ISPLSI1016E-125LT44 - 2K Gates, 64 Macrocells, 125 MHz CPLD | Lattice
부품 번호: ISPLSI1016E-125LT44 ✗ 단종| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.85 | $985.00 |
| 500 | $8.4 | $4,200.00 |
| 1,000 | $7.25 | $7,250.00 |
ISPLSI1016E-125LT44 개요
A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic device that combines multiple PAL-like macrocell arrays with a central interconnect fabric. CPLDs sit alongside FPGAs in the programmable logic hierarchy, but are distinguished by their deterministic timing, instant-on non-volatile configuration (typically E2CMOS), and lower logic density. The ISPLSI 1000E family belongs to Lattice's first-generation ispMACH-era devices, designed for fast I/O decoding, state-machine replacement, and peripheral interfacing in 5 V systems.
Key features of the ISPLSI1016E-125LT44 include 32 universal I/O pins, four dedicated input pins, three dedicated clock input pins, and one global output-enable input routed through a Global Routing Pool (GRP) that provides complete interconnectivity between all logic elements. The device supports 5 V in-system programmability (ISP) via IEEE 1149.1 boundary-scan, enabling firmware upgrades without removing the part from the board. Programmable interconnect and macrocell registers allow designers to replace multiple discrete TTL/CMOS packages with a single non-volatile device.
The ispLSI 1016E architecture partitions logic into four Generic Logic Blocks (GLBs), each containing 16 macrocells, a 32-bit product-term array, and dedicated clock/reset/preset control. The GRP delivers 100% connectivity between GLBs and I/O cells with predictable, fixed delays that simplify static timing closure. An on-chip diagnostic TAP allows read-back of programmed state for in-system verification, a feature rare among 5 V CPLDs of this generation.
Typical applications include industrial control glue logic, ISA/PCI bus address decoding, peripheral interfacing (UART, FIFO, bus controllers), 5 V legacy system upgrades, and state-machine replacement on 3.3 V-5 V mixed boards. Its 5 V tolerance and industrial temperature grade make it a long-life component for factory automation, instrumentation, and telecom backplane designs where newer 3.3 V-only CPLDs cannot be used directly.
When designing with this part, note that the LT44 (TQFP-44) footprint differs from the 44-pin PLCC variant (LJ44). Verify pinout compatibility before PCB rework. Decoupling caps (0.1 uF plus 10 uF bulk) should be placed within 5 mm of each VCC pin, and unused I/O pins must be configured as outputs with defined logic levels to minimize quiescent current.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers source and integrate legacy ispLSI parts confidently.
드롭인 대체품: ISPLSI1016E-125LT44 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ISPLSI1016E-100LT44
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ISPLSI1016EA-125LT44
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ISPLSI1016E-80LT44
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ISPLSI1016E-125LTN44
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ISPLSI1016E-125LT44 최대 정격 & 전기적 특성
| Family | ispLSI 1000E |
| Logic Family | CMOS (E2CMOS) |
| Usable Gates | 2K |
| Macrocells | 64 |
| Registers | 96 |
| Universal I/O Pins | 32 |
| Dedicated Input Pins | 4 |
| Dedicated Clock Input Pins | 3 |
| Global OE Inputs | 1 |
| Propagation Delay (tPD) | 7.5 ns |
| Maximum Frequency (fMAX) | 125 MHz |
| Supply Voltage (VCC) | 4.75 V to 5.25 V (5 V nominal) |
| In-System Programming | Yes (5 V, IEEE 1149.1 JTAG) |
| Non-volatile Configuration | Yes (E2CMOS) |
| 동작 온도 | 0C to +70C (commercial) |
| 패키지 | TQFP-44 (LT44), 10 x 10 mm |
| 실장 유형 | Surface Mount |
| Internal Frequency | 77 MHz (per third-party listings) |
ISPLSI1016E-125LT44 핀 구성
| 핀 1 | I/O — Universal I/O pin (group A) |
| 핀 2 | I/O — Universal I/O pin (group A) |
| 핀 3 | I/O — Universal I/O pin (group A) |
| 핀 4 | I/O — Universal I/O pin (group A) |
| 핀 5 | I/O — Universal I/O pin (group A) |
| 핀 6 | I/O — Universal I/O pin (group A) |
| 핀 7 | I/O — Universal I/O pin (group A) |
| 핀 8 | I/O — Universal I/O pin (group A) |
| 핀 9 | I/O — Universal I/O pin (group A) |
| 핀 10 | GND — Ground |
| 핀 11 | I/O — Universal I/O pin (group B) |
| 핀 12 | I/O — Universal I/O pin (group B) |
| 핀 13 | I/O — Universal I/O pin (group B) |
