EP1830-20CFN - 48-Macrocell CMOS EPLD, 22ns, PLCC-68 | TI
MPN: EP1830-20CFN ✗ Cuối đờiEP1830-20CFN Tóm tắt
An EPLD (Erasable Programmable Logic Device) is a non-volatile programmable logic device that uses CMOS EPROM cells to store the AND/OR array configuration. EPLDs sit within the programmable logic hierarchy below CPLDs and FPGAs: PLA -> PAL -> EPLD -> CPLD -> FPGA. Unlike SRAM-based FPGAs, EPLDs retain their configuration without external memory, making them well suited to deterministic, instant-on glue-logic replacement of multiple SSI/MSI gates in cost-sensitive designs.
Key features include 48 macrocells, 22 ns tPD (propagation delay), 12 dedicated inputs, 48 I/O pins, J-bend PLCC-68 footprint with 1.27 mm pitch, and CMOS low-power operation. The device typically consumes around 20 mA when operating at 1 MHz, and per the Jotrin product profile it can implement four 12-bit counters at up to 50 MHz. The -20 speed grade suffix indicates a 20 ns (or 22 ns per other sources) worst-case pin-to-pin delay, the fastest grade offered in the EP1830 family.
Architecturally, the EP1830 is built around a sum-of-products AND/OR array with programmable macrocell flip-flops, all wired through a global interconnect. The CMOS EPROM process provides non-volatility and zero standby current for the configuration, while a TTL-compatible I/O structure simplifies interface with legacy 5 V logic families such as 74LS, 74HC, and 74F. Commercial temperature grading (0C to 70C) targets office and light-industrial environments.
Typical applications include bus-interface decoding for 8086/80386 microprocessors, address decoding for memory and peripheral mapping, glue-logic consolidation replacing 74-series TTL gates, state-machine implementation, and counter/timer designs. The instant-on, deterministic timing of the EP1830 makes it especially attractive in safety-conscious or real-time control systems where SRAM-FPGA configuration delays are unacceptable.
When designing with the EP1830-20CFN, ensure the design tools used (e.g., MAX+PLUS II or compatible Altera-compatible third-party suites) match the JEDEC fuse-map output and that the I/O drive does not exceed the 5.25 V absolute-maximum supply. Unused I/O pins should be left floating or tied per the application note; the dedicated-input pins must remain at valid logic levels to avoid spurious supply current. As an older CMOS EPLD, the device should be handled with standard ESD precautions.
This page synthesizes distributor pricing, parametric alternatives, and practical design considerations not found in the standalone datasheet, giving engineers a single source for sourcing, replacement, and design validation of the EP1830-20CFN.
Bộ thay thế dễ dàng lắp đặt cho EP1830-20CFN — 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 EP1830-20CFN (cùng hình factor và footprint) — khác nhau ở Package, Technology, Propagation Delay (tPD), Mounting Type, Speed Grade.
EP1830LC-20
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EP1810LC-35
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP1810LC-25
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP1810LC-20
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP1810LI-35
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP1830-20CFN Tỷ lệ tối đa & tính chất điện
| Device Type | Erasable Programmable Logic Device (EPLD) |
| Technology | CMOS EPROM |
| Macrocell Count | 48 |
| Propagation Delay (tPD) | 22 ns |
| Maximum Supply Voltage | 5.25 V |
| I/O Pins | 48 |
| Dedicated Inputs | 12 |
| Hộp | PLCC-68 (QCCJ, J-lead) |
| Terminal Pitch | 1.27 mm |
| Terminal Form | J-Bend |
| Package Code | QCCJ |
| Package Shape | Square |
| Operating Temperature Grade | Commercial (0C to 70C) |
| Typical Operating Current | 20 mA at 1 MHz |
| Maximum Counter Frequency | 50 MHz (4 x 12-bit counters) |
| Speed Grade | -20 |
| Configuration Memory | Non-volatile EPROM (UV-erasable) |
Hướng dẫn cấu hình chân EP1830-20CFN square
Cấu hình chân cho EP1830-20CFN (square gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho EP1830-20CFN.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
EP1830-20CFN phù hợp cho 6 Áp dụngs: Microprocessor Bus-Interface Decoding, Glue-Logic Consolidation (74-Series TTL Replacement), State-Machine and Counter Implementation, Address Mapping for Memory and Peripherals, Custom Peripheral Interface Adapter, Legacy System Sustainment and Form-Fit-Function Replacement.
