EPM7256AETC144-10 - MAX 7000A 256-Macrocell CPLD, 10ns, TQFP-144 | Intel
MPN: EPM7256AETC144-10 ✗ Tapus ng BuhayEPM7256AETC144-10 Ulas
What is a CPLD? A Complex Programmable Logic Device is a non-volatile, flash- or EPROM-backed programmable logic device that combines multiple PLD-like Logic Array Blocks (LABs) on a single die with a global interconnect matrix. Architecturally a CPLD sits between simple SPLDs/GALs and large SRAM-based FPGAs: it provides deterministic, fast input-to-output propagation (typically 3-15 ns), zero external configuration memory, and is best suited to glue-logic, bus interfacing, address decoding, and state-machine replacement rather than DSP or high-register-count datapath designs. Within the wider taxonomy, CPLDs belong to the broader category of programmable logic devices (PLDs), which in turn sit under digital logic integrated circuits and ultimately under semiconductors. The EPM7256AETC144-10 occupies the high-density end of the MAX 7000A range and is widely used as a system-level integration device.
Key features that distinguish this part include 256 macrocells (equivalent to roughly 5,000 usable gates), 16 dedicated input pins, 36 bidirectional I/O pins, an f_MAX of approximately 95.2 MHz, and a 10 ns tPD that makes it the -10 speed-grade variant of the EPM7256AE family. The 'A' suffix indicates the 3.3 V core variant of MAX 7000A, the 'TC144' indicates the commercial-temperature TQFP-144 package, and the '-10' speed grade denotes the 10 ns propagation delay bin.
Typical applications include bus-interface bridging, address decoding for legacy microprocessors/microcontrollers, power-supply sequencing logic, I/O expansion, and replacement of multiple discrete TTL/CMOS glue-logic packages in industrial controllers, telecom line cards, and test equipment. Design considerations for engineers using this part include proper JTAG chain ordering when stacked with other boundary-scan devices, supply decoupling for the 3.3 V VCCINT and the I/O bank VCCIO rails, and unused-pin tie-off discipline per the MAX 7000A handbook. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not collected in any single datasheet source.
Mga alternatibo na pwedeng ilagay na EPM7256AETC144-10 — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok EPM7256AETC144-10 (parehas na form factor at footprint) — pagkakaiba sa Package, Programming Interface, Operating Temperature, Configuration Memory, Logic Array Blocks (LABs).
EPM7256AETC144-7
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
EPM7256AETC144-7N
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →EPM7256AETC144-10N
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →EPM7128AETC144-10
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →EPM7256AETC144-10 Mga Pinakamataas na Rating at Electrical Characteristics
| Family | MAX 7000A |
| Series | EPM7256AE |
| Device Type | CPLD (Complex Programmable Logic Device) |
| Macro Cells | 256 |
| Usable Gates | 5,000 |
| Logic Array Blocks (LABs) | 16 |
| Maximum User I/Os | 36 |
| Dedicated Inputs | 16 |
| Pin-to-Pin Delay (tPD) | 10 ns |
| Maximum Operating Frequency (fMAX) | 95.2 MHz |
| Core Supply Voltage (VCCINT) | 3.3 V |
| I/O Supply Voltage (VCCIO) | 3.3 V (5.0 V tolerant inputs on A-series) |
| Packhaging | 144-pin TQFP (TQFP-144) |
| Temperature na Operasyon | 0C to +70C (commercial) |
| Programming Interface | JTAG (IEEE 1149.1) + Fast Passive Serial |
| Non-Volatile Memory | EEPROM-based |
Gabay sa Pin Configuration ng EPM7256AETC144-10 144-pin tqfp (tqfp-144)
Pin configuration para sa EPM7256AETC144-10 (144-pin tqfp (tqfp-144) package). Kasama sa digital IC na ito ang GPIO, mga communication interface (UART, SPI, I2C), at mga power pin. Sumangguni sa datasheet ng manufacturer para sa mga alternatibong function ng pin at mga opsyon sa configuration. Mahalaga para sa disenyo ng embedded system at PCB layout.
