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HomeProductsIntegrated Circuits (ICs)Embedded - CPLDs (Complex Programmable Logic Devices)LC4128V-5TN128C
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LC4128V-5TN128C - Lattice Semiconductor Corporation

Manufacturer Part Number
LC4128V-5TN128C
Manufacturer
Lattice Semiconductor
Allelco Part Number
32D-LC4128V-5TN128C
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
4,379 pcs available, New & Original
Parts Description
IC CPLD 128MC 5NS 128TQFP
Package
128-TQFP (14x14)
Data sheet
LC4128V-5TN128C.pdf

Getting Started Guide

Product Selector Guide.pdf

Manuals

2.73KHz.pdf
RoHs Status
ROHS3 Compliant
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In stock: 4379

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Specifications

LC4128V-5TN128C Tech Specifications
Lattice Semiconductor Corporation - LC4128V-5TN128C technical specifications, attributes, parameters and parts with similar specifications to Lattice Semiconductor Corporation - LC4128V-5TN128C

Product Attribute Attribute Value
Manufacturer Lattice Semiconductor
Voltage Supply - Internal 3V ~ 3.6V
Supplier Device Package 128-TQFP (14x14)
Series ispMACH® 4000V
Programmable Type In System Programmable
Package / Case 128-LQFP
Package Tray
Product Attribute Attribute Value
Operating Temperature 0°C ~ 90°C (TJ)
Number of Macrocells 128
Number of Logic Elements/Blocks 8
Number of I/O 92
Mounting Type Surface Mount
Delay Time tpd(1) Max 5 ns
Base Product Number LC4128

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

LC4128V-5TN128C Image
LC4128V-5TN128C (1)

Manufacturer Part Number

LC4128V-5TN128C

Manufacturer

Lattice Semiconductor

Introduction

High-density programmable logic device with in-system programmability and high performance

Product Features and Performance

Complex Programmable Logic Device (CPLD)

In system programmable for high flexibility

5 ns maximum delay time providing quick signal processing

Internal voltage supply ranging from 3V to 3.6V

8 logic elements/blocks for complex logic functions

128 macrocells for ample programmable logic resources

92 input/output pins for extensive interfacing capabilities

Surface mount 128-LQFP package for compact PCB designs

Product Advantages

Efficient design and re-programmability for rapid prototyping

Low power consumption suited for power-sensitive applications

Large number of I/Os to interface with a variety of devices

Extended operating temperature range suitable for industrial applications

Key Technical Parameters

Programmable Type: In System Programmable

Delay Time tpd(1) Max: 5 ns

Voltage Supply Internal: 3V ~ 3.6V

Number of Logic Elements/Blocks: 8

Number of Macrocells: 128

Number of I/O: 92

Operating Temperature: 0°C ~ 90°C (TJ)

Quality and Safety Features

Rigorous testing to ensure high reliability and stability

Compatibility

ISP upgradable to adapt with future technological changes

Compatible with a wide range of PCB design standards

Application Areas

Telecommunications

Computing

Consumer Electronics

Industrial Automation

Automotive Systems

Product Lifecycle

Product Status: Active

Not nearing discontinuation with ongoing support and updates

Several Key Reasons to Choose This Product

High integration capability for complex logic designs

In-system programmability allows for easy updates and modifications

Lower power usage for energy-efficient designs

Versatility in application across multiple industries

Ready for immediate deployment in commercial and industrial environments

Proven track record from a reputable semiconductor manufacturer

Robust technical support and documentation from Lattice Semiconductor

Frequently Asked Questions(FAQ)