Microprocessor Bus-Interface Decoding
The EP1830-20CFN is well suited to legacy 8086/80386/Motorola 68000 bus decoding because its 48 macrocells comfortably absorb full-address decode for memory and peripheral chip-select maps, replacing 4-8 packages of 74LS138/139/154 decoders with a single non-volatile device. With 22 ns tPD and 48 I/O pins, it can decode a 24-bit address bus and generate 8-12 chip-selects in one pin-to-pin cycle, while its CMOS EPROM configuration guarantees instant-on deterministic timing at power-up. The PLCC-68 J-lead package drops directly onto the same through-hole or socketed PCB land pattern used by the legacy decoder chain. Designers should budget a 22 ns clock-to-output window for the slowest address-to-CS path and ensure the EP1830's 5.25 V VCCMAX is compatible with the host microprocessor's VCC rail.
Được đề xuất
Glue-Logic Consolidation (74-Series TTL Replacement)
Replacing 74LS/74F TTL gate packages with a single EP1830-20CFN reduces board area, power consumption, and BOM count while preserving deterministic 22 ns timing. Each macrocell emulates one 22V10-style sum-of-products term, so 48 macrocells map to roughly 24-32 equivalent 7400-series gates. CMOS operation lowers ICC to about 20 mA at 1 MHz versus multiple TTL packages, and the non-volatile EPROM bitstream eliminates the configuration download required by SRAM-based CPLDs. The PLCC-68 footprint fits standard IC sockets for socketed retrofits, and the 1.27 mm J-bend pitch is compatible with conventional PLCC sockets and rework hand tools.
Được đề xuất
State-Machine and Counter Implementation
The EP1830-20CFN's per-macrocell flip-flop array is well matched to Moore/Mealy state machines and multi-channel counters, and the Jotrin product brief notes the EP1830 family can implement four 12-bit counters at up to 50 MHz. Each counter consumes about 12 macrocells, leaving the remaining 48 minus 48 (full-macrocells) for cascaded or single-channel counters depending on partitioning. With 22 ns tPD and a global clock network, the device delivers deterministic state transitions without the metastability hazards of distributed 74LS161 counters. Industrial PLC sequencers, vending-machine controllers, and instrumentation timing generators are representative end products.
Được đề xuất
Address Mapping for Memory and Peripherals
Address decoding for ROM/RAM/DRAM banks and I/O peripherals is a classic EP1830-20CFN workload because the 12 dedicated inputs accept a full address slice while the 48 I/O pins drive the chip-select network. At 22 ns propagation delay the device sits comfortably between a 25 MHz 68020-style microprocessor address phase and the chip-select setup window, eliminating the address-to-CS skew of cascaded TTL decoders. The non-volatile EPROM array means no bootloader is required to configure the mapping, a benefit for boot-critical systems. PCB designers should treat the EP1830 like a high-pin-count PLCC device and provide a generous ground pour under the package to control switching noise on the parallel CS lines.
Được đề xuất
Custom Peripheral Interface Adapter
Building a custom ISA-bus, PC/104, or VME peripheral interface is straightforward with the EP1830-20CFN because the 48 I/O lines implement the data buffer, address latch, and interrupt-acknowledge logic in a single non-volatile device. The 22 ns tPD is fast enough for 8 MHz ISA bus cycles (125 ns period, 62.5 ns half-cycle) without wait states, and the EPROM-backed configuration preserves the interface personality across power cycles. Compared to discrete 74LS245/373/125 buffers plus a PAL, the EP1830 reduces part count from 6-8 ICs to 1 and provides reprogrammable personality for prototype iteration. Designers should add 4.7 kohm pull-ups on unused I/O pins to avoid floating-input ICC spikes.
