EPM7128ELC84-20 - MAX 7000 CPLD, 128MC, 20ns, 5V, PLCC-84 | Altera
MPN: EPM7128ELC84-20 ✗ Cuối đờiEPM7128ELC84-20 Tóm tắt
What is a CPLD? A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic device that sits between simple SPLDs (such as PALs and GALs) and FPGAs in the programmable logic hierarchy. CPLDs are characterized by instant-on (no configuration load time), deterministic timing, and low power consumption, making them ideal for glue-logic, bus interfacing, and state-machine tasks. The MAX 7000 family is based on Altera's second-generation MAX architecture and supports 100% TTL emulation while integrating SSI, MSI, and LSI logic functions on a single device.
Key features of the EPM7128ELC84-20 include 5V core operation, 2500 typical gates (the -20 speed grade corresponds to a 20 ns tPD and approximately 125 MHz in-system performance), in-system programmability via the IEEE Std. 1149.1 (JTAG) interface, and four pin-compatible speed grades (-5, -7, -10, -12, -15, -20) that allow designers to migrate between speed and power trade-offs without PCB rework. The device is fabricated on an EEPROM-based process, providing non-volatile storage of the configuration so the part powers up instantly programmed.
Architecturally, the EPM7128ELC84-20 implements the Logic Array Blocks (LABs) connected through the Programmable Interconnect Array (PIA). Each macro cell contains a programmable AND/OR array with a flip-flop, shareable expanders, and a configurable I/O architecture supporting 3.3V or 5V interface levels. The 84-pin PLCC (J-Lead) package has a JEDEC MS-018 footprint and supports 68 user I/O with 4 dedicated inputs (GCLK, OE2/GCLK2, OE1, CLR) plus TDI, TDO, TMS, TCK for JTAG.
Typical applications include address decoding and bus-interface glue logic in 5V microprocessor systems, peripheral control in industrial automation, I/O expansion and signal conditioning in legacy telecom equipment, and prototyping platforms that benefit from instant-on programmable logic. Compared to FPGAs, the MAX 7000 family excels at deterministic combinatorial paths and is widely used in PC/104, ISA, and 8051-family bus arbiter designs.
When designing with this part, note that the PLCC-84 J-Lead package requires a through-hole or socket footprint, which makes field replacement easy. Designers should follow Altera's MAX 7000 family datasheet guidelines for power decoupling (typically 0.1 uF + 10 uF bulk near VCC pins) and unused-pin termination (tie unused I/Os to VCC or GND through 10 kohm to minimize quiescent current).
This page synthesizes distributor pricing, drop-in 5V same-package alternatives within the MAX 7000 family, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho EPM7128ELC84-20 — 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 EPM7128ELC84-20 (cùng hình factor và footprint) — khác nhau ở Mounting Type, RoHS Status, Package, Family, Supply Voltage (VCCINT).
EPM7128ELC84-15
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EPM7128ELC84-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM7128ELC84-10
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM7128AELC84-10N
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM7128ELI84-20
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM7128SLC84-6N
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPM7128ELC84-20 Tỷ lệ tối đa & tính chất điện
| Series | MAX 7000 |
| Device Family | EPM7128 (CPLD) |
| Number of Macrocells | 128 |
| Number of Usable Gates | 2500 |
| Number of User I/Os | 68 |
| Number of Logic Array Blocks (LABs) | 8 |
| Propagation Delay (tPD) | 20 ns |
| Maximum Frequency (fCNT) | 62.5 MHz |
| Supply Voltage (VCC) | 5 V |
| Supply Voltage Tolerance | 4.75 V to 5.25 V |
| Technology | CMOS, EEPROM-based (non-volatile) |
| Programmable Interface | IEEE Std. 1149.1 (JTAG) |
| Package Type | PLCC-84 (J-Lead, J-bend) |
| Kiểu lắp đặt | Surface Mount (PLCC socket compatible) |
| Nhiệt độ hoạt động | 0C to +70C (commercial) |
| Trạng thái RoHS | Contains lead (pre-RoHS, SnPb finish) |
