EPM9320RI208-20N - MAX 9000 CPLD 320 Macrocell 208-PQFP | Altera
料号： EPM9320RI208-20N ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
EPM9320RI208-20N 概述
A CPLD (Complex Programmable Logic Device) is a programmable logic IC that combines multiple programmable logic array blocks with a programmable interconnect matrix, allowing designers to implement custom digital logic functions without fabricating an ASIC. Within the programmable logic hierarchy, the CPLD sits between simple PLDs (PAL/GAL) and full FPGAs, offering non-volatile configuration, deterministic timing, and instant-on operation. The MAX 9000 family is built on Altera's third-generation Multiple Array MatriX (MAX) architecture, which uses EEPROM cells to retain configuration without an external boot device.
Key features of the EPM9320RI208-20N include 320 macrocells organized into Logic Array Blocks (LABs), 484 flip-flops, 5.0 V in-system programmability via JTAG, and four dedicated low-skew global input pins typically used for clock, clear, and output-enable distribution. The device supports 3.3 V or 5 V configurable I/O operation, making it suitable for mixed-voltage legacy systems. The industrial temperature grade (I suffix) covers -40C to +85C operation.
The MAX 9000 architecture routes signals through a programmable interconnect array that provides predictable, fixed pin-to-pin delays of 20 ns, eliminating the timing uncertainty found in SRAM-based FPGAs. This deterministic timing is critical for glue-logic replacement, bus interface, and state-machine applications where worst-case delay must be guaranteed.
Typical applications include legacy system glue logic, ISA/PCI bus interfaces, industrial control state machines, instrumentation front-end logic, and replacement of discrete 74-series logic. The 208-pin PQFP package provides up to 160 user I/O pins for wide bus interfaces.
When designing with this device, note that VCC must rise monotonically during power-up, and inputs may undershoot to -2.0 V or overshoot to 7.0 V for periods shorter than 20 ns under no-load conditions. The EPM9320RI208-20N is a mature, widely second-sourced part; verify lifecycle status before committing to new designs.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers with a single reference for replacement and design-in decisions.
直接替换替代料： EPM9320RI208-20N ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： EPM9320RI208-20N （相同外形与封装尺寸） ——差异在于 Package, In-System Programmability, Usable Gates, Device Type, Macro Cells.
快速对比工具——选择替代料号进行并排对比：
EPM9320RI208-20
✅ 直接替换✓ 有现货
$18.95 / 个
查看数据手册 →EPM9320RI208-10N
✅ 直接替换✓ 有现货
$27.2 / 个
查看数据手册 →EPM9320RC208-20N
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →EPM9320RC208-20
✅ 直接替换✓ 有现货
$21.9 / 个
查看数据手册 →EPM9320RC208-15N
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →EPM9320RC208-15
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →EPM9320RI208-20N 最大额定值与电气特性
| Device Family | MAX 9000 (EPM9320) |
| Logic Type | EEPROM-based Complex Programmable Logic Device (CPLD) |
| Macrocells | 320 |
| Flip-Flops | 484 |
| Propagation Delay (tPD) | 20 ns |
| Supply Voltage (VCC) | 5.0 V |
| I/O Voltage Tolerance | 3.3 V or 5 V configurable |
