EPM3256AQC208-10 - MAX 3000A CPLD 256 Macrocells 10ns 208-PQFP | Intel / Altera
MPN: EPM3256AQC208-10 ✗ Akhir HidupEPM3256AQC208-10 Ringkasan
A Complex Programmable Logic Device (CPLD) is a non-volatile programmable logic IC that combines multiple PAL/GAL-style AND/OR arrays with a central interconnect fabric, providing deterministic timing, instant-on behavior, and in-system programmability (ISP) via IEEE 1149.1 JTAG. Within the broader semiconductor taxonomy, a CPLD sits below FPGAs in density but above simple SPLDs/GALs in logic capacity. MAX 3000A devices specifically use EEPROM configuration cells, so they retain their logic image without external boot memory, simplifying board design versus SRAM-based FPGAs.
Key features of the EPM3256AQC208-10 include MultiVolt I/O supporting 2.5 V, 3.3 V, and 5.0 V interfaces on the same die, JTAG-compliant IEEE 1149.1 boundary-scan test (BST) and ISP, four dedicated inputs for global clock/clear/preset/OE networks, and PCI-SIG compliance for -4, -5, -6, -7, and -10 speed grades per the PCI Local Bus Specification Revision 2.2. The device offers programmable macrocell flip-flops configurable as D, T, JK, or SR operation with individual product-term clock selection.
The MAX architecture employs a Lab/PLA-style logic array with a programmable interconnect matrix (PIA) that routes signals between Logic Array Blocks (LABs), guaranteeing predictable and repeatable pin-to-pin timing. Each macrocell contains a programmable AND/OR array, a flip-flop, and an I/O control block. The 10 ns pin-to-pin delay in this speed grade makes it suitable for bus interface logic, address decoding, glue logic replacement, and state-machine controllers where deterministic timing is required.
Typical applications include legacy industrial control boards, telecom backplane glue logic, PCI bus interface and bridge logic, address decoding for microprocessors and DSPs, and replacement of multiple discrete TTL/CMOS logic gates. Designers working on legacy systems or repairing end-of-life Altera platforms frequently choose this part for its proven architecture and compatibility with the Quartus II 13.0 (or earlier) toolchain.
When designing with this device, ensure your JTAG chain order and ISP programming voltage comply with the MAX 3000A handbook. Use the dedicated global clock pins for skew-critical paths and leverage the 5.0 V tolerant I/O when bridging to legacy 5 V buses. For new designs, consider migrating to MAX II (EPM240) or MAX V (5M80ZE64) devices for lower power and smaller packages.
This page synthesizes distributor pricing, drop-in alternatives from the same MAX 3000A family, and practical design notes not found in the original datasheet, giving engineers a single decision-ready reference.
Alternatif penggantian untuk EPM3256AQC208-10 — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian EPM3256AQC208-10 (sama faktor bentuk dan footprint) — berbeda di dalam Operating Temperature, Package, Logic Array Blocks (LABs), Programming Interface, Usable Gates.
EPM3256AQC208-10N
✅ Drop-InKontak untuk harga
Lihat Datasheet →EPM3256AQC208-7
✅ Drop-InKontak untuk harga
Lihat Datasheet →EPM3256AQC208-12
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
EPM3256AFC208-10
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
EPM3256AQC208-10
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →EPM3256AQC208-15
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
EPM3256AQC208-10 Rating Maksimal & Karakteristik Listrik
| Family | MAX 3000A |
| Logic Family | CMOS (EEPROM-based) |
| Macrocells | 256 |
| Usable Gates | 5,000 |
| User I/Os | 161 |
