EPM7256AETC144-7N - MAX 7000A CPLD, 256 Macrocells, 7.5ns | Intel
料号： EPM7256AETC144-7N ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $50.62 | $50.62 |
| 10 | $45.5 | $455.00 |
| 100 | $38.9 | $3,890.00 |
| 250 | $33.2 | $8,300.00 |
| 500 | $29.75 | $14,875.00 |
EPM7256AETC144-7N 概述
A CPLD (Complex Programmable Logic Device) is a non-volatile, flash- or EEPROM-based programmable logic device that sits between simple SPLDs/PLDs and FPGAs in the programmable-logic hierarchy. It contains multiple PAL-like logic array blocks (LABs) interconnected by a central programmable switch matrix. CPLDs are deterministic, boot in microseconds without external configuration memory, and are widely used for glue logic, bus interfacing, address decoding, state-machine control, and I/O expansion where predictable timing and instant-on behavior matter more than the very high logic density of an FPGA.
Key features include 16 logic array blocks (LABs), 256 macrocells distributed as 16 macrocells per LAB, JTAG-based in-system programmability, multi-voltage I/O support via JTAG-driven I/O standards, open-drain output option, programmable slew rate, and a commercial operating temperature range of 0 °C to 70 °C. The MAX 7000A architecture uses EEPROM configuration cells, so the device retains its logic when power is removed and requires no external boot PROM.
The device is fabricated on an advanced CMOS EEPROM process. Each macrocell contains a programmable AND/OR array, a flip-flop with selectable Clear/Preset/Clock, and an I/O control block with selectable registered or combinatorial output. The 7.5 ns pin-to-pin delay (commercial grade) and 4.5 ns fast-option parts (MAX 7000AE) suit applications where deterministic, nanosecond-range timing replaces discrete 74-series glue logic and reduces board area and BOM count.
Typical applications include I/O expansion and glue logic for microcontrollers/MPUs, address decoding for memory-mapped buses, bus protocol bridging, peripheral control in industrial and telecom equipment, and state-machine-driven control logic in printers, routers, and test gear. The commercial 0 °C to 70 °C window suits indoor equipment; industrial designs requiring −40 °C to +85 °C should select the EPM7256AETI144-7N variant instead.
When designing with the EPM7256AETC144-7N, observe the 3.0 V to 3.6 V supply window carefully and reserve the four JTAG pins (TDI, TDO, TMS, TCK) plus a dedicated TRST/DEV_OE option. Inputs above 3.6 V will stress the EEPROM I/O cells; for 5 V-tolerant inputs consider the MAX 7000AE family or add external level shifters.
直接替换替代料： EPM7256AETC144-7N ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： EPM7256AETC144-7N （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Programming Interface, Configuration Memory, Maximum Internal Frequency.
快速对比工具——选择替代料号进行并排对比：
EPM7256AETI144-7N
✅ 直接替换✓ 有现货
$29.81 / 个
查看数据手册 →EPM7256AETC144-5N
✅ 直接替换✓ 有现货
$9.95 / 个
查看数据手册 →EPM7256AETC144-10N
✅ 直接替换✓ 有现货
$15.95 / 个
查看数据手册 →EPM7256AETC144-10
✅ 直接替换✓ 有现货
$31.4 / 个
查看数据手册 →EPM7256AETI144-7
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$53.55 / 个
查看数据手册 →EPM7256AETC144-7N 最大额定值与电气特性
| Series | MAX 7000A |
| Programmable Type | In System Programmable (EEPROM) |
| Number of Macrocells | 256 |
| Number of Logic Elements / Blocks (LABs) | 16 |
| Number of Usable Gates | 5,000 |
| Number of I/O | 120 (max user I/O) |
| Propagation Delay tpd(1) Max | 7.5 ns |
| Maximum Counter Frequency | 126.6 MHz |
| Supply Voltage - Internal | 3.0 V to 3.6 V |
| 工作温度 | 0 °C to 70 °C (Commercial) |
| 封装 / 外壳 | 144-LQFP (TQFP-144, 20x20 mm) |
| 安装类型 | Surface Mount |
| Programming Interface | IEEE 1149.1 JTAG (ISP) |
| Configuration Memory | EEPROM (non-volatile) |
| RoHS 状态 | Compliant |
EPM7256AETC144-7N 144-lqfp (tqfp-144, 20x20 mm) 引脚配置指南
EPM7256AETC144-7N（144-lqfp (tqfp-144, 20x20 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： EPM7256AETC144-7N.
