EPM7256AETI100-7N - 256-MacroCell MAX 7000A CPLD, 100TQFP | Intel
MPN: EPM7256AETI100-7N ⚠ Bahagian terakhir untuk beliEPM7256AETI100-7N Ringkasan
A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic IC that sits between simple PAL/GAL arrays and larger FPGAs. Architecturally, a CPLD partitions logic into multiple macrocell-PLA blocks connected by a central interconnect matrix, giving predictable, deterministic timing well suited to control-plane logic, address decoding, and state-machine implementation. In the system hierarchy it belongs to the programmable-logic family, alongside SPLDs, FPGAs, and PALs, and is commonly classified as a power-management and glue-logic companion to microcontrollers, microprocessors, and bus interfaces.
Key features of the EPM7256AETI100-7N include 256 macrocells, 5 K usable gates, 84 user I/O, in-system programmability via JTAG, and IEEE Std 1149.1 boundary-scan test support. The MAX 7000A architecture provides pin-locking for incremental design changes and individual output enable control per macrocell, allowing wide design reuse across board revisions. The 100-pin TQFP (1.0 mm pitch, 14 mm x 14 mm body) package is a JEDEC-standard surface-mount outline well suited to industrial assembly.
Typical applications include address decoding and bus-interface bridging, state-machine controllers, peripheral glue logic in embedded systems, and reconfigurable I/O expansion for microcontrollers and DSPs. Designers also use MAX 7000A CPLDs to replace discrete 74-series logic, reducing board area and BOM cost. When using this device, ensure that the JTAG chain is properly terminated and that input signals respect the 3.3 V VCCIO supply; a 0.1 uF decoupling capacitor should be placed adjacent to each supply pin.
This page synthesizes distributor pricing, drop-in alternatives within the MAX 7000A family, and practical design notes not found in the manufacturer datasheet alone.
Pilihan pengganti yang segera untuk EPM7256AETI100-7N — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
Varietas dalam siri ini
Model serupa yang kompatibel dengan pengganti yang segera EPM7256AETI100-7N (sama faktor bentuk dan kaki) — berbeza dalam Package, Operating Temperature, RoHS Status, Process Technology, Programmability.
EPM7256AETI100-7
✅ Masuk Drop-In📋 Alternatif rujukan (tidak dalam katalog)
EPM7256AETC100-10N
✅ Masuk Drop-InHubungi untuk harga
Lihat Datasheet →EPM7256AEFI100-7
✅ Masuk Drop-InHubungi untuk harga
Lihat Datasheet →EPM7256AETI100-10N
✅ Masuk Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif rujukan (tidak dalam katalog)
EPM7256AEFC100-7
✅ Masuk Drop-In ⚠️ Spesifikasi Tidak DisahkanHubungi untuk harga
Lihat Datasheet →EPM7128AETI100-7N
✅ Masuk Drop-InHubungi untuk harga
Lihat Datasheet →EPM7256AETI100-7N Penilaian maksimum & Ciri-ciri Elektrik
| Family | MAX 7000A |
| Device Type | CPLD - Complex Programmable Logic Device |
| Macrocells | 256 |
| Usable Gates | 5,000 |
| Maximum User I/O | 84 |
| Logic Elements / Blocks | 16 Logic Array Blocks |
| Maximum Operating Frequency | 126.6 MHz |
| Propagation Delay (tPD) | 7.5 ns |
| Core Supply Voltage (VCCINT) | 3.3 V |
| I/O Supply Voltage (VCCIO) | 3.3 V |
| Technology | CMOS, EEPROM-based configuration |
| Programmability | In-system programmable via JTAG (IEEE 1149.1) |
| Kemasan | 100-pin TQFP (TQ100, 14x14 mm, 0.5 mm pitch) |
| Jenis Pemasangan | Surface Mount |
| Suhu Operasi | -40C to +85C (Industrial) |
| Aras MSL | 3 (168 hours) |
| Status RoHS | Compliant |
Panduan Konfigurasi Pin EPM7256AETI100-7N 100-pin tqfp (tq100, 14x14 mm, 0.5 mm pitch)
Konfigurasi pin untuk EPM7256AETI100-7N (100-pin tqfp (tq100, 14x14 mm, 0.5 mm pitch) pakai). IC digital ini termasuk GPIO, antaramuka komunikasi (UART, SPI, I2C), dan pin kuasa. Rujuk dokumen pengeluar untuk fungsi pin alternatif dan opsi konfigurasi. Biasa digunakan dalam rancangan sistem ter嵌入式 dan PCB.