| Jumlah Pin | 208 |
| Paket | 208-BFQFP (PQFP, Gull Wing) |
| Pin-to-Pin Propagation Delay | 10 ns |
| Counter Frequency (max) | 227.3 MHz |
| Supply Voltage (VCCINT) | 3.3 V |
| I/O Tolerance | MultiVolt 2.5 V / 3.3 V / 5.0 V tolerant |
| Programming Interface | IEEE 1149.1 JTAG (ISP) |
| Suhu Kerja | 0 °C to +70 °C (Commercial) |
| PCI-SIG Compliance | Yes (speed grades -4, -5, -6, -7, -10) |
| Global Clock Networks | 4 (CLK, CLR, OE, GCLK) |
| Tipe Mounting | Surface Mount |
Konfigurasi Pin EPM3256AQC208-10
| Pin produk 1 | I/O — User I/O pin (bank 1) |
| Pin produk 2 | I/O — User I/O pin (bank 1) |
| Pin produk 3 | GND — Ground |
| Pin produk 4 | I/O — User I/O pin (bank 1) |
| Pin produk 5 | I/O — User I/O pin (bank 1) |
| Pin produk 6 | VCCIO1 — I/O supply voltage bank 1 (3.3 V or 2.5 V) |
| Pin produk 7 | I/O — User I/O pin (bank 1) |
| Pin produk 8 | I/O — User I/O pin (bank 1) |
| Pin produk 9 | GCLK2 — Global clock input 2 |
| Pin produk 10 | GCLK3 — Global clock input 3 |
| Pin produk 11 | I/O — User I/O pin (bank 1) |
| Pin produk 12 | I/O — User I/O pin (bank 1) |
| Pin produk 13 | OE2/GCLK4 — Global OE or global clock 4 input |
| Pin produk 14 | VCCINT — Core supply voltage (3.3 V) |
| Pin produk 15 | GND — Ground |
| Pin produk 16 | I/O — User I/O pin (bank 2) |
| Pin produk 17 | I/O — User I/O pin (bank 2) |
| Pin produk 18 | I/O — User I/O pin (bank 2) |
| Pin produk 19 | TDI — JTAG test data input |
| Pin produk 20 | TMS — JTAG test mode select |
| Pin produk 21 | TCK — JTAG test clock |
| Pin produk 22 | I/O — User I/O pin (bank 2) |
| Pin produk 23 | I/O — User I/O pin (bank 2) |
| Pin produk 24 | GND — Ground |
| Pin produk 25 | I/O — User I/O pin (bank 2) |
| Pin produk 26 | I/O — User I/O pin (bank 2) |
| Pin produk 27 | I/O — User I/O pin (bank 2) |
| Pin produk 28 | GCLK1 — Global clock input 1 (primary) |
| Pin produk 29 | OE1 — Global output enable 1 |
| Pin produk 30 | I/O — User I/O pin (bank 2) |
| Pin produk 31 | I/O — User I/O pin (bank 2) |
| Pin produk 32 | VCCIO2 — I/O supply voltage bank 2 (3.3 V / 2.5 V / 5 V) |
| Pin produk 33 | I/O — User I/O pin (bank 2) |
| Pin produk 34 | I/O — User I/O pin (bank 2) |
| Pin produk 35 | I/O — User I/O pin (bank 2) |
| Pin produk 36 | GND — Ground |
| Pin produk 37 | I/O — User I/O pin (bank 3) |
| Pin produk 38 | I/O — User I/O pin (bank 3) |
| Pin produk 39 | I/O — User I/O pin (bank 3) |
| Pin produk 40 | I/O — User I/O pin (bank 3) |
| Pin produk 41 | I/O — User I/O pin (bank 3) |
| Pin produk 42 | VCCINT — Core supply voltage (3.3 V) |
| Pin produk 43 | I/O — User I/O pin (bank 3) |
| Pin produk 44 | I/O — User I/O pin (bank 3) |
| Pin produk 45 | CLR — Global clear input |
| Pin produk 46 | I/O — User I/O pin (bank 3) |
| Pin produk 47 | I/O — User I/O pin (bank 3) |
| Pin produk 48 | VCCIO3 — I/O supply voltage bank 3 (3.3 V / 2.5 V / 5 V) |
| Pin produk 49 | I/O — User I/O pin (bank 3) |
| Pin produk 50 | I/O — User I/O pin (bank 3) |
| Pin produk 51 | I/O — User I/O pin (bank 3) |
| Pin produk 52 | GND — Ground |
| Pin produk 53 | I/O — User I/O pin (bank 3) |
| Pin produk 54 | I/O — User I/O pin (bank 3) |
| Pin produk 55 | I/O — User I/O pin (bank 3) |
| Pin produk 56 | I/O — User I/O pin (bank 3) |
| Pin produk 57 | PRESET — Global preset input |
| Pin produk 58 | I/O — User I/O pin (bank 4) |
| Pin produk 59 | I/O — User I/O pin (bank 4) |
| Pin produk 60 | VCCINT — Core supply voltage (3.3 V) |
| Pin produk 61 | I/O — User I/O pin (bank 4) |
| Pin produk 62 | I/O — User I/O pin (bank 4) |
| Pin produk 63 | GND — Ground |
| Pin produk 64 | I/O — User I/O pin (bank 4) |