Được đề xuất
Legacy System Sustainment and Form-Fit-Function Replacement
The EP1830-20CFN's primary long-term value is sustaining installed industrial and military systems whose original design relied on a MAX-family EPLD; using a fresh EP1830LC or pulling a tested EP1830-20CFN from the aftermarket preserves the exact PCB footprint and timing characteristics. With 22 ns tPD, 48 macrocells, and a PLCC-68 J-lead outline, it is a true form-fit-function replacement for the original design, avoiding costly board re-spins. The CMOS EPROM architecture requires no in-system programming infrastructure in the field, simplifying maintenance logistics. Engineers should derate the device 10-15% in timing margin to account for aging EPROM cell charge retention in long-lived installations.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EP1830-20CFN — 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 | EP1830LC-20 | EP1810LC-35 | EP1810LC-25 | EP1810LC-20 | EP1810LI-35 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | PLCC-68 (J-lead, QCCJ) | PLCC-68 (J-lead, QCCJ) | PLCC-68 (J-lead, QCCJ) | PLCC-68 (J-lead, QCCJ) | PLCC-68 (J-lead, QCCJ) | PLCC-68 (J-lead, QCCJ) |
| Macrocell Count | 48 | 48 | 24 | 24 | 24 | 24 |
| Propagation Delay (tPD) | 22 ns | 22 ns | 35 ns | 25 ns | 20 ns | 35 ns |
| Maximum Supply Voltage | 5.25 V | 5.25 V | 5.25 V | 5.25 V | 5.25 V | 5.25 V |
| Temperature Grade | Commercial (0C to 70C) | Commercial | Commercial | Commercial | Commercial | Industrial (-40C to 85C) |
| Configuration Memory | CMOS EPROM (UV-erasable) | CMOS EPROM | CMOS EPROM | CMOS EPROM | CMOS EPROM | CMOS EPROM |
| Parametric Match % | 100% (reference) | 100% | 70% | 80% | 80% | 70% |
Bảo phân biệt quan trọng
- Higher macrocell density than legacy 24-macrocell EPLDs in same package (vsEP1810LC-25)
- Faster speed grade than EP1810LC-35/45 alternatives (vsEP1810LC-35)
- Non-volatile EPROM configuration eliminates SRAM-FPGA boot delay (vsModern SRAM-based CPLDs (e.g., EPM7064S))
Ghi chú thiết kế
Estimated: with VCC = 5.0 V and I-typ = 20 mA at 1 MHz (per Jotrin brief), the EP1830-20CFN draws approximately 100 mW during continuous 1 MHz operation. At 50 MHz counter operation the dynamic current rises proportionally with frequency; budget 30-50 mA I-CC peak. Decouple VCC with a 0.1 uF ceramic cap placed within 5 mm of the PLCC-68 pin field and a 10 uF tantalum bulk cap on the same supply trace. The EP1830 has multiple VCC and GND pins; all must be connected, not just one pair, to avoid supply droop on high-frequency I/O transitions.
Do not exceed VCCMAX of 5.25 V; the EP1830-20CFN is a 5 V CMOS EPROM part and is NOT 5 V-tolerant on I/O when powered at 3.3 V. Unused I/O pins should be configured as outputs (to avoid floating-input supply current) or tied to GND through 10 kohm resistors. Dedicated-input pins must be driven to a valid logic level; floating dedicated inputs can cause internal oscillations and elevated I-CC. When programming with MAX+PLUS II, verify the JEDEC file targets the 'EP1830' device symbol, not the generic 'MAX7000' macro library, otherwise the fuse map will be invalid.
The PLCC-68 J-bend package requires a socket (e.g., 3M Textool or AMP PLCC-68) for in-system reprogrammability, because the EP1830 EPROM is UV-erasable through a quartz window on ceramic DIP variants - but the PLCC-68 plastic package is one-time-programmable (OTP) in production. Provide a 1.27 mm-pitch land pattern per IPC-SM-782 with at least 0.2 mm annular ring for wave-solder reliability. Maintain a continuous ground plane on the layer beneath the PLCC-68 footprint to control switching noise; route I/O signals on the opposite side or on inner layers to keep the PLCC socket area clear.
Thông tin tuân thủ
RoHS/REACH/lead-free compliance not stated in verified distributor data; legacy Altera EPLD parts are typically non-RoHS in original lots. AEC-Q100 not applicable - commercial/industrial temperature grade only.
