EPM7256ATI144-10N - 256-Macrocell MAX 7000A CPLD, 144-TQFP | Altera
MPN: EPM7256ATI144-10N ⚠ Lần mua cuốiEPM7256ATI144-10N Tóm tắt
A CPLD (Complex Programmable Logic Device) is a non-volatile, flash- or EEPROM-based programmable logic device that implements combinational and registered logic in a deterministic, predictable architecture. CPLDs sit hierarchically between simple SPLDs (e.g., GAL/PAL) and higher-density FPGAs, offering instant-on behavior, robust I/O structures, and high-drive capability suitable for bus interfacing, glue logic, and control-plane state machines.
Key features of the EPM7256ATI144-10N include in-system programmability (ISP) through IEEE Std. 1149.1 JTAG, 3.3V core operation, MultiVolt I/O supporting 2.5V and 3.3V interface levels, a maximum internal operating frequency around 93.5 MHz, and a programmable power-saving mode that reduces quiescent current on unused macrocells. The MAX 7000A architecture uses an EEPROM process that delivers non-volatile configuration, eliminating the need for an external boot PROM.
Technically, the device uses the second-generation Multiple Array MatriX (MAX) architecture with each LAB containing 16 macrocells. Each macrocell provides configurable registers, product-term selection, and programmable I/O control. The interconnect is a continuous, fast routing fabric that delivers predictable, deterministic timing - a defining advantage of CPLDs over SRAM-based FPGAs for control logic.
Typical applications include bus interfacing (PCI, ISA, address decoding), state-machine and sequencer designs, I/O expansion for microcontrollers and DSPs, glue logic replacement of discrete 74-series TTL, and industrial-control boards requiring non-volatile instant-on logic. It is widely used in telecom line cards, factory-automation controllers, and legacy embedded-system upgrades.
When designing with the EPM7256A, observe the MultiVolt I/O supply guidance: VCCIO must be tied to the voltage level of the devices it interfaces with, while VCCINT must always be 3.3V. The industrial temperature grade (-40C to +85C) supports harsh-environment deployment.
This page synthesizes distributor pricing, drop-in same-package alternatives from the MAX 7000A and MAX 7000S families, and design notes not consolidated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho EPM7256ATI144-10N — 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 EPM7256ATI144-10N (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, Programming Interface, Maximum Internal Frequency, Usable Gates.
EPM7256AETI144-10N
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EPM7256AETI144-7N
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM7256AETC144-10N
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →EPM7256AETC144-7N
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM7256AETC144-5N
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →EPM7256AETC144-10
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →EPM7256ATI144-10N Tỷ lệ tối đa & tính chất điện
| Family | MAX 7000A |
| Device Type | CPLD (Complex Programmable Logic Device) |
