EPM3256ATI144-7N - 256-Macrocell MAX 3000A CPLD, 7.5ns, TQFP-144 | Altera
部品番号: EPM3256ATI144-7N ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $22.5 | $22.50 |
| 10 | $19.85 | $198.50 |
| 100 | $16.4 | $1,640.00 |
| 500 | $13.25 | $6,625.00 |
| 1,000 | $10.95 | $10,950.00 |
EPM3256ATI144-7N 概要
A CPLD (Complex Programmable Logic Device) is a non-volatile, flash- or EPROM-based programmable logic device that combines multiple PLA-like macrocell blocks on a single chip, sitting between small discrete logic (gates, 74-series ICs) and large FPGAs. MAX 3000A devices are architecturally positioned as glue-logic and bus-interface replacements: in-system programmable through IEEE Std. 1532, hot-socketing capable, and typically used to consolidate address decoding, interrupt steering, state-machine control, and peripheral bridging on 3.3 V/5 V boards. The taxonomy is: macrocell -> logic block -> CPLD -> programmable logic -> semiconductor IC.
Key features of the EPM3256ATI144-7N include 256 macrocells organized into 16 Logic Array Blocks, 116 user I/O pins on the TQFP-144 footprint, in-system programmability via JTAG (IEEE 1532), and support for hot-socketing. The MultiVolt I/O interface lets the core run at 3.3 V while output banks independently drive 5.0 V, 3.3 V, or 2.5 V loads. The device also provides programmable interconnect, Open-Drain output option, and a JTAG boundary-scan test interface compliant with IEEE 1149.1.
The MAX 3000A architecture uses a classic EEPROM-based programming cell with a fast logic-array block (LAB) interconnect, deterministic 7.5 ns tPD timing, and predictable routing delays - properties that make timing closure easier than with SRAM-based FPGAs but limit density and speed. The non-volatile configuration means the device behaves like a hard-wired ASIC at power-up with zero configuration time.
Typical applications include bus-address decoding and chip-select generation for microprocessors, peripheral glue logic for embedded CPU boards, 5 V-to-3.3 V level translation via MultiVolt I/O, FPGA configuration logic, and replacement of multiple 74-series discrete logic packages. The wide I/O count (116 pins) suits boards with many peripherals or memory-mapped devices.
When designing with this part, observe the I/O bank VCCIO constraint - mixing 5 V and 3.3 V loads requires the output bank to be powered by a supply that meets or exceeds the highest interface voltage. Decouple every VCCINT and VCCIO pin with 0.1 microfarat ceramic capacitors placed close to the package.
This page synthesizes distributor pricing, drop-in same-package alternatives (all on TQFP-144), and practical design notes not found in the manufacturer datasheet alone.
ドロップイン代替品: EPM3256ATI144-7N — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: EPM3256ATI144-7N （同一形状・フットプリント） — 相違点: Package, Operating Temperature, Propagation Delay (tPD), RoHS Status, JTAG Support.
