LC4064V-5T44I - 64-Macrocell 3.3V CPLD | Lattice Semiconductor
MPN: LC4064V-5T44I ✓ ActiveLC4064V-5T44I Overview
A complex programmable logic device, or CPLD, is a programmable-logic semiconductor that combines macrocell-based combinational and sequential logic with a nonvolatile configuration architecture. Within the broader hierarchy, a CPLD is a programmable-logic device, an FPGA alternative, and a semiconductor. Compared with a small FPGA, a CPLD generally offers predictable timing and in-system programmability, making it useful for control logic, interface conditioning, bus arbitration, and fixed logic consolidation.
The verified device information identifies 64 macrocells, 30 user I/Os, 3.3 V operation, 5.0 ns speed grading, a 227.27 MHz maximum frequency, 44-pin TQFP construction, and industrial-grade temperature positioning. Its in-system programming capability allows a board manufacturer to load or update the logic configuration during manufacturing, test, or field operation without removing the device from the circuit.
The LC4064V-5T44I is part of Lattice Semiconductor's SuperFAST high-density ispMACH 4000V family. The 5.0 ns grade is intended for designs requiring faster logic propagation than slower members of the family, while the 64 macrocells provide a moderate capacity for consolidating multiple fixed functions into one programmable device. The 30 available user I/Os support connections to external memories, control signals, communications peripherals, and mixed-signal system blocks.
Typical uses include industrial controller logic, data-acquisition interfaces, instrumentation, embedded system glue logic, protocol conversion, and legacy bus-interface consolidation. Its fixed-capacity architecture and in-system programmability are especially useful when a design must deliver deterministic behavior without the resource overhead and configuration complexity of a larger FPGA.
A critical design consideration is the 44-pin TQFP footprint and its 30 user I/O complement. The PCB must match the manufacturer's land pattern, preserve adequate clearance around all leads, and route high-speed or sensitive signals away from noisy switching nodes. Because verified pricing and detailed electrical limits were not present in the supplied records, designers should confirm the complete manufacturer datasheet and current distributor inventory before release.
This page consolidates verified distributor and datasheet-search records, same-family drop-in alternatives, technical comparisons, and practical selection guidance. It distinguishes confirmed device facts from missing electrical, pinout, pricing, and lifecycle details so that engineers can make a qualified sourcing or design decision without relying on unverified assumptions.
Drop-in alternatives for LC4064V-5T44I — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LC4064V-5T44I (same form factor and footprint) — differing in Device Type.
LC4064V-75TN44C
✅ Drop-In📋 Reference alternative (not in catalog)
LC4064V-10TN44I
✅ Drop-In📋 Reference alternative (not in catalog)
LC4064V-5TN44I
✅ Drop-In📋 Reference alternative (not in catalog)
LC4064B-5T44I
✅ Drop-InContact for price
View Datasheet →LC4064V-5T44C
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →LC4064V-5T44I Maximum Ratings & Electrical Characteristics
| Device Type | In-System Programmable Complex Programmable Logic Device |
| Product Family | ispMACH 4000V SuperFAST High Density PLD |
| Macrocell Count | 64 macrocells |
| User I/O Count | 30 I/Os |
| Supply Voltage | 3.3 V |
| Additional Supply Voltage Options | 2.5 V and 1.8 V |
| Speed Grade | 5.0 ns |
| Maximum System Frequency | 227.27 MHz |
| Package | 44-pin TQFP |
| Mounting Type | Surface mount |
| Temperature Grade | Industrial grade |
| Programming Support | In-system programming |
| Programmable Logic Type | Complex Programmable Logic Device |
| Logic Architecture | 64 macrocells with 30 user I/Os |
LC4064V-5T44I 44-pin tqfp Pin Configuration Guide
Pin configuration for LC4064V-5T44I (44-pin tqfp package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for LC4064V-5T44I.
Refer to the datasheet for full pin configuration.
Typical Applications
LC4064V-5T44I is suitable for 6 applications: Industrial Control Logic, Data-Acquisition Interface Consolidation, Instrumentation and Test Systems, Legacy Bus Interface Consolidation, Network Equipment Control, Programmable Security and Sequencing.
Industrial Control Logic
LC4064V-5T44I fits industrial controller designs that require deterministic programmable logic for interlocks, sequencing, state machines, and discrete I/O conditioning. Its 64 macrocells provide enough capacity to consolidate multiple fixed control functions, while the 5.0 ns speed grade supports short propagation delays in timing-sensitive paths. The 30 user I/Os can connect discrete sensors, actuator controls, status indicators, and inter-module handshake signals. Its industrial-grade ordering designation is relevant to factory equipment, but engineers must verify the complete operating-temperature limits. In-system programming also supports configuration updates during end-of-line test without removing the CPLD from the assembled control board.
Recommended
Data-Acquisition Interface Consolidation
LC4064V-5T44I can consolidate address decoding, sample sequencing, latch control, and data-format adaptation in a data-acquisition system. The 30 user I/Os provide direct connections to sensors, ADC control signals, memory interfaces, and test points, while 64 macrocells allow several small finite-state machines to share one programmable device. Its 5.0 ns speed grade can reduce uncertainty in acquisition sequencing compared with the 7.5 ns and 10 ns family alternatives. Because the verified records do not specify I/O voltage standards or AC timing across every path, the converter interface should be checked against the complete manufacturer datasheet before high-speed sampling rates are committed.