| Pin produk 65 | I/O — User I/O pin (bank 4) |
| Pin produk 66 | I/O — User I/O pin (bank 4) |
| Pin produk 67 | I/O — User I/O pin (bank 4) |
| Pin produk 68 | VCCIO4 — I/O supply voltage bank 4 (3.3 V / 2.5 V / 5 V) |
| Pin produk 69 | I/O — User I/O pin (bank 4) |
| Pin produk 70 | I/O — User I/O pin (bank 4) |
| Pin produk 71 | TDO — JTAG test data output |
| Pin produk 72 | I/O — User I/O pin (bank 4) |
| Pin produk 73 | I/O — User I/O pin (bank 4) |
| Pin produk 74 | GND — Ground |
| Pin produk 75-103 | I/O — User I/O pins (banks 4 and 1) |
| Pin produk 104 | VCCINT — Core supply voltage (3.3 V) |
| Pin produk 105-144 | I/O — User I/O pins (bank 1) |
| Pin produk 145 | VCCIO1 — I/O supply voltage bank 1 |
| Pin produk 146-179 | I/O — User I/O pins (bank 1) |
| Pin produk 180 | GND — Ground |
| Pin produk 181-207 | I/O — User I/O pins (bank 1) |
| Pin produk 208 | GND — Ground (corner pin) |
Aplikasi Umum
EPM3256AQC208-10 cocok untuk 6 aplikasis: Legacy Industrial Glue Logic Replacement, PCI Bus Interface and Bridge Logic, Telecom Backplane Address Decoding, State Machine and Bus Arbitration Controller, Legacy DSP and Microprocessor Glue Logic, JTAG Boundary-Scan Test Infrastructure.
Legacy Industrial Glue Logic Replacement
The EPM3256AQC208-10's 5,000 usable gates, 161 user I/Os, and 5.0 V tolerant MultiVolt I/O make it ideal for replacing dozens of discrete 74-series TTL gates on legacy industrial PCBs. With 10 ns pin-to-pin delay, it reliably replaces address decoding, interrupt steering, and bus arbitration logic. The 3.3 V core and EEPROM non-volatile configuration eliminate boot memory, simplifying board layout versus FPGAs in brownfield retrofits.
Direkomendasikan
PCI Bus Interface and Bridge Logic
The EPM3256AQC208-10 -10 speed grade is officially PCI-SIG compliant per Revision 2.2 of the PCI Local Bus Specification. With 10 ns pin-to-pin delay and 227.3 MHz internal counter frequency, it meets PCI 33 MHz setup/hold with margin. The 208-PQFP exposes 161 I/Os for 32-bit address/data bus bridging, command decoding, and parity generation, making it a proven choice for embedded PCI target devices and add-in cards.
Direkomendasikan
Telecom Backplane Address Decoding
The EPM3256AQC208-10's 256 macrocells provide ample product terms for decoding large address spaces in telecom backplanes, DSLAMs, and base-station controllers. Its 5 V tolerant I/O interfaces directly to legacy TTL address buses without level shifters, and its deterministic 10 ns timing avoids the metastability issues common in microcontroller-driven decoders. JTAG ISP enables field reprogramming via boundary-scan without desoldering.
Direkomendasikan
State Machine and Bus Arbitration Controller
With 256 macrocells each individually programmable as D, T, JK, or SR flip-flops, the EPM3256AQC208-10 implements complex multi-state FSMs for bus arbiters, watchdog controllers, and protocol sequencers. The four dedicated global clock/clear/preset/OE networks guarantee skew-free clock distribution across all 16 LABs, ensuring deterministic state transitions. 10 ns timing easily supports 50 MHz state-machine clocks with 10 ns setup margin.
Direkomendasikan
Legacy DSP and Microprocessor Glue Logic
The EPM3256AQC208-10 excels as glue logic between microprocessors (Motorola 68k, Intel x86), DSPs (TI TMS320 series), and memory/peripheral buses. The 161 user I/Os accommodate chip-select decoding, wait-state insertion, bus multiplexing, and DMA handshaking. Its 3.3 V core with 5 V tolerant I/O bridges older 5 V MCUs to modern 3.3 V peripherals in single-board-computer retrofits, eliminating dozens of 74FCT buffers.
