EPM7256SQI208-10 - MAX 7000 CPLD 256 Macrocell 10ns | Altera
N.º da peça: EPM7256SQI208-10 ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $0.5 | $0,50 |
| 10 | $0.48 | $4,80 |
| 100 | $0.45 | $45,00 |
| 500 | $0.42 | $210,00 |
| 1.000 | $0.4 | $400,00 |
EPM7256SQI208-10 Visão geral
A CPLD (Complex Programmable Logic Device) is a programmable logic IC that combines multiple PAL-like logic blocks and a programmable interconnect array on a single die, allowing a designer to implement custom combinational and sequential logic without fabricating an ASIC. CPLDs sit between simple programmable logic devices (SPLDs) and FPGAs in the programmable logic hierarchy, and the MAX 7000 family uses EEPROM configuration cells, so the design is retained after power-down without an external configuration memory.
The EPM7256SQI208-10 offers 256 macrocells organized into 16 logic array blocks, 164 maximum user I/O pins, and a 10 ns propagation delay (tPD) that supports system clock rates up to approximately 100 MHz for simple logic paths. The EEPROM-based architecture provides non-volatile operation, in-system programmability via the IEEE 1149.1 JTAG boundary-scan interface, and a programmable power-saving mode that reduces standby current for battery-backed or always-on designs.
The MAX 7000 architecture uses a programmable interconnect array (PIA) to route signals between logic array blocks, giving deterministic, predictable timing that is a key advantage over SRAM-based FPGAs for address decoding, bus bridging, and state-machine applications. The 5 V supply range of 4.5 V to 5.5 V allows direct interfacing to legacy 5 V TTL and CMOS logic without level shifters.
Typical applications include address decoding and chip-select generation in embedded processors, bus interface and glue logic between legacy peripherals, industrial control state machines, and replacement of discrete 74-series logic in existing 5 V designs. The industrial temperature rating makes it suitable for factory automation and instrumentation equipment.
When designing with the EPM7256SQI208-10, note that the device is a legacy MAX 7000 part and is no longer recommended for new designs; verify availability and consider MAX II or MAX V migration for new projects. Decouple each VCC pin with a 0.1 uF ceramic capacitor placed close to the package.
This page synthesizes distributor availability, drop-in same-family alternatives, and practical migration design notes that are not consolidated in the manufacturer datasheet, helping engineers evaluate the EPM7256SQI208-10 for legacy 5 V CPLD designs.
Alternativas drop-in para EPM7256SQI208-10 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com EPM7256SQI208-10 (mesmo formato e footprint) — diferindo em Package, Operating Temperature, Operating Temperature Range, RoHS Status, Speed Grade.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
EPM7256SQI208-10N
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
EPM7256SQC208-10
✅ Drop-In✓ Em estoque
$11.2 / unidade
Ver ficha técnica →EPM7256SQC208-7
✅ Drop-In✓ Em estoque
Consulte o preço
Ver ficha técnica →EPM7256SQC208-7N
✅ Drop-In✓ Em estoque
$27.2 / unidade
Ver ficha técnica →EPM7256SQC208-15
✅ Drop-In✓ Em estoque
$3.65 / unidade
Ver ficha técnica →EPM7256SQC208-15N
✅ Drop-In✓ Em estoque
Consulte o preço
Ver ficha técnica →EPM7256SQI208-10 Classificações máximas e características elétricas
| Device Family | MAX 7000 (EPM7256) |
| Macrocells | 256 |
| Usable Gates | 5000 |
| Logic Array Blocks | 16 |
| Maximum User I/O Pins | 164 |
| Propagation Delay (tPD) | 10 ns |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Technology | CMOS EEPROM |
| Configuration Memory | EEPROM (non-volatile) |
| In-System Programmable | Yes (IEEE 1149.1 JTAG) |
| Encapsulamento | 208-pin PQFP (QFP208) |
| Package Body Material | Plastic/Epoxy |
| Terminal Form | Gull Wing |
| Faixa de temperatura de operação | -40 C to +85 C (Industrial) |
| Tipo de montagem | Surface Mount |
| JESD-30 Package Code | S-PQFP-G208 |
| JESD-609 Terminal Finish Code | E3 |
Configuração de pinos do EPM7256SQI208-10
| Pino 1 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 2 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 3 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 4 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 5 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 6 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 7 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 8 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 9 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 10 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 11 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 12 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 13 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 14 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 15 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 16 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 17 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 18 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 19 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 20 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 21 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 22 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 23 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 24 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 25 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 26 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 27 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 28 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 29 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 30 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 31 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 32 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 33 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 34 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 35 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 36 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 37 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 38 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 39 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 40 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 41 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 42 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 43 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 44 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 45 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 46 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 47 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 48 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 49 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 50 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 51 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 52 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 53 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 54 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 55 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 56 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 57 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 58 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 59 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 60 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 61 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 62 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 63 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 64 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 65 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 66 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 67 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 68 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 69 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 70 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 71 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 72 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 73 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 74 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 75 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 76 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 77 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 78 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 79 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 80 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 81 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 82 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 83 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 84 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 85 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 86 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 87 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 88 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 89 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 90 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 91 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 92 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 93 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 94 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 95 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 96 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 97 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 98 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 99 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 100 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 101 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 102 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 103 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 104 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 105 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 