How does the LC4128V-5TN128C compare to other CPLDs in terms of propagation delay and power consumption for high-speed control applications?
The LC4128V-5TN128C delivers a maximum propagation delay of 5 ns, which positions it favorably among mid-range CPLDs targeting real-time control logic. This low tpd enables it to support clock frequencies up to approximately 200 MHz under typical load conditions, making it suitable for precision timing tasks such as motor control or industrial automation. Compared to older-generation CPLDs with delays exceeding 10 ns, this device reduces critical path latency by nearly half, improving system responsiveness. While not as fast as FPGAs optimized for high-performance computing, its balance of deterministic timing and moderate power draw—around 30–50 mW at 3.3 V—makes it a practical choice where area and power are constrained but timing precision is required.
What design considerations should be taken into account when integrating the LC4128V-5TN128C into a 3.3 V digital system with tight thermal constraints?
When using the LC4128V-5TN128C in a 3.3 V environment, designers must ensure stable power delivery within the 3 V to 3.6 V operating range to maintain reliable operation. The device’s 92 I/O pins support bidirectional signaling compatible with standard 3.3 V CMOS levels, simplifying interfacing with microcontrollers and memory devices. However, due to its 128-macrocell architecture drawing peak currents of up to 50 mA during active switching, decoupling capacitors (e.g., 0.1 µF ceramic near each power pin) are essential to suppress voltage droop and prevent glitches. In thermally constrained layouts, the 128-LQFP package’s exposed thermal pad should be connected to a solid ground plane to dissipate heat efficiently; otherwise, junction temperatures may exceed 90°C even under moderate utilization, potentially triggering thermal shutdown.
Can the LC4128V-5TN128C be reprogrammed in-system after deployment, and what impact does this have on field maintenance strategies?
Yes, the LC4128V-5TN128C supports In System Programming (ISP), allowing firmware updates without removing the IC from the board. This capability enhances field upgradability and reduces hardware return costs. The ISP protocol operates over a standard JTAG interface, enabling batch programming of multiple units via boundary-scan chains. However, designers must allocate sufficient flash endurance cycles (typically >1,000 for EEPROM-based ISP architectures) and implement version control mechanisms to avoid accidental overwrite errors. From a reliability standpoint, periodic reprogramming introduces negligible risk if proper ESD precautions are followed, though it eliminates the need for socketed designs that could degrade over time.
How many macrocells does the LC4128V-5TN128C provide, and how should this influence logic partitioning decisions in complex state machines?
The LC4128V-5TN128C contains 128 macrocells, each configurable as a logic function generator with programmable AND/OR arrays. These macrocells are organized into eight logic blocks, providing 16 macrocells per block on average. For designing large finite state machines (FSMs), this structure encourages modular decomposition: dividing the FSM into submodules that map cleanly onto individual logic blocks minimizes routing congestion and improves timing closure. Given the 5 ns worst-case delay, complex combinational paths spanning multiple macrocells must be carefully balanced to stay below the target clock period. Tools like Lattice Diamond can assist in mapping optimizations, but manual constraint tuning is often necessary for FSMs exceeding 20 states.
What is the moisture sensitivity level (MSL) rating of the LC4128V-5TN128C, and how does this affect PCB assembly handling procedures?
The LC4128V-5TN128C has an MSL rating of 3, indicating it can withstand one reflow cycle after being stored for up to 168 hours (7 days) under controlled ambient conditions before requiring bake-out. During SMT assembly, operators must adhere to IPC/JEDEC J-STD-033 guidelines: components should remain sealed until just before placement, and open trays must be used within the specified floor life. Exceeding this window increases the risk of popcorning during reflow due to absorbed moisture vaporizing rapidly. Facilities without humidity-controlled storage may need to pre-dry batches or use desiccant-based packaging to preserve reliability.
How does the number of I/O pins (92) on the LC4128V-5TN128C impact board layout density compared to smaller-footprint alternatives?
With 92 general-purpose I/Os spread across a 14×14 mm TQFP footprint, the LC4128V-5TN128C offers moderate pin density suitable for medium-complexity control logic boards. While less compact than QFN-packaged alternatives (e.g., 64-pin variants), the LQFP format provides excellent solder joint visibility and reworkability—critical for prototyping and low-volume production. The trade-off is increased PCB real estate versus ultra-miniature solutions, but for designs requiring extensive external connectivity (e.g., sensor interfaces or peripheral buses), the I/O count justifies the space. Layout engineers should route signals symmetrically around the central thermal pad to minimize skew and crosstalk, especially for high-speed differential pairs routed through adjacent pins.
Is the LC4128V-5TN128C RoHS3 compliant, and what regulatory implications does this have for global market distribution?
Yes, the LC4128V-5TN128C is fully RoHS3 compliant, meaning it meets all current European Union restrictions on hazardous substances including lead, mercury, cadmium, hexavalent chromium, PBB, PBDE, and four phthalates (DEHP, BBP, DBP, DIBP). This compliance ensures unrestricted access to major markets such as Europe, North America, and most of Asia without additional certification burdens. Manufacturers importing this part into regulated jurisdictions can confidently include it in product declarations without needing exemption documentation, streamlining supply chain audits and reducing time-to-market risks associated with non-compliance penalties.
What ECCN classification applies to the LC4128V-5TN128C, and how might this affect export controls in certain regions?
The LC4128V-5TN128C carries an ECCN (Export Control Classification Number) of EAR99, indicating it is subject to U.S. Export Administration Regulations but generally exempt from stringent licensing requirements due to its civilian application profile. This classification means the component can typically be shipped internationally without special permits, provided end-use remains non-military and non-proliferation-sensitive. However, exporters should still verify local regulations in destination countries, as some jurisdictions impose their own restrictions regardless of U.S. classifications. For sensitive projects involving encryption or defense systems, further screening against the Commerce Control List (CCL) is advisable despite the EAR99 status.
How does the operating temperature range (0°C to 90°C) of the LC4128V-5TN128C constrain its use in automotive or industrial environments?
The LC4128V-5TN128C’s commercial-grade temperature range (0°C to 90°C) limits its direct use in harsh industrial or automotive applications where extended ambient temperatures (−40°C to +125°C) are common. While acceptable for office or consumer electronics, designs requiring automotive-grade qualification (AEC-Q100) would necessitate alternative parts. However, in controlled industrial settings with adequate cooling or enclosure climate management, the device can perform reliably. Designers considering borderline cases should conduct accelerated life testing under elevated temperatures to validate long-term stability, particularly given the potential for increased leakage currents near the upper limit.
What is the significance of the “ispMACH® 4000V” series designation for the LC4128V-5TN128C in terms of technology node and performance scalability?
The “ispMACH 4000V” series denotes a family of CPLDs built on Lattice’s 0.5 µm CMOS process technology, offering improved noise immunity and lower static power compared to earlier generations. The “V” suffix specifically identifies the 3.3 V variant optimized for modern digital logic interfaces. This architecture supports scalable integration—from 256 to over 1,000 macrocells—allowing reuse of design methodologies across product lines. For the LC4128V-5TN128C, this means consistent toolchain support (Lattice Diamond, Radiant) and predictable timing models, easing migration paths for future projects requiring higher density without overhauling verification environments.