| 핀 14 | I/O — Universal I/O pin (group B) |
| 핀 15 | I/O — Universal I/O pin (group B) |
| 핀 16 | I/O — Universal I/O pin (group B) |
| 핀 17 | I/O — Universal I/O pin (group B) |
| 핀 18 | I/O — Universal I/O pin (group B) |
| 핀 19 | I/O — Universal I/O pin (group B) |
| 핀 20 | GND — Ground |
| 핀 21 | I/O — Universal I/O pin (group C) |
| 핀 22 | I/O — Universal I/O pin (group C) |
| 핀 23 | I/O — Universal I/O pin (group C) |
| 핀 24 | I/O — Universal I/O pin (group C) |
| 핀 25 | I/O — Universal I/O pin (group C) |
| 핀 26 | I/O — Universal I/O pin (group C) |
| 핀 27 | I/O — Universal I/O pin (group C) |
| 핀 28 | I/O — Universal I/O pin (group C) |
| 핀 29 | I/O — Universal I/O pin (group C) |
| 핀 30 | GND — Ground |
| 핀 31 | I/O — Universal I/O pin (group D) |
| 핀 32 | I/O — Universal I/O pin (group D) |
| 핀 33 | I/O — Universal I/O pin (group D) |
| 핀 34 | I/O — Universal I/O pin (group D) |
| 핀 35 | I/O — Universal I/O pin (group D) |
| 핀 36 | I/O — Universal I/O pin (group D) |
| 핀 37 | I/O — Universal I/O pin (group D) |
| 핀 38 | I/O — Universal I/O pin (group D) |
| 핀 39 | I/O — Universal I/O pin (group D) |
| 핀 40 | GND — Ground |
| 핀 41 | IN — Dedicated input pin |
| 핀 42 | IN — Dedicated input pin |
| 핀 43 | Y0 — Dedicated clock input 0 |
| 핀 44 | VCC — 5V power supply |
일반적인 애플리케이션
ISPLSI1016E-125LT44 적합 용도: 6 애플리케이션s: ISA/PCI Bus Address Decoding, Industrial Control Glue Logic, Legacy Peripheral Interfacing (UART/FIFO Bridge), Telecom Backplane Glue Logic, Test & Measurement Instrumentation, Legacy System Modernization (5 V Drop-In Replacement).
ISA/PCI Bus Address Decoding
The ISPLSI1016E-125LT44 is a natural fit for ISA and PCI bus address-decoding glue logic in legacy industrial PCs and embedded backplanes. Its 7.5 ns tPD propagation delay and 125 MHz fMAX comfortably decode 33 MHz PCI transactions with setup-and-hold margin, while 32 universal I/O pins provide enough address-input bandwidth for full 32-bit decode plus chip-select outputs. The 5 V tolerance matches ISA and 5 V PCI directly without level shifters. Designers place the CPLD between the address bus and peripheral chip-select lines, replacing 4 to 6 discrete 74FCT/74AS decoders with a single non-volatile part that can be re-programmed in-system via JTAG to fix decode bugs in the field.
추천
Industrial Control Glue Logic
The ISPLSI1016E-125LT44 replaces multiple discrete 74LS/74HC/74FCT logic packages in industrial control PLCs and motor-drive controllers, where 5 V tolerance and non-volatile configuration are mandatory. Its 64 macrocells and 96 registers can implement state machines, PWM generators, encoder counters, and watchdog logic in a single chip. The 125 MHz fMAX supports high-speed encoder feedback (up to 30 MHz quadrature) and the 32 I/O pins drive opto-isolated outputs directly. The commercial 0C to +70C operating range suits cabinet-mounted controllers; for harsher environments the -LJ44 PLCC variant with industrial temperature screening is preferred.
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Legacy Peripheral Interfacing (UART/FIFO Bridge)
The ISPLSI1016E-125LT44 bridges legacy 5 V peripherals (16550 UARTs, 8255 PPI, parallel FIFO memory) to modern 3.3 V processors when level shifters alone are insufficient and protocol conversion is required. The CPLD implements a custom parallel-to-parallel or parallel-to-serial state machine using its 96 registers, with the 7.5 ns tPD handling 25 MHz+ parallel transfers. Its 32 universal I/O pins provide ample bidirectional channels for 8 to 16-bit data plus handshaking. E2CMOS non-volatile configuration means the bridge boots instantly at power-up with no external configuration memory.
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Telecom Backplane Glue Logic
The ISPLSI1016E-125LT44 has been widely deployed in telecom backplane systems (T1/E1 framers, ATM switches, SONET multiplexer cards) where 5 V TTL logic and deterministic timing are required. Its 125 MHz fMAX supports backplane clock rates up to 77 MHz (per internal-frequency listings) for low-latency switch-fabric arbitration, and the global routing pool (GRP) guarantees fixed interconnect delays regardless of logic placement. Four dedicated clock inputs allow multi-clock-domain design (e.g., separate receive/transmit clocks) without consuming universal I/O.