106 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 107 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 108 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 109 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 110 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 111 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 112 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 113 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 114 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 115 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 116 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 117 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 118 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 119 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 120 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 121 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 122 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 123 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 124 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 125 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 126 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 127 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 128 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 129 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 130 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 131 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 132 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 133 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 134 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 135 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 136 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 137 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 138 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 139 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 140 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 141 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 142 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 143 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 144 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 145 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 146 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 147 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 148 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 149 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 150 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 151 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 152 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 153 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 154 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 155 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 156 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 157 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 158 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 159 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 160 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 161 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 162 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 163 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 164 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 165 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 166 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 167 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 168 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 169 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 170 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 171 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 172 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 173 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 174 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 175 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 176 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 177 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 178 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 179 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 180 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 181 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 182 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 183 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 184 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 185 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 186 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 187 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 188 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 189 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 190 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 191 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 192 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 193 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 194 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 195 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 196 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 197 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 198 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 199 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 200 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 201 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 202 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 203 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 204 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 205 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 206 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 207 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
| Pino 208 | I/O — General-purpose user I/O (per MAX 7000 datasheet pin assignment) |
Aplicações típicas
EPM7256SQI208-10 é adequado para 6 aplicaçãos: Legacy 5 V Address Decoding and Chip-Select Logic, Industrial Control State Machines, Bus Interface and Glue Logic for Legacy Peripherals, Replacement of Discrete 74-Series Logic, Instrumentation and Test Equipment Control, Telecom and Networking Line-Card Glue Logic.
Legacy 5 V Address Decoding and Chip-Select Logic
The EPM7256SQI208-10 fits legacy 5 V microprocessor address decoding because its 4.5 V to 5.5 V supply range interfaces directly to 5 V TTL/CMOS buses without level shifters, and its 10 ns pin-to-pin delay keeps chip-select timing within a single processor bus cycle. With 256 macrocells and 164 user I/O, it can absorb the address comparators, wait-state generators, and chip-select decoders that would otherwise require a dozen 74-series packages. The EEPROM configuration is non-volatile, so the decode logic is live immediately at power-up with no configuration PROM. A typical implementation places the CPLD between the CPU address bus and peripheral chip-select pins, using the programmable interconnect array for deterministic routing. The trade-off versus a modern MAX V CPLD is higher static current and a larger 208-pin PQFP footprint, but no board redesign is needed for existing 5 V systems.
Recomendado
Industrial Control State Machines
The EPM7256SQI208-10 is well suited to industrial control state machines because its -40 C to +85 C industrial temperature rating covers factory-floor and outdoor cabinet environments, and its EEPROM configuration survives power interruptions without reloading. The 256 macrocells can implement multi-state sequencers, handshake controllers, and safety interlocks with deterministic 10 ns timing, which is critical when state transitions must complete within a fixed scan period. Designers typically clock the CPLD from the system controller and use the 164 I/O pins to drive relays, opto-isolators, and motor-driver enable lines. Unlike an SRAM FPGA, the MAX 7000 device has no configuration boot delay, so the machine returns to a known state immediately after power restoration. The main trade-off is the 5 V supply requirement, which may need a dedicated rail in modern 3.3 V control cabinets.
Recomendado
Bus Interface and Glue Logic for Legacy Peripherals
The EPM7256SQI208-10 serves as bus-interface glue logic when bridging legacy 5 V peripherals such as ISA-style controllers, UARTs, and parallel interfaces to a host processor. Its 5 V CMOS I/O drives TTL-level peripheral buses directly, and the 256 macrocells provide enough capacity to implement address latching, read/write strobe generation, and wait-state insertion in one device. The programmable interconnect array gives fixed, predictable propagation delays, so bus timing margins can be calculated from the 10 ns tPD rather than estimated from place-and-route reports. In-system programmability through IEEE 1149.1 JTAG allows field firmware updates of the glue logic without removing the board. The trade-off is that the 208-pin PQFP consumes more board area than a modern small-form-factor CPLD, but it preserves the existing 5 V bus topology.
Recomendado
Replacement of Discrete 74-Series Logic
The EPM7256SQI208-10 consolidates boards full of 74-series TTL logic into a single 208-pin CPLD, reducing component count, board area, and assembly cost. Its 256 macrocells and 5,000 usable gates can absorb counters, shift registers, multiplexers, and comparators that would otherwise occupy dozens of discrete packages. Because the MAX 7000 architecture is EEPROM-based, the replacement logic is non-volatile and needs no external configuration device, unlike an SRAM FPGA. The 5 V supply and TTL-compatible I/O thresholds match the electrical environment of the original 74-series design, so no level shifting is required. Engineers typically migrate one functional block at a time and verify timing against the original discrete implementation using the 10 ns tPD specification. The trade-off is that a CPLD redesign requires logic synthesis and JTAG programming infrastructure.
