EPF10K20RI208-4U - FLEX 10K FPGA, 20K Gates, 208-Pin RQFP | Altera
MPN: EPF10K20RI208-4U ⚠ Waktu Beli TerakhirEPF10K20RI208-4U Ringkasan
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.
Alternatif penggantian untuk EPF10K20RI208-4U — 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 EPF10K20RI208-4U (sama faktor bentuk dan footprint) — berbeda di dalam Series, Speed Grade, Family, Operating Temperature, Configuration Method.
EPF10K20RI208-4
✅ Drop-InKontak untuk harga
Lihat Datasheet →EPF10K20RI208-4N
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
EPF10K20RC208-4
✅ Drop-InKontak untuk harga
Lihat Datasheet →EPF10K20RC208-4N
✅ Drop-InKontak untuk harga
Lihat Datasheet →EPF10K20RC208-3
✅ Drop-InKontak untuk harga
Lihat Datasheet →EPF10K20RC208-3N
✅ Drop-InKontak untuk harga
Lihat Datasheet →EPF10K20RI208-4U Rating Maksimal & Karakteristik Listrik
| 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 |
| Rentang Suhu Kerja | -40°C to +85°C (industrial) |
| Package Type | 208-pin PowerQuad-4 RQFP with exposed pad |
| Tipe Mounting | Surface Mount |
| Configuration Method | Serial (EPC1/EPC2 PROM) or JTAG |
| JTAG Support | IEEE 1149.1 boundary-scan compliant |
Konfigurasi Pin EPF10K20RI208-4U
| 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 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 5 | I/O — User I/O (bank 1) |
| Pin produk 6 | GND — Ground |
| Pin produk 7 | I/O — User I/O (bank 2) |
| Pin produk 8 | I/O — User I/O (bank 2) |
| Pin produk 9 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 10 | I/O — User I/O (bank 2) |
| Pin produk 11 | I/O — User I/O (bank 2) |
| Pin produk 12 | I/O — User I/O (bank 2) |
| Pin produk 13 | GND — Ground |
| Pin produk 14 | I/O — User I/O (bank 3) |
| Pin produk 15 | I/O — User I/O (bank 3) |
| Pin produk 16 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 17 | I/O — User I/O (bank 3) |
| Pin produk 18 | I/O — User I/O (bank 3) |
| Pin produk 19 | I/O — User I/O (bank 3) |
| Pin produk 20 | GND — Ground |
| Pin produk 21 | I/O — User I/O (bank 4) |
| Pin produk 22 | I/O — User I/O (bank 4) |
| Pin produk 23 | I/O — User I/O (bank 4) |
| Pin produk 24 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 25 | I/O — User I/O (bank 4) |
| Pin produk 26 | I/O — User I/O (bank 4) |
| Pin produk 27 | GND — Ground |
| Pin produk 28 | I/O — User I/O (bank 5) |
| Pin produk 29 | I/O — User I/O (bank 5) |
| Pin produk 30 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 31 | I/O — User I/O (bank 5) |
| Pin produk 32 | I/O — User I/O (bank 5) |
| Pin produk 33 | I/O — User I/O (bank 5) |
| Pin produk 34 | GND — Ground |
| Pin produk 35 | CLK0 — Dedicated clock input 0 (bank 1) |
| Pin produk 36 | I/O — User I/O (bank 6) |
| Pin produk 37 | I/O — User I/O (bank 6) |
| Pin produk 38 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 39 | I/O — User I/O (bank 6) |
| Pin produk 40 | I/O — User I/O (bank 6) |
| Pin produk 41 | I/O — User I/O (bank 6) |
| Pin produk 42 | GND — Ground |
| Pin produk 43 | I/O — User I/O (bank 7) |
| Pin produk 44 | I/O — User I/O (bank 7) |
| Pin produk 45 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 46 | I/O — User I/O (bank 7) |
| Pin produk 47 | I/O — User I/O (bank 7) |
| Pin produk 48 | I/O — User I/O (bank 7) |
| Pin produk 49 | GND — Ground |
| Pin produk 50 | I/O — User I/O (bank 8) |
| Pin produk 51 | I/O — User I/O (bank 8) |
| Pin produk 52 | I/O — User I/O (bank 8) |
| Pin produk 53 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 54 | I/O — User I/O (bank 8) |
| Pin produk 55 | I/O — User I/O (bank 8) |
| Pin produk 56 | GND — Ground |
| Pin produk 57 | CLK1 — Dedicated clock input 1 (bank 2) |
| Pin produk 58 | I/O — User I/O (bank 8) |
| Pin produk 59 | I/O — User I/O (bank 8) |