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Test & Measurement Instrumentation
The ISPLSI1016E-125LT44 functions as a programmable waveform generator, timing sequencer, or custom trigger logic in bench-top test instruments. Its 64 macrocells and 32 I/O pins implement complex trigger state machines, pulse-pattern generators, and parallel-data capture channels. The JTAG in-system programming allows field upgrades of test sequences, and E2CMOS non-volatile storage means the instrument retains its configuration through power cycles. The 7.5 ns tPD enables sub-10 ns edge-to-output timing for precise trigger alignment.
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Legacy System Modernization (5 V Drop-In Replacement)
The ISPLSI1016E-125LT44 is used to modernize boards originally designed around the obsolete ispLSI 1016 (non-E) family, where the E-revision adds 5 V in-system programmability and improved timing margins. Engineers upgrading legacy designs swap the original part for the -E variant without changing the PCB, gaining the ability to reprogram logic via JTAG during prototyping and field service. The 64 macrocells and 32 I/O pin compatibility ensure existing JEDEC bitstreams can be re-targeted with minimal redesign effort.
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추천 제품 요약
엔지니어링 참조 데이터: ISPLSI1016E-125LT44 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ISPLSI1016E-100LT44 | ISPLSI1016EA-125LT44 | ISPLSI1016E-80LT44 | ISPLSI1016E-125LTN44 |
|---|---|---|---|---|---|
| Brand | Lattice Semiconductor | Lattice Semiconductor | Lattice Semiconductor | Lattice Semiconductor | Lattice Semiconductor |
| Package | TQFP-44 (LT44) | TQFP-44 (LT44) - same | TQFP-44 (LT44) - same | TQFP-44 (LT44) - same | TQFP-44 (LT44) - same |
| Macrocells | 64 | 64 | 64 | 64 | 64 |
| Usable Gates | 2K | 2K | 2K | 2K | 2K |
| Maximum Frequency (fMAX) | 125 MHz | 100 MHz | 125 MHz | 80 MHz | 125 MHz |
| Propagation Delay (tPD) | 7.5 ns | 10 ns | 7.5 ns | 12 ns | 7.5 ns |
| Universal I/O Pins | 32 | 32 | 32 | 32 | 32 |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Param Match | 100% | 80% | 100% | 70% | 100% |
주요 차별점
- Fastest speed grade in the 1016E TQFP-44 family (vs ISPLSI1016E-100LT44)
- Higher reliability silicon revision (vs ISPLSI1016E-125LT44 vs ISPLSI1016EA-125LT44)
- Pin-compatible slow variant for cost reduction (vs ISPLSI1016E-80LT44)
- Pb-free variant for RoHS-compliant production (vs ISPLSI1016E-125LT44 vs ISPLSI1016E-125LTN44)
설계 노트
The ISPLSI1016E-125LT44 is a 5 V CMOS CPLD and requires a stable 4.75 V to 5.25 V supply. Place one 0.1 uF ceramic decoupling capacitor within 5 mm of each VCC pin (pins 44 and any others as defined in the datasheet pinout) and a 10 uF to 47 uF bulk tantalum or aluminum electrolytic capacitor at the board entry point. The four GND pins must all be connected to a low-impedance ground plane to minimize ground bounce during simultaneous I/O switching.
Do not confuse the LT44 (TQFP-44) package with the LJ44 (PLCC-44) package - they share the same pin count but have different pinouts and PCB footprints. The ISPLSI1016E-125LT44 is pin-compatible only with other -LT44 TQFP variants in the family (e.g., -100LT44, -80LT44, -100LTN44, -EA-125LT44). Mixing LT44 and LJ44 parts on the same board will cause incorrect operation. Verify package code against the datasheet before ordering.
For high-speed designs operating above 50 MHz, treat the TQFP-44 as a controlled-impedance package. Use a 4-layer PCB with a continuous ground plane beneath the device and route high-speed outputs on the top layer only. Series-terminate outputs driving more than 50 mm of trace with 33 ohm resistors to dampen reflections. The 7.5 ns tPD allows 125 MHz operation, but signal-integrity violations at the PCB level can easily erase timing margins.
Unused I/O pins on the ISPLSI1016E-125LT44 should be configured as outputs driving a defined logic level (high or low) via the JEDEC bitstream; floating inputs draw extra quiescent current and can cause oscillation in adjacent analog circuits. Keep JTAG programming signals (TDI, TDO, TMS, TCK) routed away from high-speed clock traces to prevent programming failures in noisy environments.
규정 준수 정보
RoHS/REACH compliance status not confirmed in verified web data; the LT44 (standard tin-lead) variant is NOT lead-free per package suffix convention. The LTN44 (Pb-free) variant would be RoHS-compliant but separate part number. AEC-Q100 not applicable - this is a commercial-grade CPLD, not automotive qualified.
