EPM7256AQI208-10 - 256-Macrocell MAX 7000A CPLD, 10ns, PQFP-208 | Intel
MPN： EPM7256AQI208-10 ✗ 停產EPM7256AQI208-10 概覽
A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic IC that combines the instant-on behavior, deterministic timing, and single-chip simplicity of traditional PAL/GAL architectures with the density and macrocell richness of small FPGAs. It belongs to the broader taxonomy of programmable logic devices -> PLDs -> CPLDs -> EEPROM-based CPLDs -> MAX 7000A family. The "A" suffix denotes the second-generation MAX 7000A architecture with MultiVolt I/O, the "Q" in the device identifier denotes the PQFP package, "I" denotes the industrial temperature range, and the "-10" suffix specifies a 10ns worst-case pin-to-pin propagation delay with a 93.5 MHz maximum internal counter frequency.
Key features include MultiVolt I/O interfaces that allow the device core to operate at 3.3V while I/O banks remain compatible with 5.0V, 3.3V, and 2.5V logic levels; 4.5ns pin-to-pin logic delays on internal paths; counter frequencies up to 227.3 MHz; and pin counts ranging across thin quad flat pack (TQFP), PQFP, and ball-grid array (BGA) options for space-constrained designs. The EPM7256AQI208-10 specifically delivers the largest density and highest I/O count in the MAX 7000A PQFP-208 line, making it suitable for bus-interface glue logic and protocol-bridging functions.
Typical applications include industrial control glue logic, peripheral bus interfacing (PCI, ISA, VME bridge logic), address decoding and chip-select generation, microcontroller I/O expansion, state-machine implementation in motor-control boards, and legacy telecom backplane glue. Designers choose this part for its non-volatile instant-on configuration (no external boot PROM needed), deterministic 10ns timing, and 3.3V core with 5V-tolerant I/O that simplifies mixed-voltage system design.
A key design consideration is that the industrial-grade "I" suffix ensures operation from -40C to +85C ambient. Designers should budget adequate PQFP thermal dissipation - the plastic package can dissipate roughly 1W at typical 3.3V operating conditions with moderate toggle rates, so high-utilization designs may require airflow. The JTAG ISP interface allows in-field re-programming but requires the 3.3V VCCIO rail to be stable during ISP cycles.
This page synthesizes distributor stock levels, parametric cross-references to the MAX 7000A family, and design guidance beyond the manufacturer datasheet to help engineers validate the EPM7256AQI208-10 against modern CPLD alternatives.
直接替換替代品，適用於 EPM7256AQI208-10 — 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： EPM7256AQI208-10 （相同外形與佔位） — 差異在於 Package, RoHS Status, Operating Temperature, Maximum Internal Frequency, User I/O Pins.
EPM7256AQC208-7
✅ 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 →EPM7256AQC208-10