Parts with Similar Specifications

The three parts on the right have similar specifications to Lattice Semiconductor Corporation LC4128V-5TN128C

Product Attribute LC4128V-5TN128I LC4128V-5T128C LC4128V-5TN144C LC4128V-5T128I
Part Number LC4128V-5TN128I LC4128V-5T128C LC4128V-5TN144C LC4128V-5T128I
Manufacturer Lattice Semiconductor Corporation Lattice Semiconductor Corporation Lattice Semiconductor Corporation Lattice Semiconductor Corporation
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Base Product Number - DAC34H84 MAX500 ADS62P42
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Delay Time tpd(1) Max - - - -
Voltage Supply - Internal - - - -
Programmable Type - - - -
Series - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Number of Logic Elements/Blocks - - - -
Number of Macrocells - - - -
Number of I/O - - - -
Mounting Type - Surface Mount Through Hole Surface Mount

LC4128V-5TN128C Datasheet PDF

Download LC4128V-5TN128C pdf datasheets and Lattice Semiconductor Corporation documentation for LC4128V-5TN128C - Lattice Semiconductor Corporation.

Datasheets
Cylindrical Battery Holders.pdf
Getting Started Guide
Product Selector Guide.pdf
Manuals
2.73KHz.pdf

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Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
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    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
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    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
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    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
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    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

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LC4128V-5TN128C Image

LC4128V-5TN128C

Lattice Semiconductor Corporation
32D-LC4128V-5TN128C

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