Recommended
Instrumentation and Test Systems
LC4064V-5T44I is suitable for instrumentation front ends that require programmable trigger logic, range selection, status sequencing, and interface conversion. Thirty user I/Os can accommodate control outputs, front-panel status lines, measurement triggers, and communications handshakes. The 5.0 ns grade is useful for coordinating fast measurement sequences, whereas LC4064V-10TN44I may reduce cost when timing is not critical. The industrial-grade positioning also fits laboratory and process-control instruments with moderate environmental requirements. A production design should confirm supply-current limits, I/O drive capability, and the exact operating-temperature range because those parameters were not included in the verified search snippets.
Recommended
Legacy Bus Interface Consolidation
LC4064V-5T44I can implement legacy peripheral interfaces, address decoding, bus arbitration, and protocol bridges when a design needs more logic than simple gates but does not require an FPGA. The 64 macrocells and 30 user I/Os make the device useful for joining several fixed bus functions into one package. The 5.0 ns grade helps minimize combinational delay in arbitration and command decoding paths. In-system programming allows board revisions to be handled by loading a revised configuration during manufacturing or maintenance. Before replacement, engineers should compare pin multiplexing, I/O standards, input thresholds, and timing for every connected bus; the supplied data establishes the package and capacity but not complete pin-function or electrical tables.
Recommended
Network Equipment Control
LC4064V-5T44I can be used for ancillary control logic in routers, switches, and communications equipment where it handles status aggregation, alarm masking, configuration sequencing, and front-panel or backplane signal conditioning. Thirty user I/Os are sufficient for multiple discrete management and indicator signals, while 64 macrocells support several related finite-state machines. Its 5.0 ns speed grade provides useful timing margin relative to LC4064V-10TN44I on local control paths. The device is not presented here as a replacement for a network transceiver or processor; it is a companion logic device that consolidates board-level control functions. Signal-integrity checks remain necessary for any path exposed to fast external edges or long board traces.
Recommended
Programmable Security and Sequencing
LC4064V-5T44I can implement programmable power sequencing, key-scan logic, interlock monitors, and finite-state-machine-based access sequences where the design benefits from a nonvolatile, reprogrammable logic solution. Its 64 macrocells allow multiple security-related state machines to be consolidated, and the 30 user I/Os support lock controls, credential inputs, alarm outputs, and sequencing signals. The 5.0 ns grade is appropriate where combinational decision paths must resolve rapidly, though it does not replace cryptographic hardware. For deployment, engineers should verify I/O tolerances, power-up behavior, configuration security features, and temperature limits from the manufacturer documentation. In-system programming can support controlled updates, subject to the product's intended configuration and security requirements.
Recommended
Recommended Products Summary
Engineering reference data for LC4064V-5T44I — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LC4064V-75TN44C | LC4064V-10TN44I | LC4064V-5TN44I | LC4064B-5T44I | LC4064V-5T44C |
|---|---|---|---|---|---|---|
| Package | 44-pin TQFP | 44-pin TQFP | 44-pin TQFP | 44-pin TQFP | 44-pin TQFP | 44-pin TQFP |
| Brand | Lattice Semiconductor | Lattice Semiconductor | Lattice Semiconductor | Lattice Semiconductor | Lattice Semiconductor | Lattice Semiconductor |
| Speed Grade | 5.0 ns | 7.5 ns | 10 ns | 5.0 ns | 5.0 ns | 5.0 ns |
Key Differentiators
- Faster timing grade than the verified slower LC4064 alternatives (vs LC4064V-75TN44C)
- Substantially tighter nominal propagation timing than the 10 ns member (vs LC4064V-10TN44I)
- Industrial-grade positioning for factory and embedded control environments (vs LC4064V-5T44C)
- Verified 64-macrocell and 30-I/O resource configuration (vs LC4064V-10TN44I)
Design Notes
Use the manufacturer land pattern for the 44-pin TQFP rather than a generic 44-lead template. The verified package is surface-mount TQFP with 30 user I/Os, but the supplied records do not include the authoritative numbered pin table. Verify pin-1 orientation, programming pins, configuration pins, supply rails, and grounds directly against the current Lattice Semiconductor datasheet before releasing artwork. Provide unobstructed assembly clearance and inspect the lead pitch under magnification because package-construction differences can create solder-bridging risk.
Route programming and configuration signals away from noisy switching nodes and preserve the voltage and timing requirements published for in-system programming. Although the device is rated for 3.3 V, 2.5 V, and 1.8 V operation according to the verified family description, the exact core, I/O, and programming voltage combinations must be checked for the selected configuration. Add appropriate ground-return paths and avoid long stubs on external control signals. Series damping or slew control should be evaluated with measured edge rates rather than added indiscriminately.
Do not substitute a 5.0 ns ordering-code variant without checking its exact temperature and package suffix. LC4064V-75TN44C and LC4064V-10TN44I have verified 44-pin TQFP package indications, but their speed grades are slower by 50% and 100%, respectively, relative to the 5.0 ns target. LC4064B-5T44I and suffix variants may differ in family-specific electrical behavior or ordering meaning. Qualification should therefore compare the complete pinout, timing tables, I/O standards, supply current, temperature range, and configuration procedure.
Compliance Information
The supplied verified records identify the device as an industrial-grade CPLD but do not provide manufacturer compliance declarations. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status must be confirmed from current Lattice Semiconductor product documentation.