EPM3256AFC256-10N - 5K Gate 256-Macro MAX 3000A CPLD | Altera
MPN: EPM3256AFC256-10N ✗ Cuối đờiEPM3256AFC256-10N Tóm tắt
A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic device that combines multiple PAL/GAL-style macrocell arrays with a central interconnect matrix. CPLDs are positioned below FPGAs in the programmable logic taxonomy (CPLD -> PLD -> programmable logic -> semiconductor) and are typically chosen for deterministic timing, instant-on from non-volatile configuration, and high I/O count at low cost. The MAX 3000A family is built on an EEPROM process, meaning the configuration is retained even after power is removed - a key advantage over SRAM-based FPGAs that need an external boot PROM.
Key differentiating features include 3.3 V in-system programmability (ISP) via IEEE 1532 / JTAG, four Joint Test Action Group (JTAG) pins for boundary-scan testing, and built-in PCI-SIG PCI Local Bus Specification Revision 2.2 compliance at the -10 speed grade. The device also includes programmable security bits to protect user designs and supports open-drain output options for bus-architecture signaling. Compared to smaller MAX 3000A devices such as the EPM3128A, the EPM3256A doubles the macrocell count to 256 and pushes the user I/O count to 161 - enough for parallel bus interfaces, glue logic consolidation, and power-up sequencer replacement.
Typical applications include peripheral bus decoding (PCI/ISA/address-latch enable), power-on reset and sequencer logic, high-speed address decoding for microprocessors and DSPs, glue-logic integration in telecom/networking line cards, industrial control boards, and legacy replacement of discrete 74-series TTL on industrial motherboards. Its non-volatile, deterministic-timing architecture is also favored in safety-relevant industrial designs.
Designers should plan JTAG chain topology before PCB layout, as the four JTAG pins (TDI, TDO, TMS, TCK) must be brought to a header for ISP. Decoupling follows Altera's recommendation of 0.1 uF and 0.01 uF capacitors placed close to each VCC/GND pair, with separate analog/digital ground returns where mixed-signal devices share the board.
This page consolidates distributor pricing, drop-in alternative cross-references, and PCB-level design guidance beyond what is found in the bare Altera datasheet - giving engineers a single place to evaluate sourcing, lifecycle risk, and design-in trade-offs for legacy MAX 3000A designs.
Bộ thay thế dễ dàng lắp đặt cho EPM3256AFC256-10N — 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 EPM3256AFC256-10N (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Propagation Delay (tPD), In-System Programmability, Process Technology.
EPM3256AFC256-10
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM3128AFC256-7N
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM3128AFI256-10N
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM1270F256C5N
✅ Drop-In✗ Hết hàng
$16.2 / Đơn vị
Xem tài liệu →EPM2210F256C5N
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM3256AFC256-10N Tỷ lệ tối đa & tính chất điện
| Family | MAX 3000A |
| Device Type | CPLD (Complex Programmable Logic Device) |
| Usable Gates | 5,000 gates |
| Macrocells | 256 |
| Maximum User I/O | 161 |
| Pin-to-Pin Logic Delay | 10 ns |
| Maximum Counter Frequency | 227.3 MHz |
| Core Voltage | 3.3 V |
| I/O Logic Level Compatibility | 5.0 V / 3.3 V / 2.5 V (MultiVolt) |
| Programmability | EEPROM, in-system programmable (ISP) |
| JTAG Interface | IEEE 1532 / JTAG (TDI, TDO, TMS, TCK) |
| Hộp | 256-pin FineLine BGA |
| Logic Family | CMOS |
| PCI Compliance | PCI Local Bus Specification Rev 2.2 (at -10 grade) |
| Nhiệt độ hoạt động | 0 C to 70 C (commercial) |
Cấu hình chân EPM3256AFC256-10N
| Chân A1 | I/O — User I/O (bank 1) |
| Chân A2 | I/O — User I/O (bank 1) |
| Chân A3 | I/O — User I/O (bank 1) |
| Chân A4 | I/O — User I/O (bank 1) |
| Chân A5 | I/O — User I/O (bank 1) |
| Chân A6 | VCCINT — 3.3 V core supply |
| Chân A7 | GND — Ground |
| Chân A8 | TDI — JTAG Test Data In |
| Chân A9 | TMS — JTAG Test Mode Select |
| Chân A10 | TCK — JTAG Test Clock |
| Chân A11 | I/O — User I/O (bank 2) |
| Chân A12 | I/O — User I/O (bank 2) |
| Chân A13 | I/O — User I/O (bank 2) |
| Chân A14 | VCCIO2 — I/O bank 2 reference supply |
| Chân A15 | I/O — User I/O (bank 2) |
| Chân A16 | I/O — User I/O (bank 2) |
| Chân B1 | GND — Ground |
| Chân B16 | I/O — User I/O (bank 2) |
| Chân TDO | TDO — JTAG Test Data Out |
| Chân EP | GND — Exposed center pad - thermal/ground bond (per datasheet) |
Ứng dụng tiêu biểu
EPM3256AFC256-10N phù hợp cho 6 Áp dụngs: PCI Bus Address Decoding and Glue Logic, Power-On Reset and Multi-Rail Sequencer, Microprocessor Address/Data Bus Interface Bridge, DSP / Microprocessor Address Decoder and Chip-Select Generator, Legacy Industrial Control Board Consolidation, Telecom Line-Card Glue Logic and Test Access.
PCI Bus Address Decoding and Glue Logic
The EPM3256AFC256-10N's 10 ns pin-to-pin delay and 161 user I/Os make it well suited as the central glue-logic device on legacy PCI add-in cards and backplanes. The -10 speed grade meets PCI Local Bus Specification Revision 2.2 timing, while the 256 macrocells can absorb a full 32-bit address decoder, chip-select generator, and interrupt steering matrix in one device.