| 封装 | 208-pin PQFP (Plastic Quad Flat Pack) |
| Package Lead Pitch | 0.500 mm |
| Number of Terminals | 208 |
| 工作温度范围 | -40C to +85C (Industrial) |
| In-System Programmability | Yes, 5.0 V ISP via JTAG |
| JTAG Interface | IEEE Std. 1149.1 compliant |
| Configuration Memory | EEPROM (non-volatile) |
| Dedicated Input Pins | 4 (low-skew global distribution) |
| Minimum DC Input on I/O Pins | -0.5 V |
| Minimum DC Input on Dedicated Inputs | -0.3 V |
| Input Undershoot/ Overshoot | -2.0 V / 7.0 V for <20 ns (no-load) |
| 安装类型 | Surface Mount |
EPM9320RI208-20N 引脚配置
| 引脚 1 | I/O — General-purpose I/O pin |
| 引脚 2 | I/O — General-purpose I/O pin |
| 引脚 3 | I/O — General-purpose I/O pin |
| 引脚 4 | I/O — General-purpose I/O pin |
| 引脚 5 | I/O — General-purpose I/O pin |
| 引脚 6 | I/O — General-purpose I/O pin |
| 引脚 7 | I/O — General-purpose I/O pin |
| 引脚 8 | I/O — General-purpose I/O pin |
| 引脚 9 | I/O — General-purpose I/O pin |
| 引脚 10 | I/O — General-purpose I/O pin |
| 引脚 11 | I/O — General-purpose I/O pin |
| 引脚 12 | I/O — General-purpose I/O pin |
| 引脚 13 | I/O — General-purpose I/O pin |
| 引脚 14 | I/O — General-purpose I/O pin |
| 引脚 15 | I/O — General-purpose I/O pin |
| 引脚 16 | I/O — General-purpose I/O pin |
| 引脚 17 | I/O — General-purpose I/O pin |
| 引脚 18 | I/O — General-purpose I/O pin |
| 引脚 19 | I/O — General-purpose I/O pin |
| 引脚 20 | I/O — General-purpose I/O pin |
| 引脚 21 | I/O — General-purpose I/O pin |
| 引脚 22 | I/O — General-purpose I/O pin |
| 引脚 23 | I/O — General-purpose I/O pin |
| 引脚 24 | I/O — General-purpose I/O pin |
| 引脚 25 | I/O — General-purpose I/O pin |
| 引脚 26 | I/O — General-purpose I/O pin |
| 引脚 27 | I/O — General-purpose I/O pin |
| 引脚 28 | I/O — General-purpose I/O pin |
| 引脚 29 | I/O — General-purpose I/O pin |
| 引脚 30 | I/O — General-purpose I/O pin |
| 引脚 31 | I/O — General-purpose I/O pin |
| 引脚 32 | I/O — General-purpose I/O pin |
| 引脚 33 | I/O — General-purpose I/O pin |
| 引脚 34 | I/O — General-purpose I/O pin |
| 引脚 35 | I/O — General-purpose I/O pin |
| 引脚 36 | I/O — General-purpose I/O pin |
| 引脚 37 | I/O — General-purpose I/O pin |
| 引脚 38 | I/O — General-purpose I/O pin |
| 引脚 39 | I/O — General-purpose I/O pin |
| 引脚 40 | I/O — General-purpose I/O pin |
| 引脚 41 | I/O — General-purpose I/O pin |
| 引脚 42 | I/O — General-purpose I/O pin |
| 引脚 43 | I/O — General-purpose I/O pin |
| 引脚 44 | I/O — General-purpose I/O pin |
| 引脚 45 | I/O — General-purpose I/O pin |
| 引脚 46 | I/O — General-purpose I/O pin |
| 引脚 47 | I/O — General-purpose I/O pin |
| 引脚 48 | I/O — General-purpose I/O pin |
| 引脚 49 | I/O — General-purpose I/O pin |
| 引脚 50 | I/O — General-purpose I/O pin |
| 引脚 51 | I/O — General-purpose I/O pin |
| 引脚 52 | I/O — General-purpose I/O pin |
| 引脚 53 | GND — Ground |
| 引脚 54 | VCC — 5.0 V power supply |
| 引脚 55 | I/O — General-purpose I/O pin |
| 引脚 56 | I/O — General-purpose I/O pin |
| 引脚 57 | I/O — General-purpose I/O pin |
| 引脚 58 | I/O — General-purpose I/O pin |
| 引脚 59 | I/O — General-purpose I/O pin |
| 引脚 60 | I/O — General-purpose I/O pin |
| 引脚 61 | I/O — General-purpose I/O pin |
| 引脚 62 | I/O — General-purpose I/O pin |
| 引脚 63 | I/O — General-purpose I/O pin |
