EPM7256SQC208-10 - MAX 7000S CPLD, 256 Macrocells, 10ns, 208-PQFP | Intel
MPN： EPM7256SQC208-10 ✗ 停產EPM7256SQC208-10 概覽
A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic device that combines multiple PAL/GAL-like macrocell blocks with a central interconnect matrix. CPLDs sit in the programmable logic hierarchy between simple SPLDs (single PLDs such as PAL/GAL) and large FPGAs (Field-Programmable Gate Arrays), providing deterministic timing, instant-on operation, and high-logic-density glue logic in a single chip. The MAX 7000S family uses a second-generation MAX architecture with EEPROM process technology, giving engineers in-system programmability (ISP) and 100% tested stuck-fault coverage.
The EPM7256SQC208-10 is built around 16 Logic Array Blocks (LABs), each containing 16 macrocells, and delivers up to 5,000 usable gates. Key features include a 10 ns pin-to-pin delay (tPD), counter speeds up to 175.4 MHz, 3.3V or 5V tolerant I/O (with 5V core on the standard -10 variant), in-system programmability via IEEE 1149.1 JTAG, and PCI-SIG compliant I/O for bus interface designs. The 164 I/O pins and JTAG support make it well-suited for bus bridging, address decoding, and state-machine control.
The device implements a programmable interconnect matrix (PIA) that routes all LAB outputs to any LAB input, ensuring predictable timing and removing the routing congestion seen in older SPLD architectures. The MAX 7000S architecture also supports programmable power-saving modes per macrocell, which reduces quiescent current when blocks are idle.
Typical applications include telecommunications glue logic, industrial control interface bridging, address decoding and bus arbitration in embedded systems, PCI bus interface glue, and replacement of multiple discrete SSI/MSI logic packages. The combination of non-volatile storage, instant-on, and deterministic timing makes it attractive for safety-critical boot logic.
A key design tip: the -10 speed grade refers to the slowest of the MAX 7000S speed grades (-6, -7, -10). When designing, ensure that the timing budget (clock period minus tCO, tSU) accommodates the 10 ns propagation delay and that PCI-compliant I/O is only used when the design meets the PCI Local Bus Specification 2.2 timing requirements.
This page synthesizes distributor pricing, in-system programmable drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet.
直接替換替代品，適用於 EPM7256SQC208-10 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： EPM7256SQC208-10 （相同外形與佔位） — 差異在於 Package, RoHS Status, Operating Temperature, Speed Grade, Family.
EPM7256AEQC208-10N
✅ 直接替換📋 參考替代品（不在目錄中）
EPM7256AQI208-10
✅ 直接替換聯絡詢價
查看資料表 →EPM7256AEQI208-7N
✅ 直接替換聯絡詢價
查看資料表 →EPM7256AEQC208-5N
✅ 直接替換聯絡詢價
查看資料表 →EPM7256BQC208-7
✅ 直接替換聯絡詢價
查看資料表 →EPM7256SQC208-10 最大額定值與電氣特性
| Series | MAX 7000S |
| Device Type | CPLD (Complex Programmable Logic Device) |
| Macrocells | 256 |
| Logic Array Blocks (LABs) | 16 |
| Usable Gates | 5,000 |
| Number of I/O Pins | 164 |
| Propagation Delay (tPD) | 10 ns |
| Counter Speed (fCNT) | Up to 175.4 MHz |
| 封裝 | 208-pin PQFP (SQC208) |