Cấu hình chân EPM7128ELC84-20
| Chân 1 | I/O — User I/O (macrocell pin) |
| Chân 2 | I/O — User I/O (macrocell pin) |
| Chân 3 | I/O — User I/O (macrocell pin) |
| Chân 4 | I/O — User I/O (macrocell pin) |
| Chân 5 | I/O — User I/O (macrocell pin) |
| Chân 6 | I/O — User I/O (macrocell pin) |
| Chân 7 | I/O — User I/O (macrocell pin) |
| Chân 8 | I/O — User I/O (macrocell pin) |
| Chân 9 | I/O — User I/O (macrocell pin) |
| Chân 10 | I/O — User I/O (macrocell pin) |
| Chân 11 | I/O — User I/O (macrocell pin) |
| Chân 12 | TDI — JTAG Test Data In |
| Chân 13 | I/O — User I/O (macrocell pin) |
| Chân 14 | I/O — User I/O (macrocell pin) |
| Chân 15 | VCC — 5V supply |
| Chân 16 | I/O — User I/O (macrocell pin) |
| Chân 17 | I/O — User I/O (macrocell pin) |
| Chân 18 | I/O — User I/O (macrocell pin) |
| Chân 19 | I/O — User I/O (macrocell pin) |
| Chân 20 | I/O — User I/O (macrocell pin) |
| Chân 21 | GND — Ground |
| Chân 22 | I/O — User I/O (macrocell pin) |
| Chân 23 | I/O — User I/O (macrocell pin) |
| Chân 24 | I/O — User I/O (macrocell pin) |
| Chân 25 | I/O — User I/O (macrocell pin) |
| Chân 26 | I/O — User I/O (macrocell pin) |
| Chân 27 | I/O — User I/O (macrocell pin) |
| Chân 28 | I/O — User I/O (macrocell pin) |
| Chân 29 | I/O — User I/O (macrocell pin) |
| Chân 30 | I/O — User I/O (macrocell pin) |
| Chân 31 | GND — Ground |
| Chân 32 | I/O — User I/O (macrocell pin) |
| Chân 33 | I/O — User I/O (macrocell pin) |
| Chân 34 | I/O — User I/O (macrocell pin) |
| Chân 35 | I/O — User I/O (macrocell pin) |
| Chân 36 | I/O — User I/O (macrocell pin) |
| Chân 37 | I/O — User I/O (macrocell pin) |
| Chân 38 | I/O — User I/O (macrocell pin) |
| Chân 39 | TMS — JTAG Test Mode Select |
| Chân 40 | VCC — 5V supply |
| Chân 41 | I/O — User I/O (macrocell pin) |
| Chân 42 | I/O — User I/O (macrocell pin) |
| Chân 43 | I/O — User I/O (macrocell pin) |
| Chân 44 | I/O — User I/O (macrocell pin) |
| Chân 45 | I/O — User I/O (macrocell pin) |
| Chân 46 | I/O — User I/O (macrocell pin) |
| Chân 47 | I/O — User I/O (macrocell pin) |
| Chân 48 | I/O — User I/O (macrocell pin) |
| Chân 49 | GND — Ground |
| Chân 50 | I/O — User I/O (macrocell pin) |
| Chân 51 | GCLK — Global Clock (dedicated input) |
| Chân 52 | OE2/GCLK2 — Global OE / Global Clock 2 (dedicated input) |
| Chân 53 | I/O — User I/O (macrocell pin) |
| Chân 54 | I/O — User I/O (macrocell pin) |
| Chân 55 | I/O — User I/O (macrocell pin) |
| Chân 56 | I/O — User I/O (macrocell pin) |
| Chân 57 | I/O — User I/O (macrocell pin) |
| Chân 58 | I/O — User I/O (macrocell pin) |
| Chân 59 | I/O — User I/O (macrocell pin) |
| Chân 60 | I/O — User I/O (macrocell pin) |
| Chân 61 | TCK — JTAG Test Clock (dedicated input) |
| Chân 62 | VCC — 5V supply |
| Chân 63 | I/O — User I/O (macrocell pin) |
| Chân 64 | I/O — User I/O (macrocell pin) |
| Chân 65 | I/O — User I/O (macrocell pin) |
| Chân 66 | I/O — User I/O (macrocell pin) |
| Chân 67 | I/O — User I/O (macrocell pin) |
| Chân 68 | I/O — User I/O (macrocell pin) |
| Chân 69 | I/O — User I/O (macrocell pin) |
| Chân 70 | I/O — User I/O (macrocell pin) |
| Chân 71 | GND — Ground |
| Chân 72 | I/O — User I/O (macrocell pin) |
| Chân 73 | I/O — User I/O (macrocell pin) |
| Chân 74 | OE1 — Global Output Enable 1 (dedicated input) |
| Chân 75 | I/O — User I/O (macrocell pin) |
| Chân 76 | I/O — User I/O (macrocell pin) |
| Chân 77 | I/O — User I/O (macrocell pin) |
| Chân 78 | I/O — User I/O (macrocell pin) |
| Chân 79 | I/O — User I/O (macrocell pin) |
| Chân 80 | I/O — User I/O (macrocell pin) |
| Chân 81 | TDO — JTAG Test Data Out |
| Chân 82 | VCC — 5V supply |
| Chân 83 | I/O — User I/O (macrocell pin) |
| Chân 84 | CLR — Global Clear (dedicated input) |
Ứng dụng tiêu biểu
EPM7128ELC84-20 phù hợp cho 6 Áp dụngs: Microprocessor Address Decoding & Glue Logic, Legacy Industrial Control & Automation, PC/104, ISA, and VME Bus Interface Cards, Telecom & Networking Backplane Glue, Prototyping & Educational Logic Development, Aerospace & Defense Avionics Interfaces.