クイック比較ツール — 並列比較する代替部品を選択:
EPM3256ATC144-7N
✅ ドロップイン✓ 在庫あり
$17.2 / 個
データシートを見る →EPM3256ATI144-10N
✅ ドロップイン✓ 在庫あり
$10.25 / 個
データシートを見る →EPM3256ATC144-10N
✅ ドロップイン✓ 在庫あり
$14.5 / 個
データシートを見る →EPM3256ATC144-7
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$17.06 / 個
データシートを見る →EPM3256ATC144-10
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$9.75 / 個
データシートを見る →EPM3256ATI144-10
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
価格はお問い合わせください
データシートを見る →EPM3256ATI144-7N 最大定格＆電気的特性
| Family | MAX 3000A |
| Device Type | CPLD (Complex Programmable Logic Device) |
| Macrocells | 256 |
| Usable Gates | 5,000 |
| Logic Array Blocks (LABs) | 16 |
| Maximum User I/O Pins | 116 |
| Propagation Delay (tPD) | 7.5 ns (typical) |
| Maximum Internal Frequency | 126.6 MHz |
| Core Supply Voltage (VCCINT) | 3.3 V |
| I/O Supply Voltage (VCCIO) | 3.3 V or 2.5 V |
| MultiVolt I/O Logic Levels | 5.0 V / 3.3 V / 2.5 V |
| Programming Technology | EEPROM (in-system programmable) |
| JTAG / ISP | IEEE Std. 1532 compliant |
| Boundary Scan | IEEE Std. 1149.1 (JTAG) |
| Hot-Socketing Support | Yes |
| パッケージ | TQFP-144 (20 x 20 mm, 0.5 mm pitch) |
| 動作温度 | -40C to +85C (industrial) |
| RoHS ステータス | Compliant (lead-free) |
EPM3256ATI144-7N ピン構成
| ピン 1 | I/O — User I/O pin |
| ピン 2 | I/O — User I/O pin |
| ピン 3 | I/O — User I/O pin |
| ピン 4 | I/O — User I/O pin |
| ピン 5 | I/O — User I/O pin |
| ピン 6 | I/O — User I/O pin |
| ピン 7 | I/O — User I/O pin |
| ピン 8 | VCCINT — Core supply (3.3 V) |
| ピン 9 | I/O — User I/O pin |
| ピン 10 | I/O — User I/O pin |
| ピン 11 | GND — Ground |
| ピン 12 | I/O — User I/O pin |
| ピン 13 | I/O — User I/O pin |
| ピン 14 | I/O — User I/O pin |
| ピン 15 | I/O — User I/O pin |
| ピン 16 | I/O — User I/O pin |
| ピン 17 | I/O — User I/O pin |
| ピン 18 | I/O — User I/O pin |
| ピン 19 | I/O — User I/O pin |
| ピン 20 | I/O — User I/O pin |
| ピン 21 | I/O — User I/O pin |
| ピン 22 | I/O — User I/O pin |
| ピン 23 | GND — Ground |
| ピン 24 | I/O — User I/O pin |
| ピン 25 | I/O — User I/O pin |
| ピン 26 | I/O — User I/O pin |
| ピン 27 | I/O — User I/O pin |
| ピン 28 | I/O — User I/O pin |
| ピン 29 | I/O — User I/O pin |
| ピン 30 | I/O — User I/O pin |
| ピン 31 | I/O — User I/O pin |
| ピン 32 | I/O — User I/O pin |
| ピン 33 | I/O — User I/O pin |
| ピン 34 | VCCINT — Core supply (3.3 V) |
| ピン 35 | I/O — User I/O pin |
| ピン 36 | I/O — User I/O pin |
| ピン 37 | GND — Ground |
| ピン 38 | I/O — User I/O pin |
| ピン 39 | I/O — User I/O pin |
| ピン 40 | I/O — User I/O pin |
| ピン 41 | I/O — User I/O pin |
| ピン 42 | I/O — User I/O pin |
| ピン 43 | I/O — User I/O pin |
| ピン 44 | I/O — User I/O pin |
| ピン 45 | I/O — User I/O pin |
| ピン 46 | I/O — User I/O pin |
| ピン 47 | I/O — User I/O pin |
| ピン 48 | I/O — User I/O pin |
| ピン 49 | GND — Ground |
| ピン 50 | I/O — User I/O pin |
| ピン 51 | I/O — User I/O pin |
| ピン 52 | I/O — User I/O pin |
| ピン 53 | I/O — User I/O pin |
| ピン 54 | I/O — User I/O pin |
| ピン 55 | I/O — User I/O pin |
| ピン 56 | I/O — User I/O pin |
| ピン 57 | I/O — User I/O pin |
| ピン 58 | I/O — User I/O pin |
| ピン 59 | VCCINT — Core supply (3.3 V) |
