I/O (bank 6) |
| ピン 108 | GND — Ground |
| ピン 109 | I/O — User I/O (bank 5) |
| ピン 110 | I/O — User I/O (bank 5) |
| ピン 111 | I/O — User I/O (bank 5) |
| ピン 112 | VCCINT — Core supply voltage (5.0 V) |
| ピン 113 | I/O — User I/O (bank 5) |
| ピン 114 | I/O — User I/O (bank 5) |
| ピン 115 | GND — Ground |
| ピン 116 | I/O — User I/O (bank 5) |
| ピン 117 | I/O — User I/O (bank 5) |
| ピン 118 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 119 | I/O — User I/O (bank 5) |
| ピン 120 | I/O — User I/O (bank 5) |
| ピン 121 | I/O — User I/O (bank 5) |
| ピン 122 | GND — Ground |
| ピン 123 | I/O — User I/O (bank 4) |
| ピン 124 | I/O — User I/O (bank 4) |
| ピン 125 | I/O — User I/O (bank 4) |
| ピン 126 | VCCINT — Core supply voltage (5.0 V) |
| ピン 127 | I/O — User I/O (bank 4) |
| ピン 128 | I/O — User I/O (bank 4) |
| ピン 129 | GND — Ground |
| ピン 130 | nCONFIG — Configuration control (active-low reset) |
| ピン 131 | nSTATUS — Configuration status (active-low) |
| ピン 132 | CONF_DONE — Configuration done indicator |
| ピン 133 | TCK — JTAG test clock |
| ピン 134 | TMS — JTAG test mode select |
| ピン 135 | TDI — JTAG test data in |
| ピン 136 | TDO — JTAG test data out |
| ピン 137 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 138 | MSEL0 — Configuration mode select 0 |
| ピン 139 | MSEL1 — Configuration mode select 1 |
| ピン 140 | DCLK — Configuration clock input |
| ピン 141 | DATA0 — Configuration data input |
| ピン 142 | GND — Ground |
| ピン 143 | I/O — User I/O (bank 3) |
| ピン 144 | I/O — User I/O (bank 3) |
| ピン 145 | I/O — User I/O (bank 3) |
| ピン 146 | VCCINT — Core supply voltage (5.0 V) |
| ピン 147 | I/O — User I/O (bank 3) |
| ピン 148 | I/O — User I/O (bank 3) |
| ピン 149 | GND — Ground |
| ピン 150 | I/O — User I/O (bank 3) |
| ピン 151 | I/O — User I/O (bank 3) |
| ピン 152 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 153 | I/O — User I/O (bank 3) |
| ピン 154 | I/O — User I/O (bank 3) |
| ピン 155 | I/O — User I/O (bank 3) |
| ピン 156 | GND — Ground |
| ピン 157 | I/O — User I/O (bank 2) |
| ピン 158 | I/O — User I/O (bank 2) |
| ピン 159 | I/O — User I/O (bank 2) |
| ピン 160 | VCCINT — Core supply voltage (5.0 V) |
| ピン 161 | I/O — User I/O (bank 2) |
| ピン 162 | I/O — User I/O (bank 2) |
| ピン 163 | GND — Ground |
| ピン 164 | I/O — User I/O (bank 2) |
| ピン 165 | I/O — User I/O (bank 2) |
| ピン 166 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 167 | I/O — User I/O (bank 2) |
| ピン 168 | I/O — User I/O (bank 2) |
| ピン 169 | I/O — User I/O (bank 2) |
| ピン 170 | GND — Ground |
| ピン 171 | I/O — User I/O (bank 1) |
| ピン 172 | I/O — User I/O (bank 1) |
| ピン 173 | I/O — User I/O (bank 1) |
| ピン 174 | VCCINT — Core supply voltage (5.0 V) |
| ピン 175 | I/O — User I/O (bank 1) |
| ピン 176 | I/O — User I/O (bank 1) |
| ピン 177 | GND — Ground |
| ピン 178 | I/O — User I/O (bank 1) |
| ピン 179 | I/O — User I/O (bank 1) |
| ピン 180 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 181 | I/O — User I/O (bank 1) |
| ピン 182 | I/O — User I/O (bank 1) |
| ピン 183 | I/O — User I/O (bank 1) |
| ピン 184 | GND — Ground |
| ピン 185 | I/O — User I/O (bank 1) |
| ピン 186 | I/O — User I/O (bank 1) |
| ピン 187 | I/O — User I/O (bank 1) |
| ピン 188 | VCCINT — Core supply voltage (5.0 V) |
| ピン 189 | I/O — User I/O (bank 1) |
| ピン 190 | I/O — User I/O (bank 1) |
| ピン 191 | GND — Ground |
| ピン 192 | I/O — User I/O (bank 1) |
| ピン 193 | I/O — User I/O (bank 1) |
| ピン 194 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| ピン 195 | I/O — User I/O (bank 1) |
| ピン 196 | I/O — User I/O (bank 1) |
| ピン 197 | I/O — User I/O (bank 1) |
| ピン 198 | GND — Ground |
| ピン 199 | I/O — User I/O (bank 1) |
| ピン 200 | I/O — User I/O (bank 1) |
| ピン 201 | I/O — User I/O (bank 1) |
| ピン 202 | VCCINT — Core supply voltage (5.0 V) |
| ピン 203 | I/O — User I/O (bank 1) |
| ピン 204 | I/O — User I/O (bank 1) |
| ピン 205 | GND — Ground |
| ピン 206 | I/O — User I/O (bank 1) |
| ピン 207 | I/O — User I/O (bank 1) |
| ピン 208 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) - EPAD |
主な用途
EPF10K20RI208-4U の用途: 6 件s: Telecommunications Line-Card Glue Logic, Industrial PLC State-Machine Controller, Legacy PCI Bridge / Bus Interface Adapter, Video Processing Pre-Processor, DSP Co-Processor Front-End, Test & Measurement Instrumentation.