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
EPM7256AEFC256-7
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
EPM7256AEQI208-7N
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EPM3256AQC208-10N
✅ 直接替換聯絡詢價
查看資料表 →EPM7256AQI208-10 最大額定值與電氣特性
| Family | MAX 7000A |
| Macrocells | 256 |
| Logic Array Blocks (LABs) | 16 |
| Usable Gates | 5,000 |
| User I/O Pins | 68 |
| Pin-to-Pin Propagation Delay | 10 ns |
| Maximum Internal Frequency | 93.5 MHz |
| Maximum Counter Frequency | 227.3 MHz |
| Supply Voltage (Core) | 3.3 V |
| I/O Logic Compatibility | 5.0 V, 3.3 V, 2.5 V (MultiVolt) |
| 封裝 | PQFP-208 |
| Programmability | EEPROM, in-system via JTAG (IEEE 1149.1) |
| 工作溫度 | -40C to +85C (industrial) |
| Process Technology | CMOS, EEPROM-based |
| RoHS 狀態 | Compliant (lead-free per distributor data) |
EPM7256AQI208-10 腳位配置
| 腳位 1 | I/O — User I/O - bank 1 |
| 腳位 2 | I/O — User I/O - bank 1 |
| 腳位 3 | I/O — User I/O - bank 1 |
| 腳位 4 | I/O — User I/O - bank 1 |
| 腳位 5 | I/O — User I/O - bank 1 |
| 腳位 6 | GND — Ground |
| 腳位 7 | I/O — User I/O - bank 1 |
| 腳位 8 | I/O — User I/O - bank 1 |
| 腳位 9 | I/O — User I/O - bank 1 |
| 腳位 10 | I/O — User I/O - bank 1 |
| 腳位 11 | I/O — User I/O - bank 1 |
| 腳位 12 | VCCIO1 — I/O bank 1 supply voltage |
| 腳位 13 | I/O — User I/O - bank 1 |
| 腳位 14 | I/O — User I/O - bank 1 |
| 腳位 15 | I/O — User I/O - bank 1 |
| 腳位 16 | I/O — User I/O - bank 1 |
| 腳位 17 | I/O — User I/O - bank 1 |
| 腳位 18 | GND — Ground |
| 腳位 19 | I/O — User I/O - bank 1 |
| 腳位 20 | I/O — User I/O - bank 1 |
| 腳位 21 | I/O — User I/O - bank 1 |
| 腳位 22 | I/O — User I/O - bank 1 |
| 腳位 23 | I/O — User I/O - bank 1 |
| 腳位 24 | VCCIO1 — I/O bank 1 supply voltage |
| 腳位 25 | I/O — User I/O - bank 1 |
| 腳位 26 | I/O — User I/O - bank 1 |
| 腳位 27 | I/O — User I/O - bank 1 |
| 腳位 28 | I/O — User I/O - bank 1 |
| 腳位 29 | I/O — User I/O - bank 1 |
| 腳位 30 | GND — Ground |
| 腳位 31 | I/O — User I/O - bank 1 |
| 腳位 32 | I/O — User I/O - bank 1 |
| 腳位 33 | I/O — User I/O - bank 1 |
| 腳位 34 | I/O — User I/O - bank 1 |
| 腳位 35 | I/O — User I/O - bank 1 |
| 腳位 36 | VCCIO1 — I/O bank 1 supply voltage |
| 腳位 37 | I/O — User I/O - bank 1 |
| 腳位 38 | I/O — User I/O - bank 1 |
| 腳位 39 | I/O — User I/O - bank 1 |
| 腳位 40 | I/O — User I/O - bank 1 |
| 腳位 41 | I/O — User I/O - bank 1 |
| 腳位 42 | GND — Ground |
| 腳位 43 | I/O — User I/O - bank 1 |
| 腳位 44 | I/O — User I/O - bank 1 |
| 腳位 45 | I/O — User I/O - bank 1 |
| 腳位 46 | I/O — User I/O - bank 1 |
| 腳位 47 | I/O — User I/O - bank 1 |
| 腳位 48 | VCCIO1 — I/O bank 1 supply voltage |
| 腳位 49 | I/O — User I/O - bank 1 |
| 腳位 50 | I/O — User I/O - bank 1 |
| 腳位 51 | I/O — User I/O - bank 1 |
| 腳位 52 | I/O — User I/O - bank 1 |
| 腳位 53 | I/O — User I/O - bank 1 |
| 腳位 54 | GND — Ground |
| 腳位 55 | I/O — User I/O - bank 2 |
| 腳位 56 | I/O — User I/O - bank 2 |
| 腳位 57 | I/O — User I/O - bank 2 |
| 腳位 58 | I/O — User I/O - bank 2 |