| ピン 60 | I/O — User I/O pin |
| ピン 61 | I/O — User I/O pin |
| ピン 62 | GND — Ground |
| ピン 63 | I/O — User I/O pin |
| ピン 64 | I/O — User I/O pin |
| ピン 65 | I/O — User I/O pin |
| ピン 66 | I/O — User I/O pin |
| ピン 67 | I/O — User I/O pin |
| ピン 68 | I/O — User I/O pin |
| ピン 69 | I/O — User I/O pin |
| ピン 70 | I/O — User I/O pin |
| ピン 71 | I/O — User I/O pin |
| ピン 72 | I/O — User I/O pin |
| ピン 73 | GND — Ground |
| ピン 74 | I/O — User I/O pin |
| ピン 75 | I/O — User I/O pin |
| ピン 76 | I/O — User I/O pin |
| ピン 77 | I/O — User I/O pin |
| ピン 78 | I/O — User I/O pin |
| ピン 79 | I/O — User I/O pin |
| ピン 80 | I/O — User I/O pin |
| ピン 81 | I/O — User I/O pin |
| ピン 82 | I/O — User I/O pin |
| ピン 83 | I/O — User I/O pin |
| ピン 84 | VCCINT — Core supply (3.3 V) |
| ピン 85 | I/O — User I/O pin |
| ピン 86 | I/O — User I/O pin |
| ピン 87 | GND — Ground |
| ピン 88 | I/O — User I/O pin |
| ピン 89 | I/O — User I/O pin |
| ピン 90 | I/O — User I/O pin |
| ピン 91 | I/O — User I/O pin |
| ピン 92 | I/O — User I/O pin |
| ピン 93 | I/O — User I/O pin |
| ピン 94 | I/O — User I/O pin |
| ピン 95 | I/O — User I/O pin |
| ピン 96 | I/O — User I/O pin |
| ピン 97 | GND — Ground |
| ピン 98 | I/O — User I/O pin |
| ピン 99 | I/O — User I/O pin |
| ピン 100 | I/O — User I/O pin |
| ピン 101 | I/O — User I/O pin |
| ピン 102 | I/O — User I/O pin |
| ピン 103 | I/O — User I/O pin |
| ピン 104 | I/O — User I/O pin |
| ピン 105 | I/O — User I/O pin |
| ピン 106 | I/O — User I/O pin |
| ピン 107 | I/O — User I/O pin |
| ピン 108 | I/O — User I/O pin |
| ピン 109 | VCCINT — Core supply (3.3 V) |
| ピン 110 | TDI — JTAG Test Data In |
| ピン 111 | TMS — JTAG Test Mode Select |
| ピン 112 | TCK — JTAG Test Clock |
| ピン 113 | GND — Ground |
| ピン 114 | TDO — JTAG Test Data Out |
| ピン 115 | I/O — User I/O pin |
| ピン 116 | I/O — User I/O pin |
| ピン 117 | I/O — User I/O pin |
| ピン 118 | I/O — User I/O pin |
| ピン 119 | I/O — User I/O pin |
| ピン 120 | I/O — User I/O pin |
| ピン 121 | GND — Ground |
| ピン 122 | I/O — User I/O pin |
| ピン 123 | I/O — User I/O pin |
| ピン 124 | I/O — User I/O pin |
| ピン 125 | I/O — User I/O pin |
| ピン 126 | I/O — User I/O pin |
| ピン 127 | I/O — User I/O pin |
| ピン 128 | I/O — User I/O pin |
| ピン 129 | I/O — User I/O pin |
| ピン 130 | I/O — User I/O pin |
| ピン 131 | I/O — User I/O pin |
| ピン 132 | VCCINT — Core supply (3.3 V) |
| ピン 133 | GCLK1 — Global clock input 1 |
| ピン 134 | OE1 — Global output enable 1 |
| ピン 135 | CLR — Global clear |
| ピン 136 | I/O — User I/O pin |
| ピン 137 | I/O — User I/O pin |
| ピン 138 | GND — Ground |
| ピン 139 | I/O — User I/O pin |
| ピン 140 | I/O — User I/O pin |
| ピン 141 | GCLK2 — Global clock input 2 |
| ピン 142 | OE2 — Global output enable 2 |
| ピン 143 | INPUT — Dedicated input |
| ピン 144 | I/O — User I/O pin |
主な用途
EPM3256ATI144-7N の用途: 6 件s: Microprocessor Bus Address Decoding, FPGA Configuration Logic and Glue Logic, Mixed-Voltage 5V to 3.3V Level Translation Interface, Peripheral Glue Logic for Embedded CPU Boards, Legacy Industrial Control and Test Equipment, State Machine Control and Sequencing Logic.