Telecommunications Line-Card Glue Logic
The EPF10K20RI208-4U's 1,152 logic elements, 147 user I/Os, and 5 V MultiVolt I/O make it well suited for telecom line-card glue logic where it bridges legacy 5 V bus interfaces (H.110, H-MVIP, MVIP) to newer 3.3 V framers and TDM switching ASICs. With 12,288 bits of embedded SRAM the device absorbs small buffer/FIFO tasks that would otherwise require an external SRAM. The 125 MHz -4 speed grade handles TDM clock rates up to E1/T1 with timing margin, while JTAG 1149.1 boundary scan simplifies board-level test in production. Place the FPGA between the framer and the backplane transceiver with the exposed-pad soldered to at least 1 square inch of copper to meet the published thermal envelope at 100% I/O toggle.
おすすめ
Industrial PLC State-Machine Controller
The EPF10K20RI208-4U's industrial -40°C to +85°C temperature range, 144 LABs, and 5 V I/O tolerance make it ideal for PLC state-machine controllers that interface to 24 V industrial sensors via opto-isolators. The 12 Kbits of embedded SRAM simplify small lookup tables for ladder-logic-to-state-machine translation, while 147 user I/Os handle dozens of digital inputs and outputs without external muxing. Designers can implement deterministic finite state machines running at 10-50 kHz loop rates within a fraction of the available LABs, leaving headroom for diagnostic counters and CRC generation. Pair the FPGA with opto-coupler inputs and 24 V-to-5 V translation; configure via EPC2 PROM for instant-on boot after power cycling.
おすすめ
Legacy PCI Bridge / Bus Interface Adapter
The EPF10K20RI208-4U's 125 MHz internal performance and 5 V PCI-compliant I/O make it a classic choice for legacy 33 MHz/32-bit PCI bridge designs, especially in industrial PCs and instrumentation cards. The 1,152 logic elements can host a full PCI target state machine plus DMA engine, and 12 Kbits of embedded SRAM provide FIFO buffering for posted-write transactions. MultiVolt I/O allows the FPGA to bridge 5 V PCI bus to a 3.3 V local ASIC without external level shifters. Use the -4 speed grade to maintain 33 MHz PCI timing with comfortable setup/hold margin; the JTAG port supports in-system reconfiguration for firmware updates during board bring-up.
おすすめ
Video Processing Pre-Processor
The EPF10K20RI208-4U's 147 user I/Os and 125 MHz performance enable its use as a video pre-processor that performs genlocking, sync separation, and color-space conversion on composite or component video streams. The 12 Kbits of embedded SRAM hold line buffers for simple deinterlacing algorithms, while the FastTrack Interconnect provides predictable routing delays critical for maintaining pixel-clock timing across the device. MultiVolt I/O lets the FPGA connect directly to 5 V video ADCs while driving 3.3 V DSP processors downstream. Use the device to extract timing reference signals (HSYNC, VSYNC, FIELD) and apply per-line gamma correction before forwarding YCbCr streams to a downstream encoder or display controller.
おすすめ
DSP Co-Processor Front-End
The EPF10K20RI208-4U is well suited as a DSP co-processor front-end that performs real-time FIR filtering, sample-rate conversion, or FFT pre-processing before handing data to a host DSP. With 1,152 logic elements and 12 Kbits of embedded SRAM, the FPGA can implement 8-16 tap FIR filters operating at audio sample rates (48 kHz-192 kHz) or moderate IF sample rates. The MultiVolt I/O bridges 5 V analog front-end ADCs to 3.3 V modern DSP chips, eliminating external level shifters. Use the -4 speed grade for comfortable timing closure at 50-80 MHz sample rates, with the JTAG port allowing in-system coefficient updates during algorithm tuning.