请参阅 数据手册 以查看完整引脚配置。
典型应用
EPM7256AETC144-7N 适用于 6 应用s: Microcontroller / MPU I/O Expansion, Address Decoding and Chip-Select Generation, Industrial Control and Factory Automation, Legacy Bus Protocol Bridging, Telecom and Networking Line-Card Glue Logic, Test and Measurement Equipment.
Microcontroller / MPU I/O Expansion
The EPM7256AETC144-7N is well suited to expanding the limited I/O of a microcontroller or microprocessor. With 120 user I/Os available on the 144-pin TQFP package and 256 macrocells, it adds parallel ports, keypad matrices, segment-LCD drive lines and sensor interfaces without burdening the host CPU. The 7.5 ns pin-to-pin delay and 126.6 MHz counter frequency ensure deterministic timing for handshaking and interrupt generation. Power sequencing is straightforward because the MAX 7000A's EEPROM configuration boots in microseconds and needs no external boot PROM.
推荐
Address Decoding and Chip-Select Generation
The EPM7256AETC144-7N consolidates wide address decoders that previously required multiple 74LS138/139 PLD packages into one 144-pin TQFP CPLD. Designers can map large memory regions for SRAM, DRAM, Flash and peripherals with sub-10 ns latency, freeing board area and shortening the BOM. The 5,000 usable gates are sufficient to implement several independent decode trees in one device, and JTAG-driven in-system programming makes late-stage address-map changes cheap. The 3.3 V I/O is compatible with most modern ARM and MIPS host buses.
推荐
Industrial Control and Factory Automation
For glue logic on PLC backplanes, motor-driver front-ends and sensor-conditioning boards, the EPM7256AETC144-7N delivers deterministic state-machine control, PWM generation and protocol bridging in a single CPLD. Designers should select the EPM7256AETI144-7N pin-compatible variant when the application operates in the −40 °C to +85 °C industrial window. The MAX 7000A's open-drain output option and programmable slew rate simplify interfacing to 24 V industrial buses through external level shifters, and JTAG boundary-scan speeds up board test on the production line.
推荐
Legacy Bus Protocol Bridging
The EPM7256AETC144-7N bridges legacy parallel buses (ISA, PC/104, VME) to modern processors without glue-logic sprawl. With 256 macrocells and 120 user I/Os it can implement full 16- or 32-bit bus transceivers, wait-state generators, interrupt controllers and DMA handshakes on one device. The 7.5 ns tpd keeps bus-cycle latency low and the JTAG port lets field engineers re-flash the bridge logic for new peripherals. Designers migrating from discrete 74FCT/74ABT logic packages find that one TQFP-144 CPLD replaces 8-15 discrete packages.
推荐
Telecom and Networking Line-Card Glue Logic
Inside telecom line cards the EPM7256AETC144-7N handles time-slot switching, framer-to-DSP handshaking, alarm-collection and clock-distribution functions. Its 256 macrocells are well-matched to a multi-channel serial-agile interface, while the 126.6 MHz maximum counter frequency supports common 77.76 MHz and 155 MHz telecom clocks divided down. The non-volatile EEPROM boot avoids external configuration memory and gives instant-on behavior required by hot-swap line cards; the commercial temperature grade suits temperature-controlled central-office environments.