| Macrocells | 256 |
| Logic Array Blocks (LABs) | 16 |
| Usable Gates | 5,000 |
| Pin-to-Pin Delay | 10 ns |
| Maximum Internal Frequency | 93.5 MHz |
| Supply Voltage VCCINT | 3.3 V |
| MultiVolt I/O Voltage VCCIO | 2.5 V or 3.3 V |
| Programming Method | IEEE Std. 1149.1 JTAG (ISP) |
| Non-volatile Configuration | Yes (EEPROM) |
| Hộp | TQFP-144 |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
Cấu hình chân EPM7256ATI144-10N
| Chân 1 | I/O — User I/O (bank 1) |
| Chân 2 | I/O — User I/O (bank 1) |
| Chân 3 | I/O — User I/O (bank 1) |
| Chân 4 | I/O — User I/O (bank 1) |
| Chân 5 | I/O — User I/O (bank 1) |
| Chân 6 | I/O — User I/O (bank 1) |
| Chân 7 | I/O — User I/O (bank 1) |
| Chân 8 | I/O — User I/O (bank 1) |
| Chân 9 | GND — Ground |
| Chân 10 | I/O — User I/O (bank 1) |
| Chân 11 | I/O — User I/O (bank 1) |
| Chân 12 | I/O — User I/O (bank 1) |
| Chân 13 | I/O — User I/O (bank 1) |
| Chân 14 | TDI — JTAG Test Data In |
| Chân 15 | TMS — JTAG Test Mode Select |
| Chân 16 | TCK — JTAG Test Clock |
| Chân 17 | I/O — User I/O (bank 1) |
| Chân 18 | I/O — User I/O (bank 1) |
| Chân 19 | I/O — User I/O (bank 1) |
| Chân 20 | I/O — User I/O (bank 1) |
| Chân 21 | I/O — User I/O (bank 1) |
| Chân 22 | I/O — User I/O (bank 1) |
| Chân 23 | I/O — User I/O (bank 1) |
| Chân 24 | I/O — User I/O (bank 1) |
| Chân 25 | I/O — User I/O (bank 1) |
| Chân 26 | I/O — User I/O (bank 1) |
| Chân 27 | I/O — User I/O (bank 1) |
| Chân 28 | I/O — User I/O (bank 1) |
| Chân 29 | I/O — User I/O (bank 1) |
| Chân 30 | VCCINT — Core supply 3.3V |
| Chân 31 | I/O — User I/O (bank 1) |
| Chân 32 | I/O — User I/O (bank 1) |
| Chân 33 | I/O — User I/O (bank 1) |
| Chân 34 | I/O — User I/O (bank 1) |
| Chân 35 | GND — Ground |
| Chân 36 | I/O — User I/O (bank 1) |
| Chân 37 | I/O — User I/O (bank 2) |
| Chân 38 | I/O — User I/O (bank 2) |
| Chân 39 | I/O — User I/O (bank 2) |
| Chân 40 | I/O — User I/O (bank 2) |
| Chân 41 | I/O — User I/O (bank 2) |
| Chân 42 | I/O — User I/O (bank 2) |
| Chân 43 | I/O — User I/O (bank 2) |
| Chân 44 | I/O — User I/O (bank 2) |
| Chân 45 | VCCIO1 — I/O bank 1 supply (2.5V or 3.3V) |
| Chân 46 | I/O — User I/O (bank 2) |
| Chân 47 | I/O — User I/O (bank 2) |
| Chân 48 | I/O — User I/O (bank 2) |
| Chân 49 | I/O — User I/O (bank 2) |
| Chân 50 | I/O — User I/O (bank 2) |
| Chân 51 | I/O — User I/O (bank 2) |
| Chân 52 | I/O — User I/O (bank 2) |
| Chân 53 | I/O — User I/O (bank 2) |
| Chân 54 | I/O — User I/O (bank 2) |
| Chân 55 | I/O — User I/O (bank 2) |
| Chân 56 | I/O — User I/O (bank 2) |
| Chân 57 | I/O — User I/O (bank 2) |
| Chân 58 | I/O — User I/O (bank 2) |
| Chân 59 | I/O — User I/O (bank 2) |
| Chân 60 | GND — Ground |
| Chân 61 | I/O — User I/O (bank 2) |
| Chân 62 | I/O — User I/O (bank 2) |
| Chân 63 | I/O — User I/O (bank 2) |
| Chân 64 | I/O — User I/O (bank 2) |
| Chân 65 | I/O — User I/O (bank 2) |
| Chân 66 | I/O — User I/O (bank 2) |
| Chân 67 | I/O — User I/O (bank 2) |
| Chân 68 | I/O — User I/O (bank 2) |
| Chân 69 | I/O — User I/O (bank 2) |
| Chân 70 | I/O — User I/O (bank 2) |