| 安裝類型 | Surface Mount |
| Programmable Technology | EEPROM (in-system programmable) |
| JTAG Support (IEEE 1149.1) | Yes |
| PCI Compliance | PCI Local Bus Specification 2.2 compliant |
| 工作溫度 | 0C to +70C (commercial) |
| MSL 等級 | 3 (168 hours) |
EPM7256SQC208-10 腳位配置
| 腳位 1 | I/O — User I/O pin |
| 腳位 2 | I/O — User I/O pin |
| 腳位 3 | I/O — User I/O pin |
| 腳位 4 | I/O — User I/O pin |
| 腳位 5 | I/O — User I/O pin |
| 腳位 6 | I/O — User I/O pin |
| 腳位 7 | VCC — 5V supply voltage |
| 腳位 8 | I/O — User I/O pin |
| 腳位 9 | I/O — User I/O pin |
| 腳位 10 | I/O — User I/O pin |
| 腳位 11 | GND — Ground |
| 腳位 12 | I/O — User I/O pin |
| 腳位 13 | I/O — User I/O pin |
| 腳位 14 | I/O — User I/O pin |
| 腳位 15 | I/O — User I/O pin |
| 腳位 16 | I/O — User I/O pin |
| 腳位 17 | I/O — User I/O pin |
| 腳位 18 | I/O — User I/O pin |
| 腳位 19 | TDI — JTAG Test Data In |
| 腳位 20 | TMS — JTAG Test Mode Select |
| 腳位 21 | TCK — JTAG Test Clock |
| 腳位 22 | TDO — JTAG Test Data Out |
| 腳位 23 | I/O — User I/O pin |
| 腳位 24 | I/O — User I/O pin |
| 腳位 25 | I/O — User I/O pin |
| 腳位 26 | I/O — User I/O pin |
| 腳位 27 | I/O — User I/O pin |
| 腳位 28 | I/O — User I/O pin |
| 腳位 29 | VCC — 5V supply voltage |
| 腳位 30 | I/O — User I/O pin |
| 腳位 31 | I/O — User I/O pin |
| 腳位 32 | I/O — User I/O pin |
| 腳位 33 | I/O — User I/O pin |
| 腳位 34 | I/O — User I/O pin |
| 腳位 35 | GND — Ground |
| 腳位 36 | I/O — User I/O pin |
| 腳位 37 | I/O — User I/O pin |
| 腳位 38 | I/O — User I/O pin |
| 腳位 39 | I/O — User I/O pin |
| 腳位 40 | I/O — User I/O pin |
| 腳位 41 | I/O — User I/O pin |
| 腳位 42 | I/O — User I/O pin |
| 腳位 43 | I/O — User I/O pin |
| 腳位 44 | I/O — User I/O pin |
| 腳位 45 | I/O — User I/O pin |
| 腳位 46 | I/O — User I/O pin |
| 腳位 47 | VCC — 5V supply voltage |
| 腳位 48 | I/O — User I/O pin |
| 腳位 49 | I/O — User I/O pin |
| 腳位 50 | I/O — User I/O pin |
| 腳位 51 | I/O — User I/O pin |
| 腳位 52 | I/O — User I/O pin |
| 腳位 53 | GND — Ground |
| 腳位 54 | I/O — User I/O pin |
| 腳位 55 | I/O — User I/O pin |
| 腳位 56 | I/O — User I/O pin |
| 腳位 57 | I/O — User I/O pin |
| 腳位 58 | I/O — User I/O pin |
| 腳位 59 | I/O — User I/O pin |
| 腳位 60 | I/O — User I/O pin |
| 腳位 61 | I/O — User I/O pin |
| 腳位 62 | I/O — User I/O pin |
| 腳位 63 | I/O — User I/O pin |
| 腳位 64 | I/O — User I/O pin |
| 腳位 65 | I/O — User I/O pin |
| 腳位 66 | I/O — User I/O pin |
| 腳位 67 | I/O — User I/O pin |
| 腳位 68 | I/O — User I/O pin |
| 腳位 69 | I/O — User I/O pin |
| 腳位 70 | I/O — User I/O pin |
| 腳位 71 | VCC — 5V supply voltage |
| 腳位 72 | I/O — User I/O pin |
| 腳位 73 | I/O — User I/O pin |
| 腳位 74 | I/O — User I/O pin |
| 腳位 75 | GND — Ground |
| 腳位 76 | I/O — User I/O pin |
| 腳位 77 | I/O — User I/O pin |
| 腳位 78 | I/O — User I/O pin |
| 腳位 79 | I/O — User I/O pin |
| 腳位 80 | I/O — User I/O pin |
| 腳位 81 | I/O — User I/O pin |
| 腳位 82 | I/O — User I/O pin |
| 腳位 83 | I/O — User I/O pin |
| 腳位 84 | I/O — User I/O pin |
| 腳位 85 | I/O — User I/O pin |
| 腳位 86 | I/O — User I/O pin |
| 腳位 87 | I/O — User I/O pin |
| 腳位 88 | I/O — User I/O pin |
| 腳位 89 | I/O — User I/O pin |
| 腳位 90 | I/O — User I/O pin |
| 腳位 91 | I/O — User I/O pin |
