EPM7256SQC208-15 - 256-Macrocell MAX 7000S CPLD, 15ns | Altera
N.º da peça: EPM7256SQC208-15 ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.5 | $4,50 |
| 10 | $4.32 | $43,20 |
| 100 | $4.24 | $424,00 |
| 500 | $3.95 | $1.975,00 |
| 1.000 | $3.65 | $3.650,00 |
EPM7256SQC208-15 Visão geral
A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic device that combines multiple PAL-like macrocell blocks with a programmable interconnect matrix. Architecturally, CPLDs sit between simple SPLDs/PALs and larger FPGAs in the programmable logic hierarchy: like SPLDs they offer instant-on, deterministic, flash- or EPROM-backed configuration, but like FPGAs they integrate hundreds to thousands of gates with predictable timing. The MAX 7000S family uses Altera's second-generation MAX architecture with EEPROM-based configuration cells, eliminating the need for an external boot PROM and enabling in-system programmability (ISP) via JTAG.
Key features of the EPM7256SQC208-15 include 256 macrocells distributed across 16 LABs, a global clock network, programmable power management with pin-controlled turbo-bit disable for low-power standby, JTAG-compliant boundary-scan (IEEE 1149.1), and four pin-compatible speed grades (7, 10, 12, 15 ns). The 'C' in the part number designates the commercial 0C to +70C operating range; '15' denotes the 15 ns pin-to-pin delay.
Typical applications include bus-bridging logic between microprocessors and peripherals, address decoding and chip-select generation in embedded systems, glue logic in telecommunications and networking equipment, industrial control state machines, and replacement of multiple discrete 74-series logic ICs. The 164 user I/Os comfortably support wide data and address buses plus control signals for legacy parallel interfaces.
When designing with the EPM7256SQC208-15, ensure 5V tolerance compatibility for the I/O banks, provide proper decoupling on VCCINT/VCCIO pins, and use the Altera MAX+PLUS II or Quartus II design tools for synthesis, fitting, and JTAG programming. Designers migrating to lower-density footprints should consider the speed-grade variants (EPM7256SQC208-10 for 10 ns, EPM7256SQC208-7 for 7 ns) which are pin-compatible drop-in upgrades.
Alternativas drop-in para EPM7256SQC208-15 — 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 EPM7256SQC208-15 (mesmo formato e footprint) — diferindo em Package, Speed Grade, Operating Temperature Range, RoHS Status, Device Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
EPM7256SQC208-10
✅ Drop-In✓ Em estoque
$11.2 / unidade
Ver ficha técnica →EPM7256SQC208-7
✅ Drop-In✓ Em estoque
Consulte o preço
Ver ficha técnica →EPM7256BQC208-7
✅ Drop-In✓ Em estoque
$9.75 / unidade
Ver ficha técnica →EPM7256AQC208-7
✅ Drop-In✓ Em estoque
$27.2 / unidade
Ver ficha técnica →EPM7256SQC208-15N
✅ Drop-In✓ Em estoque
Consulte o preço
Ver ficha técnica →EPM7256SQC208-15 Classificações máximas e características elétricas
| Family | MAX 7000S |