| Chân 71 | I/O — User I/O (bank 2) |
| Chân 72 | I/O — User I/O (bank 2) |
| Chân 73 | I/O — User I/O (bank 2) |
| Chân 74 | I/O — User I/O (bank 2) |
| Chân 75 | I/O — User I/O (bank 2) |
| Chân 76 | VCCIO2 — I/O bank 2 supply (2.5V or 3.3V) |
| Chân 77 | I/O — User I/O (bank 2) |
| Chân 78 | I/O — User I/O (bank 2) |
| Chân 79 | I/O — User I/O (bank 2) |
| Chân 80 | I/O — User I/O (bank 2) |
| Chân 81 | I/O — User I/O (bank 2) |
| Chân 82 | I/O — User I/O (bank 2) |
| Chân 83 | I/O — User I/O (bank 2) |
| Chân 84 | I/O — User I/O (bank 2) |
| Chân 85 | I/O — User I/O (bank 2) |
| Chân 86 | I/O — User I/O (bank 2) |
| Chân 87 | I/O — User I/O (bank 2) |
| Chân 88 | I/O — User I/O (bank 2) |
| Chân 89 | I/O — User I/O (bank 2) |
| Chân 90 | GND — Ground |
| Chân 91 | I/O — User I/O (bank 2) |
| Chân 92 | I/O — User I/O (bank 2) |
| Chân 93 | I/O — User I/O (bank 2) |
| Chân 94 | I/O — User I/O (bank 2) |
| Chân 95 | I/O — User I/O (bank 2) |
| Chân 96 | I/O — User I/O (bank 2) |
| Chân 97 | I/O — User I/O (bank 2) |
| Chân 98 | I/O — User I/O (bank 2) |
| Chân 99 | I/O — User I/O (bank 2) |
| Chân 100 | I/O — User I/O (bank 2) |
| Chân 101 | I/O — User I/O (bank 2) |
| Chân 102 | I/O — User I/O (bank 2) |
| Chân 103 | I/O — User I/O (bank 2) |
| Chân 104 | I/O — User I/O (bank 2) |
| Chân 105 | I/O — User I/O (bank 2) |
| Chân 106 | GND — Ground |
| Chân 107 | I/O — User I/O (bank 2) |
| Chân 108 | I/O — User I/O (bank 2) |
| Chân 109 | I/O — User I/O (bank 2) |
| Chân 110 | I/O — User I/O (bank 2) |
| Chân 111 | I/O — User I/O (bank 2) |
| Chân 112 | I/O — User I/O (bank 2) |
| Chân 113 | I/O — User I/O (bank 2) |
| Chân 114 | I/O — User I/O (bank 2) |
| Chân 115 | I/O — User I/O (bank 2) |
| Chân 116 | I/O — User I/O (bank 2) |
| Chân 117 | I/O — User I/O (bank 2) |
| Chân 118 | I/O — User I/O (bank 2) |
| Chân 119 | I/O — User I/O (bank 2) |
| Chân 120 | I/O — User I/O (bank 2) |
| Chân 121 | I/O — User I/O (bank 2) |
| Chân 122 | GND — Ground |
| Chân 123 | I/O — User I/O (bank 2) |
| Chân 124 | I/O — User I/O (bank 2) |
| Chân 125 | I/O — User I/O (bank 2) |
| Chân 126 | I/O — User I/O (bank 2) |
| Chân 127 | I/O — User I/O (bank 2) |
| Chân 128 | I/O — User I/O (bank 2) |
| Chân 129 | I/O — User I/O (bank 2) |
| Chân 130 | I/O — User I/O (bank 2) |
| Chân 131 | I/O — User I/O (bank 2) |
| Chân 132 | I/O — User I/O (bank 2) |
| Chân 133 | I/O — User I/O (bank 2) |
| Chân 134 | I/O — User I/O (bank 2) |
| Chân 135 | I/O — User I/O (bank 2) |
| Chân 136 | I/O — User I/O (bank 2) |
| Chân 137 | I/O — User I/O (bank 2) |
| Chân 138 | GND — Ground |
| Chân 139 | I/O — User I/O (bank 2) |
| Chân 140 | I/O — User I/O (bank 2) |
| Chân 141 | I/O — User I/O (bank 2) |
| Chân 142 | I/O — User I/O (bank 2) |
| Chân 143 | I/O — User I/O (bank 2) |
| Chân 144 | I/O — User I/O (bank 2) |
Ứng dụng tiêu biểu
EPM7256ATI144-10N phù hợp cho 6 Áp dụngs: PCI / ISA Bus Address Decoding, Industrial Control Glue Logic Replacement, DSP / Microcontroller I/O Expansion, Telecom Line Card Control Logic, Legacy Embedded System Modernization, Test and Measurement Front-End Logic.