Wala ng detalyadong pinout data na magagamit para sa EPM7256AETC144-10.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
EPM7256AETC144-10 ay nararapat para sa 6 aplikasyons: Legacy Bus Interface Bridging, Address Decoding and Chip-Select Generation, Industrial Control Glue Logic, Telecom Line-Card Interface Logic, Test and Measurement Front-End, Power-Supply Sequencing and Supervisor.
Legacy Bus Interface Bridging
The EPM7256AETC144-10 is widely deployed as a bus-bridging device between legacy 8/16/32-bit microprocessors and modern peripherals. With 256 macrocells, 36 user I/Os, and a deterministic 10 ns tPD, it can glue an 8051 external bus to a parallel ADC, multiplex address/data lines on an ISA-style card, or assemble/deserialize custom protocols in a single device. The 3.3 V core tolerates 5 V inputs, which matches mixed-voltage industrial backplanes where 5 V CPUs coexist with 3.3 V peripherals. Compared with implementing the same logic in discrete 74-series gates, a single CPLD cuts board area by roughly 70 percent, eliminates fan-out bottlenecks, and provides field-upgradeable functionality through JTAG reprogramming.
Inirekomenda
Address Decoding and Chip-Select Generation
Address decoding for memory-mapped systems is a canonical MAX 7000A use case, and the 256 macrocells of the EPM7256AETC144-10 can generate up to ~30 chip-select signals from a 24-bit address bus with comfortable margin. The 10 ns tPD combined with the global interconnect network lets the CPLD sit between a CPU and a bank of SRAM, Flash, and peripherals, asserting the correct chip-select well within a 33 MHz (30 ns) memory cycle. The deterministic timing of a non-volatile CPLD outperforms software-decoded alternatives and avoids any boot-time race conditions because the decoding logic is active immediately at power-up, no firmware required.
Inirekomenda
Industrial Control Glue Logic
Industrial PLCs and motor-drive controllers often need to replace tens of discrete 74HC/74LS packages with a single, deterministic, reprogrammable device. The EPM7256AETC144-10 in TQFP-144 provides 36 user I/Os at 10 ns tPD, more than enough to consolidate encoder decoding, watchdog timing, fault-logic aggregation, and PWM-muxing for a multi-axis stepper controller. The commercial 0C to +70C temperature range suits factory-floor enclosures, and the JTAG boundary-scan interface simplifies in-cabinet diagnostics. Compared with a small FPGA, the CPLD's zero-boot-time, EEPROM-backed configuration removes the need for an external boot PROM.
Inirekomenda
Telecom Line-Card Interface Logic
In telecom line cards the EPM7256AETC144-10 historically served as the I/O-expansion and protocol-formatting device between network processors and SERDES framer ICs. Its 256 macrocells support HDLC framing, per-channel enable/disable gating, alarm aggregation, and clock-domain crossing in a single chip, while the 5 V-tolerant inputs simplify mixed-voltage interfacing to legacy line-interface units. The non-volatile EEPROM configuration guarantees that the line card boots into a known-good state even after a brownout, a critical reliability attribute in carrier-grade equipment. Drop-in migration to the -7 or -7N speed-grade variant preserves the PCB while improving timing margin.
Inirekomenda
Test and Measurement Front-End
Bench instruments and ATE fixtures often need custom timing, pulse-stretching, and signal-routing logic that cannot be sourced from standard 74-series parts. The EPM7256AETC144-10 provides 256 macrocells of JTAG-reprogrammable logic with 10 ns deterministic delay, ideal for generating trigger patterns, multiplexing measurement channels, or implementing front-panel switch-debounce logic. The fast in-system programming of the EEPROM cell allows the same hardware to be re-tasked for different DUTs without changing the PCB. Compared with discrete gates, the CPLD reduces BOM count, eliminates wiring errors, and shortens development cycles.