| Series | EPM7256 |
| Device Type | CPLD (Complex Programmable Logic Device) |
| Macrocells | 256 |
| Logic Array Blocks (LABs) | 16 |
| Usable Gates | 5000 |
| User I/O Pins | 164 |
| Pin-to-Pin Delay (tPD) | 15 ns |
| Supply Voltage (VCCINT) | 4.75 V to 5.25 V |
| Faixa de temperatura de operação | 0 C to +70 C (Commercial) |
| Encapsulamento | 208-pin PQFP (28x28 mm) |
| Tipo de montagem | Surface Mount |
| Programmable Power Mode | Yes (per-macrocell turbo-bit) |
| JTAG (IEEE 1149.1) Boundary-Scan | Yes |
| In-System Programmability (ISP) | Yes |
| Configuration Memory | EEPROM (non-volatile) |
| Status RoHS | Contains lead / RoHS non-compliant (per third-party listing) |
| Lead-Free Status | Contains lead |
Configuração de pinos do EPM7256SQC208-15
| Pino 1 | I/O — User I/O pin (LAB distributed) |
| Pino 2 | I/O — User I/O pin |
| Pino 3 | I/O — User I/O pin |
| Pino 4 | I/O — User I/O pin |
| Pino 5 | I/O — User I/O pin |
| Pino 6 | I/O — User I/O pin |
| Pino 7 | VCCINT — Internal supply voltage (4.75V-5.25V) |
| Pino 8 | I/O — User I/O pin |
| Pino 9 | I/O — User I/O pin |
| Pino 10 | I/O — User I/O pin |
| Pino 11 | GND — Ground |
| Pino 12 | I/O — User I/O pin |
| Pino 13 | I/O — User I/O pin |
| Pino 14 | I/O — User I/O pin |
| Pino 15 | I/O — User I/O pin |
| Pino 16 | I/O — User I/O pin |
| Pino 17 | I/O — User I/O pin |
| Pino 18 | I/O — User I/O pin |
| Pino 19 | I/O — User I/O pin |
| Pino 20 | I/O — User I/O pin |
| Pino 21 | GND — Ground |
| Pino 22 | I/O — User I/O pin |
| Pino 23 | I/O — User I/O pin |
| Pino 24 | I/O — User I/O pin |
| Pino 25 | I/O — User I/O pin |
| Pino 26 | I/O — User I/O pin |
| Pino 27 | I/O — User I/O pin |
| Pino 28 | I/O — User I/O pin |
| Pino 29 | I/O — User I/O pin |
| Pino 30 | I/O — User I/O pin |
| Pino 31 | VCCIO — I/O supply voltage |
| Pino 32 | I/O — User I/O pin |
| Pino 33 | I/O — User I/O pin |
| Pino 34 | I/O — User I/O pin |
| Pino 35 | I/O — User I/O pin |
| Pino 36 | I/O — User I/O pin |
| Pino 37 | I/O — User I/O pin |
| Pino 38 | I/O — User I/O pin |
| Pino 39 | GND — Ground |
| Pino 40 | I/O — User I/O pin |
| Pino 41 | I/O — User I/O pin |
| Pino 42 | I/O — User I/O pin |
| Pino 43 | I/O — User I/O pin |
| Pino 44 | I/O — User I/O pin |
| Pino 45 | I/O — User I/O pin |
| Pino 46 | I/O — User I/O pin |
| Pino 47 | I/O — User I/O pin |
| Pino 48 | I/O — User I/O pin |
| Pino 49 | I/O — User I/O pin |
| Pino 50 | I/O — User I/O pin |
| Pino 51 | I/O — User I/O pin |
| Pino 52 | I/O — User I/O pin |
| Pino 53 | TDI — JTAG Test Data In (IEEE 1149.1) |
| Pino 54 | TMS — JTAG Test Mode Select |
| Pino 55 | TCK — JTAG Test Clock |
| Pino 56 | TDO — JTAG Test Data Out |
| Pino 57 | I/O — User I/O pin |
| Pino 58 | I/O — User I/O pin |
| Pino 59 | GND — Ground |
| Pino 60 | I/O — User I/O pin |
| Pino 61 | I/O — User I/O pin |
| Pino 62 | I/O — User I/O pin |
| Pino 63 | I/O — User I/O pin |
| Pino 64 | I/O — User I/O pin |
| Pino 65 | I/O — User I/O pin |