| 腳位 92 | I/O — User I/O pin |
| 腳位 93 | VCC — 5V supply voltage |
| 腳位 94 | I/O — User I/O pin |
| 腳位 95 | I/O — User I/O pin |
| 腳位 96 | I/O — User I/O pin |
| 腳位 97 | GND — Ground |
| 腳位 98 | I/O — User I/O pin |
| 腳位 99 | I/O — User I/O pin |
| 腳位 100 | I/O — User I/O pin |
| 腳位 101 | I/O — User I/O pin |
| 腳位 102 | I/O — User I/O pin |
| 腳位 103 | I/O — User I/O pin |
| 腳位 104 | I/O — User I/O pin |
| 腳位 105 | I/O — User I/O pin |
| 腳位 106 | I/O — User I/O pin |
| 腳位 107 | I/O — User I/O pin |
| 腳位 108 | I/O — User I/O pin |
| 腳位 109 | I/O — User I/O pin |
| 腳位 110 | I/O — User I/O pin |
| 腳位 111 | I/O — User I/O pin |
| 腳位 112 | I/O — User I/O pin |
| 腳位 113 | I/O — User I/O pin |
| 腳位 114 | I/O — User I/O pin |
| 腳位 115 | VCC — 5V supply voltage |
| 腳位 116 | I/O — User I/O pin |
| 腳位 117 | I/O — User I/O pin |
| 腳位 118 | I/O — User I/O pin |
| 腳位 119 | GND — Ground |
| 腳位 120 | I/O — User I/O pin |
| 腳位 121 | I/O — User I/O pin |
| 腳位 122 | I/O — User I/O pin |
| 腳位 123 | I/O — User I/O pin |
| 腳位 124 | I/O — User I/O pin |
| 腳位 125 | I/O — User I/O pin |
| 腳位 126 | I/O — User I/O pin |
| 腳位 127 | I/O — User I/O pin |
| 腳位 128 | I/O — User I/O pin |
| 腳位 129 | I/O — User I/O pin |
| 腳位 130 | I/O — User I/O pin |
| 腳位 131 | I/O — User I/O pin |
| 腳位 132 | I/O — User I/O pin |
| 腳位 133 | I/O — User I/O pin |
| 腳位 134 | I/O — User I/O pin |
| 腳位 135 | I/O — User I/O pin |
| 腳位 136 | I/O — User I/O pin |
| 腳位 137 | VCC — 5V supply voltage |
| 腳位 138 | I/O — User I/O pin |
| 腳位 139 | I/O — User I/O pin |
| 腳位 140 | I/O — User I/O pin |
| 腳位 141 | GND — Ground |
| 腳位 142 | I/O — User I/O pin |
| 腳位 143 | I/O — User I/O pin |
| 腳位 144 | I/O — User I/O pin |
| 腳位 145 | I/O — User I/O pin |
| 腳位 146 | I/O — User I/O pin |
| 腳位 147 | I/O — User I/O pin |
| 腳位 148 | I/O — User I/O pin |
| 腳位 149 | I/O — User I/O pin |
| 腳位 150 | I/O — User I/O pin |
| 腳位 151 | I/O — User I/O pin |
| 腳位 152 | I/O — User I/O pin |
| 腳位 153 | I/O — User I/O pin |
| 腳位 154 | I/O — User I/O pin |
| 腳位 155 | I/O — User I/O pin |
| 腳位 156 | I/O — User I/O pin |
| 腳位 157 | I/O — User I/O pin |
| 腳位 158 | I/O — User I/O pin |
| 腳位 159 | VCC — 5V supply voltage |
| 腳位 160 | I/O — User I/O pin |
| 腳位 161 | I/O — User I/O pin |
| 腳位 162 | I/O — User I/O pin |
| 腳位 163 | GND — Ground |
| 腳位 164 | I/O — User I/O pin |
| 腳位 165 | I/O — User I/O pin |
| 腳位 166 | I/O — User I/O pin |
| 腳位 167 | I/O — User I/O pin |
| 腳位 168 | I/O — User I/O pin |
| 腳位 169 | I/O — User I/O pin |
| 腳位 170 | I/O — User I/O pin |
| 腳位 171 | I/O — User I/O pin |
| 腳位 172 | I/O — User I/O pin |
| 腳位 173 | I/O — User I/O pin |
| 腳位 174 | I/O — User I/O pin |
| 腳位 175 | I/O — User I/O pin |
| 腳位 176 | I/O — User I/O pin |
| 腳位 177 | I/O — User I/O pin |
| 腳位 178 | I/O — User I/O pin |
| 腳位 179 | I/O — User I/O pin |
| 腳位 180 | I/O — User I/O pin |
| 腳位 181 | I/O — User I/O pin |
| 腳位 182 | I/O — User I/O pin |
| 腳位 183 | I/O — User I/O pin |
| 腳位 184 | I/O — User I/O pin |
| 腳位 185 | I/O — User I/O pin |
| 腳位 186 | I/O — User I/O pin |
| 腳位 187 | I/O — User I/O pin |
| 腳位 188 | I/O — User I/O pin |
| 腳位 189 | I/O — User I/O pin |