PCI / ISA Bus Address Decoding
The EPM7256ATI144-10N is well-suited for legacy PCI and ISA bus address-decoding and glue-logic roles where deterministic, non-volatile instant-on behavior is critical. Its 256 macrocells easily hold multi-window address decoders, chip-select generators, and wait-state sequencers for 32-bit address spaces. The 10 ns pin-to-pin delay comfortably meets 33 MHz PCI timing budgets, while JTAG ISP allows field-upgradeable decode maps. Per the manufacturer datasheet, MultiVolt I/O supports 5V-tolerant interfacing via external clamping. Designers typically pair the part with pull-up resistors on unused JTAG pins and tie VCCIO to 3.3V for standard PCI signaling.
Được đề xuất
Industrial Control Glue Logic Replacement
The EPM7256ATI144-10N is widely used to replace multiple 74-series TTL packages in industrial controllers where board real estate and inventory complexity are concerns. Each macrocell can implement sum-of-products or registered logic, allowing one CPLD to replace dozens of discrete gates, latches, and counters. The industrial -40C to +85C operating range supports factory-floor deployment, and EEPROM non-volatile configuration means no boot PROM is needed after power cycling. The 68 user I/Os at 144-pin TQFP easily absorb motor-control enable logic, sensor-conditioning gating, and safety-interlock chains typical of PLC designs.
Được đề xuất
DSP / Microcontroller I/O Expansion
The EPM7256ATI144-10N expands the I/O count of DSPs and microcontrollers that lack sufficient peripheral pins, offloading tasks like PWM generation, quadrature decoding, LED multiplexing, and keypad scanning. The CPLD's deterministic 10 ns delay is fast enough for parallel-bus interfaces to 100 MHz-class microcontrollers, while the 256 macrocells hold multiple state machines in a single chip. The JTAG ISP interface allows in-circuit reprogramming for late-stage firmware changes. The MultiVolt I/O bank supports 2.5V and 3.3V cores, with external level shifters required for 5V MCU interfaces.
Được đề xuất
Telecom Line Card Control Logic
The EPM7256ATI144-10N serves telecom line cards as a non-volatile control-plane CPLD handling clock muxing, framers, line-interface unit (LIU) control, hot-swap sequencing, and alarm generation. Its 3.3V core with MultiVolt I/O eases interface to legacy 5V LIUs and modern 3.3V framers. The 16 LAB architecture supports multiple independent state machines running in parallel for alarm aggregation and watchdog supervision. Industrial temperature rating supports outside-plant cabinets. Designers commonly use the JTAG boundary-scan feature for board-level test, taking advantage of the built-in IEEE 1149.1 interface.
Được đề xuất
Legacy Embedded System Modernization
Designers maintain and modernize legacy embedded products by inserting the EPM7256ATI144-10N to add new features without redesigning the host microcontroller. The CPLD acts as a feature-add bridge: it presents a known register map to the host CPU and arbitrates new peripherals such as USB controllers, LCD panels, or wireless modules. With 256 macrocells, the part can implement full interrupt controllers, address mappers, and protocol converters like UART-to-SPI bridges. The EEPROM-backed configuration means no firmware boot sequence is needed, simplifying system bring-up.