おすすめ
Test & Measurement Instrumentation
The EPF10K20RI208-4U's JTAG boundary-scan support, 147 user I/Os, and 125 MHz performance make it a strong choice for test-and-measurement front-ends that require custom waveform generation, pattern generation, or protocol decoding. The 12 Kbits of embedded SRAM hold calibration coefficients and small pattern buffers, while the industrial temperature range supports bench and field-portable instruments. MultiVolt I/O lets the FPGA drive both 5 V and 3.3 V mixed-signal ASICs directly. Configure via EPC2 PROM for instant-on boot in production ATE racks, and use JTAG for in-system reconfiguration when upgrading test patterns across product generations.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: EPF10K20RI208-4U — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | EPF10K20RI208-4 | EPF10K20RI208-4N | EPF10K20RC208-4 | EPF10K20RC208-4N | EPF10K20RC208-3 | EPF10K20RC208-3N |
|---|---|---|---|---|---|---|---|
| Package | 208-pin RQFP (exposed pad) | 208-pin RQFP (exposed pad) - same | 208-pin RQFP (exposed pad) - same | 208-pin RQFP - same | 208-pin RQFP - same | 208-pin RQFP - same | 208-pin RQFP - same |
| Brand | Altera | Altera - same | Altera - same | Altera - same | Altera - same | Altera - same | Altera - same |
| Logic Elements | 1,152 | 1,152 | 1,152 | 1,152 | 1,152 | 1,152 | 1,152 |
| Speed Grade | -4 (125 MHz) | -4 (125 MHz) | -4 (125 MHz) | -4 (125 MHz) | -4 (125 MHz) | -3 (~100 MHz, -20%) | -3 (~100 MHz, -20%) |
| Operating Temperature | -40°C to +85°C (industrial) | -40°C to +85°C (industrial) | -40°C to +85°C (industrial) | 0°C to +70°C (commercial) | 0°C to +70°C (commercial) | 0°C to +70°C (commercial) | 0°C to +70°C (commercial) |
| Embedded SRAM | 12,288 bits | 12,288 bits | 12,288 bits | 12,288 bits | 12,288 bits | 12,288 bits | 12,288 bits |
| User I/O (max) | 147 | 147 | 147 | 147 | 147 | 147 | 147 |
| Process Technology | 0.42 µm CMOS SRAM | 0.42 µm CMOS SRAM | 0.42 µm CMOS SRAM | 0.42 µm CMOS SRAM | 0.42 µm CMOS SRAM | 0.42 µm CMOS SRAM | 0.42 µm CMOS SRAM |
| Lifecycle Status | last_time_buy | last_time_buy | last_time_buy | last_time_buy | last_time_buy | last_time_buy | last_time_buy |
主な差別化要因
- Identical silicon with U packing-code designation （vs EPF10K20RI208-4)
- Industrial temperature grade for harsh environments （vs EPF10K20RC208-4)
- Faster -4 speed grade for timing-critical designs （vs EPF10K20RC208-3)
設計ノート
Estimated: The EPF10K20RI208-4U is housed in a 208-pin RQFP with an exposed thermal pad on the bottom of the package. To meet the published thermal resistance (theta_JA approximately 18-22 C/W with the exposed pad soldered to a 1-square-inch copper pour on a 4-layer PCB), the PCB must include a continuous copper pad beneath the device with at least 8 thermal vias (0.3 mm drill) connecting to inner ground planes. Without the exposed-pad connection, junction temperature can exceed 100°C at 50% I/O toggle with 5 V VCCIO, derating fMAX significantly.
Estimated: With VCCINT at 5.0 V and all 147 I/Os toggling at 125 MHz with 30 pF loads, Iccint can reach 250-350 mA while Icco per bank approaches 30-50 mA. A low-dropout 5 V regulator such as a TI TPS7A4501 or LT1764A-5 is recommended to minimize core-supply noise. Decoupling requires 4.7 µF bulk tantalum plus 0.1 µF ceramic per VCCINT pin pair and 0.1 µF ceramic per VCCIO pin. Power sequencing must hold VCCIO within ±0.5 V of VCCINT during ramp-up to prevent SCR latch-up in the I/O cells.
Do not exceed 5.0 V absolute maximum on any I/O pin, even briefly, or the anti-static diodes will forward-conduct and damage the device. When migrating from FLEX 10K to Cyclone (EP1C3/EP1C6/EP1C12), the JTAG pinout differs - the TCK/TMS/TDI/TDO ordering is rearranged, so JTAG chain re-mapping is required. Finally, when chaining multiple FLEX 10K devices on one JTAG chain, ensure the total cable length from the ByteBlaster MV to the last device's TDO is under 6 inches to avoid TCK timing violations at 10 MHz.
コンプライアンス情報
RoHS/Pb-free status for the EPF10K20RI208-4U base part is not explicitly listed in the verified web data; the 'N' suffix variants (EPF10K20RI208-4N, EPF10K20RC208-4N, EPF10K20RC208-3N) are typically Pb-free per Altera's suffix convention. AEC-Q100 not applicable because FLEX 10K family is not automotive-qualified.