| 引脚 64 | I/O — General-purpose I/O pin |
| 引脚 65 | I/O — General-purpose I/O pin |
| 引脚 66 | I/O — General-purpose I/O pin |
| 引脚 67 | I/O — General-purpose I/O pin |
| 引脚 68 | I/O — General-purpose I/O pin |
| 引脚 69 | I/O — General-purpose I/O pin |
| 引脚 70 | I/O — General-purpose I/O pin |
| 引脚 71 | I/O — General-purpose I/O pin |
| 引脚 72 | I/O — General-purpose I/O pin |
| 引脚 73 | I/O — General-purpose I/O pin |
| 引脚 74 | I/O — General-purpose I/O pin |
| 引脚 75 | I/O — General-purpose I/O pin |
| 引脚 76 | I/O — General-purpose I/O pin |
| 引脚 77 | I/O — General-purpose I/O pin |
| 引脚 78 | I/O — General-purpose I/O pin |
| 引脚 79 | I/O — General-purpose I/O pin |
| 引脚 80 | I/O — General-purpose I/O pin |
| 引脚 81 | I/O — General-purpose I/O pin |
| 引脚 82 | I/O — General-purpose I/O pin |
| 引脚 83 | I/O — General-purpose I/O pin |
| 引脚 84 | I/O — General-purpose I/O pin |
| 引脚 85 | I/O — General-purpose I/O pin |
| 引脚 86 | I/O — General-purpose I/O pin |
| 引脚 87 | I/O — General-purpose I/O pin |
| 引脚 88 | I/O — General-purpose I/O pin |
| 引脚 89 | I/O — General-purpose I/O pin |
| 引脚 90 | I/O — General-purpose I/O pin |
| 引脚 91 | I/O — General-purpose I/O pin |
| 引脚 92 | I/O — General-purpose I/O pin |
| 引脚 93 | I/O — General-purpose I/O pin |
| 引脚 94 | I/O — General-purpose I/O pin |
| 引脚 95 | I/O — General-purpose I/O pin |
| 引脚 96 | I/O — General-purpose I/O pin |
| 引脚 97 | I/O — General-purpose I/O pin |
| 引脚 98 | I/O — General-purpose I/O pin |
| 引脚 99 | I/O — General-purpose I/O pin |
| 引脚 100 | I/O — General-purpose I/O pin |
| 引脚 101 | I/O — General-purpose I/O pin |
| 引脚 102 | I/O — General-purpose I/O pin |
| 引脚 103 | I/O — General-purpose I/O pin |
| 引脚 104 | I/O — General-purpose I/O pin |
| 引脚 105 | GND — Ground |
| 引脚 106 | VCC — 5.0 V power supply |
| 引脚 107 | I/O — General-purpose I/O pin |
| 引脚 108 | I/O — General-purpose I/O pin |
| 引脚 109 | I/O — General-purpose I/O pin |
| 引脚 110 | I/O — General-purpose I/O pin |
| 引脚 111 | I/O — General-purpose I/O pin |
| 引脚 112 | I/O — General-purpose I/O pin |
| 引脚 113 | I/O — General-purpose I/O pin |
| 引脚 114 | I/O — General-purpose I/O pin |
| 引脚 115 | I/O — General-purpose I/O pin |
| 引脚 116 | I/O — General-purpose I/O pin |
| 引脚 117 | I/O — General-purpose I/O pin |
| 引脚 118 | I/O — General-purpose I/O pin |
| 引脚 119 | I/O — General-purpose I/O pin |
| 引脚 120 | I/O — General-purpose I/O pin |
| 引脚 121 | I/O — General-purpose I/O pin |
| 引脚 122 | I/O — General-purpose I/O pin |
| 引脚 123 | I/O — General-purpose I/O pin |
| 引脚 124 | I/O — General-purpose I/O pin |
| 引脚 125 | I/O — General-purpose I/O pin |
| 引脚 126 | I/O — General-purpose I/O pin |
| 引脚 127 | I/O — General-purpose I/O pin |
| 引脚 128 | I/O — General-purpose I/O pin |
| 引脚 129 | I/O — General-purpose I/O pin |
| 引脚 130 | I/O — General-purpose I/O pin |
| 引脚 131 | I/O — General-purpose I/O pin |
| 引脚 132 | I/O — General-purpose I/O pin |
| 引脚 133 | I/O — General-purpose I/O pin |
| 引脚 134 | I/O — General-purpose I/O pin |
| 引脚 135 | I/O — General-purpose I/O pin |
| 引脚 136 | I/O — General-purpose I/O pin |
| 引脚 137 | I/O — General-purpose I/O pin |
| 引脚 138 | I/O — General-purpose I/O pin |
| 引脚 139 | I/O — General-purpose I/O pin |