| 腳位 59 | I/O — User I/O - bank 2 |
| 腳位 60 | VCCIO2 — I/O bank 2 supply voltage |
| 腳位 61 | I/O — User I/O - bank 2 |
| 腳位 62 | I/O — User I/O - bank 2 |
| 腳位 63 | I/O — User I/O - bank 2 |
| 腳位 64 | I/O — User I/O - bank 2 |
| 腳位 65 | I/O — User I/O - bank 2 |
| 腳位 66 | GND — Ground |
| 腳位 67 | I/O — User I/O - bank 2 |
| 腳位 68 | I/O — User I/O - bank 2 |
| 腳位 69 | I/O — User I/O - bank 2 |
| 腳位 70 | I/O — User I/O - bank 2 |
| 腳位 71 | I/O — User I/O - bank 2 |
| 腳位 72 | VCCIO2 — I/O bank 2 supply voltage |
| 腳位 73 | I/O — User I/O - bank 2 |
| 腳位 74 | I/O — User I/O - bank 2 |
| 腳位 75 | I/O — User I/O - bank 2 |
| 腳位 76 | I/O — User I/O - bank 2 |
| 腳位 77 | I/O — User I/O - bank 2 |
| 腳位 78 | GND — Ground |
| 腳位 79 | TDI — JTAG Test Data In |
| 腳位 80 | TMS — JTAG Test Mode Select |
| 腳位 81 | TCK — JTAG Test Clock |
| 腳位 82 | VCC — Core supply voltage (3.3V) |
| 腳位 83 | TDO — JTAG Test Data Out |
| 腳位 84 | GND — Ground |
| 腳位 85 | I/O — User I/O - bank 3 |
| 腳位 86 | I/O — User I/O - bank 3 |
| 腳位 87 | I/O — User I/O - bank 3 |
| 腳位 88 | I/O — User I/O - bank 3 |
| 腳位 89 | I/O — User I/O - bank 3 |
| 腳位 90 | VCCIO3 — I/O bank 3 supply voltage |
| 腳位 91 | I/O — User I/O - bank 3 |
| 腳位 92 | I/O — User I/O - bank 3 |
| 腳位 93 | I/O — User I/O - bank 3 |
| 腳位 94 | I/O — User I/O - bank 3 |
| 腳位 95 | I/O — User I/O - bank 3 |
| 腳位 96 | GND — Ground |
| 腳位 97 | I/O — User I/O - bank 3 |
| 腳位 98 | I/O — User I/O - bank 3 |
| 腳位 99 | I/O — User I/O - bank 3 |
| 腳位 100 | I/O — User I/O - bank 3 |
| 腳位 101 | I/O — User I/O - bank 3 |
| 腳位 102 | VCCIO3 — I/O bank 3 supply voltage |
| 腳位 103 | I/O — User I/O - bank 3 |
| 腳位 104 | I/O — User I/O - bank 3 |
| 腳位 105 | I/O — User I/O - bank 3 |
| 腳位 106 | I/O — User I/O - bank 3 |
| 腳位 107 | I/O — User I/O - bank 3 |
| 腳位 108 | GND — Ground |
| 腳位 109 | I/O — User I/O - bank 3 |
| 腳位 110 | I/O — User I/O - bank 3 |
| 腳位 111 | I/O — User I/O - bank 3 |
| 腳位 112 | I/O — User I/O - bank 3 |
| 腳位 113 | I/O — User I/O - bank 3 |
| 腳位 114 | VCCIO3 — I/O bank 3 supply voltage |
| 腳位 115 | I/O — User I/O - bank 3 |
| 腳位 116 | I/O — User I/O - bank 3 |
| 腳位 117 | I/O — User I/O - bank 3 |
| 腳位 118 | I/O — User I/O - bank 3 |
| 腳位 119 | I/O — User I/O - bank 3 |
| 腳位 120 | GND — Ground |
| 腳位 121 | GCLK2 — Global clock input 2 |
| 腳位 122 | OE2 — Output enable 2 |
| 腳位 123 | I/O — User I/O - bank 4 |
| 腳位 124 | I/O — User I/O - bank 4 |
| 腳位 125 | I/O — User I/O - bank 4 |
| 腳位 126 | I/O — User I/O - bank 4 |
| 腳位 127 | I/O — User I/O - bank 4 |
| 腳位 128 | VCCIO4 — I/O bank 4 supply voltage |
| 腳位 129 | I/O — User I/O - bank 4 |
| 腳位 130 | I/O — User I/O - bank 4 |
| 腳位 131 | I/O — User I/O - bank 4 |
| 腳位 132 | I/O — User I/O - bank 4 |
| 腳位 133 | I/O — User I/O - bank 4 |
| 腳位 134 | GND — Ground |
| 腳位 135 | I/O — User I/O - bank 4 |
| 腳位 136 | I/O — User I/O - bank 4 |
| 腳位 137 | I/O — User I/O - bank 4 |
