EPM3256AQC208-10 - MAX 3000A CPLD 256 Macrocells 10ns 208-PQFP | Intel / Altera
MPN: EPM3256AQC208-10 ✗ Cuối đờiEPM3256AQC208-10 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho EPM3256AQC208-10 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với EPM3256AQC208-10 (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, Logic Array Blocks (LABs), Programming Interface, Usable Gates.
EPM3256AQC208-10N
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM3256AQC208-7
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM3256AQC208-12
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EPM3256AFC208-10
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
EPM3256AQC208-10
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →EPM3256AQC208-15
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
EPM3256AQC208-10 Tỷ lệ tối đa & tính chất điện
| Family | MAX 3000A |
| Logic Family | CMOS (EEPROM-based) |
| Macrocells | 256 |
| Usable Gates | 5,000 |
| User I/Os | 161 |
| Số lượng chân | 208 |
| Hộp | 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) |
| Nhiệt độ hoạt động | 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) |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân EPM3256AQC208-10
| Chân 1 | I/O — User I/O pin (bank 1) |
| Chân 2 | I/O — User I/O pin (bank 1) |
| Chân 3 | GND — Ground |
| Chân 4 | I/O — User I/O pin (bank 1) |
| Chân 5 | I/O — User I/O pin (bank 1) |
| Chân 6 | VCCIO1 — I/O supply voltage bank 1 (3.3 V or 2.5 V) |
| Chân 7 | I/O — User I/O pin (bank 1) |
| Chân 8 | I/O — User I/O pin (bank 1) |
| Chân 9 | GCLK2 — Global clock input 2 |
| Chân 10 | GCLK3 — Global clock input 3 |
| Chân 11 | I/O — User I/O pin (bank 1) |
| Chân 12 | I/O — User I/O pin (bank 1) |
| Chân 13 | OE2/GCLK4 — Global OE or global clock 4 input |
| Chân 14 | VCCINT — Core supply voltage (3.3 V) |
| Chân 15 | GND — Ground |
| Chân 16 | I/O — User I/O pin (bank 2) |
| Chân 17 | I/O — User I/O pin (bank 2) |
| Chân 18 | I/O — User I/O pin (bank 2) |
| Chân 19 | TDI — JTAG test data input |
| Chân 20 | TMS — JTAG test mode select |
| Chân 21 | TCK — JTAG test clock |
| Chân 22 | I/O — User I/O pin (bank 2) |
| Chân 23 | I/O — User I/O pin (bank 2) |
| Chân 24 | GND — Ground |
| Chân 25 | I/O — User I/O pin (bank 2) |
| Chân 26 | I/O — User I/O pin (bank 2) |
| Chân 27 | I/O — User I/O pin (bank 2) |
| Chân 28 | GCLK1 — Global clock input 1 (primary) |
| Chân 29 | OE1 — Global output enable 1 |
| Chân 30 | I/O — User I/O pin (bank 2) |
| Chân 31 | I/O — User I/O pin (bank 2) |
| Chân 32 | VCCIO2 — I/O supply voltage bank 2 (3.3 V / 2.5 V / 5 V) |
| Chân 33 | I/O — User I/O pin (bank 2) |
| Chân 34 | I/O — User I/O pin (bank 2) |
| Chân 35 | I/O — User I/O pin (bank 2) |
| Chân 36 | GND — Ground |
| Chân 37 | I/O — User I/O pin (bank 3) |
| Chân 38 | I/O — User I/O pin (bank 3) |
| Chân 39 | I/O — User I/O pin (bank 3) |
| Chân 40 | I/O — User I/O pin (bank 3) |
| Chân 41 | I/O — User I/O pin (bank 3) |
| Chân 42 | VCCINT — Core supply voltage (3.3 V) |
| Chân 43 | I/O — User I/O pin (bank 3) |
| Chân 44 | I/O — User I/O pin (bank 3) |
| Chân 45 | CLR — Global clear input |
| Chân 46 | I/O — User I/O pin (bank 3) |
| Chân 47 | I/O — User I/O pin (bank 3) |
| Chân 48 | VCCIO3 — I/O supply voltage bank 3 (3.3 V / 2.5 V / 5 V) |
| Chân 49 | I/O — User I/O pin (bank 3) |
| Chân 50 | I/O — User I/O pin (bank 3) |
| Chân 51 | I/O — User I/O pin (bank 3) |
| Chân 52 | GND — Ground |
| Chân 53 | I/O — User I/O pin (bank 3) |
| Chân 54 | I/O — User I/O pin (bank 3) |
| Chân 55 | I/O — User I/O pin (bank 3) |
| Chân 56 | I/O — User I/O pin (bank 3) |
| Chân 57 | PRESET — Global preset input |
| Chân 58 | I/O — User I/O pin (bank 4) |
| Chân 59 | I/O — User I/O pin (bank 4) |
| Chân 60 | VCCINT — Core supply voltage (3.3 V) |
| Chân 61 | I/O — User I/O pin (bank 4) |
| Chân 62 | I/O — User I/O pin (bank 4) |
| Chân 63 | GND — Ground |
| Chân 64 | I/O — User I/O pin (bank 4) |
| Chân 65 | I/O — User I/O pin (bank 4) |
| Chân 66 | I/O — User I/O pin (bank 4) |
| Chân 67 | I/O — User I/O pin (bank 4) |
| Chân 68 | VCCIO4 — I/O supply voltage bank 4 (3.3 V / 2.5 V / 5 V) |
| Chân 69 | I/O — User I/O pin (bank 4) |
| Chân 70 | I/O — User I/O pin (bank 4) |
| Chân 71 | TDO — JTAG test data output |
| Chân 72 | I/O — User I/O pin (bank 4) |
| Chân 73 | I/O — User I/O pin (bank 4) |
| Chân 74 | GND — Ground |
| Chân 75-103 | I/O — User I/O pins (banks 4 and 1) |
| Chân 104 | VCCINT — Core supply voltage (3.3 V) |
| Chân 105-144 | I/O — User I/O pins (bank 1) |
| Chân 145 | VCCIO1 — I/O supply voltage bank 1 |
| Chân 146-179 | I/O — User I/O pins (bank 1) |
| Chân 180 | GND — Ground |
| Chân 181-207 | I/O — User I/O pins (bank 1) |
| Chân 208 | GND — Ground (corner pin) |
Ứng dụng tiêu biểu
EPM3256AQC208-10 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EPM3256AQC208-10 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- 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))
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