| 引脚 140 | I/O — General-purpose I/O pin |
| 引脚 141 | I/O — General-purpose I/O pin |
| 引脚 142 | I/O — General-purpose I/O pin |
| 引脚 143 | I/O — General-purpose I/O pin |
| 引脚 144 | I/O — General-purpose I/O pin |
| 引脚 145 | I/O — General-purpose I/O pin |
| 引脚 146 | I/O — General-purpose I/O pin |
| 引脚 147 | I/O — General-purpose I/O pin |
| 引脚 148 | I/O — General-purpose I/O pin |
| 引脚 149 | I/O — General-purpose I/O pin |
| 引脚 150 | I/O — General-purpose I/O pin |
| 引脚 151 | I/O — General-purpose I/O pin |
| 引脚 152 | I/O — General-purpose I/O pin |
| 引脚 153 | I/O — General-purpose I/O pin |
| 引脚 154 | I/O — General-purpose I/O pin |
| 引脚 155 | I/O — General-purpose I/O pin |
| 引脚 156 | I/O — General-purpose I/O pin |
| 引脚 157 | GND — Ground |
| 引脚 158 | VCC — 5.0 V power supply |
| 引脚 159 | I/O — General-purpose I/O pin |
| 引脚 160 | I/O — General-purpose I/O pin |
| 引脚 161 | I/O — General-purpose I/O pin |
| 引脚 162 | I/O — General-purpose I/O pin |
| 引脚 163 | I/O — General-purpose I/O pin |
| 引脚 164 | I/O — General-purpose I/O pin |
| 引脚 165 | I/O — General-purpose I/O pin |
| 引脚 166 | I/O — General-purpose I/O pin |
| 引脚 167 | I/O — General-purpose I/O pin |
| 引脚 168 | I/O — General-purpose I/O pin |
| 引脚 169 | I/O — General-purpose I/O pin |
| 引脚 170 | I/O — General-purpose I/O pin |
| 引脚 171 | I/O — General-purpose I/O pin |
| 引脚 172 | I/O — General-purpose I/O pin |
| 引脚 173 | I/O — General-purpose I/O pin |
| 引脚 174 | I/O — General-purpose I/O pin |
| 引脚 175 | I/O — General-purpose I/O pin |
| 引脚 176 | I/O — General-purpose I/O pin |
| 引脚 177 | I/O — General-purpose I/O pin |
| 引脚 178 | I/O — General-purpose I/O pin |
| 引脚 179 | I/O — General-purpose I/O pin |
| 引脚 180 | I/O — General-purpose I/O pin |
| 引脚 181 | I/O — General-purpose I/O pin |
| 引脚 182 | I/O — General-purpose I/O pin |
| 引脚 183 | I/O — General-purpose I/O pin |
| 引脚 184 | I/O — General-purpose I/O pin |
| 引脚 185 | I/O — General-purpose I/O pin |
| 引脚 186 | I/O — General-purpose I/O pin |
| 引脚 187 | I/O — General-purpose I/O pin |
| 引脚 188 | I/O — General-purpose I/O pin |
| 引脚 189 | I/O — General-purpose I/O pin |
| 引脚 190 | I/O — General-purpose I/O pin |
| 引脚 191 | I/O — General-purpose I/O pin |
| 引脚 192 | I/O — General-purpose I/O pin |
| 引脚 193 | I/O — General-purpose I/O pin |
| 引脚 194 | I/O — General-purpose I/O pin |
| 引脚 195 | I/O — General-purpose I/O pin |
| 引脚 196 | I/O — General-purpose I/O pin |
| 引脚 197 | I/O — General-purpose I/O pin |
| 引脚 198 | I/O — General-purpose I/O pin |
| 引脚 199 | I/O — General-purpose I/O pin |
| 引脚 200 | I/O — General-purpose I/O pin |
| 引脚 201 | I/O — General-purpose I/O pin |
| 引脚 202 | I/O — General-purpose I/O pin |
| 引脚 203 | I/O — General-purpose I/O pin |
| 引脚 204 | I/O — General-purpose I/O pin |
| 引脚 205 | I/O — General-purpose I/O pin |
| 引脚 206 | I/O — General-purpose I/O pin |
| 引脚 207 | I/O — General-purpose I/O pin |
| 引脚 208 | I/O — General-purpose I/O pin |
典型应用
EPM9320RI208-20N 适用于 6 应用s: Legacy Glue Logic Replacement, Industrial Control State Machines, Bus Interface and Protocol Bridging, Instrumentation Front-End Logic, Telecommunications Line Card Control, Military and Aerospace Legacy Upgrades.