Microprocessor Address Decoding & Glue Logic
The EPM7128ELC84-20 excels at address decoding and bus-interface glue logic in 5V microprocessor systems. Its 128 macro cells and 68 user I/Os are well-matched to combine multiple 74LS/74F-series decoders, latches, and arbiters into a single instant-on non-volatile device. With 20 ns tPD the part sits comfortably below the propagation budget of 8051, 80188, and 68k-era CPU buses running at 25 MHz. The 5V VCC and TTL-compatible I/O thresholds interface directly with 5V peripherals without level shifting, and the JTAG-supported in-system programmability allows late-stage PCB revisions without socket rework. Compared to discrete SSI/MSI logic, the CPLD reduces board area, lowers power via internal optimization, and provides documented timing that simplifies static-timing analysis.
Được đề xuất
Legacy Industrial Control & Automation
In legacy industrial control racks, the EPM7128ELC84-20 consolidates PLC-style state machines, encoder quadrature decoders, and PWM generators into a single 5V programmable device. Its instant-on EEPROM configuration means no boot PROM and no watchdog reset is needed after power cycling, which is critical for unattended factory floor installations. The PLCC-84 J-Lead package accepts standard industrial sockets, simplifying field replacement without desoldering. With 2500 usable gates the CPLD handles multi-axis motion control logic, I/O debouncing, and serial protocol framing (RS-232/485 glue) in one chip. Industrial designers should choose the EPM7128ELI84-20 industrial-temperature variant for -40C to +85C environments; it is pin-compatible and drop-in replaceable on the same PLCC-84 footprint.
Được đề xuất
PC/104, ISA, and VME Bus Interface Cards
PC/104, ISA, and VME expansion cards traditionally use CPLDs to implement bus arbitration, address mapping, and interrupt steering, and the EPM7128ELC84-20 was a popular choice for these applications. Its 5V TTL-compatible I/Os match the original ISA bus levels directly, and the 68 available user I/Os are sufficient for 16-bit data plus 24-bit address plus control-signal decoding in one device. The 20 ns tPD adds only 1 wait-state to 8 MHz ISA cycles and is adequate for 12 MHz designs. In-system JTAG programming allows the same card to be re-used across multiple SKUs by re-flashing the CPLD bitstream, reducing inventory cost. Designers migrating to PCI or PCIe must replace both connector and logic; the EPM7128 family is not suited to 3.3V/33 MHz PCI signaling.
Được đề xuất
Telecom & Networking Backplane Glue
The EPM7128ELC84-20 was widely used in telecom line cards and networking backplanes for protocol conversion, clock-domain crossing, and TDM bus multiplexing. Its 5V tolerant I/Os interface with E1/T1 line-interface units (LIUs) and legacy TTL backplane logic, while the 8 LABs allow independent clock-domain FIFOs and rate-adaptation state machines. The deterministic 20 ns tPD simplifies meeting the hold-time requirements of source-synchronous backplane buses such as H.110 (CT Bus). Designers building new designs should note that the MAX 7000 family lacks 3.3V I/O, so ATCA or AMC backplanes will require the EPM7128SLC84-6N (3.3V core) or migration to MAX II/MAX V families with multi-voltage I/O support.
Được đề xuất
Prototyping & Educational Logic Development
The EPM7128ELC84-20 is a staple of university digital-logic laboratories and hobbyist prototyping platforms because it provides enough macro cells (128) for full single-cycle RISC CPU cores, custom peripherals, and bus controllers while remaining instantly reprogrammable via inexpensive JTAG cables such as the Altera ByteBlaster. Its 5V supply eliminates level-shifting concerns when interfacing to legacy TTL lab equipment, and the PLCC-84 socket accepts standard 84-pin machine-tooled ZIF sockets for quick swap-out during lab sessions. The well-documented MAX 7000 family reference designs in the Altera University Program include UART cores, VGA controllers, and 7-segment display drivers that target this exact density. Educators should pair the EPM7128ELC84-20 with a stable 5V/1A linear regulator and 0.1 uF + 10 uF decoupling per VCC pin to ensure repeatable student results.