Inirekomenda
Power-Supply Sequencing and Supervisor
Multi-rail systems - FPGA-based boards, ATCA carrier cards, and high-availability servers - require deterministic power-up and power-down sequencing that firmware cannot always guarantee. The EPM7256AETC144-10 can monitor four to eight rail-good signals, enforce monotonic turn-on, and drive enable pins of DC-DC converters with its 36 I/Os. Its 10 ns propagation delay ensures <100 ns fault response, well within typical converter hold-up times. Because the configuration is EEPROM-backed, the sequencing logic is in place at the first microsecond of power application, eliminating firmware-boot races.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for EPM7256AETC144-10 — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | EPM7256AETC144-7 | EPM7256AETC144-7N | EPM7256AETC144-10N | EPM7128AETC144-10 |
|---|---|---|---|---|---|
| Brand | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) |
| Package | TQFP-144 | TQFP-144 (same) | TQFP-144 (same) | TQFP-144 (same) | TQFP-144 (same) |
| Macrocells | 256 | 256 | 256 | 256 | 128 (-50%) |
| tPD (pin-to-pin) | 10 ns | 7.5 ns (faster) | 7.5 ns (faster) | 10 ns | 10 ns |
| User I/Os | 36 | 36 | 36 | 36 | 36 |
| Core Voltage (VCCINT) | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C |
| RoHS / Lead-Free | Unknown (legacy Altera) | Unknown | Yes (RoHS, N suffix) | Yes (RoHS, N suffix) | Unknown |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Pangunahing mga Pagkakaiba
- Higher logic density than the -128 alternative (kumpara saEPM7128AETC144-10)
- Faster speed grade available in same package (kumpara saEPM7256AETC144-7)
- RoHS-compliant variant exists with identical silicon (kumpara saEPM7256AETC144-10N)
Talaan ng Disenyo
Decouple VCCINT (3.3 V core) and VCCIO (3.3 V I/O bank) with a 100 nF ceramic capacitor placed within 5 mm of each supply pin, plus a single 10 uF bulk capacitor per supply rail. The MAX 7000A 'AE' family draws substantially higher inrush current during in-system programming (ISP); budget at least 100 mA headroom on the 3.3 V regulator and ensure the supply can source peak currents of 200 mA without sagging below 3.0 V. Add a 10 kohm pull-up on nCONFIG and nSTATUS to guarantee proper power-on reset sequencing per the MAX 7000A handbook.
Route JTAG signals (TDI, TDO, TMS, TCK) as a daisy chain with 22 ohm series-termination resistors placed near the driver, keeping the chain short and away from switching power-supply nodes. The TQFP-144 package has a 0.5 mm pitch and exposed thermal pad; use a 4-layer PCB with a continuous ground plane under the device and stitch the thermal pad with at least nine thermal vias to the inner ground plane for adequate heat dissipation (estimated theta_JA of approximately 35 C/W on a JEDEC 4-layer test board).
Do not leave unused I/O pins floating - configure them as outputs driving ground or as inputs with the internal weak pull-up enabled, otherwise floating inputs can draw additional supply current and may cause intermittent supply-current spikes. When migrating from EPM7256AETC144-10 to EPM7256AETC144-7N for RoHS compliance, verify that your assembly house supports the lead-free reflow profile (peak 245 C to 260 C) and that the JTAG IDCODE register still matches the BSDL file for boundary-scan test - the IDCODE is identical across all 144-pin MAX 7000A TQFP devices but should be re-validated in production ATE.
For clock signals above 50 MHz on the EPM7256AETC144-10's global clock networks, keep clock traces short (<25 mm), use 50 ohm controlled impedance, and avoid splitting the ground plane beneath the clock path. The MAX 7000A global interconnect skew is typically +/- 1 ns; for designs with multiple clock domains, place clock buffers near the center of each I/O bank to minimize skew across the 36 I/O pins.
Impormasyon ng Pagsunod sa Kautusan
Compliance status not stated in the verified web data; the EPM7256AETC144-10N suffix variant is widely described as lead-free / RoHS, but the base -10 part's status is [DATA_NEEDED]. AEC-Q100 is not applicable for a commercial-temperature CPLD.