| Pin produk 60 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 61 | I/O — User I/O (bank 8) |
| Pin produk 62 | I/O — User I/O (bank 8) |
| Pin produk 63 | I/O — User I/O (bank 8) |
| Pin produk 64 | GND — Ground |
| Pin produk 65 | I/O — User I/O (bank 8) |
| Pin produk 66 | I/O — User I/O (bank 8) |
| Pin produk 67 | I/O — User I/O (bank 8) |
| Pin produk 68 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 69 | I/O — User I/O (bank 8) |
| Pin produk 70 | I/O — User I/O (bank 8) |
| Pin produk 71 | GND — Ground |
| Pin produk 72 | I/O — User I/O (bank 8) |
| Pin produk 73 | I/O — User I/O (bank 8) |
| Pin produk 74 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 75 | I/O — User I/O (bank 8) |
| Pin produk 76 | I/O — User I/O (bank 8) |
| Pin produk 77 | I/O — User I/O (bank 8) |
| Pin produk 78 | GND — Ground |
| Pin produk 79 | CLK2 — Dedicated clock input 2 (bank 3) |
| Pin produk 80 | I/O — User I/O (bank 7) |
| Pin produk 81 | I/O — User I/O (bank 7) |
| Pin produk 82 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 83 | I/O — User I/O (bank 7) |
| Pin produk 84 | I/O — User I/O (bank 7) |
| Pin produk 85 | I/O — User I/O (bank 7) |
| Pin produk 86 | GND — Ground |
| Pin produk 87 | I/O — User I/O (bank 7) |
| Pin produk 88 | I/O — User I/O (bank 7) |
| Pin produk 89 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 90 | I/O — User I/O (bank 7) |
| Pin produk 91 | I/O — User I/O (bank 7) |
| Pin produk 92 | I/O — User I/O (bank 7) |
| Pin produk 93 | GND — Ground |
| Pin produk 94 | I/O — User I/O (bank 6) |
| Pin produk 95 | I/O — User I/O (bank 6) |
| Pin produk 96 | I/O — User I/O (bank 6) |
| Pin produk 97 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 98 | I/O — User I/O (bank 6) |
| Pin produk 99 | I/O — User I/O (bank 6) |
| Pin produk 100 | GND — Ground |
| Pin produk 101 | CLK3 — Dedicated clock input 3 (bank 4) |
| Pin produk 102 | I/O — User I/O (bank 6) |
| Pin produk 103 | I/O — User I/O (bank 6) |
| Pin produk 104 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 105 | I/O — User I/O (bank 6) |
| Pin produk 106 | I/O — User I/O (bank 6) |
| Pin produk 107 | I/O — User I/O (bank 6) |
| Pin produk 108 | GND — Ground |
| Pin produk 109 | I/O — User I/O (bank 5) |
| Pin produk 110 | I/O — User I/O (bank 5) |
| Pin produk 111 | I/O — User I/O (bank 5) |
| Pin produk 112 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 113 | I/O — User I/O (bank 5) |
| Pin produk 114 | I/O — User I/O (bank 5) |
| Pin produk 115 | GND — Ground |
| Pin produk 116 | I/O — User I/O (bank 5) |
| Pin produk 117 | I/O — User I/O (bank 5) |
| Pin produk 118 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 119 | I/O — User I/O (bank 5) |
| Pin produk 120 | I/O — User I/O (bank 5) |
| Pin produk 121 | I/O — User I/O (bank 5) |
| Pin produk 122 | GND — Ground |
| Pin produk 123 | I/O — User I/O (bank 4) |
| Pin produk 124 | I/O — User I/O (bank 4) |
| Pin produk 125 | I/O — User I/O (bank 4) |
| Pin produk 126 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 127 | I/O — User I/O (bank 4) |
| Pin produk 128 | I/O — User I/O (bank 4) |
| Pin produk 129 | GND — Ground |
| Pin produk 130 | nCONFIG — Configuration control (active-low reset) |
| Pin produk 131 | nSTATUS — Configuration status (active-low) |
| Pin produk 132 | CONF_DONE — Configuration done indicator |
| Pin produk 133 | TCK — JTAG test clock |
| Pin produk 134 | TMS — JTAG test mode select |
| Pin produk 135 | TDI — JTAG test data in |
| Pin produk 136 | TDO — JTAG test data out |
| Pin produk 137 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 138 | MSEL0 — Configuration mode select 0 |
| Pin produk 139 | MSEL1 — Configuration mode select 1 |
| Pin produk 140 | DCLK — Configuration clock input |