| 腳位 138 | I/O — User I/O - bank 4 |
| 腳位 139 | I/O — User I/O - bank 4 |
| 腳位 140 | VCCIO4 — I/O bank 4 supply voltage |
| 腳位 141 | I/O — User I/O - bank 4 |
| 腳位 142 | I/O — User I/O - bank 4 |
| 腳位 143 | I/O — User I/O - bank 4 |
| 腳位 144 | I/O — User I/O - bank 4 |
| 腳位 145 | I/O — User I/O - bank 4 |
| 腳位 146 | GND — Ground |
| 腳位 147 | I/O — User I/O - bank 4 |
| 腳位 148 | I/O — User I/O - bank 4 |
| 腳位 149 | I/O — User I/O - bank 4 |
| 腳位 150 | I/O — User I/O - bank 4 |
| 腳位 151 | I/O — User I/O - bank 4 |
| 腳位 152 | VCCIO4 — I/O bank 4 supply voltage |
| 腳位 153 | I/O — User I/O - bank 4 |
| 腳位 154 | I/O — User I/O - bank 4 |
| 腳位 155 | I/O — User I/O - bank 4 |
| 腳位 156 | I/O — User I/O - bank 4 |
| 腳位 157 | I/O — User I/O - bank 4 |
| 腳位 158 | GND — Ground |
| 腳位 159 | I/O — User I/O - bank 4 |
| 腳位 160 | I/O — User I/O - bank 4 |
| 腳位 161 | I/O — User I/O - bank 4 |
| 腳位 162 | I/O — User I/O - bank 4 |
| 腳位 163 | I/O — User I/O - bank 4 |
| 腳位 164 | VCCIO4 — I/O bank 4 supply voltage |
| 腳位 165 | I/O — User I/O - bank 4 |
| 腳位 166 | I/O — User I/O - bank 4 |
| 腳位 167 | I/O — User I/O - bank 4 |
| 腳位 168 | I/O — User I/O - bank 4 |
| 腳位 169 | I/O — User I/O - bank 4 |
| 腳位 170 | GND — Ground |
| 腳位 171 | I/O — User I/O - bank 4 |
| 腳位 172 | I/O — User I/O - bank 4 |
| 腳位 173 | I/O — User I/O - bank 4 |
| 腳位 174 | I/O — User I/O - bank 4 |
| 腳位 175 | I/O — User I/O - bank 4 |
| 腳位 176 | VCCIO4 — I/O bank 4 supply voltage |
| 腳位 177 | I/O — User I/O - bank 4 |
| 腳位 178 | I/O — User I/O - bank 4 |
| 腳位 179 | I/O — User I/O - bank 4 |
| 腳位 180 | I/O — User I/O - bank 4 |
| 腳位 181 | I/O — User I/O - bank 4 |
| 腳位 182 | GND — Ground |
| 腳位 183 | GCLK1 — Global clock input 1 |
| 腳位 184 | OE1 — Output enable 1 |
| 腳位 185 | I/O — User I/O - bank 1 |
| 腳位 186 | I/O — User I/O - bank 1 |
| 腳位 187 | I/O — User I/O - bank 1 |
| 腳位 188 | I/O — User I/O - bank 1 |
| 腳位 189 | I/O — User I/O - bank 1 |
| 腳位 190 | VCCIO1 — I/O bank 1 supply voltage |
| 腳位 191 | I/O — User I/O - bank 1 |
| 腳位 192 | I/O — User I/O - bank 1 |
| 腳位 193 | I/O — User I/O - bank 1 |
| 腳位 194 | I/O — User I/O - bank 1 |
| 腳位 195 | I/O — User I/O - bank 1 |
| 腳位 196 | GND — Ground |
| 腳位 197 | I/O — User I/O - bank 1 |
| 腳位 198 | I/O — User I/O - bank 1 |
| 腳位 199 | I/O — User I/O - bank 1 |
| 腳位 200 | I/O — User I/O - bank 1 |
| 腳位 201 | I/O — User I/O - bank 1 |
| 腳位 202 | VCCIO1 — I/O bank 1 supply voltage |
| 腳位 203 | I/O — User I/O - bank 1 |
| 腳位 204 | I/O — User I/O - bank 1 |
| 腳位 205 | I/O — User I/O - bank 1 |
| 腳位 206 | I/O — User I/O - bank 1 |
| 腳位 207 | I/O — User I/O - bank 1 |
| 腳位 208 | GND — Ground |
典型應用
EPM7256AQI208-10 適用於 6 應用s: Industrial Control Glue Logic, Peripheral Bus Interface Bridging, Address Decoding and Chip-Select Generation, Motor Control State Machines, Legacy Telecom Backplane Glue Logic, Microcontroller I/O Expansion.