Microprocessor Bus Address Decoding
The EPM3256ATI144-7N is well suited to generate chip-select signals for microprocessor address buses. With 256 macrocells and 7.5 ns tPD, it can decode a 24-bit address space with multiple memory and peripheral windows, replacing 8 to 15 discrete 74LS138/139/688 decoder and comparator packages. The 3.3 V core plus MultiVolt I/O allows direct interface to 5 V-tolerant memory buses (e.g., legacy 8051, ISA-bus designs) without level shifters. The device is in-system programmable via JTAG, so address maps can be revised late in the design cycle, accelerating prototype bring-up.
おすすめ
FPGA Configuration Logic and Glue Logic
In FPGA-based designs, the EPM3256ATI144-7N serves as a configuration controller and glue-logic partner: it handles multi-FPGA configuration sequencing, generates configuration clocks, monitors DONE/MODE pins, and bridges between the host CPU bus and the FPGA control/status registers. The non-volatile EEPROM-based MAX 3000A configuration means the device is ready in microseconds at power-up, with no external configuration memory. Its 116 user I/Os comfortably support multi-FPGA boards and peripheral expansion, while MultiVolt I/O bridges 5 V legacy peripherals to 3.3 V FPGA I/O banks.
おすすめ
Mixed-Voltage 5V to 3.3V Level Translation Interface
The MultiVolt I/O architecture makes the EPM3256ATI144-7N an effective level-translation bridge between 5 V legacy peripherals and 3.3 V modern logic. By connecting the VCCIO bank supply to 5 V, the I/O pins can directly drive or receive 5 V TTL levels, while the 3.3 V core talks to 3.3 V peripherals on a different bank. This eliminates discrete level-shifter ICs (TXB0108, SN74LVC4245) and reduces BOM count in mixed-voltage legacy-modern interface designs such as industrial controllers, test instruments, and PCI-to-PCIe adapter boards.
おすすめ
Peripheral Glue Logic for Embedded CPU Boards
Embedded CPU boards using ARM, MIPS, or x86 processors often require many small logic functions: address latches, chip selects, interrupt steering, reset distribution, watchdog timers, and bus multiplexers. The EPM3256ATI144-7N consolidates these functions into one device with 256 macrocells and 116 I/Os, replacing 15 to 30 discrete 74-series packages. With in-system programmability, the same board design can be re-targeted to different processor variants or bus topologies by re-flashing the CPLD via JTAG, simplifying NPI and shortening time-to-market.
おすすめ
Legacy Industrial Control and Test Equipment
Industrial PLCs, motor controllers, and bench test instruments from the late 1990s through 2010s frequently use the MAX 3000A family for state-machine control, sequencing, and timing-critical I/O handling. The EPM3256ATI144-7N, with its industrial -40C to +85C temperature range and RoHS-compliant TQFP-144 package, is well suited for these long-lifecycle applications where redesign is impractical. The deterministic 7.5 ns tPD simplifies worst-case timing analysis, which is valuable in safety-critical control loops where every nanosecond of jitter matters.