Recomendado
Instrumentation and Test Equipment Control
The EPM7256SQI208-10 is used in instrumentation and test equipment for front-panel control, trigger sequencing, and measurement timing because its deterministic 10 ns propagation delay allows repeatable trigger-to-output timing that SRAM FPGAs cannot guarantee without extensive timing closure. The industrial temperature rating supports benchtop and rack-mount instruments that operate outside a climate-controlled lab, and the EEPROM configuration ensures the instrument boots into a known logic state without a configuration load. The 164 user I/O pins can drive front-panel LEDs, read rotary encoders, and sequence analog multiplexers. Designers often pair the CPLD with precision analog front-ends and use the CPLD to generate conversion start pulses. The trade-off is the 5 V supply and the relatively high static power of the MAX 7000 process compared with modern low-power CPLDs.
Recomendado
Telecom and Networking Line-Card Glue Logic
The EPM7256SQI208-10 provides glue logic on legacy telecom and networking line cards, where 5 V logic and deterministic timing are still required for backplane interface control, clock multiplexing, and status register aggregation. The 256 macrocells can implement multiple independent state machines for per-channel control, while the 164 I/O pins interface to backplane connectors and status LEDs. The EEPROM configuration means the line card initializes its control logic immediately on power-up, which is important for cards that must be ready before the host processor completes its boot sequence. The 10 ns tPD supports backplane control timing at rates up to roughly 100 MHz for simple paths. The trade-off versus a modern CPLD is higher power and a larger package, but the part preserves existing 5 V backplane designs without a costly re-spin.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para EPM7256SQI208-10 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | EPM7256SQI208-10N | EPM7256SQC208-10 | EPM7256SQC208-7 | EPM7256SQC208-15 |
|---|---|---|---|---|---|
| Package | 208-pin PQFP (QFP208) | 208-pin PQFP - same | 208-pin PQFP - same | 208-pin PQFP - same | 208-pin PQFP - same |
| Brand | Altera | Altera | Altera | Altera | Altera |
| Macrocells | 256 | 256 | 256 | 256 | 256 |
| Propagation Delay (tPD) | 10 ns | 10 ns | 10 ns | 7 ns | 15 ns |
| Operating Temperature Range | -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) |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| In-System Programmable (JTAG) | Yes (IEEE 1149.1) | Yes (IEEE 1149.1) | Yes (IEEE 1149.1) | Yes (IEEE 1149.1) | Yes (IEEE 1149.1) |
| Configuration Memory | EEPROM (non-volatile) | EEPROM (non-volatile) | EEPROM (non-volatile) | EEPROM (non-volatile) | EEPROM (non-volatile) |
| Maximum User I/O | 164 | 164 | 164 | 164 | 164 |
Principais diferenciais
- Industrial temperature rating (vs EPM7256SQC208-10)
- Lead-free option available in same footprint (vs EPM7256SQI208-10N)
- Faster speed grade available for timing-critical paths (vs EPM7256SQC208-7)
Notas de projeto
Decouple every VCC pin of the EPM7256SQI208-10 with a 0.1 uF ceramic capacitor placed as close to the package pin as possible, and add at least one 10 uF bulk capacitor per power plane. The MAX 7000 family draws transient current during logic switching, and inadequate decoupling causes ground bounce that can corrupt the programmable interconnect array timing. Estimated: with 164 simultaneously switching outputs at 5 V, transient current can exceed several hundred milliamps for a few nanoseconds, so keep the decoupling loop inductance low by using short, wide traces to a solid ground plane.
Route the JTAG signals (TCK, TMS, TDI, TDO) as short, controlled-impedance traces and keep them away from high-speed clock nets to avoid programming failures. Provide a dedicated 10-pin or 14-pin JTAG header with a clean ground return. The 208-pin PQFP has a 0.5 mm lead pitch, so use a solder-mask-defined footprint and verify the pad geometry against the MAX 7000 datasheet land pattern before fabrication. Place the device so that all decoupling capacitors are on the same side of the board as the CPLD.
Do not assume the EPM7256SQI208-10 is a drop-in for newer MAX II or MAX V CPLDs - those families use different packages, supply voltages, and pinouts, so a board re-spin is required. Also verify the speed grade: the -10 suffix means 10 ns tPD, and substituting a -15 part reduces the maximum clock rate by roughly 33%. Estimated: a design that closes timing at 10 ns may fail at 15 ns, so re-run static timing analysis if a slower grade is used as a substitute.
Informações de conformidade
RoHS and lead-free status for the base EPM7256SQI208-10 part number is not confirmed by the available web data; the EPM7256SQI208-10N variant is the explicitly lead-free version. AEC-Q100 is not applicable to this commercial/industrial CPLD.