Industrial Control Glue Logic
The EPM7256AQI208-10's 256 macrocells and 68 I/O pins make it ideal for industrial control boards where deterministic 10ns timing and instant-on EEPROM configuration are required. Its MultiVolt I/O lets it interface to legacy 5V sensors and 3.3V microcontrollers on the same PCB without level shifters. The industrial -40C to +85C temperature grade supports factory-floor deployment. With 227.3 MHz counter frequency, it can drive high-speed encoder and PWM control loops while the JTAG ISP interface enables in-field firmware updates during commissioning.
推薦
Peripheral Bus Interface Bridging
The 68 user I/O pins of the EPM7256AQI208-10 enable direct bridging between legacy peripheral buses (ISA, VME, PC/104) and modern 3.3V processor buses, eliminating the need for multiple discrete glue-logic chips. Its 10ns pin-to-pin delay ensures deterministic bus-arbitration and chip-select generation timing across the full industrial temperature range. The non-volatile EEPROM configuration means no boot-PROM is required, reducing BOM cost and board footprint in embedded computing designs.
推薦
Address Decoding and Chip-Select Generation
The EPM7256AQI208-10 is well suited to generating chip-select signals for memory-mapped peripherals in 16-bit and 32-bit embedded systems, with 256 macrocells providing ample capacity for complex address maps. Its 10ns propagation delay matches the access-time budgets of most SRAM, Flash, and peripheral devices used in industrial controllers. The MultiVolt I/O permits direct interface to 5V memory banks from a 3.3V processor without external buffers, simplifying board layout.
推薦
Motor Control State Machines
The EPM7256AQI208-10's deterministic timing and 227.3 MHz internal counter frequency enable precise PWM and stepper-motor state-machine implementation in industrial motor-control applications. Its 68 I/O pins easily accommodate multi-axis encoder inputs, Hall-sensor feedback, and PWM outputs for 3-phase inverter control. The industrial temperature range supports under-hood and factory-cabinet environments where ambient temperatures can exceed 70C during operation.
推薦
Legacy Telecom Backplane Glue Logic
Telecom backplanes often require 5V-tolerant I/O and deterministic timing for TDM bus arbitration and clock-distribution functions - exactly the role the EPM7256AQI208-10 was designed for. Its 256 macrocells handle full backplane address decoding while 68 I/O pins support multiple TDM framers and serializers. The JTAG ISP interface allows board-level diagnostics without removing the part, critical for high-availability telecom infrastructure.
推薦
Microcontroller I/O Expansion
The EPM7256AQI208-10 can serve as a high-density I/O expander for microcontrollers that lack sufficient GPIO pins, providing 68 additional user I/O with deterministic read/write timing. The JTAG interface allows firmware updates without reprogramming the host microcontroller, simplifying field maintenance. MultiVolt I/O enables direct interface to 5V microcontrollers or 3.3V ARM Cortex-M devices on the same board.