Legacy Glue Logic Replacement
The EPM9320RI208-20N is widely used to consolidate dozens of discrete 74-series logic ICs into a single 208-pin PQFP device. Its 320 macrocells and 484 flip-flops can absorb address decoding, bus arbitration, and control-signal generation that previously required multiple boards. The 20 ns pin-to-pin delay is deterministic and guaranteed, unlike SRAM-based FPGAs, so worst-case timing analysis remains straightforward. Because configuration is stored in on-chip EEPROM, the device is instant-on at power-up with no external boot PROM, which is critical for legacy systems that must not add a configuration delay. Designers typically map existing 74LS/74F logic equations directly into the MAX 9000 architecture using Altera's MAX+PLUS II toolchain, preserving the original timing budget while reducing board area and component count.
推荐
Industrial Control State Machines
The EPM9320RI208-20N is well suited to industrial control state machines because its industrial temperature rating of -40C to +85C covers factory-floor and outdoor environments. The 484 flip-flops allow complex multi-state sequencers to be implemented entirely on-chip, while the 20 ns propagation delay guarantees deterministic state-transition timing. The four dedicated low-skew input pins distribute global clock, clear, and output-enable signals across all Logic Array Blocks, minimizing clock skew in synchronous designs. EEPROM configuration means the state machine resumes its programmed behavior immediately after a power interruption, without the reconfiguration latency of SRAM-based devices. Typical implementations include conveyor sequencing, valve and actuator control, and safety interlock logic in PLC-adjacent subsystems.
推荐
Bus Interface and Protocol Bridging
The EPM9320RI208-20N provides up to 160 user I/O pins in its 208-pin PQFP package, making it effective for wide bus interface and protocol bridging tasks. Its 3.3 V or 5 V configurable I/O allows it to sit between legacy 5 V peripherals and 3.3 V host controllers, translating voltage levels and bus protocols in a single device. The 20 ns pin-to-pin delay supports bus cycle times down to roughly 50 MHz for simple combinatorial paths, adequate for ISA, PC/104, and similar legacy buses. Designers implement address decoding, wait-state generation, and handshake logic in the programmable array, replacing discrete transceivers and PALs. The non-volatile EEPROM configuration ensures the bridge logic is active from the first clock edge after power-up, avoiding bus contention during system initialization.
推荐
Instrumentation Front-End Logic
In test and measurement instruments, the EPM9320RI208-20N handles front-end control logic such as trigger generation, sample-clock sequencing, and ADC/DAC interface timing. The 20 ns deterministic delay allows precise placement of trigger and conversion-start edges relative to the sample clock, which directly affects measurement jitter. The 484 flip-flops support multi-channel sample counters and FIFO control without external logic. Because the device is EEPROM-configured, it powers up in a known state, which is important for instruments that must be ready immediately after power-on. The industrial temperature range supports benchtop and rack-mount instruments operating in non-climate-controlled environments. Designers often pair the CPLD with precision analog front-ends to implement programmable gain and channel-selection sequencing.
推荐
Telecommunications Line Card Control
The EPM9320RI208-20N is used on telecommunications line cards for local control functions such as timeslot assignment, framer interface logic, and alarm monitoring. Its 320 macrocells can implement per-channel control state machines for multiple T1/E1 or similar line interfaces, while the 208-pin package provides enough I/O to connect to framers, line drivers, and backplane connectors. The 5.0 V supply and 3.3 V/5 V configurable I/O match the mixed-voltage environment typical of telecom equipment. Deterministic 20 ns timing simplifies worst-case timing analysis for the control path, and EEPROM configuration ensures the line card is operational immediately after power restoration, which is essential for carrier-grade availability requirements.
推荐
Military and Aerospace Legacy Upgrades
The EPM9320RI208-20N is sometimes selected for military and aerospace legacy upgrades where an existing MAX 9000 design must be maintained or reproduced. Its industrial temperature range of -40C to +85C covers many ground-vehicle and avionics-bay environments, though it is not a radiation-hardened or full military-temperature part. The EEPROM configuration provides instant-on operation and immunity to single-event configuration upsets that affect SRAM FPGAs. The 20 ns deterministic delay supports repeatable timing in control and interface logic. Engineers performing form-fit-function replacement of obsolete boards often choose this device because the MAX 9000 architecture and MAX+PLUS II design flow are well documented, reducing requalification effort compared with migrating to a modern FPGA.