| Pino 66 | I/O — User I/O pin |
| Pino 67 | I/O — User I/O pin |
| Pino 68 | I/O — User I/O pin |
| Pino 69 | I/O — User I/O pin |
| Pino 70 | I/O — User I/O pin |
| Pino 71 | I/O — User I/O pin |
| Pino 72 | I/O — User I/O pin |
| Pino 73 | VCCINT — Internal supply voltage (4.75V-5.25V) |
| Pino 74 | I/O — User I/O pin |
| Pino 75 | I/O — User I/O pin |
| Pino 76 | I/O — User I/O pin |
| Pino 77 | I/O — User I/O pin |
| Pino 78 | I/O — User I/O pin |
| Pino 79 | I/O — User I/O pin |
| Pino 80 | I/O — User I/O pin |
| Pino 81 | I/O — User I/O pin |
| Pino 82 | GND — Ground |
| Pino 83 | I/O — User I/O pin |
| Pino 84 | I/O — User I/O pin |
| Pino 85 | I/O — User I/O pin |
| Pino 86 | I/O — User I/O pin |
| Pino 87 | I/O — User I/O pin |
| Pino 88 | I/O — User I/O pin |
| Pino 89 | I/O — User I/O pin |
| Pino 90 | I/O — User I/O pin |
| Pino 91 | I/O — User I/O pin |
| Pino 92 | I/O — User I/O pin |
| Pino 93 | I/O — User I/O pin |
| Pino 94 | I/O — User I/O pin |
| Pino 95 | VCCIO — I/O supply voltage |
| Pino 96 | I/O — User I/O pin |
| Pino 97 | I/O — User I/O pin |
| Pino 98 | I/O — User I/O pin |
| Pino 99 | I/O — User I/O pin |
| Pino 100 | I/O — User I/O pin |
| Pino 101 | I/O — User I/O pin |
| Pino 102 | I/O — User I/O pin |
| Pino 103 | I/O — User I/O pin |
| Pino 104 | GND — Ground |
| Pino 105 | I/O — User I/O pin |
| Pino 106 | I/O — User I/O pin |
| Pino 107 | I/O — User I/O pin |
| Pino 108 | I/O — User I/O pin |
| Pino 109 | I/O — User I/O pin |
| Pino 110 | I/O — User I/O pin |
| Pino 111 | I/O — User I/O pin |
| Pino 112 | I/O — User I/O pin |
| Pino 113 | I/O — User I/O pin |
| Pino 114 | I/O — User I/O pin |
| Pino 115 | I/O — User I/O pin |
| Pino 116 | I/O — User I/O pin |
| Pino 117 | I/O — User I/O pin |
| Pino 118 | I/O — User I/O pin |
| Pino 119 | VCCINT — Internal supply voltage (4.75V-5.25V) |
| Pino 120 | I/O — User I/O pin |
| Pino 121 | I/O — User I/O pin |
| Pino 122 | I/O — User I/O pin |
| Pino 123 | I/O — User I/O pin |
| Pino 124 | I/O — User I/O pin |
| Pino 125 | I/O — User I/O pin |
| Pino 126 | I/O — User I/O pin |
| Pino 127 | I/O — User I/O pin |
| Pino 128 | I/O — User I/O pin |
| Pino 129 | GND — Ground |
| Pino 130 | I/O — User I/O pin |
| Pino 131 | I/O — User I/O pin |
| Pino 132 | I/O — User I/O pin |
| Pino 133 | I/O — User I/O pin |
| Pino 134 | I/O — User I/O pin |
| Pino 135 | I/O — User I/O pin |
| Pino 136 | I/O — User I/O pin |
| Pino 137 | I/O — User I/O pin |
| Pino 138 | I/O — User I/O pin |
| Pino 139 | I/O — User I/O pin |
| Pino 140 | I/O — User I/O pin |
| Pino 141 | I/O — User I/O pin |
| Pino 142 | I/O — User I/O pin |
| Pino 143 | VCCIO — I/O supply voltage |
| Pino 144 | I/O — User I/O pin |
| Pino 145 | I/O — User I/O pin |
| Pino 146 | I/O — User I/O pin |
| Pino 147 | I/O — User I/O pin |
| Pino 148 | I/O — User I/O pin |
| Pino 149 | I/O — User I/O pin |
| Pino 150 | I/O — User I/O pin |
| Pino 151 | I/O — User I/O pin |
| Pino 152 | I/O — User I/O pin |