| Pin produk 141 | DATA0 — Configuration data input |
| Pin produk 142 | GND — Ground |
| Pin produk 143 | I/O — User I/O (bank 3) |
| Pin produk 144 | I/O — User I/O (bank 3) |
| Pin produk 145 | I/O — User I/O (bank 3) |
| Pin produk 146 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 147 | I/O — User I/O (bank 3) |
| Pin produk 148 | I/O — User I/O (bank 3) |
| Pin produk 149 | GND — Ground |
| Pin produk 150 | I/O — User I/O (bank 3) |
| Pin produk 151 | I/O — User I/O (bank 3) |
| Pin produk 152 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 153 | I/O — User I/O (bank 3) |
| Pin produk 154 | I/O — User I/O (bank 3) |
| Pin produk 155 | I/O — User I/O (bank 3) |
| Pin produk 156 | GND — Ground |
| Pin produk 157 | I/O — User I/O (bank 2) |
| Pin produk 158 | I/O — User I/O (bank 2) |
| Pin produk 159 | I/O — User I/O (bank 2) |
| Pin produk 160 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 161 | I/O — User I/O (bank 2) |
| Pin produk 162 | I/O — User I/O (bank 2) |
| Pin produk 163 | GND — Ground |
| Pin produk 164 | I/O — User I/O (bank 2) |
| Pin produk 165 | I/O — User I/O (bank 2) |
| Pin produk 166 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 167 | I/O — User I/O (bank 2) |
| Pin produk 168 | I/O — User I/O (bank 2) |
| Pin produk 169 | I/O — User I/O (bank 2) |
| Pin produk 170 | GND — Ground |
| Pin produk 171 | I/O — User I/O (bank 1) |
| Pin produk 172 | I/O — User I/O (bank 1) |
| Pin produk 173 | I/O — User I/O (bank 1) |
| Pin produk 174 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 175 | I/O — User I/O (bank 1) |
| Pin produk 176 | I/O — User I/O (bank 1) |
| Pin produk 177 | GND — Ground |
| Pin produk 178 | I/O — User I/O (bank 1) |
| Pin produk 179 | I/O — User I/O (bank 1) |
| Pin produk 180 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 181 | I/O — User I/O (bank 1) |
| Pin produk 182 | I/O — User I/O (bank 1) |
| Pin produk 183 | I/O — User I/O (bank 1) |
| Pin produk 184 | GND — Ground |
| Pin produk 185 | I/O — User I/O (bank 1) |
| Pin produk 186 | I/O — User I/O (bank 1) |
| Pin produk 187 | I/O — User I/O (bank 1) |
| Pin produk 188 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 189 | I/O — User I/O (bank 1) |
| Pin produk 190 | I/O — User I/O (bank 1) |
| Pin produk 191 | GND — Ground |
| Pin produk 192 | I/O — User I/O (bank 1) |
| Pin produk 193 | I/O — User I/O (bank 1) |
| Pin produk 194 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) |
| Pin produk 195 | I/O — User I/O (bank 1) |
| Pin produk 196 | I/O — User I/O (bank 1) |
| Pin produk 197 | I/O — User I/O (bank 1) |
| Pin produk 198 | GND — Ground |
| Pin produk 199 | I/O — User I/O (bank 1) |
| Pin produk 200 | I/O — User I/O (bank 1) |
| Pin produk 201 | I/O — User I/O (bank 1) |
| Pin produk 202 | VCCINT — Core supply voltage (5.0 V) |
| Pin produk 203 | I/O — User I/O (bank 1) |
| Pin produk 204 | I/O — User I/O (bank 1) |
| Pin produk 205 | GND — Ground |
| Pin produk 206 | I/O — User I/O (bank 1) |
| Pin produk 207 | I/O — User I/O (bank 1) |
| Pin produk 208 | VCCIO — I/O supply voltage (3.3 V or 5.0 V) - EPAD |
Aplikasi Umum
EPF10K20RI208-4U cocok untuk 6 aplikasis: 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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk EPF10K20RI208-4U — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | 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 |
Diferensiator Kunci
- Identical silicon with U packing-code designation (vsEPF10K20RI208-4)
- Industrial temperature grade for harsh environments (vsEPF10K20RC208-4)
- Faster -4 speed grade for timing-critical designs (vsEPF10K20RC208-3)
Catatan Desain
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.
Informasi Konformitas
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.