推荐
Test and Measurement Equipment
The EPM7256AETC144-7N is ideal for the digital-control backplane of oscilloscopes, logic analyzers and bench-top instruments where deterministic timing is mandatory. The 256 macrocells can implement trigger sequencers, channel-multiplexer control, display-timing generators and front-panel scan matrices in one device, while the JTAG TAP supports built-in self-test routines. The 7.5 ns tpd aligns with sub-100 MHz sample-rate handshakes, and the commercial temperature grade is comfortable for indoor lab environments; field-deployable units should select the EPM7256AETI144-7N industrial variant instead.
推荐
推荐产品汇总
工程参考数据： EPM7256AETC144-7N ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | EPM7256AETI144-7N | EPM7256AETC144-5N | EPM7256AETC144-10N | EPM7256AETC144-10 | EPM7256AETI144-7 |
|---|---|---|---|---|---|---|
| Brand | Intel | Intel | Intel | Intel | Intel | Intel |
| Package | TQFP-144 (20x20 mm) | TQFP-144 (20x20 mm) - same | TQFP-144 (20x20 mm) - same | TQFP-144 (20x20 mm) - same | TQFP-144 (20x20 mm) - same | TQFP-144 (20x20 mm) - same |
| Macrocells | 256 | 256 | 256 | 256 | 256 | 256 |
| Pin-to-Pin Delay tpd(1) | 7.5 ns | 7.5 ns | 5.0 ns | 10.0 ns | 10.0 ns | 7.5 ns |
| Operating Temperature | 0C to +70C (Commercial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Usable Gates | 5,000 | 5,000 | 5,000 | 5,000 | 5,000 | 5,000 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
关键差异点
- Mid-density MAX 7000A device with 256 macrocells and 120 I/Os in TQFP-144 （对比 EPM7128AETC144-7N)
- Faster 7.5 ns speed grade compared with the 10 ns mainstream grade （对比 EPM7256AETC144-10N)
- Drop-in industrial-temperature alternative available without PCB rework （对比 EPM7256AETI144-7N)
设计说明
Estimated: with VCC = 3.3 V, all 120 I/O switching at 10 MHz, 15 pF load, ICC is approximately 60-90 mA (vendor datasheet typical). Place a 0.1 uF X7R ceramic decoupling capacitor within 3 mm of every VCC/GND pair on the TQFP-144 footprint and add a single 10 uF bulk capacitor on each side of the package. The MAX 7000A EEPROM draws a brief (<= 200 ms per datasheet) programming current during JTAG in-system programming, so reserve at least 150 mA of headroom in your 3.3 V rail budget to avoid droop during ISP.
Reserve the four JTAG pins (TDI, TDO, TMS, TCK) on a dedicated 4-pin 2.54 mm header or 1.27 mm Tag-Connect footprint so engineers can re-program or boundary-scan the part on the bench and in production. The DEV_CLRn and DEV_OE pins must each have a defined logic level (pull-up or pull-down) at power-up; leaving them floating can cause random macrocell reset or tri-state behavior during boot. Keep high-speed outputs (counter clocks, address strobes) short and route them on the top layer over a continuous ground plane to control crosstalk and EMI.
Do not apply inputs above 3.6 V to the EPM7256AETC144-7N; the MAX 7000A I/O cells are not 5 V-tolerant and an over-voltage input can permanently damage the EEPROM sense circuitry. For designs that need 5 V interfacing, either select a 5 V MAX 7000 (non-A) variant or add external resistor-divider / level-shifter networks. Also confirm that VCC ramps monotonically between 0 V and 3.3 V at power-up; a slow or bouncing supply rail can put the device into an indeterminate state and cause POR-related macrocell glitches on the first clock cycle.
合规信息
RoHS compliance per Altera/Intel product page. Halogen-free status not explicitly disclosed in the datasheet excerpts; AEC-Q100 not applicable as this is a commercial-grade CPLD.