| 腳位 190 | I/O — User I/O pin |
| 腳位 191 | I/O — User I/O pin |
| 腳位 192 | I/O — User I/O pin |
| 腳位 193 | I/O — User I/O pin |
| 腳位 194 | I/O — User I/O pin |
| 腳位 195 | I/O — User I/O pin |
| 腳位 196 | I/O — User I/O pin |
| 腳位 197 | I/O — User I/O pin |
| 腳位 198 | I/O — User I/O pin |
| 腳位 199 | I/O — User I/O pin |
| 腳位 200 | I/O — User I/O pin |
| 腳位 201 | I/O — User I/O pin |
| 腳位 202 | I/O — User I/O pin |
| 腳位 203 | I/O — User I/O pin |
| 腳位 204 | I/O — User I/O pin |
| 腳位 205 | I/O — User I/O pin |
| 腳位 206 | I/O — User I/O pin |
| 腳位 207 | I/O — User I/O pin |
| 腳位 208 | I/O — User I/O pin |
典型應用
EPM7256SQC208-10 適用於 6 應用s: Telecommunications Glue Logic, Industrial Control Interface Bridging, PCI Bus Address Decoding and Arbitration, Embedded System Glue Logic, Legacy Logic Replacement and Board Modernization, State Machine and Control Logic.
Telecommunications Glue Logic
The EPM7256SQC208-10 excels in telecom glue logic where deterministic timing, instant-on operation, and high I/O density are required. Its 256 macrocells and 164 I/O easily replace dozens of SSI/MSI logic packages for backplane address decoding, bus arbitration, and protocol conversion in central-office line cards. The 10 ns tPD suits telecom backplanes running at frequencies up to 100 MHz, and the 5V core (standard grade) drives legacy backplane drivers directly. In-system programmability via JTAG enables field upgrades and design iteration without removing components.
推薦
Industrial Control Interface Bridging
In factory automation, the EPM7256SQC208-10 bridges between legacy 5V PLCs, modern 3.3V microcontrollers, and fieldbus networks. Its 5V-tolerant I/O tolerates real-world industrial signal levels while the 256 macrocells implement multiple protocol converters (Modbus, Profibus, CAN glue logic) on one chip. Industrial-grade variants (EPM7256AQI208-10) extend the operating range to -40C to +85C for harsh factory floors. The EEPROM non-volatile storage means the device powers up instantly into a known-good state, critical for safety circuits.
推薦
PCI Bus Address Decoding and Arbitration
The EPM7256SQC208-10 is explicitly PCI Local Bus Specification 2.2 compliant, making it ideal for motherboard address decoding, bus arbitration, and chip-select generation. The 164 I/O handle multiple PCI slots, and the 5 ns set-up time at 10 ns delay fits the 33 MHz PCI bus timing budget with margin. Replacing discrete 74F/74AS logic with this CPLD reduces board area, improves testability via JTAG, and provides a single component to modify when the address map changes.
推薦
Embedded System Glue Logic
Embedded designs using microprocessors, DSPs, or FPGAs often need glue logic for chip-select generation, wait-state insertion, reset distribution, and interrupt prioritization. The EPM7256SQC208-10 absorbs all this glue into one non-volatile device, replacing 5-10 discrete logic ICs. Its 5,000 usable gates handle full address decoding for 32-bit microprocessors plus peripheral control, and JTAG ISP allows the same board to ship with different address maps by reprogramming the CPLD.