推荐
推荐产品汇总
工程参考数据： EPM9320RI208-20N ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | EPM9320RI208-20 | EPM9320RI208-10N | EPM9320RC208-20N | EPM9320RC208-15N |
|---|---|---|---|---|---|
| Package | 208-pin PQFP | 208-pin PQFP - same | 208-pin PQFP - same | 208-pin PQFP - same | 208-pin PQFP - same |
| Brand | Altera | Altera | Altera | Altera | Altera |
| Propagation Delay (tPD) | 20 ns | 20 ns | 10 ns | 20 ns | 15 ns |
| Macrocells | 320 | 320 | 320 | 320 | 320 |
| Flip-Flops | 484 | 484 | 484 | 484 | 484 |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Commercial (0C to +70C) |
| Supply Voltage (VCC) | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V |
| In-System Programmability | Yes (5.0 V ISP via JTAG) | Yes (5.0 V ISP via JTAG) | Yes (5.0 V ISP via JTAG) | Yes (5.0 V ISP via JTAG) | Yes (5.0 V ISP via JTAG) |
| Configuration Memory | EEPROM (non-volatile) | EEPROM (non-volatile) | EEPROM (non-volatile) | EEPROM (non-volatile) | EEPROM (non-volatile) |
| Lead Finish | Lead-free (N suffix) | Leaded (non-N) | Lead-free (N suffix) | Lead-free (N suffix) | Lead-free (N suffix) |
关键差异点
- Industrial temperature range with lead-free finish （对比 EPM9320RC208-20N)
- 20 ns speed grade at lower cost than 10 ns variant （对比 EPM9320RI208-10N)
- Lead-free (N) package finish （对比 EPM9320RI208-20)
- Deterministic 20 ns timing versus SRAM FPGA alternatives （对比 EPM9320RC208-15N)
设计说明
VCC must rise monotonically during power-up to guarantee correct EEPROM configuration loading. According to the MAX 9000 datasheet, a non-monotonic ramp can leave the device in an indeterminate state. Use a power-supply supervisor or RC network to ensure a clean 5.0 V ramp. Decouple each VCC pin with a 0.1 uF ceramic capacitor placed within 5 mm of the pin, plus a bulk 10 uF capacitor per device. Estimated: at 5.0 V and typical ICC of a few hundred mA, total decoupling should support transient currents without exceeding 50 mV ripple.
The four dedicated input pins provide low-skew, device-wide distribution for global clock, clear, and output-enable signals. Route these signals as controlled-impedance traces (50 ohm) and keep stub lengths under 10 mm to preserve the low-skew benefit. Do not use general-purpose I/O pins for global clocks, as they route through the programmable interconnect and add delay and skew. Terminate unused dedicated inputs to GND or VCC through a resistor rather than leaving them floating.
Inputs may undershoot to -2.0 V or overshoot to 7.0 V for periods shorter than 20 ns under no-load conditions, but sustained excursions beyond the -0.5 V (I/O) or -0.3 V (dedicated input) minimum DC limits will damage the device. Add series termination resistors (22-33 ohm) on fast-edge signals that drive long traces. Also verify that the JTAG TCK, TMS, TDI, and TDO pins are not loaded by other devices on the scan chain in a way that violates setup/hold timing during ISP.
The 208-pin PQFP package dissipates heat primarily through the package body and leads. Estimated: at 5.0 V and 300 mA ICC, power dissipation is approximately 1.5 W. With a typical theta_JA of 30-40 C/W for a 208-pin PQFP on a multi-layer board, junction temperature rise is roughly 45-60 C above ambient. In a 70 C ambient environment this approaches the 85 C industrial limit, so provide adequate copper area on the VCC and GND planes and ensure airflow in enclosed cabinets.
Place the device centrally on the board to minimize trace lengths to connected peripherals. Keep the JTAG header close to the CPLD and route TCK as a controlled-impedance trace away from noisy switching signals. Use a solid ground plane under the device and avoid routing high-speed signals beneath the package. For the 0.5 mm lead pitch, use a stencil with adequate paste release and verify solder-joint quality with X-ray inspection, as fine-pitch PQFP assembly is prone to bridging.
合规信息
The 'N' suffix in Altera part numbering typically denotes a lead-free package variant, but RoHS/REACH compliance was not confirmed in the retrieved web data. Verify with the manufacturer or distributor certificate of compliance before design-in. AEC-Q100 is not applicable to this industrial-grade CPLD.