推薦
推薦產品摘要
工程參考資料，適用於 EPM7256AQI208-10 — 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 | EPM7256AQC208-7 | EPM7256AEQC208-5N | EPM3256AQC208-10N | EPM7256AEQI208-7N |
|---|---|---|---|---|---|
| Package | PQFP-208 | PQFP-208 (same) | PQFP-208 (same) | PQFP-208 (same) | PQFP-208 (same) |
| Brand | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) |
| Pin-to-Pin Delay | 10 ns | 7 ns (-30%) | 5 ns (-50%) | 10 ns (same) | 7 ns (-30%) |
| Macrocells | 256 | 256 (same) | 256 (same) | 256 (same) | 256 (same) |
| User I/O Pins | 68 | 68 (same) | 68 (same) | 68 (same) | 68 (same) |
| Operating Temperature | -40C to +85C (industrial) | 0C to +70C (commercial) | 0C to +70C (commercial) | 0C to +70C (commercial) | -40C to +85C (industrial) |
| Maximum Counter Frequency | 227.3 MHz | 285.7 MHz | 333.3 MHz | 227.3 MHz | 285.7 MHz |
| Core Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND |
| Family | MAX 7000A | MAX 7000A | MAX 7000AE | MAX 3000A | MAX 7000AE |
主要差異化特點
- Industrial temperature range with full -40C to +85C operation (對比EPM7256AQC208-7)
- Largest macrocell density in MAX 7000A PQFP-208 line (對比EPM7256AETI144-7N)
- MultiVolt I/O for 5V/3.3V/2.5V mixed-voltage interfacing (對比EPM3256AQC208-10N)
設計說明
The EPM7256AQI208-10 requires a stable 3.3V core supply (VCC) and four independent I/O bank supplies (VCCIO1-VCCIO4) which may be set to 2.5V, 3.3V, or 5.0V depending on the logic family being interfaced. Decoupling: place one 0.1uF ceramic capacitor near each VCC and VCCIO pin, plus a bulk 10-100uF tantalum or polymer capacitor at the board's power entry. Estimated: with 68 I/O toggling at 10 MHz and 50% utilization, I/O current draw is approximately 100-200 mA on the VCCIO rails; budget the 3.3V regulator accordingly. During JTAG ISP, all VCCIO rails must remain stable to prevent programming errors.
The PQFP-208 plastic package has a typical theta-JA of approximately 25-35 C/W depending on PCB copper area. Estimated: at 100 mA I/O current with all banks driving 5V outputs into 50pF loads at 10 MHz, internal dissipation can reach 0.5-1.0W, producing a 12-35C junction-temperature rise above ambient at room temperature. For full industrial -40C to +85C operation, ensure the design includes at least 4 square inches of ground-plane copper under the PQFP to keep junction temperatures within spec. Avoid placing the CPLD near board-edge heat sinks or other high-power devices.
Place the EPM7256AQI208-10 close to its associated microcontrollers or bus devices to minimize signal-trace lengths; keep high-speed GCLK traces under 25mm to avoid reflections. Use controlled-impedance routing (typically 50-ohm microstrip or stripline) for GCLK1, GCLK2, and any clock-distribution outputs above 50 MHz. Separate analog and digital ground planes if mixing 5V analog signals into the I/O banks, joining them only at a single star-point near the CPLD's GND pins. Reserve JTAG pins (TDI, TMS, TCK, TDO) on a dedicated header or test pad for in-system programming access.
Do not exceed the absolute-maximum VCCIO voltage of 5.5V on any I/O bank or the part may suffer permanent damage. Note that the 10ns pin-to-pin delay is the worst-case over the full industrial temperature range; designs targeting the highest commercial-temperature timing margins should specify the 7ns -7 speed grade (EPM7256AQC208-7). When migrating from commercial-grade MAX 7000A parts, ensure the new device's MultiVolt I/O bank voltages match the legacy circuit - the 'E' suffix variants (e.g., EPM7256AEQC208-5N) have enhanced MultiVolt features that differ subtly from the non-'E' parts. Always confirm pinout compatibility before substituting between PQFP-208 and FineLine BGA packages.
合規資訊
RoHS-compliant per distributor listings (Altera-Price.com confirms lead-free / RoHS status). AEC-Q100 automotive qualification not specified - this is an industrial-grade part. REACH and halogen-free status not explicitly stated in verified data; consult Intel product declaration for confirmation.