Được đề xuất
Power-On Reset and Multi-Rail Sequencer
In telecom and industrial boards, the EPM3256AFC256-10N replaces dozens of 74-series TTL gates by implementing voltage-rail sequencing, POR delays, and reset distribution in one non-volatile part. The EEPROM-based configuration means outputs settle to known states within microseconds of VCC ramp - faster than any SRAM FPGA - which is critical for processor and DSP supply rails that must come up in a specific order.
Được đề xuất
Microprocessor Address/Data Bus Interface Bridge
The 161 user I/Os and 3.3 V MultiVolt I/O make the EPM3256AFC256-10N ideal as a bus-bridge between legacy 5 V microprocessors and modern 3.3 V peripherals or memories. It can latch, multiplex, or transpose address and data buses without external bus drivers, eliminating 2-3 octal transceiver ICs per port. The 10 ns tPD safely meets 50 MHz bus timing with adequate margin.
Được đề xuất
DSP / Microprocessor Address Decoder and Chip-Select Generator
DSP systems require precise, glitch-free chip-select generation for external SRAM, Flash, and peripheral chips. The EPM3256AFC256-10N's 256 macrocells can decode the full 24-bit address space of typical DSPs while the 227.3 MHz maximum counter frequency supports fast memory-cycle generation. Predictable combinational delay (10 ns worst-case) eliminates address-decode glitches that cause memory corruption in discrete-logic decoders.
Được đề xuất
Legacy Industrial Control Board Consolidation
On long-life industrial motherboards (CNC, PLC, motor drives), the EPM3256AFC256-10N replaces 10-20 discrete 74HC/74LS logic packages, reducing board area and improving long-term reliability. Its 0 C to +70 C commercial temperature range suits most factory-floor enclosures, while the EEPROM-based design holds configuration through power cycles without an external boot PROM.
Được đề xuất
Telecom Line-Card Glue Logic and Test Access
The EPM3256AFC256-10N's JTAG (IEEE 1149.1) support, 5V-tolerant I/O, and high I/O count suit telecom line-card applications as the central test-access and signal-routing hub. Designers use it to mux between operational and diagnostic modes, implement BERT loopbacks, and consolidate framer/serializer select logic - tasks that previously required multiple 74-series packages.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EPM3256AFC256-10N — 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 | EPM3256AFC256-10 | EPM3128AFC256-7N | EPM3128AFI256-10N | EPM1270F256C5N | EPM2210F256C5N |
|---|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera | Altera |
| Package | 256-ball FineLine BGA | 256-ball FineLine BGA - same | 256-ball FineLine BGA - same | 256-ball FineLine BGA - same | 256-ball FineLine BGA - same | 256-ball FineLine BGA - same |
| Family | MAX 3000A | MAX 3000A | MAX 3000A | MAX 3000A | MAX V | MAX V |
| Macrocells | 256 | 256 | 128 | 128 | 980 | 1700 |
| Pin-to-Pin Delay | 10 ns | 10 ns | 7.5 ns | 10 ns | 5.0 ns | 5.0 ns |
| Core Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 1.8 V | 1.8 V |
| Temperature Grade | Commercial 0 to 70 C | Commercial 0 to 70 C | Commercial 0 to 70 C | Industrial -40 to +85 C | Commercial 0 to 70 C | Commercial 0 to 70 C |
| Lead-Free / RoHS | Yes (N suffix) | No (tin-lead finish) | Yes (N suffix) | Yes (N suffix) | Yes (N suffix) | Yes (N suffix) |
| Lifecycle Status | Obsolete (EOL by Intel) | Obsolete | Obsolete | Obsolete | Active | Active |
Bảo phân biệt quan trọng
- Drop-in compatibility with the non-N (tin-lead) variant (vsEPM3256AFC256-10)
- Highest macrocell count of any MAX 3000A device (vsEPM3128AFI256-10N)
- Most I/O of any MAX 3000A BGA option (vsEPM3128AFI256-10N)
Ghi chú thiết kế
Estimated: the EPM3256AFC256-10N requires two supplies - VCCINT (3.3 V core) and VCCIO (per bank, 2.5/3.3/5 V tolerant). Decouple every VCC/VCCIO/GND pair with a 0.1 uF ceramic placed within 5 mm of the package ball. Add a single 10 uF bulk tantalum or ceramic near the VCCINT pin. Unused I/O banks should still have their VCCIO pin tied to a valid voltage, not left floating - per Altera's MAX 3000A datasheet, floating VCCIO can cause I/O behaviour to drift during configuration.
The 256-ball FineLine BGA requires X-ray inspection or proper BGA rework tools - hand soldering is impractical. Plan your JTAG chain order before PCB layout: TCK and TMS need 10 kohm pull-ups to VCCIO, and the chain must include any other JTAG devices between TDI and TDO. A common mistake is to chain the CPLD last; instead, put it first so ISP works even when downstream boundary-scan parts are absent on early prototype builds.
Estimated: at 227 MHz internal counters, output edge rates are 1-2 ns, so keep high-speed outputs (clock, OE, chip-select) on short matched-length traces. Use a continuous ground plane under the BGA and avoid routing signals between BGA balls on inner layers. For PCI applications, the -10 speed grade is at the upper limit of PCI 2.2 timing; route the 33 MHz PCI clock with 50 ohm controlled impedance and length-match it within 250 mils across all loads.
Thông tin tuân thủ
Lead-free finish indicated by 'N' suffix per Altera ordering information. Part is end-of-life as of 2026; new designs should target MAX II / MAX V / MAX 10 CPLDs.