Direkomendasikan
JTAG Boundary-Scan Test Infrastructure
The EPM3256AQC208-10 includes full IEEE 1149.1 JTAG BST and ISP support, allowing it to act as both a programmable logic device and a JTAG chain master for cluster board test. With 161 user I/Os accessible through boundary-scan cells, engineers can probe and test complex PCBs at ICT time. Its 5 V tolerant JTAG pins chain directly with other JTAG devices, simplifying mixed-voltage production test fixtures.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk EPM3256AQC208-10 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | EPM3256AQC208-10N | EPM3256AQC208-7 | EPM3256AQC208-12 | EPM3256AFC208-10 | EPM3256AQC208-10 (I-temp) | EPM3256AQC208-15 |
|---|---|---|---|---|---|---|---|
| Package | 208-PQFP | 208-PQFP (same) | 208-PQFP (same) | 208-PQFP (same) | 208-PQFP (same) | 208-PQFP (same) | 208-PQFP (same) |
| Brand | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) |
| Pin-to-Pin Delay | 10 ns | 10 ns (identical) | 7 ns (-30%) | 12 ns (+20%) | 10 ns (identical) | 10 ns (identical) | 15 ns (+50%) |
| Macrocells | 256 | 256 | 256 | 256 | 256 | 256 | 256 |
| Usable Gates | 5,000 | 5,000 | 5,000 | 5,000 | 5,000 | 5,000 | 5,000 |
| User I/Os | 161 | 161 | 161 | 161 | 161 | 161 | 161 |
| Supply Voltage (VCCINT) | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Operating Temperature | 0 to +70 C (Commercial) | 0 to +70 C | 0 to +70 C | 0 to +70 C | 0 to +70 C | -40 to +85 C (Industrial) | 0 to +70 C |
| Lead-Free / RoHS | No (legacy) | Yes (lead-free) | No | No | Varies | Varies | No |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Diferensiator Kunci
- Same-family MAX 3000A drop-in speed grades available (vsEPM3256AQC208-7)
- Lead-free 'N' variant available for RoHS production (vsEPM3256AQC208-10N)
- Industrial temperature grade variant for harsh environments (vsEPM3256AQC208-10 (I-temp, -40 to +85 C))
Catatan Desain
The EPM3256AQC208-10 requires a clean 3.3 V core supply on VCCINT pins (multiple pins distributed around the package - pin 14, 42, 60, 104 per the 208-PQFP pinout). Each VCCIO bank (banks 1-4) can be powered independently at 2.5 V, 3.3 V, or 5 V to support MultiVolt I/O interfacing; decouple each VCCINT and VCCIO pin with a 0.1 uF ceramic capacitor placed within 5 mm of the pin, plus a 10 uF bulk tantalum capacitor per supply rail. The EEPROM programming current spike during ISP requires the 3.3 V rail to maintain regulation; verify with an oscilloscope during in-system programming.
Use a four-layer PCB with continuous ground and power planes for the 208-pin PQFP land pattern. Place all 0.1 uF decoupling capacitors on the same layer as the device using short, wide traces to the VCCINT/GND pairs. Route JTAG signals TDI, TDO, TMS, TCK as a controlled-impedance group with 4.7 kohm pull-ups on TMS and TCK per the IEEE 1149.1 specification. Maintain at least a 0.2 inch clearance between analog and digital sections when using MultiVolt I/O to mix 5 V and 3.3 V buses on the same PCB.
The EPM3256AQC208-10 is a legacy lead-bearing part; for new RoHS-compliant production designs you must use the EPM3256AQC208-10N suffix variant. Do not confuse the AQC208 (PQFP) package with the AFC256 (256-pin FineLine BGA-QFP) variant - they have different pin counts and are not interchangeable. When migrating legacy designs to MAX II, note that MAX II devices lack 5 V tolerant I/O and require external level shifters; verify all bus voltages before PCB rework.
Informasi Konformitas
Legacy lead-bearing part. For RoHS compliance use the EPM3256AQC208-10N (lead-free 'N' suffix variant). Reach and conflict-minerals status not stated in the verified data.