Tiada data garisan pin yang diperoleh untuk EPM7256AETI100-7N.
Rujuk kepada lembaran data untuk konfigurasi pin penuh.
Aplikasi Biasa
EPM7256AETI100-7N patut untuk 6 aplikasis: Address Decoding and Bus Interfacing, State-Machine and Control Logic, Peripheral Glue Logic Replacement, I/O Expansion and Voltage Translation, DSP and Microcontroller Co-Processor, Legacy Industrial System Modernization.
Address Decoding and Bus Interfacing
The EPM7256AETI100-7N excels at address decoding and bus-interface bridging between microprocessors, microcontrollers, and peripherals. With 256 macrocells and 84 user I/O, it can decode wide address buses (24-bit or larger) into dozens of chip-select lines in a single device, replacing banks of 74-series glue logic. The MAX 7000A deterministic timing of 7.5 ns tPD guarantees that chip-select assertions stay within one clock cycle, critical for memory and peripheral access without wait states. In-system programmability via JTAG (IEEE 1149.1) lets designers modify the decoding map after PCB layout, while pin-locking preserves the existing footprint. Compared to discrete 74HC138/139 decoders, this CPLD reduces board area by 70% and improves EMI by eliminating long parallel trace runs.
Disebarkan
State-Machine and Control Logic
The EPM7256AETI100-7N is widely used to implement finite-state machines, sequencers, and protocol controllers in embedded systems. The MAX 7000A macrocell architecture provides a programmable AND/OR array with a flip-flop per macrocell, ideal for state-machine encoding schemes including one-hot, binary, and Gray. With 126.6 MHz fCNT, the device runs state machines at speeds sufficient to handle UART, SPI, I2C, and custom bit-banged protocols in real time. The 5,000 usable gates handle complex multi-state designs such as motor-control sequencers, industrial protocol bridges, and test-pattern generators. Industrial -40C to +85C temperature rating supports factory-floor deployments, while deterministic timing simplifies Worst-Case Timing Analysis (WCTA) for safety-critical applications.
Disebarkan
Peripheral Glue Logic Replacement
Designers replace discrete 74HC/74AHC glue-logic gates with the EPM7256AETI100-7N to consolidate dozens of small-scale integration (SSI) packages into a single programmable device. 256 macrocells equate to roughly 30 to 40 standard SSI packages worth of logic, dramatically reducing PCB area, BOM count, and assembly cost. The 100-pin TQFP footprint provides 84 user I/O that can be reconfigured at any time via JTAG, enabling late-stage design changes without board respins. Compared to a discrete-logic implementation, this CPLD also improves signal integrity by eliminating long SSI-to-SSI trace runs and centralizing timing within a single deterministic device. Industrial temp and 3.3 V operation match modern low-power system requirements.
Disebarkan
I/O Expansion and Voltage Translation
The EPM7256AETI100-7N serves as a flexible I/O expander and 5 V to 3.3 V level translator between legacy and modern logic families. Its 3.3 V I/O accept 5 V TTL-level inputs (per MAX 7000A datasheet), so the same device can bridge a 5 V microcontroller bus to a 3.3 V peripheral such as an SDRAM, DSP, or modern SoC. With 84 user I/O, one CPLD can replace multiple bus-switch or level-translator ICs, simplifying the BOM and freeing board area. In-system programmability enables last-minute I/O mapping changes during board bring-up. Industrial temperature rating supports outdoor and factory deployments where mixed-voltage signaling is common.
Disebarkan
DSP and Microcontroller Co-Processor
The EPM7256AETI100-7N acts as a hardware co-processor for DSPs and microcontrollers, offloading real-time tasks such as DMA sequencing, FIFO control, custom timer chains, and interrupt aggregation. The 126.6 MHz internal counter rate and 7.5 ns tPD propagation delay handle timing-critical peripherals without burdening the main processor. Designers implement glue logic between a TI C6000 DSP, NXP PowerPC, or ARM Cortex-M microcontroller and external memory or ADC/DAC devices, freeing CPU cycles for algorithmic work. The deterministic timing model of MAX 7000A simplifies Worst-Case Timing Analysis (WCTA) compared with LUT-based FPGAs, important for safety-critical or hard-real-time applications.