| Pino 153 | GND — Ground |
| Pino 154 | I/O — User I/O pin |
| Pino 155 | I/O — User I/O pin |
| Pino 156 | I/O — User I/O pin |
| Pino 157 | I/O — User I/O pin |
| Pino 158 | I/O — User I/O pin |
| Pino 159 | I/O — User I/O pin |
| Pino 160 | I/O — User I/O pin |
| Pino 161 | I/O — User I/O pin |
| Pino 162 | I/O — User I/O pin |
| Pino 163 | I/O — User I/O pin |
| Pino 164 | I/O — User I/O pin |
| Pino 165 | I/O — User I/O pin |
| Pino 166 | I/O — User I/O pin |
| Pino 167 | I/O — User I/O pin |
| Pino 168 | I/O — User I/O pin |
| Pino 169 | I/O — User I/O pin |
| Pino 170 | I/O — User I/O pin |
| Pino 171 | I/O — User I/O pin |
| Pino 172 | I/O — User I/O pin |
| Pino 173 | I/O — User I/O pin |
| Pino 174 | I/O — User I/O pin |
| Pino 175 | I/O — User I/O pin |
| Pino 176 | I/O — User I/O pin |
| Pino 177 | I/O — User I/O pin |
| Pino 178 | I/O — User I/O pin |
| Pino 179 | I/O — User I/O pin |
| Pino 180 | I/O — User I/O pin |
| Pino 181 | I/O — User I/O pin |
| Pino 182 | I/O — User I/O pin |
| Pino 183 | I/O — User I/O pin |
| Pino 184 | I/O — User I/O pin |
| Pino 185 | I/O — User I/O pin |
| Pino 186 | I/O — User I/O pin |
| Pino 187 | I/O — User I/O pin |
| Pino 188 | I/O — User I/O pin |
| Pino 189 | I/O — User I/O pin |
| Pino 190 | I/O — User I/O pin |
| Pino 191 | I/O — User I/O pin |
| Pino 192 | I/O — User I/O pin |
| Pino 193 | I/O — User I/O pin |
| Pino 194 | I/O — User I/O pin |
| Pino 195 | I/O — User I/O pin |
| Pino 196 | I/O — User I/O pin |
| Pino 197 | I/O — User I/O pin |
| Pino 198 | I/O — User I/O pin |
| Pino 199 | I/O — User I/O pin |
| Pino 200 | I/O — User I/O pin |
| Pino 201 | I/O — User I/O pin |
| Pino 202 | I/O — User I/O pin |
| Pino 203 | I/O — User I/O pin |
| Pino 204 | I/O — User I/O pin |
| Pino 205 | I/O — User I/O pin |
| Pino 206 | I/O — User I/O pin |
| Pino 207 | I/O — User I/O pin |
| Pino 208 | I/O — User I/O pin |
Aplicações típicas
EPM7256SQC208-15 é adequado para 6 aplicaçãos: Microprocessor Bus-Bridging and Glue Logic, Address Decoding and Chip-Select Generation, Industrial Control State Machines, Telecommunications and Networking Equipment, Replacement of Multiple 74-Series TTL Logic, Legacy Peripheral Interface Bridging.
Microprocessor Bus-Bridging and Glue Logic
The EPM7256SQC208-15 is widely used as 5V glue logic between legacy microprocessors, memory, and peripherals. With 256 macrocells and 164 user I/Os in a 208-pin PQFP, it can decode full 24-32 bit address buses, generate chip selects for ROM/RAM/IO banks, and arbitrate interrupts without external 74-series TTL parts. The 15 ns pin-to-pin delay easily meets the timing of 33 MHz 80C186, 68k, and 80C51 microcontroller buses, while the 5V VCCINT matches standard TTL rails. Non-volatile EEPROM configuration means the CPLD powers up ready to run, eliminating boot PROM cost and complexity. Designers benefit from deterministic timing that simplifies worst-case analysis in safety-critical industrial controllers.