Được đề xuất
Aerospace & Defense Avionics Interfaces
The EPM7128ELC84-20 has historically been used in avionics LRUs (Line Replaceable Units) for ARINC 429, MIL-STD-1553, and discrete-signal interface glue because its deterministic timing, instant-on EEPROM, and wide operating temperature (when paired with the I-grade variant) suit DO-254 and MIL-HDBK-454 design flows. The 68 user I/Os multiplex the receive/transmit channels of up to 4 ARINC 429 buses with parity generation, while the 8 LABs implement channel-decoding state machines. The PLCC-84 socket allows field replacement at forward operating bases without specialized rework tools. New avionics designs targeting DO-254 DAL A/B should consider the B-grade processed EPM7128ELI84-20 with extended temperature and traceability documentation, which is pin-compatible on the same PLCC-84 footprint.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EPM7128ELC84-20 — 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 | EPM7128ELC84-15 | EPM7128ELC84-12 | EPM7128ELC84-10 | EPM7128AELC84-10N | EPM7128ELI84-20 | EPM7128SLC84-6N |
|---|---|---|---|---|---|---|---|
| Brand | Altera (now Intel) | Altera (now Intel) | Altera (now Intel) | Altera (now Intel) | Altera (now Intel) | Altera (now Intel) | Altera (now Intel) |
| Package | PLCC-84 (J-Lead) | PLCC-84 (J-Lead) | PLCC-84 (J-Lead) | PLCC-84 (J-Lead) | PLCC-84 (J-Lead) | PLCC-84 (J-Lead) | PLCC-84 (J-Lead) |
| Supply Voltage (VCC) | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 3.3 V |
| Propagation Delay (tPD) | 20 ns | 15 ns (-25%) | 12 ns (-40%) | 10 ns (-50%) | 10 ns (-50%) | 20 ns (0%) | 6 ns (-70%) |
| Maximum Frequency | 62.5 MHz | 83.3 MHz | 100 MHz | 125 MHz | 125 MHz | 62.5 MHz | 166.7 MHz |
| Number of Macrocells | 128 | 128 | 128 | 128 | 128 | 128 | 128 |
| Number of User I/Os | 68 | 68 | 68 | 68 | 68 | 68 | 68 |
| Operating Temperature | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C | -40C to +85C | 0C to +70C |
| RoHS Compliance | No (SnPb finish) | No (SnPb finish) | No (SnPb finish) | No (SnPb finish) | Yes (lead-free) | No (SnPb finish) | No (SnPb finish) |
Bảo phân biệt quan trọng
- Slowest speed grade (-20) at lowest price point in MAX 7000 family (vsEPM7128ELC84-15)
- Drop-in industrial-temperature upgrade available (vsEPM7128ELI84-20)
- 5V core matches legacy TTL systems directly (vsEPM7128SLC84-6N)
Ghi chú thiết kế
The EPM7128ELC84-20 has multiple VCC pins (PLCC-84 pins 15, 40, 62, 82) that must each be decoupled with a 0.1 uF ceramic capacitor placed within 5 mm of the pin. Add a single bulk 10 uF tantalum or aluminum-polymer capacitor per VCC group to suppress switching transients during simultaneous-output switching (SSO). The I-grade variant draws similar quiescent current but extended temperature may increase I/O leakage; budget 50 mA typical ICC at full toggle.
The PLCC-84 J-Lead package (JEDEC MS-018) requires a 1.27 mm pitch land pattern with chamfered pin-1 indicator. For prototype work, install a through-hole PLCC socket (e.g., 3M 84-pin machined-pin socket) so the device can be swapped without desoldering - critical when working with obsolete parts where replacement stock may be limited. Production boards may solder the PLCC directly, but plan for a 1.5 mm keepout under the package body for cleaning and inspection.
Three pitfalls are commonly missed in MAX 7000 designs: (1) Unused I/O pins must be tied to GND through 10 kohm (or driven as outputs) to avoid floating-input quiescent-current spikes - leaving them open can add several mA of Icc. (2) The JTAG chain TDI->TDO order must match the BSDL file; reversing TDI/TDO causes programming failure but the device still functions normally. (3) The MAX 7000 family is 5V-only on the E-suffix parts - mixing 3.3V peripherals on the I/O bank requires the EPM7128SLC variant instead; do not exceed 5.25 V on VCC.
Thông tin tuân thủ
EPM7128ELC84-20 is a pre-RoHS part with SnPb finish on PLCC-84 leads; REACH compliance unknown per Intel/Altera product page. For RoHS-compliant equivalents choose EPM7128AELC84-10N in the same PLCC-84 footprint.