Được đề xuất
Test and Measurement Front-End Logic
The EPM7256ATI144-10N provides reconfigurable front-end logic in test and measurement instruments where multiple measurement paths must be switched, multiplexed, or sequenced under software control. The 10 ns delay comfortably handles 50 MHz instrumentation buses, while the 256 macrocells fit complex trigger and gating networks. Industrial temperature rating ensures stable operation in lab and field environments. The JTAG ISP interface enables rapid iteration of measurement logic without removing the part from the board, accelerating instrument development cycles.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EPM7256ATI144-10N — 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 | EPM7256AETI144-10N | EPM7256AETI144-7N | EPM7256AETC144-10N | EPM7256AETC144-7N |
|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera |
| Package | TQFP-144 | TQFP-144 (same) | TQFP-144 (same) | TQFP-144 (same) | TQFP-144 (same) |
| Macrocells | 256 | 256 | 256 | 256 | 256 |
| Pin-to-Pin Delay | 10 ns | 10 ns | 7 ns | 10 ns | 7 ns |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Commercial (0C to +70C) |
| Supply Voltage VCCINT | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| MultiVolt I/O Support | 2.5V / 3.3V | 2.5V / 3.3V | 2.5V / 3.3V | 2.5V / 3.3V | 2.5V / 3.3V |
| Programming Method | JTAG IEEE 1149.1 (ISP) | JTAG IEEE 1149.1 (ISP) | JTAG IEEE 1149.1 (ISP) | JTAG IEEE 1149.1 (ISP) | JTAG IEEE 1149.1 (ISP) |
Bảo phân biệt quan trọng
- Last-time-buy availability in a mature 256-macrocell density (vsEPM7256AETI144-10N)
- Direct upgrade path to -7N speed grade for higher-speed designs (vsEPM7256AETI144-7N)
- Industrial temperature grade for harsh environments (vsEPM7256AETC144-10N)
Ghi chú thiết kế
The EPM7256ATI144-10N requires VCCINT tied to 3.3V and VCCIO tied to the I/O bank voltage (2.5V or 3.3V). Decouple each VCCINT and VCCIO pin with a 0.1uF X7R ceramic capacitor placed within 5 mm of the pin, plus a bulk 10uF tantalum or ceramic at the supply entry point. Per the datasheet, all VCCINT pins must be connected even if internal logic is unused, and unused I/O pins should be left floating or driven to a defined logic level to minimize quiescent current.
Place the TQFP-144 device on the top side of the board with a continuous ground plane on the layer directly beneath to provide a low-impedance return path for switching I/Os. Keep JTAG traces (TDI, TDO, TMS, TCK) under 75 mm and isolated from high-speed signal traces to avoid ISP programming failures. Add 4.7k pull-up resistors on TMS and TDI to keep the JTAG state machine in a benign state during normal operation, and a 10k pull-up on TCK if not driven continuously.
Common pitfalls with the EPM7256A include leaving VCCIO floating (MultiVolt I/O will be indeterminate), mixing 5V signals on I/O banks without external clamping (the device is 3.3V-tolerant with 4.0V absolute maximum per I/O), and failing to instantiate the JTAG pins in the Quartus pin assignment. Also, ensure the device is unlocked before ISP programming by holding nSTATUS high and nCONFIG high, otherwise the bootloader will treat the configuration as incomplete.
Route high-speed output clocks on inner layers with controlled impedance to minimize EMI. Use guard traces or increased spacing between analog-sensitive input pins and high-toggle-count output pins. For 33 MHz PCI designs, place the CPLD within 50 mm of the PCI connector and route the PCI clock trace length-matched to other PCI signals within +/-2 mm. Add series termination resistors (22-33 ohm) on high-fanout outputs to reduce ground bounce.
Thông tin tuân thủ
RoHS, REACH, halogen-free, and conflict-minerals status not explicitly provided in the verified web data; marked unknown. Lead-free assumed based on the N suffix indicating lead-free finish per Altera ordering code guide.