Lattice Semiconductor Corporation LC4256B-75F256AC

Mfr. Part

LC4256B-75F256AC

Manufacturer

Lattice Semiconductor

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Detailed Description

In-system programmable CPLD from the ispMACH 4000 series with 256 macrocells and 128 I O. Typical internal delay 7.5 ns. Operates from a 2.3 V to 2.7 V internal supply. Packaged in a 256-ball fine-pitch BGA 17 x 17 body. Surface-mount device. Commercial junction temperature 0 to 90 C. Supplied in bulk. RoHS non-compliant

Key Features

In-system programmable via JTAG for fast updates and field reconfiguration

256 macrocells and 16 logic blocks for medium-density glue logic and control

128 user I O for wide connectivity and parallel interfaces

7.5 ns tpd typical for predictable, low-latency logic paths

Internal core supply range 2.3 V to 2.7 V for power-sensitive designs

Deterministic CPLD timing for stable performance across temperature and voltage

ispMACH 4000 architecture optimized for low skew and robust timing closure

Surface-mount FPBGA package for high I O density in compact layouts

Broad tool support for synthesis, place and route, and JTAG programming

Key Advantages

Fast and deterministic timing helps meet tight control and interface deadlines

Easy in-system updates reduce service time and speed feature changes

High I O count simplifies bus bridging, pin multiplexing, and legacy interface support

Compact FPBGA saves PCB space while keeping signal integrity strong

Lower core voltage improves power efficiency compared to older CPLDs

Proven ispMACH family for long-term reliability in industrial and embedded uses

Short design cycles thanks to simple product-term CPLD architecture

Stable operation over commercial temperature with clear timing budgets

Packaging

Type 256-FPBGA fine-pitch ball grid array

Material plastic encapsulation with BT resin substrate typical for BGA packages

Body size approximately 17 mm x 17 mm noted as 17 x 17

Pin configuration 256 solder balls in a 17 x 17 matrix refer to datasheet for exact ballout

Solder ball composition likely tin lead due to RoHS non-compliant status confirm in datasheet

Mounting surface mount suitable for standard BGA reflow profiles

Thermal characteristics junction temperature range 0 to 90 C good thermal design and PCB copper area recommended

Electrical properties internal core supply 2.3 V to 2.7 V tpd 7.5 ns 256 macrocells 128 I O 16 logic blocks series ispMACH 4000

Lifecycle

Status mature product in an established family availability can vary by speed grade and package

Not indicated here as end of life. For latest lifecycle and stock updates contact Y-IC

Equivalent models within the same family typically differ by speed grade or package. Examples from the ispMACH 4000 family with similar density include variants of LC4256B in other packages or speed grades. Pinouts and thermal ratings will differ. Confirm exact part numbers and compatibility with our sales team

Alternative CPLD options not drop-in but functionally similar

- Lattice MachXO or MachXO2 and MachXO3 families for modern nonvolatile programmable logic

- Xilinx CoolRunner-II XC2C256 similar macrocell class

- Intel Altera MAX II or MAX V families EPM240 EPM570 class devices

- Microchip Atmel ATF1508 family comparable density

If you need strict pin compatibility or guaranteed long-term supply please contact our sales team via the Y-IC website for tailored recommendations

Key Application Areas

Industrial control and state machines

Glue logic between microcontrollers DSPs and peripherals

Bus bridging and arbitration for legacy and modern interfaces

I O expansion pin multiplexing and timing alignment

Power sequencing reset generation and board management

Communications interfaces level translation and protocol adaptation

Consumer and embedded systems requiring deterministic low-latency logic

Test and measurement instrumentation trigger and capture control

Datasheet

Y-IC hosts the most authoritative datasheet for LC4256B-75F256AC on our product page. We recommend downloading the datasheet here to get exact ballout power pins timing models programming details and design guidelines

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