Recomendado
Address Decoding and Chip-Select Generation
The EPM7256SQC208-15 excels at address decoding for embedded systems, generating chip-select signals for memory banks and peripherals from a wide microprocessor address bus. Its 256 macrocells can hold dozens of independent address comparators in parallel, each producing a chip-select with deterministic 15 ns propagation - ideal for asynchronous memory and peripheral interfaces. The 164 user I/Os comfortably handle full 32-bit address plus control signal decoding in 80x86, MIPS, and ARM-based designs. JTAG-boundary-scan support allows in-system reprogramming for late-stage BOM changes, and the non-volatile EEPROM ensures the decoder table survives power cycles without boot memory.
Recomendado
Industrial Control State Machines
In industrial automation, the EPM7256SQC208-15 implements deterministic finite state machines for motor control sequences, safety interlocks, and PLC-style ladder-logic replacement. The 5V tolerance and commercial 0C to +70C operating range suit factory-floor enclosures, while the 16 LAB architecture supports parallel FSMs controlling multiple axes concurrently. The 5000 usable gates and 256 macrocells allow complex sequencer logic - encoder decoding, PWM generation, watchdog timers, and HMI button debouncing - all in a single chip. JTAG ISP enables firmware updates on deployed equipment without removing the CPLD, a key advantage over legacy PAL-based designs.
Recomendado
Telecommunications and Networking Equipment
The EPM7256SQC208-15 was a workhorse in telecom and networking hardware for PCI/CompactPCI bus arbitration, Utopia framing, and TDM bus multiplexing. Its 164 user I/Os and 15 ns delay handle 33 MHz PCI bus signals with margin, while per-macrocell power-down enables low standby current in always-on network appliances. The 208-pin PQFP footprint is shared with companion ASICs and ASSPs from that era, simplifying board layout. Non-volatile configuration prevents misprogramming from network glitches, and JTAG boundary-scan allows remote board-test access during manufacturing.
Recomendado
Replacement of Multiple 74-Series TTL Logic
A single EPM7256SQC208-15 can replace dozens of 74LS, 74HC, and 74FTTL packages on legacy boards, freeing board area and reducing power consumption. With 256 macrocells, designers can consolidate address latches, bus transceivers, parity generators, and interrupt controllers into one 208-pin PQFP IC. The 5V TTL-compatible I/O eliminates level-shifters, and the deterministic 15 ns delay is comparable to 74LS TTL, making timing drop-in compatible. EEPROM-backed configuration survives factory reprogramming cycles, while JTAG ISP allows board-level logic changes during prototyping without re-spinning PCBs.
Recomendado
Legacy Peripheral Interface Bridging
The EPM7256SQC208-15 bridges legacy peripheral interfaces - ISA bus, parallel port, SCSI, IDE - to modern embedded CPUs. With 164 user I/Os, it can multiplex 16-bit ISA data with 24-bit address, plus control signals, in a single device. The 15 ns pin-to-pin delay matches 8 MHz ISA timing, and the 5V tolerance preserves compatibility with legacy peripheral cards. Designers use macrocell-based tri-state buffers to implement bidirectional bus transceivers with arbitration, replacing multiple 74F245/74F244 chips. Non-volatile configuration means the bridge logic is ready instantly at power-up, critical for boot-time peripheral access.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para EPM7256SQC208-15 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | EPM7256SQC208-10 | EPM7256SQC208-7 | EPM7256BQC208-7 | EPM7256AQC208-7 | EPM7256SQC208-15N |
|---|---|---|---|---|---|---|
| Brand | Altera (Intel PSG) | Altera (Intel PSG) | Altera (Intel PSG) | Altera (Intel PSG) | Altera (Intel PSG) | Altera (Intel PSG) |