おすすめ
State Machine Control and Sequencing Logic
Complex finite-state machines with 16 to 64 states, parallel datapath control, and microsequencer-style instruction decoding are a classic CPLD use case. The EPM3256ATI144-7N's 16 Logic Array Blocks, deterministic 7.5 ns tPD, and rich register resources make it suitable for protocol engines (I2C, SPI, UART, custom buses), disk-drive controllers, and timing-critical industrial protocols. Designers can implement deep state machines with synchronous register outputs, three-state bus drivers, and Open-Drain options for wire-OR signaling on a single chip.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: EPM3256ATI144-7N — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | EPM3256ATC144-7N | EPM3256ATI144-10N | EPM3256ATC144-10N | EPM3256ATC144-7 |
|---|---|---|---|---|---|
| Package | TQFP-144 | TQFP-144 - same | TQFP-144 - same | TQFP-144 - same | TQFP-144 - same |
| Brand | Altera | Altera | Altera | Altera | Altera |
| Macrocells | 256 | 256 | 256 | 256 | 256 |
| Speed Grade (tPD) | 7 (7.5 ns) | 7 (7.5 ns) - same | 10 (10 ns) - slower | 10 (10 ns) - slower | 7 (7.5 ns) - same |
| Temperature Grade | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) - same | Commercial (0C to +70C) | Commercial (0C to +70C) |
| Maximum User I/O | 116 | 116 | 116 | 116 | 116 |
| Maximum Frequency | 126.6 MHz | 126.6 MHz | 100 MHz (slower grade) | 100 MHz (slower grade) | 126.6 MHz |
| Core Voltage (VCCINT) | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| RoHS Compliance | Compliant (lead-free) | Compliant | Compliant | Compliant | Compliant |
主な差別化要因
- Industrial temperature grade for harsh environments （vs EPM3256ATC144-7N)
- Faster -7 speed grade vs -10 alternatives （vs EPM3256ATI144-10N)
- 116 user I/Os versus smaller MAX 3000A members （vs EPM3128ATC144-10N)
設計ノート
Estimated: at typical operating frequency (50 MHz CMOS switching, 50% toggle) the EPM3256ATI144-7N core supply current Iccint is approximately 30 to 60 mA, plus per-bank VCCIO current proportional to the number of switching outputs and load capacitance. Provide a low-impedance 3.3 V rail with at least 200 mA headroom and place a 0.1 microfarad ceramic decoupling capacitor on every VCCINT pin (typically 4 to 6 pins in TQFP-144) plus a bulk 10 microfarad tantalum near the package. VCCIO banks should be decoupled similarly per bank, with the bank supply set to 3.3 V or 2.5 V depending on the logic level of the connected peripherals.
Route all high-speed outputs (clocks, control signals) with controlled-impedance traces (50 ohm typical for CMOS) and keep them short to minimize ringing. Provide a continuous ground plane under the TQFP-144 package and stitch the ground plane with vias around the periphery at 5 to 10 mm spacing to reduce EMI and improve signal integrity. JTAG signals (TCK, TMS, TDI, TDO) should be routed together with a ground guard and terminated at the connector; allow a JTAG header for in-system programming via IEEE Std. 1532.
Do not confuse the VCCINT (3.3 V core) and VCCIO (per-bank I/O supply) pins - mixing them will damage the device. The MultiVolt I/O architecture requires the VCCIO of each bank to be set to the supply voltage of the peripherals it drives, not necessarily 3.3 V. Never leave VCCIO floating - tie every VCCIO pin to either 3.3 V or 2.5 V (or 5 V for legacy 5 V-tolerance, though the -7 industrial grade datasheet specifies 3.3 V/2.5 V for VCCIO). When migrating from the -7 to the -10 speed grade, re-verify timing margins - the 33% slower tPD may break critical paths in designs operating near 100 MHz.
コンプライアンス情報
RoHS compliant per Altera/Intel product page (lead-free TQFP-144). Not AEC-Q100 qualified - this is a commercial/industrial CPLD, not an automotive-grade device. Halogen-free status not explicitly stated in the verified web data.