推薦
Legacy Logic Replacement and Board Modernization
Many long-lifecycle products (military, aerospace, medical) cannot be redesigned, but their 74F/74AS logic is going obsolete. The EPM7256SQC208-10 implements the equivalent of 30-50 SSI/MSI packages in one chip, shrinking the BOM, reducing power, and adding testability. The 208-pin PQFP package accommodates designs with large I/O counts. Reprogramming the EEPROM allows engineering change orders (ECOs) without board respins.
推薦
State Machine and Control Logic
Complex state machines, sequencers, and pulse-width modulators fit naturally in the 256 macrocells of the EPM7256SQC208-10. The 175.4 MHz counter speed enables precise timing generation, and the deterministic tPD of 10 ns gives predictable state-transition timing without FPGA synthesis uncertainty. The 164 I/O accommodate multiple encoder/decoder interfaces, and JTAG boundary-scan testing verifies connections on assembled boards before functional test.
推薦
推薦產品摘要
工程參考資料，適用於 EPM7256SQC208-10 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | EPM7256AEQC208-10N | EPM7256AQI208-10 | EPM7256AEQI208-7N | EPM7256AEQC208-5N | EPM7256BQC208-7 |
|---|---|---|---|---|---|---|
| Package | 208-pin PQFP (SQC208) | 208-pin PQFP (SQC208) - same | 208-pin PQFP (SQC208) - same | 208-pin PQFP (SQC208) - same | 208-pin PQFP (SQC208) - same | 208-pin PQFP (SQC208) - same |
| Brand | Intel | Intel | Intel | Intel | Intel | Intel |
| Series | MAX 7000S | MAX 7000S (AEC revision) | MAX 7000S | MAX 7000S (AEC revision) | MAX 7000S (AEC revision) | MAX 7000B |
| Macrocells | 256 | 256 | 256 | 256 | 256 | 256 |
| Propagation Delay (tPD) | 10 ns | 10 ns | 10 ns | 7 ns (faster) | 5 ns (fastest) | 7 ns |
| Temperature Grade | Commercial (0C to +70C) | Commercial | Industrial (-40C to +85C) | Industrial | Commercial | Commercial |
| Lead-Free / RoHS | No (original, non-N suffix) | Yes (N suffix) | No | Yes (N suffix) | Yes (N suffix) | No |
| User I/O Pins | 164 | 164 | 164 | 164 | 164 | 164 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
主要差異化特點
- Drop-in lead-free alternative with same die footprint (對比EPM7256AEQC208-10N)
- Industrial-temperature option available in same package (對比EPM7256AQI208-10)
- Faster speed-grade drop-ins available (對比EPM7256AEQI208-7N)
設計說明
The EPM7256SQC208-10 is a 5V-core device on the standard (non-AEC) revision. Provide a clean 5V VCC rail and add 0.1uF ceramic decoupling capacitors near every VCC pin (pins 7, 29, 47, 71, 93, 115, 137, 159) plus a bulk 10uF tantalum or electrolytic cap near the device. The AEC revision (EPM7256AEQC208-10N) supports 3.3V core operation; do not swap a standard -10 with an AEC variant without verifying the I/O voltage compatibility.
Route JTAG signals (TDI, TMS, TCK, TDO on pins 19-22) away from high-speed clocks and switching signals to avoid programming interference. Use a 4-wire JTAG header on the board for in-system programming during development. Add 10k pull-ups on TMS and TDI to keep the JTAG state machine in a known state during power-up.
The PQFP-208 package has relatively long leads (compared to modern QFN/BGA). Limit clock edges to 10 ns or slower; for faster clocks use the -7 (7 ns) or -5 (5 ns) speed grade. Place the CPLD near the devices it interfaces with, and use short direct traces for high-speed signals (clocks, bus arbitration) to minimize reflections.
Do not confuse the original EPM7256SQC208-10 (non-RoHS, 5V core) with the lead-free EPM7256AEQC208-10N (3.3V core AEC revision). The 'AE' prefix indicates the Enhanced Core. Also, do not mix up MAX 7000S with MAX 7000B (e.g. EPM7256BQC208-7) - both share the same 208-PQFP footprint and macrocell count but have different architecture revisions and timing characteristics.
合規資訊
The original EPM7256SQC208-10 is non-RoHS (no 'N' suffix). Choose EPM7256AEQC208-10N for RoHS/lead-free compliance. AEC-Q100 does not apply to commercial-grade MAX 7000S CPLDs; the AEC suffix indicates Altera Enhanced Core, not automotive qualification.