| Package | 208-pin PQFP (28x28 mm) | 208-pin PQFP (28x28 mm) - same | 208-pin PQFP (28x28 mm) - same | 208-pin PQFP (28x28 mm) - same | 208-pin PQFP (28x28 mm) - same | 208-pin PQFP (28x28 mm) - same |
| Pin-to-Pin Delay (tPD) | 15 ns | 10 ns (33% faster) | 7.5 ns (50% faster) | 7.5 ns (50% faster) | 7.5 ns (50% faster) | 15 ns (same) |
| Macrocells | 256 | 256 | 256 | 256 | 256 | 256 |
| Logic Array Blocks (LABs) | 16 | 16 | 16 | 16 | 16 | 16 |
| Usable Gates | 5000 | 5000 | 5000 | 5000 | 5000 | 5000 |
| User I/O Pins | 164 | 164 | 164 | 164 | 164 | 164 |
| Supply Voltage (VCCINT) | 4.75V - 5.25V | 4.75V - 5.25V | 4.75V - 5.25V | 4.75V - 5.25V | 4.75V - 5.25V | 4.75V - 5.25V |
| Operating Temperature | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) |
| Silicon Revision / Family Variant | MAX 7000S (S-series, ISP) | MAX 7000S (same family) | MAX 7000S (same family) | MAX 7000 (B-step, no ISP) | MAX 7000 (A-step, no ISP) | MAX 7000S (same family, lead-free) |
Principais diferenciais
- Industry-standard MAX 7000S in-system programmability (vs EPM7256BQC208-7)
- Cost-optimized speed grade with full macrocell count (vs EPM7256SQC208-10)
- PQFP package availability for legacy board reuse (vs EPM7256SQC208-15N)
Notas de projeto
Provide separate decoupling for VCCINT (4.75V-5.25V) and VCCIO rails with 0.1 uF ceramic capacitors placed within 5 mm of each supply pin. The 208-pin PQFP package has multiple VCC/GND pins distributed across all four quadrants to maintain signal integrity for the 164 user I/Os. A bulk 10-100 uF tantalum or aluminum electrolytic capacitor on each rail handles transient current demand during simultaneous output switching. Keep digital ground returns short and use a solid ground plane beneath the PQFP footprint to minimize VCC bounce on heavily loaded outputs.
The 208-pin PQFP package uses 0.5 mm lead pitch and requires careful PCB layout: 0.15-0.20 mm trace width, 0.15 mm trace spacing, and matched-length routing for critical clock or JTAG signals. Per the MAX 7000 datasheet family layout guidelines, fan-out traces on inner PCB layers should use via-in-pad or near-pad stitching to escape the fine-pitch gull-wing leads. Place the JTAG header (TDI/TMS/TCK/TDO) within 50 mm of the device to keep the boundary-scan chain reliable. Maintain continuous ground plane under the package thermal pad region even though PQFP does not have an exposed pad.
The EPM7256SQC208-15 outputs are TTL-compatible with 24 mA drive strength, suitable for driving terminated 5V buses but care must be taken with simultaneous switching outputs (SSO). Limit the number of simultaneously switching outputs to one LAB (16 macrocells) where possible to control ground bounce. For high-speed buses (>33 MHz), use 22-33 ohm series damping resistors on heavily loaded outputs to reduce ringing. The 15 ns pin-to-pin delay sets a maximum toggle frequency of approximately 33 MHz for registered signals and approximately 50 MHz for combinational paths under ideal conditions.
Do not confuse the speed-grade suffix with macrocell count: the '-15' denotes 15 ns tPD, not 1500 gates. EPM7256 has 256 macrocells regardless of speed grade. Also note that older MAX 7000 (non-S) variants like EPM7256AQC208-7 and EPM7256BQC208-7 lack in-system programmability and require a standalone programmer, while MAX 7000S parts (with the 'S' suffix) support JTAG ISP. When migrating designs between revisions, verify with Altera/Intel MAX+PLUS II legacy software since modern Quartus versions may not support the original MAX 7000 family.
Informações de conformidade
Per Altera-Price.com listing, EPM7256SQC208-15 contains lead and is RoHS non-compliant in the standard variant. The 'N' suffix variant (EPM7256SQC208-15N) is lead-free reflow-compatible. AEC-Q100 not applicable for legacy commercial-grade CPLD.