Disebarkan
Legacy Industrial System Modernization
The EPM7256AETI100-7N is commonly used to modernize legacy industrial systems by replacing obsolete or end-of-life discrete logic and PAL/GAL devices. Industrial machines, PLCs, and test equipment built in the 1990s and 2000s often rely on MAX 7000A CPLDs for control logic; new identical parts keep these systems running without costly redesign or re-certification. The in-system programmability via JTAG enables field firmware updates via boundary-scan, useful for upgrades during scheduled maintenance windows. The -40C to +85C industrial temperature rating and 3.3 V operation suit factory-floor environments with wide thermal variation. For long-life industrial platforms, the part's established reliability track record and pin-compatible MAX II Z migration path are key selection criteria.
Disebarkan
Ringkasan Produk Disebarkan
Data referensi kejuruteraan untuk EPM7256AETI100-7N — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini | EPM7256AETI100-7 | EPM7256AETC100-10N | EPM7256AEFI100-7 | EPM7128AETI100-7N |
|---|---|---|---|---|---|
| Package | TQFP-100 (14x14 mm, 0.5 mm pitch) | TQFP-100 - same | TQFP-100 - same | TQFP-100 - same | TQFP-100 - same |
| Brand | Intel (formerly Altera) | Intel - same | Intel - same | Intel - same | Intel - same |
| Macrocells | 256 | 256 - same | 256 - same | 256 - same | 128 (-50%) |
| Usable Gates | 5,000 | 5,000 - same | 5,000 - same | 5,000 - same | 2,500 (-50%) |
| User I/O | 84 | 84 - same | 84 - same | 84 - same | 84 - same |
| tPD (Propagation Delay) | 7.5 ns | 7.5 ns - same | 10 ns (slower) | 7.5 ns - same | 7.5 ns - same |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C - same | 0C to +70C (Commercial) | -40C to +85C - same | -40C to +85C - same |
| RoHS Compliance | Yes (lead-free, -N suffix) | No (tin-lead finish) | Yes (lead-free) | Varies | Yes (lead-free) |
| Core Voltage | 3.3 V | 3.3 V - same | 3.3 V - same | 3.3 V - same | 3.3 V - same |
| Lifecycle Status | Last-Time-Buy | Last-Time-Buy | Last-Time-Buy | Last-Time-Buy | Last-Time-Buy |
Penyeberangsung Jelas
- 256 macrocells with 84 user I/O in compact 100-pin TQFP (vsEPM7128AETI100-7N)
- Industrial temperature rating with lead-free RoHS finish (vsEPM7256AETC100-10N)
- Faster 7.5 ns tPD versus 10 ns grade in same package (vsEPM7256AETI100-10N)
- Drop-in compatibility with non-N finish for legacy designs (vsEPM7256AETI100-7)
Catatan Desain
The EPM7256AETI100-7N requires a clean 3.3 V supply on VCCINT and VCCIO. Place a 0.1 uF decoupling capacitor adjacent to every supply pin, with a bulk 10 uF tantalum or ceramic at the board entry. According to the MAX 7000A datasheet, inrush current during configuration can reach several hundred mA; ensure the regulator has adequate headroom and that the supply ramp is monotonic to avoid partial-configuration latch-up.
Route JTAG signals (TDI, TDO, TMS, TCK) with controlled impedance and keep them short. Per IEEE 1149.1, place a 10 kohm pull-up on TCK and TMS to prevent spurious clocking during board reset. The TRST pin should be tied to VCCIO through a 1 kohm resistor per the MAX 7000A datasheet, or pulled low if not used. Keep JTAG traces away from high-frequency switching signals to avoid programming failures.
The 100-pin TQFP has 0.5 mm pitch, requiring fine-pitch PCB layout with 4 mil traces and 4 mil spaces typical. Use a 4-layer PCB with continuous ground plane beneath the device to control impedance and provide thermal dissipation. Estimated: at 100 percent resource utilization the device may dissipate 0.5 W to 1 W; an exposed copper pour of at least 1 square inch on top and bottom layers is recommended for thermal relief.
Do not apply 5 V to I/O pins when VCCIO is 3.3 V; the absolute-maximum VCCIO + 0.5 V or 4.0 V limit applies. Per the MAX 7000A datasheet, inputs above this limit will forward-bias ESD clamp diodes and may damage the device. For mixed-voltage designs, use external bus switches or level translators. Also avoid leaving user I/O floating; unused pins should be configured as outputs driving low to minimize supply current.
Maklumat Kesediaan
RoHS compliant per Intel/Altera product page (lead-free, -N suffix). Not AEC-Q100 qualified - the MAX 7000A family does not offer an automotive-temp variant. Conflict-minerals compliant per Intel CMRT filings.
